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Bizzotto D, Dahl MJ, Veneroni C, Lavizzari A, Rebentisch A, Dawson E, Bowen S, Zuspan K, Yoder BA, Albertine KH, Dellacà RL. Impact of neonatal noninvasive resuscitation strategies on lung mechanics, tracheal pressure, and tidal volume in preterm lambs. Am J Physiol Lung Cell Mol Physiol 2024. [PMID: 38771135 DOI: 10.1152/ajplung.00236.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 05/15/2024] [Indexed: 05/22/2024] Open
Abstract
This study investigated the relationship between three respiratory support approaches on lung volume recruitment during the first two hours of postnatal life in preterm lambs. We estimated changes in lung aeration, measuring respiratory resistance and reactance by oscillometry at 5 Hz. We also measured intratracheal pressure in subsets of lambs. The first main finding is that sustained inflation (SI) applied noninvasively (Mask SI; n=7) or invasively (endotracheal tube, ETT SI; n=6) led to similar rapid lung volume recruitment (~6 min). In contrast, Mask continuous positive airway pressure (CPAP) without SI (n=6) resuscitation took longer (~30-45 min) to reach similar lung volume recruitment. The second main finding is that, in the first 15 min of postnatal life, the Mask CPAP without SI group closed their larynx during custom ventilator-driven expiration, leading to intratracheal positive end-expiratory pressure of ~17 cmH2O (instead of 8 cmH2O provided by the ventilator). In contrast, the Mask SI group used the larynx to limit inspiratory pressure to ~26 cmH2O (instead of 30 cmH2O provided by the ventilator). These different responses affected tidal volume, being larger in the Mask CPAP without SI group (8.4 ml/Kg, 6.7-9.3 IQR) compared to the Mask SI (5.0 ml/Kg, 4.4-5.2 IQR), and ETT SI groups (3.3 ml/Kg 2.6-3.7 IQR). Distinct physiological responses suggest that spontaneous respiratory activity of the larynx of preterm lambs at birth can uncouple pressure applied by the ventilator to that applied to the lung, leading to unpredictable lung pressure and tidal volumes delivery independently from the ventilator settings.
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Affiliation(s)
- Davide Bizzotto
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milano, Italy
| | - Mar Janna Dahl
- Department of Pediatrics, University of Utah, Salt Lake City, UT, United States
| | - Chiara Veneroni
- Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milano, Italy
| | - Anna Lavizzari
- NICU, Fondazione IRCCS Ca' Granda, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milano, Italy
| | - Andrew Rebentisch
- Department of Pediatrics, University of Utah, Salt Lake City, UT, United States
| | - Elaine Dawson
- Department of Pediatrics, University of Utah, Salt Lake City, UT, United States
| | - Sydney Bowen
- Department of Pediatrics, University of Utah, Salt Lake City, UT, United States
| | - Kaitlin Zuspan
- Department of Pediatrics, University of Utah, Salt Lake City, UT, United States
| | - Bradley A Yoder
- Department of Pediatrics, University of Utah, Salt Lake City, UT, United States
| | - Kurt H Albertine
- Department of Pediatrics, University of Utah, Salt Lake City, UT, United States
| | - Raffaele L Dellacà
- Dipartimento di Elettronica, Informatica e Bioingegneria, Politecnico di Milano, Milano, Italy
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Rath AK, Sahu D, De S. Oscillometry-Defined Small Airway Dysfunction in Patients with Chronic Obstructive Pulmonary Disease. Tuberc Respir Dis (Seoul) 2024; 87:165-175. [PMID: 38225686 PMCID: PMC10990611 DOI: 10.4046/trd.2023.0139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/04/2023] [Accepted: 12/26/2023] [Indexed: 01/17/2024] Open
Abstract
BACKGROUND The prevalence of small airway dysfunction (SAD) in patients with chronic obstructive pulmonary disease (COPD) across different ethnicities is poorly understood. This study aimed to estimate the prevalence of SAD in stable COPD patients. METHODS We conducted a cross-sectional study of 196 consecutive stable COPD patients. We measured pre- and post-bronchodilator (BD) lung function and respiratory impedance. The severity of COPD and lung function abnormalities was graded in accordance with the Global Initiative for Chronic Obstructive Lung Disease (GOLD) guidelines. SAD was defined as either difference in whole-breath resistance at 5 and 19 Hz > upper limit of normal or respiratory system reactance at 5 Hz < lower limit of normal. RESULTS The cohort consisted of 95.9% men, with an average age of 66.3 years. The mean forced expiratory volume 1 second (FEV1) % predicted was 56.4%. The median COPD assessment test (CAT) scores were 14. The prevalence of post-BD SAD across the GOLD grades 1 to 4 was 14.3%, 51.1%, 91%, and 100%, respectively. The post-BD SAD and expiratory flow limitation at tidal breath (EFLT) were present in 62.8% (95% confidence interval [CI], 56.1 to 69.9) and 28.1% (95% CI, 21.9 to 34.2), respectively. COPD patients with SAD had higher CAT scores (15.5 vs. 12.8, p<0.01); poor lung function (FEV1% predicted 46.6% vs. 72.8%, p<0.01); lower diffusion capacity for CO (4.8 mmol/min/kPa vs. 5.6 mmol/min/kPa, p<0.01); hyperinflation (ratio of residual volume to total lung capacity % predicted: 159.7% vs. 129%, p<0.01), and shorter 6-minute walk distance (367.5 m vs. 390 m, p=0.02). CONCLUSION SAD is present across all severities of COPD. The prevalence of SAD increases with disease severity. SAD is associated with poor lung function and higher symptom burden. Severe SAD is indicated by the presence of EFLT.
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Affiliation(s)
- Amit K. Rath
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Raipur, India
| | - Dibakar Sahu
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Raipur, India
| | - Sajal De
- Department of Pulmonary Medicine, All India Institute of Medical Sciences, Raipur, India
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Noh SA, Kim HS, Kang SH, Yoon CH, Youn TJ, Chae IH. History and evolution of blood pressure measurement. Clin Hypertens 2024; 30:9. [PMID: 38556854 PMCID: PMC10983645 DOI: 10.1186/s40885-024-00268-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 02/27/2024] [Indexed: 04/02/2024] Open
Abstract
Hypertension is the leading cause of morbidity and mortality worldwide. Hypertension mostly accompanies no symptoms, and therefore blood pressure (BP) measurement is the only way for early recognition and timely treatment. Methods for BP measurement have a long history of development and improvement. Invasive method via arterial cannulation was first proven possible in the 1800's. Subsequent scientific progress led to the development of the auscultatory method, also known as Korotkoff' sound, and the oscillometric method, which enabled clinically available BP measurement. However, hypertension management status is still poor. Globally, less than half of adults are aware of their hypertension diagnosis, and only one-third of them being treated are under control. Novel methods are actively investigated thanks to technological advances such as sensors and machine learning in addition to the clinical needs for easier and more convenient BP measurement. Each method adopts different technologies with its own specific advantages and disadvantages. Promises of novel methods include comprehensive information on out-of-office BP capturing dynamic short-term and long-term fluctuations. However, there are still pitfalls such as the need for regular calibration since most novel methods capture relative BP changes rather than an absolute value. In addition, there is growing concern on their accuracy and precision as conventional validation protocols are inappropriate for cuffless continuous methods. In this article, we provide a comprehensive overview of the past and present of BP measurement methods. Novel and emerging technologies are also introduced with respect to their potential applications and limitations.
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Affiliation(s)
- Su A Noh
- Cardiovascular Center, Department of Internal Medicine, Seoul National University Bundang Hospital, 82, Gumi-Ro 173 Beon-Gil, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, 13620, South Korea
| | - Hwang-Soo Kim
- Cardiovascular Center, Department of Internal Medicine, Seoul National University Bundang Hospital, 82, Gumi-Ro 173 Beon-Gil, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, 13620, South Korea
| | - Si-Hyuck Kang
- Cardiovascular Center, Department of Internal Medicine, Seoul National University Bundang Hospital, 82, Gumi-Ro 173 Beon-Gil, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, 13620, South Korea.
- Department of Internal Medicine, Seoul National University, Seoul, South Korea.
| | - Chang-Hwan Yoon
- Cardiovascular Center, Department of Internal Medicine, Seoul National University Bundang Hospital, 82, Gumi-Ro 173 Beon-Gil, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, 13620, South Korea
- Department of Internal Medicine, Seoul National University, Seoul, South Korea
| | - Tae-Jin Youn
- Cardiovascular Center, Department of Internal Medicine, Seoul National University Bundang Hospital, 82, Gumi-Ro 173 Beon-Gil, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, 13620, South Korea
- Department of Internal Medicine, Seoul National University, Seoul, South Korea
| | - In-Ho Chae
- Cardiovascular Center, Department of Internal Medicine, Seoul National University Bundang Hospital, 82, Gumi-Ro 173 Beon-Gil, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, 13620, South Korea
- Department of Internal Medicine, Seoul National University, Seoul, South Korea
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Le Rouzic O, Picaud M, Salvator H, Bautin N, Devillier P, Perez T. Residual reversibility in COPD patients already on long-acting bronchodilator: The OscilloRevers Study. Respir Med Res 2024; 85:101082. [PMID: 38280281 DOI: 10.1016/j.resmer.2023.101082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 11/21/2023] [Accepted: 12/01/2023] [Indexed: 01/29/2024]
Abstract
BACKGROUND Dyspnea is a complex symptom of chronic obstructive pulmonary disease (COPD) which is not strongly correlated with lung function measures. Long-acting bronchodilators (LAB) may reduce this dyspnea, but some patients report persistent chronic dyspnea despite this treatment. This study aims to assess residual reversibility and clinical response after short-acting bronchodilator (SAB) in COPD patients already treated by LAB and reporting persistent dyspnea. METHODS COPD patients with a persistent dyspnea (modified Medical Research Council scale (mMRC) ≥1) despite current stable treatment with at least one LAB were included. Spirometry, plethysmography and impulse oscillometry (IOS) were performed at peak effect of their LAB and repeat 45 min after the intake of two SAB (400 µg of salbutamol and 80 µg of ipratropium). Dyspnea improvement was assessed at 45 min after SAB through a comparative two-sided VAS (-100 mm for maximal improvement; +100 mm for maximal degradation). RESULTS Twenty-two COPD patients were analyzed, mainly men (59.1 %) with a mean age of 60.6 years and a median FEV1 of 54 % of predicted values. Fifty percent of patients reported a severe basal dyspnea (mMRC ≥2). After SAB, spirometric and plethysmographic measurements were statistically improved. For IOS measurement, reactance at 5 Hz (X5) and area of reactance (AX) were also improved. Fifty percent of patients reported a clinically relevant improvement of their resting dyspnea. However, no correlation was found between dyspnea improvement and functional measures. CONCLUSIONS Fifty percent of COPD patients regularly treated with one or two LAB still report a relevant improvement of resting dyspnea after the adjunctive intake of double short-acting bronchodilators. Physiological mechanisms associated with this improvement remain to be determined. CLINICAL TRIAL REGISTRATION NCT02928744.
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Affiliation(s)
- Olivier Le Rouzic
- CHU Lille, Pneumologie et Immuno-Allergologie, F-59000 Lille, France; Univ. Lille, CHU Lille, CNRS, Inserm, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, F-59000 Lille, France.
| | - Marjorie Picaud
- CH Tourcoing, Respiratory disease department, F-59200 Tourcoing, France
| | - Hélène Salvator
- Hopital Foch, Service de Pneumologie, F-92150 Suresnes, France; Virologie et Immunologie Moléculaire (VIM), V2I, UMR 0892, Université Paris-Saclay, F-92150 Suresnes, France
| | - Nathalie Bautin
- CHU Lille, Pneumologie et Immuno-Allergologie, F-59000 Lille, France; Univ. Lille, CHU Lille, CNRS, Inserm, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, F-59000 Lille, France; CHU Lille, Explorations Fonctionnelles Respiratoires, F-59000 Lille, France
| | - Philippe Devillier
- Hopital Foch, Service de Pneumologie, F-92150 Suresnes, France; Virologie et Immunologie Moléculaire (VIM), V2I, UMR 0892, Université Paris-Saclay, F-92150 Suresnes, France
| | - Thierry Perez
- CHU Lille, Pneumologie et Immuno-Allergologie, F-59000 Lille, France; Univ. Lille, CHU Lille, CNRS, Inserm, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, F-59000 Lille, France; CHU Lille, Explorations Fonctionnelles Respiratoires, F-59000 Lille, France
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Ishikawa T, Nishikiori H, Mori Y, Fujino K, Saito A, Takahashi M, Kuronuma K, Hinotsu S, Chiba H. The impact of respiratory reactance in oscillometry on survival in patients with idiopathic pulmonary fibrosis. BMC Pulm Med 2024; 24:10. [PMID: 38167026 PMCID: PMC10763674 DOI: 10.1186/s12890-023-02776-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 11/20/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Idiopathic pulmonary fibrosis (IPF) is a progressive disease with a poor prognosis. Pulmonary function tests (PFTs) aid in evaluating the disease status of IPF. The clinical significance of oscillometry measurements in interstitial lung diseases has recently been reported. Our previous study showed that respiratory reactance (Xrs) measured by oscillometry reflected disease severity and predicted subsequent lung capacity decline in patients with IPF. However, the direct impact of Xrs on survival needs to be determined, and there are currently no reference values in oscillometry to predict prognosis. Therefore, this study aimed to investigate the association between oscillometry measurements, particularly Xrs, and survival in patients with IPF and to determine the cutoff values of Xrs that predict 3-year survival. METHODS We analyzed the relationship between the measured values of PFT and oscillometry derived from 178 patients with IPF. Univariate and multivariate Cox proportional hazards analyses were performed to investigate the relationships between clinical indices at the time of the first oscillometry and survival. We performed the time-dependent receiver operating characteristic (ROC) curve analysis to set the optimized cutoff values of Xrs for 3-year survival prediction. We examined the discriminating power of cutoff values of Xrs on survival using the Kaplan-Meier method and the log-rank test. RESULTS Xrs components, especially in the inspiratory phase (In), significantly correlated with the PFT values. In the multivariate analyses, Xrs (all of reactance at 5 Hz [X5], resonant frequency [Fres], and low-frequency reactance area [ALX] in the inspiratory phase) had a significant impact on survival (X5, p = 0.003; Fres, p = 0.016; ALX, p = 0.003) independent of age, sex, and other prognostic factors derived from the univariate analysis. The area under the ROC curve was 0.765, 0.759, and 0.766 for X5 In, Fres In, and ALX In, with cutoff values determined at - 0.98, 10.67, and 5.32, respectively. We found significant differences in survival after dividing patients using each of the cutoff values of Xrs. CONCLUSIONS In patients with IPF, Xrs measured by oscillometry significantly impacted survival. We also determined the cutoff values of Xrs to discriminate patients with poor prognoses.
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Affiliation(s)
- Tatsuru Ishikawa
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Hirotaka Nishikiori
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan.
| | - Yuki Mori
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Keiko Fujino
- Department of Urology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Atsushi Saito
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Mamoru Takahashi
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Koji Kuronuma
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Shiro Hinotsu
- Department of Biostatistics and Data Management, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
| | - Hirofumi Chiba
- Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, South-1, West-16 Chuo-Ku, Sapporo, Hokkaido, 060-8556, Japan
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Baglyas S, Valkó L, Móró V, Podmaniczky E, Czövek D, Makan G, Gingl Z, Gál J, Hantos Z, Lorx A. Using intra-breath oscillometry in obesity hypoventilation syndrome to detect tidal expiratory flow limitation: a potential marker to optimize CPAP therapy. BMC Pulm Med 2023; 23:477. [PMID: 38017501 PMCID: PMC10685591 DOI: 10.1186/s12890-023-02777-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 11/21/2023] [Indexed: 11/30/2023] Open
Abstract
BACKGROUND Continuous positive airway pressure (CPAP) therapy has profound effects in obesity hypoventilation syndrome (OHS). Current therapy initiation focuses on upper airway patency rather than the assessment of altered respiratory mechanics due to increased extrapulmonary mechanical load. METHODS We aimed to examine the viability of intra-breath oscillometry in optimizing CPAP therapy for OHS. We performed intra-breath oscillometry at 10 Hz in the sitting and supine positions, followed by measurements at increasing CPAP levels (none-5-10-15-20 cmH2O) in awake OHS patients. We plotted intra-breath resistance and reactance (Xrs) values against flow (V') and volume (V) to identify tidal expiratory flow limitation (tEFL). RESULTS Thirty-five patients (65.7% male) completed the study. We found a characteristic looping of the Xrs vs V' plot in all patients in the supine position revealing tEFL: Xrs fell with decreasing flow at end-expiration. Intra-breath variables representing expiratory decrease of Xrs became more negative in the supine position [end-expiratory Xrs (mean ± SD): -1.9 ± 1.8 cmH2O·s·L- 1 sitting vs. -4.2 ± 2.2 cmH2O·s·L- 1 supine; difference between end-expiratory and end-inspiratory Xrs: -1.3 ± 1.7 cmH2O·s·L- 1 sitting vs. -3.6 ± 2.0 cmH2O·s·L- 1 supine, p < 0.001]. Increasing CPAP altered expiratory Xrs values and loop areas, suggesting diminished tEFL (p < 0.001). 'Optimal CPAP' value (able to cease tEFL) was 14.8 ± 4.1 cmH2O in our cohort, close to the long-term support average of 13.01(± 2.97) cmH2O but not correlated. We found no correlation between forced spirometry values, patient characteristics, apnea-hypopnea index and intra-breath oscillometry variables. CONCLUSIONS tEFL, worsened by the supine position, can be diminished by stepwise CPAP application in most patients. Intra-breath oscillometry is a viable method to detect tEFL during CPAP initiation in OHS patients and tEFL is a possible target for optimizing therapy in OHS patients.
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Affiliation(s)
- Szabolcs Baglyas
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1082 Üllői út 78/B, Budapest, Hungary.
| | - Luca Valkó
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1082 Üllői út 78/B, Budapest, Hungary
| | - Vivien Móró
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1082 Üllői út 78/B, Budapest, Hungary
| | - Eszter Podmaniczky
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1082 Üllői út 78/B, Budapest, Hungary
| | - Dorottya Czövek
- Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Gergely Makan
- Department of Technical Informatics, University of Szeged, Szeged, Hungary
| | - Zoltán Gingl
- Department of Technical Informatics, University of Szeged, Szeged, Hungary
| | - János Gál
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1082 Üllői út 78/B, Budapest, Hungary
| | - Zoltán Hantos
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1082 Üllői út 78/B, Budapest, Hungary
| | - András Lorx
- Department of Anesthesiology and Intensive Therapy, Semmelweis University, 1082 Üllői út 78/B, Budapest, Hungary
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Kim HL, Park SM, Cho IJ, Kim YM, Kim DH, Kim SH, Kim KI, Sung KC, Ihm SH, Shin J, Kim Y, Oh K, Lee EM. Standardized protocol of blood pressure measurement and quality control program for the Korea National Health and Nutrition Examination Survey. Clin Hypertens 2023; 29:28. [PMID: 37821979 PMCID: PMC10568909 DOI: 10.1186/s40885-023-00252-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 09/05/2023] [Indexed: 10/13/2023] Open
Abstract
Accurate blood pressure (BP) measurement is crucial for hypertension detection and management. The Korea National Health and Nutrition Examination Survey (KNHANES) assesses the health of Koreans using representative cross-sectional data. BP measurements were historically done with mercury sphygmomanometers for participants aged ≥10 years. However, KNHANES transitioned to Greenlight 300TM (mercury-free auscultatory device) in 2020 for participants aged ≥6 years and used dual devices (Microlife WatchBP Office AFIB and Greenlight) in 2021-2022. To ensure consistency, KNHANES will adopt Microlife as the unified BP device with Greenlight for device validation from 2023. Under the new protocol, participants aged ≥6 years will have their BP measured three times at 30-second intervals after a 5-minute rest under ambient temperature (20-25℃) and noise ≤65 dB. The average of the 2nd and 3rd readings will be used as the representative BP value. The quality control (QC) program involves four trained examiners passing the "quality control and assurance of BP measurement program" three times annually, and undergoing "video monitoring of weekly calibration process" once a year. Additionally, the QC team will conduct "on-site evaluations of BP measurement" at mobile examination centers three times a year. A Five-Step QC process for BP devices was also developed. This document outlines the standardized BP measurement protocol and rigorous QC program in KNHANES, aiming to ensure accurate and reliable BP data for epidemiological research and public health policymaking in South Korea.
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Affiliation(s)
- Hack-Lyoung Kim
- Division of Cardiology, Department of Internal Medicine, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sang Min Park
- Divison of Cardiology, Department of Internal Medicine, Nowon Eulji Medical Center, Eulji University College of Medicine, Seoul, Republic of Korea
| | - In Jeong Cho
- Division of Cardiology, Department of Internal Medicine, Ewha Womans University Seoul Hospital, Ewha Womans University College of Medicine, Seoul, Republic of Korea
| | - Yu-Mi Kim
- Department of Preventive, College of Medicine, Hanyang University, Seoul, Republic of Korea
- Hanyang University School of Public Health, Seoul, Republic of Korea
| | - Dae-Hee Kim
- Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sung Hye Kim
- Department of Pediatrics, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Kwang-Il Kim
- Division of Geriatrics, Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
| | - Ki-Chul Sung
- Division of Cardiology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Sang-Hyun Ihm
- Division of Cardiology, Department of Internal Medicine, College of Medicine, Bucheon St. Mary's Hospital, The Catholic University of Korea, Bucheon, Republic of Korea
| | - Jinho Shin
- Division of Cardiology, Department of Internal Medicine, College of Medicine, Hanyang University, Seoul, Republic of Korea
| | - Yoonjung Kim
- Division of Health and Nutrition Survey and Analysis, Bureau of Chronic Disease Prevention and Control, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea
| | - Kyungwon Oh
- Division of Health and Nutrition Survey and Analysis, Bureau of Chronic Disease Prevention and Control, Korea Disease Control and Prevention Agency, Cheongju, Republic of Korea
| | - Eun Mi Lee
- Division of Cardiology, Department of Internal Medicine, Wonkwang University Sanbon Hospital, Gunpo, Gyeonggi-do, 15865, Republic of Korea.
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Philippat C, Coiffier O, Lyon-Caen S, Boudier A, Jovanovic N, Quentin J, Gioria Y, Haug LS, Thomsen C, Bayat S, Slama R, Siroux V. In utero exposure to poly- and perfluoroalkyl substances and children respiratory health in the three first years of life. Environ Res 2023; 234:116544. [PMID: 37406719 DOI: 10.1016/j.envres.2023.116544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 06/15/2023] [Accepted: 07/01/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND Poly- and perfluoroalkyl substances (PFAS) are used in a wide range of products. Experimental studies suggested impaired lung development and pro-inflammatory response following exposure to some PFAS. We aimed to assess the associations between prenatal exposure to PFAS and children respiratory health. METHODS The study is based on 433 mother-child pairs. 26 PFAS were measured in maternal serum collected during pregnancy. Lung function parameters were measured at 2 months using tidal breathing flow-volume loops and multiple-breath nitrogen washout and at 36 months using oscillometry. Incidence of respiratory health diseases (asthma, wheeze, bronchitis, bronchiolitis) in the first 36 months of life was assessed by repeated questionnaires. A cluster-based analysis was applied to identify prenatal PFAS exposure patterns. Adjusted linear and logistic regressions were performed to assess the associations between PFAS exposure patterns as well as individual PFAS, and each respiratory health parameter. RESULTS We excluded 13 PFAS due to low quantification (<5%). Relying on the 13 remaining PFAS, we identified three exposure clusters, characterized by low (N = 163), medium (N = 236) and high (N = 51) pregnancy PFAS concentrations. Compared to children belonging to the low exposure group, children in the moderate exposure group had higher reactance at 7 Hz (X7) and lower frequency dependence of resistance between 7 Hz and 19 Hz (R7-19) at 36 months, suggesting better lung function. No association of any exposure metric was detected with respiratory diseases in the first 3 years of life. CONCLUSIONS Our study relying on both mixture and uni-pollutant analyses, does not provide evidence for a deleterious effect of prenatal PFAS exposure on respiratory health at an early age.
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Affiliation(s)
- Claire Philippat
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France.
| | - Ophélie Coiffier
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France
| | - Sarah Lyon-Caen
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France
| | - Anne Boudier
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France; Pediatrics, CHU Grenoble-Alpes, Grenoble, France
| | - Nicolas Jovanovic
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France
| | - Joane Quentin
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France; Department of Pulmonology and Physiology, CHU Grenoble Alpes, Grenoble, France
| | - Yoann Gioria
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France; Department of Pulmonology and Physiology, CHU Grenoble Alpes, Grenoble, France
| | - Line Smastuen Haug
- Department of Food Safety, Norwegian Institute of Public Health, Oslo, Norway
| | - Cathrine Thomsen
- Department of Food Safety, Norwegian Institute of Public Health, Oslo, Norway
| | - Sam Bayat
- Department of Pulmonology and Physiology, CHU Grenoble Alpes, Grenoble, France
| | - Rémy Slama
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France
| | - Valérie Siroux
- University Grenoble Alpes, Inserm U1209, CNRS UMR 5309, Team of Environmental Epidemiology Applied to Reproduction and Respiratory Health, Institute for Advanced Biosciences 38000, Grenoble, France
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Henry C, Biardel S, Boucher M, Godbout K, Chakir J, Côté A, Laviolette M, Bossé Y. Bronchial thermoplasty attenuates bronchodilator responsiveness. Respir Med 2023; 217:107340. [PMID: 37422022 DOI: 10.1016/j.rmed.2023.107340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/31/2023] [Accepted: 06/25/2023] [Indexed: 07/10/2023]
Abstract
INTRODUCTION Bronchial thermoplasty is an effective intervention to improve respiratory symptoms and to reduce the rate of exacerbations in uncontrolled severe asthma. A reduction in airway smooth muscle is arguably the most widely discussed mechanisms accounting for these clinical benefits. Yet, this smooth muscle reduction should also translate into an impaired response to bronchodilator drugs. This study was designed to address this question. METHODS Eight patients with clinical indication for thermoplasty were studied. They were uncontrolled severe asthmatics despite optimal environmental control, treatment of comorbidities, and the use of high-dose inhaled corticosteroids and long-acting β2-agonists. Lung function measured by spirometry and respiratory mechanics measured by oscillometry were examined pre- and post-bronchodilator (salbutamol, 400 μg), both before and at least 1 year after thermoplasty. RESULTS Consistent with previous studies, thermoplasty yielded no benefits in terms of baseline lung function and respiratory mechanics, despite improving symptoms based on two asthma questionnaires (ACQ-5 and ACT-5). The response to salbutamol was also not affected by thermoplasty based on spirometric readouts, including forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and FEV1/FVC ratio. However, a significant interaction was observed between thermoplasty and salbutamol for two oscillometric readouts, namely reactance at 5 Hz (Xrs5) and reactance area (Ax), showing an attenuated response to salbutamol after thermoplasty. CONCLUSIONS Thermoplasty attenuates the response to a bronchodilator. We argue that this result is a physiological proof of therapeutic efficacy, consistent with the well-described effect of thermoplasty in reducing the amount of airway smooth muscle.
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Affiliation(s)
- Cyndi Henry
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Sabrina Biardel
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Magali Boucher
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Krystelle Godbout
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Jamila Chakir
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Andréanne Côté
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Michel Laviolette
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada
| | - Ynuk Bossé
- Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ) - Université Laval, Québec, Canada.
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Cherrez-Ojeda I, Osorio MF, Robles-Velasco K, Calderón JC, Cortés-Télles A, Zambrano J, Guarderas C, Intriago B, Gochicoa-Rangel L. Small airway disease in post-acute COVID-19 syndrome, a non-conventional approach in three years follow-up of a patient with long COVID: a case report. J Med Case Rep 2023; 17:386. [PMID: 37691104 PMCID: PMC10494419 DOI: 10.1186/s13256-023-04113-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 08/03/2023] [Indexed: 09/12/2023] Open
Abstract
BACKGROUND Small airways disease (SAD), a novel finding described in post-acute COVID-19 patients, should be suspected when respiratory symptoms continue, air trapping persists on expiratory CT scans, and imaging findings fail to improve despite objectively better conventional pulmonary function test (PFT) parameters. The forced oscillation technique (FOT) and Multiple breathing washout (MBW) are both very sensitive methods for detecting anomalies in the peripheral airways. CASE PRESENTATION We discuss the case of a 60-year-old Hispanic patient who had severe COVID-19 pneumonia and developed dyspnea, fatigue, and limited daily activity a year later. The PFTs revealed restrictive lung disease, as seen by significant diffusing capacity of the lungs for carbon monoxide (DLCO) decrease, severe desaturation, and poor 6-min walk test (6MWT) performance. The patient was treated with lowering corticosteroids as well as pulmonary rehabilitation (PR). During the 24-month follow-up, the dyspnea and fatigue persisted. On PFTs, 6MWT performance and restricted pattern improved slightly, but MBW discovered significant ventilatory inhomogeneity. FOT revealed substantial peripheral airway obstructive abnormalities. On CT scans, air trapping and ground-glass opacities (GGO) improved somewhat. The patient used a bronchodilator twice a day and low-dose inhaled corticosteroids (160 µg of budesonide and 4.5 µg of formoterol fumarate dihydrate) for nine months. PR sessions were resuming. The restricting parameters were stabilized and the DLCO had normalized after 36 months, with a 6MWT performance of 87% but significant desaturation. The CT scan revealed traction bronchiectasis, low GGO, and persistent air trapping. Without normalization, FOT and MBW scores improved, indicating small airway disease. CONCLUSIONS The necessity of integrating these tests when detecting SAD is emphasized in our paper. This article lays the foundation for future research into the best ways to manage and monitor SAD in post-acute COVID-19 patients.
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Affiliation(s)
- Ivan Cherrez-Ojeda
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador.
- Respiralab, Respiralab Research Group, Guayaquil, Ecuador.
| | - Maria F Osorio
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador
| | - Karla Robles-Velasco
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador
- Respiralab, Respiralab Research Group, Guayaquil, Ecuador
| | | | - Arturo Cortés-Télles
- Departamento de Neumología y Cirugía de Tórax, Hospital Regional de Alta Especialidad de Yucatán, Mérida, Mexico
| | - Jorge Zambrano
- Centro de enfermedades respiratorias, rehabilitación y sueño (CERS), Guayaquil, Ecuador
| | - Cristian Guarderas
- Centro de enfermedades respiratorias, rehabilitación y sueño (CERS), Guayaquil, Ecuador
| | - Belen Intriago
- Universidad Espíritu Santo, Km. 2.5 Vía La Puntilla, Samborondón, 0901-952, Ecuador
- Respiralab, Respiralab Research Group, Guayaquil, Ecuador
| | - Laura Gochicoa-Rangel
- Departamento de Fisiología Respiratoria, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Ciudad de México, Mexico
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Pisi R, Aiello M, Frizzelli A, Feci D, Aredano I, Manari G, Calzetta L, Pelà G, Chetta A. Detection of Small Airway Dysfunction in Asthmatic Patients by Spirometry and Impulse Oscillometry System. Respiration 2023; 102:487-494. [PMID: 37393905 PMCID: PMC10568607 DOI: 10.1159/000531205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 05/15/2023] [Indexed: 07/04/2023] Open
Abstract
BACKGROUND There is no gold standard in diagnosing SAD. Indicators of SAD are considered: (a) a value <65% of predicted values of two of three measures, FEF25-75, FEF50 e FEF75 (FEF+); (b) a value of FEV3/FEV6 < LLN (FEV3/FEV6+); (c) an IOS value of R5-R20 >0.07 kPa·s·L-1 (R5-R20+). AIM AND OBJECTIVES The aim of the study was to ascertain, in asthmatic patients, whether spirometry and IOS indicators agree in detecting SAD. We also assessed the relationship between spirometry and IOS indicators and clinical features of asthma. METHODS We prospectively recruited adult asthmatic patients. Anthropometric and clinical characteristics were recorded. All patients performed spirometry and IOS tests. RESULTS We enrolled 301 asthmatic patients (179 females; mean age 50 ± 16 years) with normal to moderately severe degree of airway obstruction; 91% were non-smokers, 74% were atopic, 28% had an exacerbation in the previous year, and 18% had a poor asthma control by ACT. SAD was diagnosed in 62% of patients through FEF+, in 40% through FEV3/FEV6+ and in 41% through R5-R20+. κ values were 0.49 between FEF+ and FEV3/FEV6+, 0.20 between FEF+ and R5-R20+, 0.07 between FEV3/FEV6+ and R5-R20+. R5-R20+ but not FEF+ and FEV3/FEV6+ was significantly associated with ACT score (p < 0.05). CONCLUSIONS Our study shows that in mild to moderately severe asthmatic patients, spirometry and IOS indicators are complementary in diagnosing SAD. Additionally, IOS indicator, but not spirometry ones, was related to asthma control.
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Affiliation(s)
- Roberta Pisi
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Marina Aiello
- Department of Medicine and Surgery, University of Parma, Parma, Italy
- Cardio-Thoracic and Vascular Department, University Hospital of Parma, Parma, Italy
| | - Annalisa Frizzelli
- Department of Medicine and Surgery, University of Parma, Parma, Italy
- Cardio-Thoracic and Vascular Department, University Hospital of Parma, Parma, Italy
| | - Davide Feci
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Ilaria Aredano
- Cardio-Thoracic and Vascular Department, University Hospital of Parma, Parma, Italy
| | - Gaia Manari
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Luigino Calzetta
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Giovanna Pelà
- Department of Medicine and Surgery, University of Parma, Parma, Italy
- Cardio-Thoracic and Vascular Department, University Hospital of Parma, Parma, Italy
- Department of General and Specialistic Medicine, University Hospital of Parma, Parma, Italy
| | - Alfredo Chetta
- Department of Medicine and Surgery, University of Parma, Parma, Italy
- Cardio-Thoracic and Vascular Department, University Hospital of Parma, Parma, Italy
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Domínguez-Martín C, Cano A, Díez-Monge N. Clinical performance of spirometry and respiratory oscillometry for prediction of severe exacerbations in schoolchildren with asthma. An Pediatr (Barc) 2023:S2341-2879(23)00109-6. [PMID: 37246048 DOI: 10.1016/j.anpede.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/04/2023] [Indexed: 05/30/2023] Open
Abstract
OBJECTIVE To determine the performance of spirometry and respiratory oscillometry (RO) in the prediction of severe asthma exacerbations (SAEs) in children. METHODS In a prospective study, 148 children (age 6-14 years) with asthma were assessed with RO, spirometry and a bronchodilator (BD) test. Based on the findings of spirometry and the BD test, they were classified into three phenotypes: air trapping (AT), airflow limitation (AFL) and normal. Twelve weeks later, they were re-evaluated in relation to the occurrence of SAEs. We analysed the performance of RO, spirometry and AT/AFL phenotypes for prediction of SAEs by means of positive and negative likelihood ratios, ROC curves with the corresponding areas under the curve (AUCs) and a multivariate analysis adjusted for potential confounders. RESULTS During the follow-up, 7.4% of patients had SAEs, and there were differences between phenotypes (normal, 2.4%; AFL, 17.9%; AT, 22.2%, P = .005). The best AUC corresponded to the forced expiratory flow between 25% and 75% of vital capacity (FEF25-75): 0.787; 95% confidence interval, 0.600-0.973. Other significant AUCs were those for the reactance area (AX), forced expiratory volume in the first second (FEV1), the post-BD change in forced vital capacity (FVC), and the FEV1/FVC ratio. All of the variables had a low sensitivity for prediction of SAEs. The AT phenotype had the best specificity (93.8%; 95% CI, 87.9-97.0), but the positive and negative likelihood ratios were both significant only for the FEF25-75. In the multivariate analysis, only some spirometry parameters were significative for prediction of SAEs (AT phenotype, FEF25-75 and FEV1/FVC). CONCLUSIONS Spirometry performed better than RO for prediction of SAEs in the medium term in schoolchildren with asthma.
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Affiliation(s)
- Clara Domínguez-Martín
- Servicio de Pediatría, Hospital Universitario Río Hortega, Valladolid, Spain; Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain
| | - Alfredo Cano
- Servicio de Pediatría, Hospital Universitario Río Hortega, Valladolid, Spain; Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain.
| | - Nuria Díez-Monge
- Servicio de Pediatría, Hospital Universitario Río Hortega, Valladolid, Spain; Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain
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Petersson Sjögren M, Kåredal M, Broberg K, Assarsson E, Thuresson S, Dierschke K, Hedmer M, Rissler J, Wollmer P, Löndahl J. Sensitive methods for assessment of lung health in welders and controls. Respir Med 2023; 212:107244. [PMID: 37062499 DOI: 10.1016/j.rmed.2023.107244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/18/2023]
Abstract
BACKGROUND Welders are exposed to gas and particle emissions that can cause severe lung disease, such as chronic obstructive pulmonary disease (COPD), a leading cause of mortality and morbidity worldwide. It is hard to detect COPD early and therefore mitigating measures may be delayed. The aim of this study was to investigate lung health in welders and evaluate new sensitive methods with potential to assess early onset pulmonary changes in occupational settings. METHODS This study assessed the lung health and symptoms in active welders (n = 28) and controls (n = 17). Lung measurements were performed with standard spirometry and new methods: airspace dimension assessment (AiDA), oscillometry, blood serum biomarkers (club cell secretory protein 16, surfactant protein D, matrix metalloproteinases, fibroblast, hepatocyte growth factor, interleukins), and one urine biomarker (desmosine). RESULTS According to spirometry measurements, all participants had normal lung function. However, prevalence of cough was significantly higher among welders compared with controls and lung changes were found in welders with the novel methods. Welders had significantly higher respiratory system resistance assessed with oscillometry, serum levels of metalloproteinases 9 and hepatocyte growth factor, compared with controls. Airspace dimensions were on average higher among welders compared with controls, but the difference was not significant. The number of welding years correlated with decreased respiratory system reactance and increased serum levels of matrix metalloproteinases 9, interleukin 6, and hepatocyte growth factor. Airspace dimension assessment indices significantly correlated with increasing levels of inflammatory markers and matrix metalloproteinases. CONCLUSIONS This study indicated the potential to use new and more sensitive methods for identification of changes in lungs when standard spirometry failed to do so.
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Affiliation(s)
- Madeleine Petersson Sjögren
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden
| | - Monica Kåredal
- NanoLund, Lund, Sweden; Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Occupational and Environmental Medicine, Region Skåne, Lund, Sweden
| | - Karin Broberg
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Eva Assarsson
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Sara Thuresson
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden
| | - Katrin Dierschke
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Occupational and Environmental Medicine, Region Skåne, Lund, Sweden
| | - Maria Hedmer
- NanoLund, Lund, Sweden; Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Occupational and Environmental Medicine, Region Skåne, Lund, Sweden
| | - Jenny Rissler
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden; RISE Research Institutes of Sweden, Borås, Sweden
| | - Per Wollmer
- Department of Translational Medicine, Clinical Physiology and Nuclear Medicine, Lund University, Malmö, Sweden
| | - Jakob Löndahl
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden.
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Chan R, Duraikannu C, Thouseef MJ, Lipworth B. Impaired Respiratory System Resistance and Reactance Are Associated With Bronchial Wall Thickening in Persistent Asthma. J Allergy Clin Immunol Pract 2023; 11:1459-1462.e3. [PMID: 36639055 DOI: 10.1016/j.jaip.2022.12.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND A recent study demonstrated a significant correlation between bronchial biopsy airway remodeling and quantitative computed tomography looking at bronchial wall thickness. OBJECTIVE To identify clinical associations with bronchial wall thickness in moderate to severe asthma. METHODS Ninety-two respiratory physician-diagnosed Global Initiative for Asthma-defined patients with moderate to severe asthma were included in this retrospective cohort study. Blinded to all clinical data, 2 senior thoracic radiologists independently measured airway lumen and total airway area at 4 different bronchopulmonary segments using high-resolution computed tomography imaging. We calculated adjusted odds ratios with regard to the association of bronchial wall thickness with spirometry, oscillometry, exacerbations, and nasal polyps. RESULTS The pooled analysis for all 4 bronchopulmonary segments showed that an area under reactance curve greater than or equal to 1.0 kPa/L, an R5-R20 ratio (resistance heterogeneity between 5 and 20 Hz divided by total resistance [R5]) of 25% or more, having 2 or more exacerbations per year, and presence of nasal polyposis exhibited adjusted odds ratios of 3.54 (95% CI, 1.22-10.32), 2.89 (95% CI, 1.03-8.05), 4.17 (95% CI, 1.25-13.90), and 9.85 (95% CI, 2.33-41.74), respectively, in their association with a wall area thickness of 50% or more. These translated into a respective 72%, 65%, 76%, and 90% increased likelihood for a wall area thickness of 50% or more. CONCLUSIONS Bronchial wall thickness is associated with peripheral airways resistance and reactance, severe exacerbations, and nasal polyposis in persistent asthma.
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Affiliation(s)
- Rory Chan
- Scottish Centre for Respiratory Research, School of Medicine, University of Dundee, Ninewells Hospital, Dundee, Scotland, United Kingdom
| | - Chary Duraikannu
- Department of Radiology, Ninewells Hospital, Dundee, Scotland, United Kingdom
| | | | - Brian Lipworth
- Scottish Centre for Respiratory Research, School of Medicine, University of Dundee, Ninewells Hospital, Dundee, Scotland, United Kingdom.
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Lima JHP, Jorge PPO, Solé D, Wandalsen GF. Impulse oscillometry in children and adolescents with persistent asthma and its correlation with spirometry. Allergol Immunopathol (Madr) 2022; 50:10-6. [PMID: 36545702 DOI: 10.15586/aei.v50iSP3.751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/21/2022] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Asthma is one of the most common chronic diseases of childhood. Spirometry is the traditional test for assessing lung function, while impulse oscillometrics is an alternative resource that measures the impedance of the respiratory system. OBJECTIVE : To evaluate the pulmonary function of children and adolescents with asthma by impulse oscillometry and correlate the findings with those obtained by spirometry. METHODS A cross-sectional study in which the pulmonary function of asthmatic children and adolescents aged between 6 and 18 years was evaluated, categorized by the level of disease control according to the Asthma Control Test (ACT) or Children Asthma Control Test (C-ACT) into controlled (ACT/C-ACT>19; n = 70) and uncontrolled (ACT/C-ACT ≤ 19; n = 60). RESULTS A total of 130 asthmatic children and adolescents were evaluated (51% were males). There were no significant differences in the parameter values of both tests when patients were divided by the level of asthma control. Altered impulse oscillometry and spirometry were performed in 20 and 25% of the cases, respectively. Changes in impulse oscillometry were more frequent in patients with controlled asthma. R5 (%), X5 (%), and Fres showed moderate correlation with the main spirometric parameters, being stronger between X5 (%) and FEV1/FVC (%) (r: -0,58; P < 0,05) in patients with controlled asthma. Bronchodilator response was observed in a similar number of patients in both exams, but with reasonable agreement. CONCLUSIONS Impulse oscillometry values showed a weak or moderate correlation with spirometry values.
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Donohue P, Love NC, Connolly M, Khurana S, Georas SN. The effects of a deep breathing maneuver on standard airwave oscillometry measurements. Respir Med Res 2022; 83:100985. [PMID: 36563552 DOI: 10.1016/j.resmer.2022.100985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/24/2022] [Accepted: 11/26/2022] [Indexed: 12/12/2022]
Affiliation(s)
- Patrick Donohue
- Division of Pulmonary and Critical Care Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Ave, Rochester, NY 14642, United States.
| | - Nicholas C Love
- Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Ave, Rochester, NY 14642, United States
| | - Margaret Connolly
- Division of Pulmonary and Critical Care Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Ave, Rochester, NY 14642, United States
| | - Sandhya Khurana
- Division of Pulmonary and Critical Care Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Ave, Rochester, NY 14642, United States; Mary Parkes Center for Asthma, Allergy & Pulmonary Care, 400 Red Creek Drive, Suite 110, Rochester, NY 14623, United States
| | - Steve N Georas
- Division of Pulmonary and Critical Care Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Ave, Rochester, NY 14642, United States; Mary Parkes Center for Asthma, Allergy & Pulmonary Care, 400 Red Creek Drive, Suite 110, Rochester, NY 14623, United States
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Navarro I, Summers S, Rishniw M, Quimby J. Cross-sectional survey of non-invasive indirect blood pressure measurement practices in cats by veterinarians. J Feline Med Surg 2022; 24:1195-1202. [PMID: 35109690 PMCID: PMC10812353 DOI: 10.1177/1098612x211067015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/28/2021] [Indexed: 12/31/2022]
Abstract
OBJECTIVES This survey of small animal veterinarians endeavored to: (1) determine current methods of indirect blood pressure measurement; (2) detail techniques used to reduce situational hypertension; and (3) better understand the obstacles to performing blood pressure measurement in cats. METHODS An online survey was produced and circulated to members of the Veterinary Information Network. A total of 733 veterinarians who saw cats in their practice and had access to at least one indirect blood pressure device completed the entirety of the survey. RESULTS Ninety-six percent (703/733) of veterinarians who completed the survey reported measuring indirect blood pressure in cats in their practice, with veterinary technicians conducting most (600/703; 85.3%) of these measurements. Few veterinarians (30/733; 4.1%) did not measure blood pressure, with these veterinarians citing several obstacles including: difficulty interpreting results with the occurrence of fear, anxiety and stress in cats (20/30; 66.7%); difficulty performing measurements in cats (17/30; 56.7%); and technical staff being uncomfortable performing measurements (12/30; 40.0%). Most veterinarians (300/435; 69.0%) in this survey preferred an ultrasonic Doppler flow detector with sphygmomanometry, with many (272/300; 90.7%) perceiving that the results obtained with this device were more trustworthy compared with results obtained with oscillometry. Ninety percent (633/703) of veterinarians employed techniques to reduce situational hypertension in cats. Techniques perceived to be most helpful among veterinarians included: using a quiet location (454/633; 71.7%); minimizing restraint (316/633; 49.9%); performing blood pressure prior to other procedures (eg, phlebotomy, cystocentesis) (302/633; 47.7%); avoiding other animals (219/633; 34.6%); and allowing time for acclimation (167/633; 26.4%). CONCLUSIONS AND RELEVANCE This survey study of veterinarians helps clarify obstacles to routine blood pressure measurement in conscious cats. Veterinarians reported several strategies that they felt reduced situational hypertension in cats. The data inform modifications of techniques to increase the frequency and perceived reliability of blood pressure measurement in at-risk cats.
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Robinson PD, Salimi F, Cowie CT, Clifford S, King GG, Thamrin C, Hardaker K, Mazaheri M, Morawska L, Toelle BG, Marks GB. Ultrafine particle exposure and biomarkers of effect on small airways in children. Environ Res 2022; 214:113860. [PMID: 35820650 DOI: 10.1016/j.envres.2022.113860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 07/03/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
The small size and large surface area of ultrafine particles (UFP) enhance their ability to deposit in the lung periphery and their reactivity. The Ultrafine Particles from Traffic Emissions and Children's Health (UPTECH) cross-sectional study was conducted in 8-11-year-old schoolchildren attending 25 primary (elementary) schools, randomly selected from the Brisbane Metropolitan Area, Queensland, Australia. Main study findings outlined indirect evidence of distal airway deposition (raised C reactive protein) but as yet, there is no direct evidence in the literature of effects of UFP exposure on peripheral airway function. We present further UPTECH study data from two sensitive peripheral airway function tests, Oscillometry and Multiple Breath Nitrogen Washout (MBNW), performed in 577 and 627 children (88% and 96% of UPTECH study cohort) respectively: mean(SD) age 10.1(0.9) years, 46% male, with 50% atopy and 14% current asthma. Bayesian generalised linear mixed effects regression models were used to estimate the effect of UFP particle number count (PNC) exposure on key oscillometry (airway resistance, (Rrs), and reactance, (Xrs)) and MBNW (lung clearance index, (LCI) and functional residual capacity, (FRC)) indices. We adjusted for age, sex, and height, and potential confounders including socio-economic disadvantage, PM2.5 and NO2 exposure. All models contained an interaction term between UFP PNC exposure and atopy, allowing estimation of the effect of exposure on non-atopic and atopic students. Increasing UFP PNC was associated with greater lung stiffness as evidenced by a decrease in Xrs [mean (95% credible interval) -1.63 (-3.36 to -0.05)%] per 1000#.cm-3]. It was also associated with greater lung stiffness (decrease in Xrs) in atopic subjects across all models [mean change ranging from -2.06 to -2.40% per 1000#.cm-3]. A paradoxical positive effect was observed for Rrs across all models [mean change ranging from -1.55 to -1.70% per 1000#.cm-3] (decreases in Rrs indicating an increase in airway calibre), which was present for both atopic and non-atopic subjects. No effects on MBNW indices were observed. In conclusion, a modest detrimental effect of UFP on peripheral airway function among atopic subjects, as assessed by respiratory system reactance, was observed extending the main UPTECH study findings which reported a positive association with a biomarker for systemic inflammation, C-reactive protein (CRP). Further studies are warranted to explore the pathophysiological mechanisms underlying increased respiratory stiffness, and whether it persists through to adolescence and adulthood.
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Affiliation(s)
- Paul D Robinson
- The Children's Hospital at Westmead, Sydney, Australia; Airway Physiology and Imaging, Woolcock Institute of Medical Research, University of Sydney, Australia; University of Sydney, Sydney, Australia
| | - Farhad Salimi
- University of Sydney, Sydney, Australia; Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia; Centre for Air Pollution, Energy and Health Research (CAR), Australia
| | - Christine T Cowie
- Centre for Air Pollution, Energy and Health Research (CAR), Australia; Respiratory and Environmental Epidemiology, Woolcock Institute of Medical Research, University of Sydney, Australia; South Western Sydney Clinical Campus, University of New South Wales, Australia; Ingham Institute of Applied Medical Research, Sydney, Australia
| | - Samuel Clifford
- Centre for Air Pollution, Energy and Health Research (CAR), Australia; London School of Hygiene and Tropical Medicine, London, UK; International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Australia
| | - Gregory G King
- Airway Physiology and Imaging, Woolcock Institute of Medical Research, University of Sydney, Australia; University of Sydney, Sydney, Australia
| | - Cindy Thamrin
- Airway Physiology and Imaging, Woolcock Institute of Medical Research, University of Sydney, Australia; University of Sydney, Sydney, Australia
| | - Kate Hardaker
- Airway Physiology and Imaging, Woolcock Institute of Medical Research, University of Sydney, Australia; University of Sydney, Sydney, Australia
| | - Mandana Mazaheri
- Centre for Air Pollution, Energy and Health Research (CAR), Australia; Department of Planning, Industry and the Environment, Sydney, Australia
| | - Lidia Morawska
- Centre for Air Pollution, Energy and Health Research (CAR), Australia; International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Australia
| | - Brett G Toelle
- University of Sydney, Sydney, Australia; Respiratory and Environmental Epidemiology, Woolcock Institute of Medical Research, University of Sydney, Australia; Sydney Local Health District, Sydney, Australia.
| | - Guy B Marks
- Centre for Air Pollution, Energy and Health Research (CAR), Australia; Respiratory and Environmental Epidemiology, Woolcock Institute of Medical Research, University of Sydney, Australia; South Western Sydney Clinical Campus, University of New South Wales, Australia; Ingham Institute of Applied Medical Research, Sydney, Australia
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19
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Cruz AF, Herrmann J, Carvalho CRR, Kaczka DW. A comparison of endotracheal tube compensation techniques for the measurement of respiratory mechanical impedance at low frequencies. J Clin Monit Comput 2022; 36:1461-1477. [PMID: 34910285 PMCID: PMC9198108 DOI: 10.1007/s10877-021-00788-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 12/01/2021] [Indexed: 11/29/2022]
Abstract
Measurement of respiratory impedance ([Formula: see text]) in intubated patients requires accurate compensation for pressure losses across the endotracheal tube (ETT). In this study, we compared time-domain (TD), frequency-domain (FD) and combined time-/frequency-domain (FT) methods for ETT compensation. We measured total impedance ([Formula: see text]) of a test lung in series with three different ETT sizes, as well as in three intubated porcine subjects. Pressure measurement at the distal end of the ETT was used to determine the true [Formula: see text]. For TD compensation, pressure distal to the ETT was obtained based on its resistive and inertial properties, and the corresponding [Formula: see text] was estimated. For FD compensation, impedance of the isolated ETT was obtained from oscillatory flow and pressure waveforms, and then subtracted from [Formula: see text]. For TF compensation, the nonlinear resistive properties of the ETT were subtracted from the proximal pressure measurement, from which the linear resistive and inertial ETT properties were removed in the frequency-domain to obtain [Formula: see text]. The relative root mean square error between the actual and estimated [Formula: see text] ([Formula: see text]) showed that TD compensation yielded the least accurate estimates of [Formula: see text] for the in vitro experiments, with small deviations observed at higher frequencies. The FD and TF compensations yielded estimates of [Formula: see text] with similar accuracies. For the porcine subjects, no significant differences were observed in [Formula: see text] across compensation methods. FD and TF compensation of the ETT may allow for accurate oscillometric estimates of [Formula: see text] in intubated subjects, while avoiding the difficulties associated with direct tracheal pressure measurement.
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Affiliation(s)
- Andrea F Cruz
- Laboratorio de Pneumologia LIM-09, Disciplina de Pneumologia, Heart Institute (Incor), Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
- Department of Anesthesia, University of Iowa, Iowa City, IA, USA
| | - Jacob Herrmann
- Department of Anesthesia, University of Iowa, Iowa City, IA, USA
- Roy J. Carver Department of Biomedical Engineering, University of Iowa, Iowa City, IA, USA
| | - Carlos R R Carvalho
- Laboratorio de Pneumologia LIM-09, Disciplina de Pneumologia, Heart Institute (Incor), Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - David W Kaczka
- Department of Anesthesia, University of Iowa, Iowa City, IA, USA.
- Roy J. Carver Department of Biomedical Engineering, University of Iowa, Iowa City, IA, USA.
- Department of Radiology, University of Iowa, Iowa City, IA, USA.
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Iliaz S, Yunisova G, Cakmak OO, Celebi O, Bulus E, Duman A, Bayraktaroglu M, Oflazer P. The clinical use of impulse oscillometry in neuromuscular diseases. Respir Med 2022; 200:106931. [PMID: 35858508 DOI: 10.1016/j.rmed.2022.106931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/27/2022] [Accepted: 07/05/2022] [Indexed: 12/01/2022]
Abstract
BACKGROUND The patients with neuromuscular diseases (NMD) are very fragile and it is hard to evaluate respiratory involvement of the primary disease in this group. Therefore, our study aimed to reveal the relationship between pulmonary function tests (PFT) and impulse oscillometry (IOS) and their correlation with respiratory clinical findings in NMD. MATERIAL AND METHODS A total of 86 consecutive patients with NMD were included. The clinical findings of respiratory involvement, PFT, and IOS results of the patients were analyzed. RESULTS Forty patients out of 86 were female. There were 29 patients with amyotrophic lateral sclerosis, four patients with myasthenia gravis, and 53 patients with muscular dystrophies/myopathies. According to the PFT results, 47 patients had restrictive PFT. However, there was no difference in IOS parameters when we compared the patients according to restrictions in PFT. A positive correlation was found with FVC %pred and X5. PEF %pred values were positively correlated with X10, X15, and X20, and negatively correlated with AX and R5-20. The patients with worse swallowing capability had increased Rrs levels, and more negative Xrs levels. The shortness of breath led to lower FEV1 %pred., higher R5, AX and R5-20, and also more negative X10, X15, and X35. CONCLUSION Clinically reported dysphagia, a decreased capability of coughing, and shortness of breath in patients with NMD make Rrs increase in general, but Xrs parameters, which mainly express rib cage elasticity, turn more negative. In patients with NMD, IOS monitoring may help in evaluating the regression in respiratory functions, however, future studies are needed to understand more.
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Affiliation(s)
- Sinem Iliaz
- Memorial Bahcelievler Hospital, Department of Pulmonology, Istanbul, Turkey; Koc University Hospital, Department of Pulmonary Medicine, Istanbul, Turkey.
| | - Gulshan Yunisova
- Koc University Hospital, Department of Neurology, Istanbul, Turkey.
| | - Ozgur Oztop Cakmak
- Koc University School of Medicine, Department of Neurology, Istanbul, Turkey.
| | - Ozlem Celebi
- Koc University Hospital, Department of Neurology, Istanbul, Turkey.
| | - Eser Bulus
- Koc University Hospital, Department of Neurology, Istanbul, Turkey.
| | - Arda Duman
- Koc University Hospital, Department of Neurology, Istanbul, Turkey.
| | - Mesut Bayraktaroglu
- Memorial Bahcelievler Hospital, Department of Pulmonology, Istanbul, Turkey.
| | - Piraye Oflazer
- Koc University School of Medicine, Department of Neurology, Istanbul, Turkey.
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21
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Chan R, Lipworth B. Forced Vital Capacity and Low Frequency Reactance Area Measurements Are Associated with Asthma Control and Exacerbations. Lung 2022. [PMID: 35662363 DOI: 10.1007/s00408-022-00542-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/17/2022] [Indexed: 11/22/2022]
Abstract
Introduction Forced vital capacity (FVC) is often preserved in severe asthma unless there is evidence of either airway remodelling or air trapping. Area under the reactance curve (AX) can be used to assess small airways dysfunction related lung stiffness and is related to disease control in severe asthma. Methods We explore if there may be a potential synergistic interaction between FVC and AX in terms of impaired asthma control as ACQ and exacerbations requiring oral corticosteroids (OCS). We pragmatically defined < 100% and ≥ 1.0 kPa/L/s as impaired FVC or AX, respectively. Results Patients with combined impairment of FVC and AX had significantly worse asthma control as higher ACQ, more severe exacerbations requiring OCS and worse spirometry (FEV1 and FEF25–75) than those with impaired FVC but preserved AX. Conclusion This in turn supports using both spirometry and oscillometry to characterise airway physiology more comprehensively in patients with more severe asthma.
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22
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Cottee AM, Seccombe LM, Thamrin C, King GG, Peters MJ, Farah CS. Oscillometry and Asthma Control in Patients With and Without Fixed Airflow Obstruction. J Allergy Clin Immunol Pract 2022; 10:1260-1267.e1. [PMID: 34979333 DOI: 10.1016/j.jaip.2021.12.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND Asthma is defined by the presence of reversible airflow limitation, yet persistently abnormal spirometry may develop despite appropriate asthma treatment. Fixed airflow obstruction (FAO) describes abnormal postbronchodilator spirometry that is associated with greater symptom burden and disease severity. Respiratory oscillometry measures the mechanics of the entire airway tree, including peripheral airway changes that have been shown to influence asthma symptoms. OBJECTIVE To evaluate the relationship between abnormal oscillometry following bronchodilator and symptom control in adults with asthma. METHODS A prospective cohort of patients with asthma attending an airways clinic completed oscillometry (resistance and reactance), spirometry, and the Asthma Control Test. Postbronchodilator lung function below the lower limit of normal was considered abnormal. Spirometric FAO was defined as FEV1/forced vital capacity below the lower limit of normal. Spearman's rank coefficient and multiple linear regression were performed to assess associations of lung function parameters with Asthma Control Test. The discriminative ability of abnormal lung function to identify poor asthma control was determined using Cohen's kappa. RESULTS Ninety patients with asthma were included; 48% had spirometric FAO. Only reactance parameters, not spirometry, significantly related to (rs ≥ 0.315; P < .05) and identified asthma control (r2 = 0.236; P < .001). Lung function was more strongly associated with asthma control in patients with FAO compared with those without. Abnormal oscillometry identified an additional 24% of patients with poor asthma control as compared with spirometric FAO. CONCLUSIONS Reactance related to asthma control, independently of spirometric FAO. Abnormal postbronchodilator reactance identified more patients with poor asthma control compared with spirometry. These findings confirm that oscillometry is a relevant lung function test in the clinical assessment of asthma.
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23
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Lim SH, Kim SH. Blood pressure measurements and hypertension in infants, children, and adolescents: from the postmercury to mobile devices. Clin Exp Pediatr 2022; 65:73-80. [PMID: 34530519 PMCID: PMC8841968 DOI: 10.3345/cep.2021.00143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 08/19/2021] [Indexed: 11/27/2022] Open
Abstract
A mercury sphygmomanometer (MS) has been the gold standard for pediatric blood pressure (BP) measurements, and diagnosing hypertension is critical. However, because of environmental issues, other alternatives are needed. Noninvasive BP measurement devices are largely divided into auscultatory and oscillometric types. The aneroid sphygmomanometer, the currently used auscultatory method, is inferior to MS in terms of limitations such as validation and regular calibration and difficult to apply to infants, in whom Korotkoff sounds are not audible. The oscillometric method uses an automatic device that eliminates errors caused by human observers and has the advantage of being easy to use; however, owing to its measurement accuracy issues, the development of an international validation protocol for children is important. The hybrid method, which combines the auscultatory and electronic methods, solves some of these problems by eliminating the observer bias of terminal digit preference while maintaining measurement accuracy; however, the auscultatory method remains limited. As the age-related characteristics of the pediatric group are heterogeneous, it is necessary to reconsider the appropriate BP measurement method suitable for this indication. In addition, the mobile application-based BP measurement market is growing rapidly with the development of smartphone applications. Although more research is still needed on their accuracy, many experts expect that mobile application-based BP measurement will effectively reduce medical costs due to increased ease of access and early BP management.
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Affiliation(s)
- Seon Hee Lim
- Department of Pediatrics, Uijeongbu Eulji Medical Center, Uijeongbu, Korea
| | - Seong Heon Kim
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
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Chanachon PN, Jotikasthira W, Kiewngam P, Sawatchai A, Kanchongkittiphon W, Manuyakorn W. Association of Dyslipidemia and Respiratory Resistance Assessed by the Forced Oscillation Technique in Asthmatic Children. Lung 2022. [PMID: 35064334 DOI: 10.1007/s00408-021-00502-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 12/06/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE This study aimed to evaluate the associations between dyslipidemia and pulmonary function parameters assessed by spirometry and the forced oscillation technique in asthmatic children. METHODS Asthmatic children (5-18 years old) had fasting serum lipid profiles including low-density lipoprotein cholesterol (LDL-C), total cholesterol (TC), triglyceride (TG), and high-density lipoprotein cholesterol (HDL-C) concentrations, and C-reactive protein (CRP) measured. Pulmonary function tests were assessed by spirometry and the forced oscillation technique (FOT). RESULTS One hundred forty-one asthmatic children were enrolled with a mean (SD) age of 11.82 (3.38) years. Eighty-eight (62.4%) children were boys, 64 (45.4%) had dyslipidemia, and 20 (14.2%) were obese. Among the children with dyslipidemia, a high LDL-C concentration (65.6%) was the most common form of dyslipidemia, followed by high TC (57.8%), high TG (35.9%), and low HDL-C concentrations (15.6%). Multivariable analysis showed significant associations between HDL-C concentrations and respiratory resistance at 5 Hz (R5) and respiratory resistance at 20 Hz (R20), and TC concentrations were modestly associated with reactance at 5 Hz (X5), the frequency of resonance (Fres), and the area of reactance (ALX). Asthmatic children who had high LDL-C concentrations had a significantly higher expiratory phase R5, whole breath R20, and expiratory phase R20 than those in children with normal LDL-C concentrations. CONCLUSION This study suggests an association of blood cholesterol, especially HDL-C and LDL-C, and respiratory resistance measured by the FOT, irrespective of the obesity status. An intervention for improving LDL-C and HDL-C concentrations may be beneficial on lung function parameters in asthmatic children. CLINICAL TRIAL REGISTRATION TCTR20200305005; date of registration: 03-04-2020 (retrospectively registered).
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Benmira AM, Moranne O, Prelipcean C, Pambrun E, Dauzat M, Demattei C, Pérez-Martin A. Direct Determination rather than Oscillometric Estimation of Systolic Blood Pressure in Patients with Severe Chronic Kidney Disease. Am J Nephrol 2022; 53:41-49. [PMID: 35021175 DOI: 10.1159/000520996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 11/16/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Although arterial hypertension is a major concern in patients with chronic kidney disease (CKD), obtaining accurate systolic blood pressure (SBP) measurement is challenging in this population for whom automatic oscillometric devices may yield erroneous results. METHODS This cross-sectional study was conducted in 89 patients with stages 4, 5, and 5D CKD, for whom we compared SBP values obtained by the recently described systolic foot-to-apex time interval (SFATI) technique which provides direct SBP determination, the standard technique (Korotkoff sounds), and oscillometry. We investigated the effects of age, sex, diabetes, CKD stage, and pulse pressure to explain measurement errors defined as biases or misclassification relative to the SBP thresholds of 110-130-mm Hg. RESULTS All 3 techniques showed satisfactory reproducibility for SBP measurement (CCC > 0.84 and >0.91, respectively, in dialyzed and nondialyzed patients). The mean ± SD from SBP as determined via Korotkoff sounds was 1.7 ± 4.6 mm Hg for SFATI (CCC = 0.98) and 5.9 ± 9.3 mm Hg for oscillometry (CCC = 0.88). Referring to the 110-130-mm Hg SBP range outside which treatment prescription or adaptation is recommended for CKD patients, SFATI underestimated SBP in 3 patients and overestimated it in 1, whereas oscillometry underestimated SBP in 12 patients and overestimated it in 3. Higher pulse pressure was the main explanatory factor for measurement and classification errors. DISCUSSION/CONCLUSION SFATI provides accurate SBP measurements in patients with severe CKD and paves the way for the standardization of automated noninvasive blood pressure measurement devices. Before prescribing or adjusting antihypertensive therapy, physicians should be aware of the risk of misclassification when using oscillometry.
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Affiliation(s)
- Amir M Benmira
- Vascular Medicine, Nimes University Hospital, Nimes, France
- IDESP, INSERM & Montpellier University, Montpellier, France
| | - Olivier Moranne
- IDESP, INSERM & Montpellier University, Montpellier, France,
- Nephology - Dialysis - Apheresis, Nimes University Hospital, Nimes, France,
| | - Camelia Prelipcean
- Nephology - Dialysis - Apheresis, Nimes University Hospital, Nimes, France
| | - Emilie Pambrun
- Nephology - Dialysis - Apheresis, Nimes University Hospital, Nimes, France
| | - Michel Dauzat
- Vascular Medicine, Nimes University Hospital, Nimes, France
- EA2992, Montpellier University, Montpellier, France
| | | | - Antonia Pérez-Martin
- Vascular Medicine, Nimes University Hospital, Nimes, France
- IDESP, INSERM & Montpellier University, Montpellier, France
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Abstract
The small airways dysfunction (SAD) asthma phenotype is characterised by narrowing of airways < 2 mm in diameter between generations 8 and 23 of the bronchial tree. Recently, this has become particularly relevant as measurements of small airways using airway oscillometry for example, are strong determinants of asthma control and exacerbations in moderate-to-severe asthma. The small airways can be assessed using spirometry as forced expiratory flow rate between 25 and 75% of forced vital capacity (FEF25-75) and has been deemed more accurate in detecting small airways dysfunction than forced expiratory volume in 1 s (FEV1). Oscillometry as the heterogeneity in resistance between 5 and 20 Hz (R5-R20), low frequency reactance at 5 Hz (X5) or area under the reactance curve between 5 Hz and the resonant frequency can also be used to assess the small airways. The small airways can also be assessed using the multiple breath nitrogen washout (MBNW) test giving rise to values including functional residual capacity, lung clearance index and ventilation distribution heterogeneity in the conducting (Scond) and the acinar (Sacin) airways. The ATLANTIS group showed that the prevalence of small airways disease in asthma defined on FEF25-75, oscillometry and MBNW all increased with progressive GINA asthma disease stages. As opposed to topical inhaler therapy that might not adequately penetrate the small airways, it is perhaps more intuitive that systemic anti-inflammatory therapy with biologics targeting downstream cytokines and upstream epithelial anti-alarmins may offer a promising solution to SAD. Here we therefore aim to appraise the available evidence for the effect of anti-IgE, anti-IL5 (Rα), anti-IL4Rα, anti-TSLP and anti-IL33 biologics on small airways disease in patients with severe asthma.
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Affiliation(s)
- Rory Chan
- Scottish Centre for Respiratory Research, Ninewells Hospital and Medical School, University of Dundee, Dundee, Scotland, DD1 9SY, UK
| | - Brian J Lipworth
- Scottish Centre for Respiratory Research, Ninewells Hospital and Medical School, University of Dundee, Dundee, Scotland, DD1 9SY, UK.
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Dutta A, Alaka M, Ibigbami T, Adepoju D, Adekunle S, Olamijulo J, Adedokun B, Deji-Abiodun O, Chartier R, Ojengbede O, Olopade CO. Impact of prenatal and postnatal household air pollution exposure on lung function of 2-year old Nigerian children by oscillometry. Sci Total Environ 2021; 755:143419. [PMID: 33187696 DOI: 10.1016/j.scitotenv.2020.143419] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/24/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
RATIONALE Lung function is adversely affected by exposure to household air pollution (HAP). Studies investigating the impact of prenatal and postnatal HAP exposure on early childhood lung development are limited, especially from Sub-Saharan Africa. OBJECTIVE We used oscillometry to investigate the impact on lung function of prenatal and postnatal HAP exposure of children born to Nigerian women who participated in a randomized controlled cookstove intervention trial. METHODS We performed oscillometric measurements (R: airway resistance; X: airway reactance; Fres: resonant frequency; AX: reactance area) in 223 children starting at age of 2 years (ethanol stove, n = 113; firewood/kerosene, n = 110). Personal exposure monitoring assessed mothers' prenatal exposure to particulate matter less than 2.5 μm in aerodynamic diameter (PM2.5). Postnatal HAP exposure was measured by determining household PM2.5 levels. We employed linear regression analysis to examine the association of prenatal and postnatal HAP exposures with children's lung function. Models were adjusted for age, gender, weight, height, group (intervention or control), birthweight and gestational age. RESULTS Mean age of the children was 2.9 years (standard deviation = 0.3); 120 were boys (53.8%) and 103 were girls (46.2%). Higher postnatal PM2.5 exposures were significantly associated with higher airway reactance at 5 Hz (X5 Hz; p = 0.04) in adjusted models. There were no significant associations between prenatal or postnatal PM2.5 exposure levels and other oscillometry parameters in adjusted regression analysis. CONCLUSIONS This is the first study to use oscillometry to explore the relationship between HAP exposure and lung function in children as young as 2 years. The findings provide some evidence that increased postnatal HAP exposure may result in poorer lung function in children, although larger studies are needed to confirm observed results. This study indicates that oscillometry is a low-cost and effective method to determine lung function in early childhood.
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Affiliation(s)
- Anindita Dutta
- Department of Medicine and Center for Global Health, University of Chicago, 5841 S. Maryland Avenue, MC 2021, Chicago, IL 60637, USA
| | - Mariam Alaka
- Pritzker School of Medicine, University of Chicago, 5841 S. Maryland Avenue, MC 6076, Chicago, IL 60637, USA
| | - Tope Ibigbami
- Healthy Life for All Foundation, House 38, University College Hospital, Ibadan, Nigeria
| | - Dayo Adepoju
- Healthy Life for All Foundation, House 38, University College Hospital, Ibadan, Nigeria
| | - Samuel Adekunle
- Healthy Life for All Foundation, House 38, University College Hospital, Ibadan, Nigeria
| | - John Olamijulo
- Healthy Life for All Foundation, House 38, University College Hospital, Ibadan, Nigeria
| | - Babatunde Adedokun
- Department of Medicine and Center for Global Health, University of Chicago, 5841 S. Maryland Avenue, MC 2021, Chicago, IL 60637, USA
| | - Oluwafunmilade Deji-Abiodun
- Department of Medicine and Center for Global Health, University of Chicago, 5841 S. Maryland Avenue, MC 2021, Chicago, IL 60637, USA
| | | | - Oladosu Ojengbede
- Department of Obstetrics and Gynecology, University of Ibadan, Ibadan, Nigeria
| | - Christopher O Olopade
- Department of Medicine and Center for Global Health, University of Chicago, 5841 S. Maryland Avenue, MC 2021, Chicago, IL 60637, USA; Pritzker School of Medicine, University of Chicago, 5841 S. Maryland Avenue, MC 6076, Chicago, IL 60637, USA.
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Dean J, Panainte C, Khan N, Singh D. The TRIFLOW study: a randomised, cross-over study evaluating the effects of extrafine beclometasone/formoterol/glycopyrronium on gas trapping in COPD. Respir Res 2020; 21:323. [PMID: 33298062 PMCID: PMC7727250 DOI: 10.1186/s12931-020-01589-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 11/29/2020] [Indexed: 12/26/2022] Open
Abstract
Background The effects of triple therapy on gas trapping in COPD are not fully understood. We evaluated the effects of the long acting bronchodilator components of the extrafine single inhaler triple therapy beclometasone dipropionate/formoterol/glycopyrronium (BDP/F/G) pMDI on gas trapping. Methods This open-label, randomised, single centre, 2-way cross-over study recruited 23 COPD patients taking inhaled corticosteroid combination treatments and with residual volume (RV) > 120% predicted at screening. Inhaled BDP was taken during run-in and washout periods. Baseline lung function (spirometry, lung volumes, oscillometry) was measured over 12 h prior to randomisation to BDP/F/G or BDP/F for 5 days followed by washout and crossover. Lung function was measured prior to dosing on day 1 and for 12 h post-dose on day 5. Results Co-primary endpoint analysis: BDP/F/G had a greater effect than BDP/F on FEV1 area under the curve over 12 h (AUC0–12) (mean difference 104 mls, p = 0.0071) and RV AUC0–12 (mean difference − 163 mls, p = 0.0028). Oscillometry measurements showed a greater effect of BDP/F/G on the difference between resistance at 5 and 20 Hz (R5–R20) AUC0–12, which measures small airway resistance (mean difference − 0.045 kPa/L/s, p = 0.0002). Comparison of BDP/F with the baseline measurements (BDP alone) showed that F increased FEV1 AUC0–12 (mean difference 227 mls) and improved RV AUC0–12 (mean difference − 558 mls) and R5–R20 AUC0–12 (mean difference − 0.117 kPa/L/s), all p < 0.0001. Conclusions In COPD patients with hyperinflation, the G and F components of extrafine BDP/F/G improved FEV1, RV and small airway function. These long acting bronchodilators target small airway function, thereby improving gas trapping and airflow. Trial registration The study was retrospectively registered at ClinicalTrials.gov on 15th February 2019 (No.: NCT03842904, https://clinicaltrials.gov/ct2/show/NCT03842904).
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Affiliation(s)
- James Dean
- Medicines Evaluation Unit, Southmoor Road, Manchester, M23 9QZ, UK.
| | | | - Naimat Khan
- Medicines Evaluation Unit, Southmoor Road, Manchester, M23 9QZ, UK
| | - Dave Singh
- Medicines Evaluation Unit, Southmoor Road, Manchester, M23 9QZ, UK.,Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester and Manchester University NHS Foundation Trust, Manchester, UK
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Cottini M, Licini A, Lombardi C, Berti A. Prevalence and features of IOS-defined small airway disease across asthma severities. Respir Med 2020; 176:106243. [PMID: 33253974 DOI: 10.1016/j.rmed.2020.106243] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 07/21/2020] [Accepted: 11/16/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Impulse oscillometry (IOS) is a noninvasive method based on the forced oscillation technique able to detect small airway dysfunction (SAD) in asthma. We aimed to analyze the prevalence and the functional features of IOS-defined SAD across the different Global Initiative for Asthma (GINA) steps. METHODS A cross-sectional, single-center study in which 400 consecutive adult patients with physician-diagnosed, community-managed asthma underwent standard spirometry and IOS, and were stratified by stepwise GINA classification. SAD was defined by IOS as a fall in resistance from 5 to 20 Hz [R5-R20]>0.07kPa × s × L-1. RESULTS The prevalence of IOS-defined SAD ranged between 58.3% (GINA step 2) and 78.6% (GINA step 5), without statistically significant difference within GINA steps (p > 0.05 in all comparisons). Isolated SAD (i.e. without proximal airways involvement) was similarly represented across GINA steps 2-4. Peripheral airways resistance (R5-R20) tended to a progressive increase with the worsening of GINA steps, and was significantly higher in steps 4-5 compared to the other steps (p < 0.05). The proportion of patients with FEF25-75%-defined SAD (<60%) was lower than the IOS-defined one in GINA steps 2-4 (p < 0.05). Only non-significant or weak inverse correlations between R5-R20 and FEF25-75% were observed within each GINA step, with the exception of GINA step 5, which showed a strong, inverse correlation (r = -0.80, p = 0.0005). CONCLUSIONS This study shows that first, IOS-defined SAD is overwhelmingly present across asthma severities; second, airways resistance increases with the worsening of GINA steps; and third, SAD may be overlooked by standard spirometry, especially in milder asthma.
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Affiliation(s)
| | - Anita Licini
- Allergy and Pneumology Outpatient Clinic, Bergamo, Italy
| | - Carlo Lombardi
- Departmental Unit of Allergology, Immunology & Pulmonary Diseases, Fondazione Poliambulanza, Brescia, Italy
| | - Alvise Berti
- Santa Chiara Hospital and Department of Cellular, Computational and Integrative Biology - CIBIO, University of Trento, Trento, Italy and Thoracic Disease Research Unit, Mayo Clinic, Rochester, USA.
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Bogatu LI, Turco S, Mischi M, Woerlee P, Bouwman A, Korsten EHHM, Muehlsteff J. A modelling framework for assessment of arterial compliance by fusion of oscillometry and pulse wave velocity information. Comput Methods Programs Biomed 2020; 196:105492. [PMID: 32603986 DOI: 10.1016/j.cmpb.2020.105492] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/29/2020] [Accepted: 04/02/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND AND OBJECTIVES Measurement of arterial compliance is recognized as important for clinical use and for enabling better understanding of circulatory system regulation mechanisms. Estimation of arterial compliance involves either a direct measure of the ratio between arterial volume and pressure changes or an inference from the pulse wave velocity (PWV). In this study we demonstrate an approach to assess arterial compliance by fusion of these two information sources. The approach is based on combining oscillometry as used for blood pressure inference and PWV measurements based on ECG/PPG. Enabling reliable arterial compliance measurements will contribute to the understanding of regulation mechanisms of the arterial tree, possibly establishing arterial compliance as a key measure relevant in hemodynamic monitoring. METHODS A measurement strategy, a physiological model, and a framework based on Bayesian principles are developed for measuring changes in arterial compliance based on combining oscillometry and PWV data. A simulation framework is used to study and validate the algorithm and measurement principle in detail, motivated by previous experimental findings. RESULTS Simulations demonstrate the possibility of inferring arterial compliance via fusion of simultaneously acquired volume/pressure relationships and PWV data. In addition, the simulation framework demonstrates how Bayesian principles can be used to handle low signal - to - noise ratio and partial information loss. CONCLUSIONS The developed simulation framework shows the feasibility of the proposed approach for assessment of arterial compliance by combining multiple data sources. This represents a first step towards integration of arterial compliance measurements in hemodynamic monitoring using existing clinical technology. The Bayesian approach is of particular relevance for such patient monitoring settings, where measurements are repeated frequently, context is relevant, and data is affected by artefacts. In addition, the simulation framework is necessary for future clinical-study design, in order to determine device specifications and the extent to which noise affects the inference process.
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Affiliation(s)
- Laura I Bogatu
- Patient Care and Measurements, Philips Research, Eindhoven, 5656 AE, Netherlands; Biomedical Diagnostics, Eindhoven University of Technology, Eindhoven, 5612 AZ, Netherlands.
| | - Simona Turco
- Biomedical Diagnostics, Eindhoven University of Technology, Eindhoven, 5612 AZ, Netherlands.
| | - Massimo Mischi
- Biomedical Diagnostics, Eindhoven University of Technology, Eindhoven, 5612 AZ, Netherlands.
| | - Pierre Woerlee
- Biomedical Diagnostics, Eindhoven University of Technology, Eindhoven, 5612 AZ, Netherlands.
| | | | | | - Jens Muehlsteff
- Patient Care and Measurements, Philips Research, Eindhoven, 5656 AE, Netherlands.
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Abstract
The determination of arterial blood pressure is a fundamental part of basic cardiovascular monitoring in perioperative, intensive care and emergency medicine. Blood pressure can be measured directly via an arterial catheter, which is the most accurate method. Blood pressure is most commonly monitored using noninvasive intermittent methods with an occluding upper arm cuff. Noninvasive intermittent blood pressure measurements can also be performed either manually using palpation and auscultation or automatically based on an oscillometric algorithm. Furthermore, methods such as the vascular unloading technique with a finger plethysmographic sensor are available for continuous and noninvasive blood pressure monitoring. This article explains the principles of the individual methods, the sources of errors, advantages and disadvantages and discusses the fields of application in the clinical routine.
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Affiliation(s)
- A S Meidert
- Klinik für Anaesthesiologie, Klinikum der Universität München (LMU), Marchioninistr. 15, 81377, München, Deutschland.
| | - J Briegel
- Klinik für Anaesthesiologie, Klinikum der Universität München (LMU), Marchioninistr. 15, 81377, München, Deutschland
| | - B Saugel
- Klinik und Poliklinik für Anästhesiologie, Zentrum für Anästhesiologie und Intensivmedizin, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Deutschland
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Abstract
Hypertension is the leading risk factor for death and disability-adjusted life-years lost globally. Despite this tremendous impact on health, blood pressure measurement and treatment are relatively new to medical practice, with widespread measurement beginning just over 100 years ago. How, in such a short time, did blood pressure become such an integral measurement in medical practice that it is now considered one of the vital signs? Key revelations through Stephen Hales and his horse experiment, Riva-Rocci's modern blood pressure cuff, Korotkoff sounds, and President Roosevelt's death set the stage for discovery. Landmark trials such as the VA Cooperative studies of the 1960s through the recent Systolic Blood Pressure Intervention Trial and Prevention with Mediterranean Diet trials provide the foundation for modern clinical practice. An understanding of the history of hypertension can directly affect current clinical practice and offers unique insights into how the medical community has approached the management of one of the deadliest medical conditions in history.
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Hageman D, van den Houten MML, Pesser N, Gommans LNM, Scheltinga MRM, Teijink JAW. Diagnostic accuracy of automated oscillometric determination of the ankle-brachial index in peripheral artery disease. J Vasc Surg 2020; 73:652-660. [PMID: 32682067 DOI: 10.1016/j.jvs.2020.05.077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 05/22/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Peripheral artery disease (PAD) is underdiagnosed in primary care settings, partly because of limited accuracy of the Doppler ankle-brachial index (ABI). This study aimed to assess the diagnostic accuracy of an automated oscillometric ABI device compared with reference standard vascular laboratory Doppler ABI equipment and to examine the influence of oscillometric errors on performance. METHODS Consecutive patients who were referred to a large general hospital for an ABI measurement were invited to participate. In each patient, the oscillometric analysis was followed by the Doppler analysis. Legs with incompressible ankle arteries were excluded from analysis. ABI values were compared using the Bland-Altman method. Oscillometric errors were defined as the incapacity of the oscillometer to report a value of ABI. A receiver operating characteristic curve was constructed, and the area under the curve was computed. RESULTS A total of 201 patients participated. The Bland-Altman plot showed a mean difference of 0.05 ± 0.12 (limits of agreement, -0.20 to 0.29), representing a small ABI overestimation after oscillometry. Oscillometric errors occurred more commonly in limbs with PAD than in limbs without PAD (28% and 7%, respectively; P < .001). Considering a 0.9 threshold and after oscillometric error exclusion, the oscillometric ABI showed a 74% sensitivity and a 97% specificity for a diagnosis of PAD. When oscillometric errors were considered as abnormal ABIs, sensitivity increased to 86% and specificity was maintained at 95%. The receiver operating characteristic curve showed an area under the curve of 0.96. The best oscillometric ABI cutoff point was 1.00. Using this threshold and when considering oscillometric errors as abnormal ABIs, sensitivity improved to 94% while maintaining specificity at 92%. CONCLUSIONS Oscillometric ABI showed good diagnostic accuracy compared with the reference standard. However, the high incidence of oscillometric errors and the challenges to correctly interpret readings may limit the use of the oscillometric method in PAD diagnosis.
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Affiliation(s)
- David Hageman
- Department of Vascular Surgery, Catharina Hospital, Eindhoven; Department of Epidemiology, CAPHRI School for Public Health and Primary Care, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht
| | - Marijn M L van den Houten
- Department of Vascular Surgery, Catharina Hospital, Eindhoven; Department of Epidemiology, CAPHRI School for Public Health and Primary Care, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht
| | - Niels Pesser
- Department of Vascular Surgery, Catharina Hospital, Eindhoven
| | | | | | - Joep A W Teijink
- Department of Vascular Surgery, Catharina Hospital, Eindhoven; Department of Epidemiology, CAPHRI School for Public Health and Primary Care, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht.
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Chapman DG, King GG, Robinson PD, Farah CS, Thamrin C. The need for physiological phenotyping to develop new drugs for airways disease. Pharmacol Res 2020; 159:105029. [PMID: 32565310 DOI: 10.1016/j.phrs.2020.105029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 06/01/2020] [Accepted: 06/12/2020] [Indexed: 11/25/2022]
Abstract
Asthma and COPD make up the majority of obstructive airways diseases (OADs), which affects ∼11 % of the population. The main drugs used to treat OADs have not changed in the past five decades, with advancements mainly comprising variations on existing treatments. The recent biologics are beneficial to only specific subsets of patients. Part of this may lie in our inability to adequately characterise the tremendous heterogeneity in every aspect of OAD. The field is currently moving towards the concept of personalised medicine, based on a focus on treatable traits that are objective, measurable and modifiable. We propose extending this concept via the use of emerging clinical tools for comprehensive physiological phenotyping. We describe, based on published data, the evidence for the use of functional imaging, gas washout techniques and oscillometry, as well as potential future applications, to more comprehensively assess and predict treatment response in OADs. In this way, we hope to demonstrate how physiological phenotyping tools will improve the way in which drugs are prescribed, but most importantly, will facilitate development of new drugs for OADs.
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Affiliation(s)
- David G Chapman
- Airway Physiology and Imaging Group and Woolcock Emphysema Centre, The Woolcock Institute of Medical Research, The University of Sydney, Glebe NSW 2037, Australia; School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo NSW 2007, Australia.
| | - G G King
- Airway Physiology and Imaging Group and Woolcock Emphysema Centre, The Woolcock Institute of Medical Research, The University of Sydney, Glebe NSW 2037, Australia; Department of Respiratory Medicine, Royal North Shore Hospital, St. Leonards, NSW 2065, Australia; NHMRC Centre of Excellence in Severe Asthma, New Lambton Heights NSW 2305, Australia; Faculty of Medicine and Health Sciences, The University of Sydney, NSW 2006, Australia
| | - Paul D Robinson
- Airway Physiology and Imaging Group and Woolcock Emphysema Centre, The Woolcock Institute of Medical Research, The University of Sydney, Glebe NSW 2037, Australia; Department of Respiratory Medicine, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia; Faculty of Medicine and Health Sciences, The University of Sydney, NSW 2006, Australia
| | - Claude S Farah
- Airway Physiology and Imaging Group and Woolcock Emphysema Centre, The Woolcock Institute of Medical Research, The University of Sydney, Glebe NSW 2037, Australia; Faculty of Medicine and Health Sciences, The University of Sydney, NSW 2006, Australia; Department of Thoracic Medicine, Concord Repatriation General Hospital, Concord, NSW 2137, Australia
| | - Cindy Thamrin
- Airway Physiology and Imaging Group and Woolcock Emphysema Centre, The Woolcock Institute of Medical Research, The University of Sydney, Glebe NSW 2037, Australia; Faculty of Medicine and Health Sciences, The University of Sydney, NSW 2006, Australia
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Kaufmann T, Cox EGM, Wiersema R, Hiemstra B, Eck RJ, Koster G, Scheeren TWL, Keus F, Saugel B, van der Horst ICC. Non-invasive oscillometric versus invasive arterial blood pressure measurements in critically ill patients: A post hoc analysis of a prospective observational study. J Crit Care 2020; 57:118-123. [PMID: 32109843 DOI: 10.1016/j.jcrc.2020.02.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 02/16/2020] [Accepted: 02/21/2020] [Indexed: 02/06/2023]
Abstract
PURPOSE The aim was to compare non-invasive blood pressure measurements with invasive blood pressure measurements in critically ill patients. METHODS Non-invasive blood pressure was measured via automated brachial cuff oscillometry, and simultaneously the radial arterial catheter-derived measurement was recorded as part of a prospective observational study. Measurements of systolic arterial pressure (SAP), diastolic arterial pressure (DAP), and mean arterial pressure (MAP) were compared using Bland-Altman and error grid analyses. RESULTS Paired measurements of blood pressure were available for 736 patients. Observed mean difference (±SD, 95% limits of agreement) between oscillometrically and invasively measured blood pressure was 0.8 mmHg (±15.7 mmHg, -30.2 to 31.7 mmHg) for SAP, -2.9 mmHg (±11.0 mmHg, -24.5 to 18.6 mmHg) for DAP, and -1.0 mmHg (±10.2 mmHg, -21.0 to 18.9 mmHg) for MAP. Error grid analysis showed that the proportions of measurements in risk zones A to E were 78.3%, 20.7%, 1.0%, 0%, and 0.1% for MAP. CONCLUSION Non-invasive blood pressure measurements using brachial cuff oscillometry showed large limits of agreement compared to invasive measurements in critically ill patients. Error grid analysis showed that measurement differences between oscillometry and the arterial catheter would potentially have triggered at least low-risk treatment decisions in one in five patients.
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Affiliation(s)
- Thomas Kaufmann
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
| | - Eline G M Cox
- Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Renske Wiersema
- Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Bart Hiemstra
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands; Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Ruben J Eck
- Department of Internal Medicine, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Geert Koster
- Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Thomas W L Scheeren
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Frederik Keus
- Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Bernd Saugel
- Department of Anesthesiology, Center of Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Outcomes Research Consortium, Cleveland, OH, USA
| | - Iwan C C van der Horst
- Department of Critical Care, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands; Department of Intensive Care, Maastricht University Medical Center+, Maastricht University, the Netherlands
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Mostafa MMA, Hasanin AM, Alhamade F, Abdelhamid B, Safina AG, Kasem SM, Hosny O, Mahmoud M, Fouad E, Rady A, Amin SM. Accuracy and trending of non-invasive oscillometric blood pressure monitoring at the wrist in obese patients. Anaesth Crit Care Pain Med 2020; 39:221-227. [PMID: 32068134 DOI: 10.1016/j.accpm.2020.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/07/2020] [Accepted: 01/10/2020] [Indexed: 10/25/2022]
Abstract
BACKGROUND In obese patients, non-invasive blood pressure monitoring in the arm is difficult due to the arm size and morphology. We compared the non-invasive oscillometric wrist blood pressure measurement with the arm and forearm in obese patients monitored with invasive radial blood pressure (reference standard). METHODS This prospective observational study included adult obese patients scheduled for bariatric surgery. Non-invasive blood pressure was measured at the arm, upper forearm and wrist of one upper extremity, while invasive blood pressure was simultaneously measured through a radial arterial catheter in the contralateral upper extremity. The accuracy of non-invasive blood pressure reading at each site was evaluated for absolute and trending values using the Bland-Altman analysis and Spearman's correlation coefficient. RESULTS In 40 patients, 262, 259, and 263 pairs of non-invasive blood pressure readings were obtained from the arm, forearm, and wrist sites, respectively. As primary outcome, the correlation coefficient for systolic blood pressure was higher for the wrist (0.92, 95% confidence interval (CI) [0.9-0.94]) than for the arm (0.74, 95% CI [0.68-0.79]) and the forearm (0.71, 95% CI [0.64-0.76]) (P<0.05). The non-invasive systolic wrist blood pressure showed the least mean bias and the narrowest limits of agreement (-0.3±7.6mmHg) when compared with forearm (4.3±16) and arm measurements (14.2±13.6) (P<0.05). For trending values, the correlation coefficient was the highest at the wrist. CONCLUSION In obese patients undergoing bariatric surgery, non-invasive blood pressure measured at the wrist showed the highest accuracy in comparison with the arm and forearm.
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Affiliation(s)
- Maha M A Mostafa
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Ahmed M Hasanin
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Fatema Alhamade
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Bassant Abdelhamid
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Ahmed G Safina
- Department of general surgery, Cairo university, Cairo, Egypt.
| | - Sahar M Kasem
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Osama Hosny
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Mohamed Mahmoud
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Eman Fouad
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Ashraf Rady
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
| | - Sarah M Amin
- Department of anaesthesia and critical care medicine, faculty of medicine, 01 Elsarayah Street, Elmanyal Cairo 11559, Egypt.
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Morelli J, Briganti A, Fuchs B, Huber Ð, Evans AL, Reljić S, Arnemo JM. Comparison of two non-invasive arterial blood pressure monitoring techniques in brown bears ( Ursus arctos). Vet Anim Sci 2020; 9:100094. [PMID: 32734104 PMCID: PMC7386746 DOI: 10.1016/j.vas.2020.100094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 01/11/2020] [Accepted: 01/15/2020] [Indexed: 11/25/2022] Open
Abstract
Monitoring arterial blood pressure (BP), represents a more accurate evaluation of hemodynamics than heart rate alone and is essential for preventing and treating intra- and post-operative complications in wildlife chemical immobilization. The objectives of the study were to test the correlation between standard oscillometry and Korotkoff's technique in anesthetized free-ranging brown bears in Croatia and Scandinavia and to assess the blood pressure in both locations. Five bears were snared and darted with xylazine and ketamine in Croatia, and 20 bears were darted from a helicopter with medetomidine and tiletamine-zolazepam in Scandinavia. Blood pressure was simultaneously measured with both techniques every 5 minutes. Correlation between techniques, trends of BP variation, and the factors of the capture which likely influenced BP were assessed. Successful measurements of BP were achieved in 93% of all attempts with the Korotkoff's technique but in only 29% of all attempts with oscillometry. The latter method mostly provided lower values of BP compared to Korotkoff's technique in yearlings. Most bears showed a decreasing trend in systolic and mean BP over time, consistent between the two techniques. All bears were hypertensive: the auscultatory technique detected moderate to severe systolic hypertension in 25% and 84% of bears in Croatia and in Scandinavia, respectively, with significantly higher BP in subadults and adults compared to yearlings. Only Korotkoff's method resulted in a reliable and effective tool for BP assessment in brown bears. The anesthetic protocols used in the present study in association with the capture methods produced hypertension in all animals.
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Key Words
- BP, blood pressure
- Blood pressure
- Brown bear
- CW/LC, cuff width/limb circumference
- DAP, diastolic arterial blood pressure
- GPS, Global Positioning System
- HR, heart rate
- Hypertension
- IM, intramuscularly
- Korotkoff
- LoA, limit of agreement
- MAP, mean arterial blood pressure
- MZT, medetomidine-zolazepam-tiletamine
- Oscillometry
- SAP, systolic arterial blood pressure
- SD, Standard Deviation
- SpO2, hemoglobin-oxygen saturation
- Sphygmomanometer
- VHF, Very High Frequency
- XK, xylazine-ketamine
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Affiliation(s)
- Jacopo Morelli
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Anne Evenstadvegen 80, 2480 Koppang, Norway
| | - Angela Briganti
- Department of Veterinary Sciences University of Pisa, Via Livornese, 56122 San Piero A Grado, Italy
| | - Boris Fuchs
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Anne Evenstadvegen 80, 2480 Koppang, Norway
| | - Ðuro Huber
- Department of Biology, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova ul. 55, 10000 Zagreb, Croatia
| | - Alina L Evans
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Anne Evenstadvegen 80, 2480 Koppang, Norway
| | - Slaven Reljić
- Department of Biology, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova ul. 55, 10000 Zagreb, Croatia
| | - Jon M Arnemo
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Anne Evenstadvegen 80, 2480 Koppang, Norway.,Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 901 83 Umeå, Sweden
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Um-Bergström P, Hallberg J, Pourbazargan M, Berggren-Broström E, Ferrara G, Eriksson MJ, Nyrén S, Gao J, Lilja G, Lindén A, Wheelock ÅM, Melén E, Sköld CM. Pulmonary outcomes in adults with a history of Bronchopulmonary Dysplasia differ from patients with asthma. Respir Res 2019; 20:102. [PMID: 31126291 PMCID: PMC6534852 DOI: 10.1186/s12931-019-1075-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 05/16/2019] [Indexed: 12/23/2022] Open
Abstract
Background Bronchopulmonary dysplasia (BPD) is a risk factor for respiratory disease in adulthood. Despite the differences in underlying pathology, patients with a history of BPD are often treated as asthmatics. We hypothesized that pulmonary outcomes and health-related quality of life (HRQoL) were different in adults born preterm with and without a history of BPD compared to asthmatics and healthy individuals. Methods We evaluated 96 young adults from the LUNAPRE cohort (clinicaltrials.gov/ct2/show/NCT02923648), including 26 individuals born preterm with a history of BPD (BPD), 23 born preterm without BPD (preterm), 23 asthmatics and 24 healthy controls. Extensive lung function testing and HRQoL were assessed. Results The BPD group had more severe airway obstruction compared to the preterm-, (FEV1− 0.94 vs. 0.28 z-scores; p ≤ 0.001); asthmatic- (0.14 z-scores, p ≤ 0.01) and healthy groups (0.78 z-scores, p ≤ 0.001). Further, they had increased ventilation inhomogeneity compared to the preterm- (LCI 6.97 vs. 6.73, p ≤ 0.05), asthmatic- (6.75, p = 0.05) and healthy groups (6.50 p ≤ 0.001). Both preterm groups had lower DLCO compared to healthy controls (p ≤ 0.001 for both). HRQoL showed less physical but more psychological symptoms in the BPD group compared to asthmatics. Conclusions Lung function impairment and HRQoL in adults with a history of BPD differed from that in asthmatics highlighting the need for objective assessment of lung health. Electronic supplementary material The online version of this article (10.1186/s12931-019-1075-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Petra Um-Bergström
- Sachs' Children and Youth Hospital, Department of Pediatrics, Södersjukhuset, 118 83, Stockholm, Sweden. .,Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden.
| | - Jenny Hallberg
- Sachs' Children and Youth Hospital, Department of Pediatrics, Södersjukhuset, 118 83, Stockholm, Sweden.,Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - Melvin Pourbazargan
- Department of Respiratory Medicine & Allergy, Karolinska University Hospital, Stockholm, Sweden.,Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden
| | - Eva Berggren-Broström
- Sachs' Children and Youth Hospital, Department of Pediatrics, Södersjukhuset, 118 83, Stockholm, Sweden.,Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - Giovanni Ferrara
- Department of Respiratory Medicine & Allergy, Karolinska University Hospital, Stockholm, Sweden.,Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden
| | - Maria J Eriksson
- Department of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Sven Nyrén
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Thoracic Radiology, Karolinska University Hospital, Stockholm, Sweden
| | - Jing Gao
- Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden
| | - Gunnar Lilja
- Sachs' Children and Youth Hospital, Department of Pediatrics, Södersjukhuset, 118 83, Stockholm, Sweden.,Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - Anders Lindén
- Department of Respiratory Medicine & Allergy, Karolinska University Hospital, Stockholm, Sweden.,Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Åsa M Wheelock
- Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden
| | - Erik Melén
- Sachs' Children and Youth Hospital, Department of Pediatrics, Södersjukhuset, 118 83, Stockholm, Sweden.,Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - C Magnus Sköld
- Department of Respiratory Medicine & Allergy, Karolinska University Hospital, Stockholm, Sweden.,Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden
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de Oliveira Jorge P, de Lima J, Chong e Silva D, Medeiros D, Solé D, Wandalsen G. Impulse oscillometry in the assessment of children's lung function. Allergol Immunopathol (Madr) 2019; 47:295-302. [PMID: 29983239 DOI: 10.1016/j.aller.2018.03.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/21/2018] [Accepted: 03/27/2018] [Indexed: 01/28/2023]
Abstract
PURPOSE To review available evidence in the literature on impulse oscillometry in the assessment of lung function in children with respiratory diseases, especially asthma. DATA COLLECTION Research in the Medline, PubMed, and Lilacs databases, with the keywords forced oscillation, impulse oscillometry, asthma and impulse oscillometry. RESULTS The Impulse Oscillometry System (IOS) allows the measurement of resistance and reactance of airways and is used as a diagnostic resource. A significant association between the findings of the IOS and those of spirometry is observed. In asthma, the IOS has already been used to assess the bronchodilator response and the therapeutic response to different drugs and has shown to be a sensitive technique to evaluate disease control. There are limitations to this assessment, such as children with attention deficit and in some cases it is difficult to interpret the results from a clinical point of view. CONCLUSION The IOS is a useful tool for the measurement of the lung function of children. It is an easy test, although its interpretation is not straightforward.
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Nazemiyeh M, Nouri-Vaskeh M, Somi MH, Saeedi E, Sharifi A. Lung function parameters in patients with gastroesophageal reflux without respiratory symptoms: a case-control study. Gastroenterol Hepatol Bed Bench 2019; 12:287-291. [PMID: 31749916 PMCID: PMC6820839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 08/18/2019] [Indexed: 06/10/2023]
Abstract
AIM This research aimed to evaluate the effect of gastroesophageal reflux disease (GERD) on pulmonary volumes, airflows, and airway resistance in the patients without respiratory symptoms and compare them with the healthy subjects. BACKGROUND GERD is the return of gastric content into the esophagus and beyond. GERD may play an essential role in the extraesophageal diseases, including chest pain, asthma, laryngitis, chronic cough, and sinusitis. The relation between GERD and airway involvement in asthma and also bronchoconstrictor effects of GERD are well recognized, but its impact on lung parameters in the patients with GERD without respiratory symptoms is unclear. METHODS In a case-control study, 78 GERD patients without pulmonary symptoms and 93 healthy subjects as control group were enrolled. The impulse oscillometry examined airway resistance. The body plethysmograph measured the pulmonary volumes and airflows. RESULTS The mean age of GERD patients and the healthy subjects were 37.30±9.76 and 34.74±11.10, respectively. A total of 53.8% of patients and 67.7% of healthy subjects were male. The lung volumes measured by the body plethysmography were normal in both patients and healthy subjects. However, there was a significant difference between the groups in forced expiratory volume in 1 second (FEV1)/forced vital capacity (FVC) (P=0.01) and maximal mid expiratory flow (MMEF) (P=0.008). Airway resistance at R5Hz was significantly higher in the case group than the control group (P=0.001). CONCLUSION The results of the current study demonstrated that GERD patients have small airway disease even in the absence of respiratory symptoms.
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Affiliation(s)
- Masoud Nazemiyeh
- Tuberculosis and Lung Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Masoud Nouri-Vaskeh
- Connective Tissue Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,
- Medical Philosophy and History Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Hossein Somi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ehsan Saeedi
- Tuberculosis and Lung Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Akbar Sharifi
- Tuberculosis and Lung Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Assumpção MSD, Ribeiro JD, Wamosy RMG, Figueiredo FCXSD, Parazzi PLF, Schivinski CIS. Impulse oscillometry and obesity in children. J Pediatr (Rio J) 2018; 94:419-424. [PMID: 28843062 DOI: 10.1016/j.jped.2017.06.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 05/11/2017] [Accepted: 05/24/2017] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE To compare impulse oscillometry system parameters of normal-weight children with overweight and obese children. METHOD All participants were submitted to the evaluation of lung function (spirometry and impulse oscillometry) following the American Thoracic Society standards. The evaluation of respiratory mechanics was performed using the Jaeger™ MasterScreen™ Impulse Oscillometry System (Erich Jaeger, Germany), three tests were recorded, with acquisition for at least 20seconds. RESULTS The study included 81 children (30 in the control group, 21 in the overweight group, and 30 the in obesity group), matched for age and sex. Regarding spirometry data, obesity group showed higher numerical values in relation to the control group; however, there were no significant differences among the three groups. For impulse oscillometry parameters, there was a difference between control group and obesity group for respiratory impedance (p=0.036), resistance at 5hertz (p=0.026), resonant frequency (p=0.029), and reactance area (p=0.014). For the parameters expressed in percentage of predicted, there were differences in resistance at 5 hertz, resonant frequency, and reactance area between control group and obesity group. CONCLUSIONS Obese children showed increased oscillometry parameters values representative of airway obstruction, compared to normal-weight children. Changes in some oscillometry parameters can already be observed in overweight school-aged children.
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Affiliation(s)
- Maíra S de Assumpção
- Universidade Estadual de Campinas (Unicamp), Departamento de Pediatria, Campinas, SP, Brazil
| | - José D Ribeiro
- Universidade Estadual de Campinas (Unicamp), Departamento de Pediatria, Campinas, SP, Brazil
| | - Renata M G Wamosy
- Universidade do Estado de Santa Catarina (UDESC), Departamento de Fisioterapia, Florianópolis, SC, Brazil
| | | | - Paloma L F Parazzi
- Universidade Estadual de Campinas (Unicamp), Departamento de Pediatria, Campinas, SP, Brazil
| | - Camila I S Schivinski
- Universidade Estadual de Campinas (Unicamp), Departamento de Pediatria, Campinas, SP, Brazil; Universidade do Estado de Santa Catarina (UDESC), Departamento de Fisioterapia, Florianópolis, SC, Brazil.
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Lipworth BJ, Jabbal S. What can we learn about COPD from impulse oscillometry? Respir Med 2018; 139:106-9. [PMID: 29857993 DOI: 10.1016/j.rmed.2018.05.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/14/2018] [Accepted: 05/06/2018] [Indexed: 11/24/2022]
Abstract
Impulse oscillometry (IOS) is the most commonly used type of forced oscillation technique in clinical practice, although relatively little is known about its application in COPD. Resistance at 20 Hz (R20) is unrelated to COPD severity and does not improve with bronchodilatation or bronchoconstriction, inferring a lack of large airway involvement in COPD. Peripheral airway resistance expressed as frequency dependent heterogeneity between 5 Hz and 20 Hz (R5-R20), and peripheral airway compliance as area under the reactance curve (AX), are both closely related to COPD severity and exacerbations. Both R5-R20 and AX markedly improve in response to long acting bronchodilators, while AX appears to be more sensitive than R5-R20 in response to bronchoconstriction. Future studies may be directed to assess if IOS in combination with spirometry is more sensitive at predicting future exacerbations. Perhaps AX might also be useful as a screening tool in early stage disease or to monitor long term decline in COPD.
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Nicklas JY, Beckmann D, Killat J, Petzoldt M, Reuter DA, Rösch T, Saugel B. Continuous noninvasive arterial blood pressure monitoring using the vascular unloading technology during complex gastrointestinal endoscopy: a prospective observational study. J Clin Monit Comput 2019; 33:25-30. [PMID: 29556885 DOI: 10.1007/s10877-018-0131-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 03/14/2018] [Indexed: 10/17/2022]
Abstract
The innovative vascular unloading technology (VUT) allows continuous noninvasive arterial blood pressure (AP) monitoring. We aimed to investigate whether the VUT enables AP changes to be detected earlier compared with intermittent AP monitoring in patients undergoing gastrointestinal endoscopy. In this prospective observational study, we recorded continuous AP measurements with the VUT (CNAP system; CNSystems Medizintechnik AG, Graz, Austria) and intermittent AP measurements with upper arm cuff oscillometry in 90 patients undergoing complex gastrointestinal endoscopy (Department of Interventional Endoscopy at the University Medical Center Hamburg-Eppendorf, Hamburg, Germany). A "hypotensive phase" was defined as a time period of at least 30 s during which ≥ 50% of the VUT-AP values were in a predefined range of hypotension, i.e., AP value a) ≥ 10% below the last oscillometric value and b) ≤ 65 mmHg for mean AP or ≤ 90 mmHg for systolic AP. In the 5-min-interval between two oscillometric measurements, one or more hypotensive phases were detected in 26 patients (29%) for mean AP and in 27 patients (30%) for systolic AP. Hypotensive phases had a mean duration of 195 ± 99 s for mean AP and 197 ± 97 s for systolic AP with a mean procedure duration of 36 (± 21) min. Continuous noninvasive AP monitoring using the VUT enables hypotensive phases to be detected earlier compared with intermittent AP monitoring during complex gastrointestinal endoscopy. These hypotensive phases may be missed or only belatedly recognized with intermittent AP monitoring. Continuous noninvasive AP measurement facilitates detecting hemodynamic instability more rapidly and therefore may improve patient safety.
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Herráiz-Adillo Á, Cavero-Redondo I, Álvarez-Bueno C, Bidner J, Martínez-Vizcaíno V, Notario-Pacheco B. Spectrum effect and spectrum bias in the oscillometric ankle brachial index to diagnose peripheral arterial disease: Clinical implications. Atherosclerosis 2018. [PMID: 29529395 DOI: 10.1016/j.atherosclerosis.2018.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
BACKGROUND AND AIMS The diagnostic performance of the oscillometric ankle brachial index (ABI) to detect peripheral arterial disease (PAD) varies among populations, suggesting a spectrum effect. When this heterogeneity modifies post-test probabilities, a spectrum bias arises. This study evaluates the presence and influence of spectrum effect and spectrum bias on test performance and clinical decisions. METHODS Oscillometric and Doppler ABI were compared in two settings: Primary-Care (333 legs) and Vascular-Service (41 legs). Spectrum effect was assessed using stratification and logistic regression, while spectrum bias was assessed through graphical and statistical tests based on predictive values and likelihood ratios, respectively. RESULTS Across subgroups, sensitivity ranged from 61.5% to 90.9%, and specificity from 81.8% to 99.1%. Logistic regression confirmed a spectrum effect in setting, diabetes, smoking status and age (univariate), and setting and diabetes (multivariate model). The positive likelihood ratio ranged from 5.0 to 89.1 in subgroups, leading to a spectrum bias in diabetic, smoking (both subgroups) and age (both subgroups). Therefore, a positive test ruled in differently the disease across subgroups, with a high rate of false positives in diabetic, smoking and >75-year-old patients. The negative likelihood ratio ranged from 0.09 to 0.39 in subgroups, with significant spectrum bias in Primary-Care patients, non-diabetics and smokers. Thus, in these subgroups, a negative test ruled out the disease with less certainty. CONCLUSIONS Spectrum effect and spectrum bias were found in oscillometric ABI to detect PAD, potentially affecting clinical decisions, especially for positive tests. Information about spectrum variables and the application of specific subgroups indicators are necessary.
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Affiliation(s)
- Ángel Herráiz-Adillo
- Universidad de Castilla-La Mancha, Social and Health Care Research Center, Cuenca, Spain; Health Service of Castilla-La Mancha (SESCAM), Department of Primary Care, Tragacete, Cuenca, Spain
| | - Iván Cavero-Redondo
- Universidad de Castilla-La Mancha, Social and Health Care Research Center, Cuenca, Spain
| | - Celia Álvarez-Bueno
- Universidad de Castilla-La Mancha, Social and Health Care Research Center, Cuenca, Spain
| | - Johana Bidner
- Universidad de Castilla-La Mancha, Social and Health Care Research Center, Cuenca, Spain
| | - Vicente Martínez-Vizcaíno
- Universidad de Castilla-La Mancha, Social and Health Care Research Center, Cuenca, Spain; Universidad Autónoma de Chile, Facultad de Ciencias de la Salud, Talca, Chile.
| | - Blanca Notario-Pacheco
- Universidad de Castilla-La Mancha, Social and Health Care Research Center, Cuenca, Spain
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Jabbal S, Lipworth BJ. Sensitivity of Lung Resistance and Compliance to Beta-Blocker Induced Bronchoconstriction and Long Acting Beta-Agonist Withdrawal in COPD. Lung 2018; 196:15-8. [PMID: 29264651 DOI: 10.1007/s00408-017-0079-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 12/04/2017] [Indexed: 11/23/2022]
Abstract
Little is known about impulse oscillometry (IOS) in COPD. IOS is an effort independent measure of lung resistance and reactance (compliance). We assessed how frequency dependence of resistance (R) and reactance (X) changed in response to bronchoconstriction with carvedilol followed by long acting beta-agonist (LABA) withdrawal. N = 12 patients with moderate to severe COPD were analysed, who had ≥ 100 ml fall in FEV1 with carvedilol. Compared to baseline taking ICS/LABA there were 21, 59, and 135% significant changes in resistance at 5 Hz (R5), reactance at 5 Hz (X5), and reactance area (AX), respectively, with carvedilol, while after LABA withdrawal only AX showed a further significant increase to 210% (i.e. reduced compliance). Hence changes in lung compliance rather than resistance play a more important role in the beta-2 receptor-mediated responses in COPD.
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Schivinski CIS, de Assumpção MS, de Figueiredo FCXS, Wamosy RMG, Ferreira LG, Ribeiro JD. Impulse oscillometry, spirometry, and passive smoking in healthy children and adolescents. Rev Port Pneumol (2006) 2017; 23:311-316. [PMID: 28760702 DOI: 10.1016/j.rppnen.2017.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 05/17/2017] [Accepted: 06/25/2017] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE To identify changes in the forced and quiet breathing parameters of lung function in healthy children and adolescents exposed to passive smoking (PS). METHOD Comparative cross-sectional study. Healthy schoolchildren aged 6 to 14 years. We collected anthropometric data, lung function parameters using spirometry (forced breathing), and quiet breathing parameters using impulse oscillometry. The sample was divided into two groups according to exposure to PS: passive smoking group (PSG) and non-passive smoking group (NPSG). For the statistical analysis, the Shapiro-Wilk test was used to verify data normality and the T-test or Mann-Whitney test to compare spirometric and oscillometric parameters between groups (p≤0.05). MAIN FINDINGS The study included 78 children and adolescents, with 14 boys and 25 girls in each group. There were differences in the mean values for peak expiratory flow (p=0.01). There were no significant differences between the groups in values for z-score and lower limit of normal. The PSG had higher mean absolute values for reactance area (X5=0.05) and significant percentage of predicted values for the following impulse oscillometry parameters: central airway resistance (R20%, p=0.03) and for the indicators of presence of airway obstruction (Fres%, p=0.01; X5%=0.01% and AX%, p=0.01). CONCLUSION Children and adolescents exposed to PS had lower values for the spirometric variables and higher values for the oscillometric variables, indicating changes in forced and quiet parameters of lung function compared to the NPSG.
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Affiliation(s)
- C I S Schivinski
- Health and Sports Science Center (CEFID), Physiotherapy Department, Santa Catarina State University (UDESC), Florianópolis, SC, Brazil.
| | - M S de Assumpção
- Health and Sports Science Center (CEFID), Physiotherapy Department, Santa Catarina State University (UDESC), Florianópolis, SC, Brazil; Department of Pediatrics, Faculty of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - F C X S de Figueiredo
- Health and Sports Science Center (CEFID), Physiotherapy Department, Santa Catarina State University (UDESC), Florianópolis, SC, Brazil
| | - R M G Wamosy
- Health and Sports Science Center (CEFID), Physiotherapy Department, Santa Catarina State University (UDESC), Florianópolis, SC, Brazil
| | - L G Ferreira
- Health and Sports Science Center (CEFID), Physiotherapy Department, Santa Catarina State University (UDESC), Florianópolis, SC, Brazil
| | - J D Ribeiro
- Department of Pediatrics, Faculty of Medical Sciences, University of Campinas (UNICAMP), Campinas, SP, Brazil
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Um-Bergström P, Hallberg J, Thunqvist P, Berggren-Broström E, Anderson M, Adenfelt G, Lilja G, Ferrara G, Sköld CM, Melén E. Lung function development after preterm birth in relation to severity of Bronchopulmonary dysplasia. BMC Pulm Med 2017; 17:97. [PMID: 28666441 DOI: 10.1186/s12890-017-0441-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 06/23/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bronchopulmonary dysplasia (BPD) is a strong risk factor for respiratory morbidity in children born preterm. Our aims were to evaluate lung function in adolescents born preterm with and without a history of BPD, and to assess lung function change over time from school age. METHODS Fifty-one individuals born in Stockholm, Sweden between gestational ages 24 to 31 weeks (23 neonatally diagnosed with respiratory distress syndrome (RDS) but not BPD, and 28 graded as mild (n = 17), moderate (n = 7) or severe (n = 4) BPD) were examined in adolescence (13-17 years of age) using spirometry, impulse oscillometry (IOS), plethysmography, and ergospirometry. Comparison with lung function data from school age (6-8 years of age) was also performed. RESULTS Adolescents with a history of BPD had lower forced expiratory volume in 1 s (FEV1) compared to those without BPD (-0.61 vs.-0.02 z-scores, P < 0.05), with lower FEV1 values significantly associated with BPD severity (P for trend 0.002). Subjects with severe BPD had higher frequency dependence of resistance, R5-20, (P < 0.001 vs. non-BPD subjects) which is an IOS indicator of peripheral airway involvement. Between school age and adolescence, FEV1/FVC z-scores decreased in all groups and particularly in the severe BPD group (from -1.68 z-scores at 6-8 years to -2.74 z-scores at 13-17 years, p < 0.05 compared to the non-BPD group). CONCLUSIONS Our results of spirometry and IOS measures in the BPD groups compared to the non-BPD group suggest airway obstruction including involvement of peripheral airways. The longitudinal result of a decrease in FEV1/FVC in the group with severe BPD might implicate a route towards chronic airway obstruction in adulthood.
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Šelmytė–Besusparė A, Barysienė J, Petrikonytė D, Aidietis A, Marinskis G, Laucevičius A. Auscultatory versus oscillometric blood pressure measurement in patients with atrial fibrillation and arterial hypertension. BMC Cardiovasc Disord 2017; 17:87. [PMID: 28335730 PMCID: PMC5364730 DOI: 10.1186/s12872-017-0521-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 03/11/2017] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The aim of our study was to investigate the reliability of automated oscillometric blood pressure (BP) monitoring in the presence and absence of atrial fibrillation (AF) in hypertensive patients. METHODS BP was measured and compared in 71 randomly selected patients with AF and arterial hypertension diagnosis, 4 times each by auscultatory and oscillometric (Microlife BP A6 PC with AF detection system) methods. RESULTS Study included 71 patients: 36 males (mean age 67.4 years) and 35 females (70.2 years). At the time of BP measuring procedure, 36 patients were in sinus rhythm (SR) and 35 in AF. In SR patients mean systolic blood pressure (SBP) was 132 ± 17.9 mmHg with auscultatory method (AM), 137.4 ± 19.4 mmHg with oscillometric method (OM); mean diastolic BP was 77.1 ± 10.9 mmHg (AM), 78.5 ± 12.2 mmHg (OM), in AF patients mean SBP was 127.5 ± 15.1 mmHg (AM), 133.6 ± 17.4 mmHg (OM); mean diastolic BP was 81.4 ± 9.9 mmHg (AM), 83.5 ± 11.8 mmHg (OM), p = 0.037. The averages of differences for SBP and DBP in sinus rhythm group were (-5.3 mmHg (95% limits of agreement -27.2 - 16.6)) and (-1.4 mmHg (95% limits of agreement -12.8 - 10.0)), respectively. In patients with AF the averages of differences for SBP and DBP were (-6.1 mmHg (95% limits of agreement -23.9 - 11.7)) and (-2.1 mmHg (95% limits of agreement -12.9 - 8.7)), respectively. CONCLUSIONS The oscillometric device validated for patients with AF on average gives 5.3 mmHg higher systolic BP values for patients with SR and 6.3 mmHg higher BP values for patients with AF. However, the limits of agreement between two methods reveal wide range of random error rates which is a questionable topic in clinical practice, as it could possibly affect the treatment of arterial hypertension in patients with AF.
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Affiliation(s)
- Aistėja Šelmytė–Besusparė
- Centre of Cardiology and Angiology, Vilnius University Hospital Santariskiu Clinics, 2 Santariškių St., LT-08661 Vilnius, Lithuania
- Clinic of Cardiovascular Diseases, Faculty of Medicine, Vilnius University, 21 M. K. Čiurlionio St., LT-03101 Vilnius, Lithuania
| | - Jūratė Barysienė
- Centre of Cardiology and Angiology, Vilnius University Hospital Santariskiu Clinics, 2 Santariškių St., LT-08661 Vilnius, Lithuania
- Clinic of Cardiovascular Diseases, Faculty of Medicine, Vilnius University, 21 M. K. Čiurlionio St., LT-03101 Vilnius, Lithuania
| | - Dovilė Petrikonytė
- Centre of Cardiology and Angiology, Vilnius University Hospital Santariskiu Clinics, 2 Santariškių St., LT-08661 Vilnius, Lithuania
- Clinic of Cardiovascular Diseases, Faculty of Medicine, Vilnius University, 21 M. K. Čiurlionio St., LT-03101 Vilnius, Lithuania
| | - Audrius Aidietis
- Centre of Cardiology and Angiology, Vilnius University Hospital Santariskiu Clinics, 2 Santariškių St., LT-08661 Vilnius, Lithuania
- Clinic of Cardiovascular Diseases, Faculty of Medicine, Vilnius University, 21 M. K. Čiurlionio St., LT-03101 Vilnius, Lithuania
| | - Germanas Marinskis
- Centre of Cardiology and Angiology, Vilnius University Hospital Santariskiu Clinics, 2 Santariškių St., LT-08661 Vilnius, Lithuania
- Clinic of Cardiovascular Diseases, Faculty of Medicine, Vilnius University, 21 M. K. Čiurlionio St., LT-03101 Vilnius, Lithuania
| | - Aleksandras Laucevičius
- Centre of Cardiology and Angiology, Vilnius University Hospital Santariskiu Clinics, 2 Santariškių St., LT-08661 Vilnius, Lithuania
- Clinic of Cardiovascular Diseases, Faculty of Medicine, Vilnius University, 21 M. K. Čiurlionio St., LT-03101 Vilnius, Lithuania
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Forouzanfar M, Dajani HR, Groza VZ, Bolic M, Rajan S, Batkin I. Bayesian fusion algorithm for improved oscillometric blood pressure estimation. Med Eng Phys 2016; 38:1300-1304. [PMID: 27543419 DOI: 10.1016/j.medengphy.2016.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 06/20/2016] [Accepted: 08/07/2016] [Indexed: 11/16/2022]
Abstract
A variety of oscillometric algorithms have been recently proposed in the literature for estimation of blood pressure (BP). However, these algorithms possess specific strengths and weaknesses that should be taken into account before selecting the most appropriate one. In this paper, we propose a fusion method to exploit the advantages of the oscillometric algorithms and circumvent their limitations. The proposed fusion method is based on the computation of the weighted arithmetic mean of the oscillometric algorithms estimates, and the weights are obtained using a Bayesian approach by minimizing the mean square error. The proposed approach is used to fuse four different oscillometric blood pressure estimation algorithms. The performance of the proposed method is evaluated on a pilot dataset of 150 oscillometric recordings from 10 subjects. It is found that the mean error and standard deviation of error are reduced relative to the individual estimation algorithms by up to 7 mmHg and 3 mmHg in estimation of systolic pressure, respectively, and by up to 2 mmHg and 3 mmHg in estimation of diastolic pressure, respectively.
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Affiliation(s)
- Mohamad Forouzanfar
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Avenue, Ottawa, ON K1N 6N5, Canada; Department of Electrical Engineering, Stanford University, 350 Serra Mall, Stanford, CA 94305, USA.
| | - Hilmi R Dajani
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Avenue, Ottawa, ON K1N 6N5, Canada
| | - Voicu Z Groza
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Avenue, Ottawa, ON K1N 6N5, Canada
| | - Miodrag Bolic
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Avenue, Ottawa, ON K1N 6N5, Canada
| | - Sreeraman Rajan
- Department of Systems and Computer Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada
| | - Izmail Batkin
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Avenue, Ottawa, ON K1N 6N5, Canada
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50
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Hay A, Ayis S, Nzelu D, James L, Kametas NA. Validation of the Withings BP-800 in pregnancy and impact of maternal characteristics on the accuracy of blood pressure measurement. Pregnancy Hypertens 2016; 6:406-412. [PMID: 27939491 DOI: 10.1016/j.preghy.2016.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 09/20/2016] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Firstly, to validate the Withings BP-800 automated device for use in pregnancy and, secondly, to assess the impact of maternal somatometric and demographic variables on the accuracy of the device. DESIGN Prospective observational study. SETTING Kings College Hospital, London, UK. POPULATION Forty-seven women of any gestation. METHODS Validation: The British Hypertension Society (BHS) Protocol (1993) was used for the validation of the Withings BP-800. Two trained observers took nine sequential same arm measurements alternating between the Withings BP-800 and the mercury sphygmomanometer. Assessment of factors affecting the disagreement between the two devices: The associations between discrepancies in the measured systolic and diastolic blood pressure by the two devices and potential predictors of discrepancy and/or possible confounders of associations including age, gestational age, ethnicity, body mass index and arm circumference were investigated using two-level mixed effects models to take into account the repeated measurements. MAIN OUTCOME MEASURES Accuracy of the Withings BP-800 based on the grading criteria of the BHS Protocol (1993). RESULTS The Withings BP-800 failed to meet the validation criteria of the BHS protocol for pregnancy and preeclampsia. Inter-device discrepancy was significantly associated with larger arm circumferences and was more pronounced with diastolic blood pressure. This relationship was independent of other maternal characteristics. CONCLUSIONS The Withings BP-800 cannot be recommended for the measurement of blood pressure in pregnancy or preeclampsia. The inaccuracy of the Withings BP-800 increases when used in patients with larger arm circumferences with a propensity to over-read.
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Affiliation(s)
- Anna Hay
- Antenatal Hypertension Clinic, Division of Women's Health, Kings College Hospital NHS Foundation Trust, Denmark Hill, London SE5 9RS, UK
| | - Salma Ayis
- Senior Lecturer in Medical Statistics, Division of Health and Social Care Research, Kings College London, Addison House, Guy's Campus, London SE1 1UL, UK
| | - Diane Nzelu
- Antenatal Hypertension Clinic, Division of Women's Health, Kings College Hospital NHS Foundation Trust, Denmark Hill, London SE5 9RS, UK
| | - Lauren James
- Antenatal Hypertension Clinic, Division of Women's Health, Kings College Hospital NHS Foundation Trust, Denmark Hill, London SE5 9RS, UK
| | - Nikos A Kametas
- Antenatal Hypertension Clinic, Division of Women's Health, Kings College Hospital NHS Foundation Trust, Denmark Hill, London SE5 9RS, UK; Harris Birthright Research Centre for Fetal Medicine, Division of Women's Health, Kings College Hospital, Denmark Hill, London SE5 9RS, UK.
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