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de Souza HCM, Pessoa MF, Clemente RDS, da Silva AV, Cardoso PRG, Fernandes J, Dornelas de Andrade A. Effects of 12 weeks of inspiratory muscle training and whole body vibration on the inflammatory profile, BDNF and muscular system in pre-frail elderly women: A randomized controlled trial. Arch Gerontol Geriatr 2024; 123:105421. [PMID: 38593699 DOI: 10.1016/j.archger.2024.105421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 02/12/2024] [Accepted: 03/20/2024] [Indexed: 04/11/2024]
Abstract
AIM to investigate the effects of the whole body vibration (WBV) and inspiratory muscle training (IMT) on the inflammatory profile and in muscle mass and strength in pre-frail older women. METHODS this study was a randomized double-blind trial. Forty two older women aged 60-80 years were randomly allocated to IMT + WBV (G1), IMTsham + WBV (G2) or Sham groups (G3). During 12 weeks G1 received both trainings, whereas G2 received WBV alone and G3 received IMT with a low fixed load and were positioned at the vibratory platform without therapeutic effect. Participants were evaluated before and after the intervention for the following outcomes: Brain-derived neurotrophic factor (BDNF) and inflammatory biomarkers (IB), respiratory (RT) and quadriceps thickness (QT) and diaphragmatic mobility (DM) using muscle ultrasound, body composition (BC) using a bioelectrical impedance scale and inspiratory muscle strength (IMS). RESULTS after the training, G1 (114.93 ± 21.29) improved IMS (p<0.005) compared with G2 (91.29 ± 23.10) and G3 (85.21 ± 27.02). There was also a significant improve on time of the DM (p<0.001) and RT (p=0.006) for G1 (8.59 ± 3.55 and 11.11 ± 12.66) compared with G2 (1.05 ± 3.09 and 1.10 ± 10.60) and G3 (0.40 ± 2.29 and -1.85 ± 7.45). BDNF, IB, QT and BC were similar between groups. CONCLUSIONS IMT associated with WBV is effective to improve in increasing IMS, RT and DM in pre-frail older women. However, these interventions do not modify BDNF, IB, QT or BC in this population.
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Affiliation(s)
- Helga Cecília Muniz de Souza
- Postgraduate Program of Biology Applied to Health, Federal University of Pernambuco, Recife, Pernambuco, Brazil; Hospital das Clínicas de Pernambuco - Empresa Brasileira de Serviços Hospitalares (HCPE-EBSERH), Federal University of Pernambuco, Recife, Brazil; Laboratory of Cardiopulmonary Physiotherapy, Department of Physiotherapy, Federal University of Pernambuco, Recife, Brazil.
| | - Maíra Florentino Pessoa
- Postgraduate Program of Biology Applied to Health, Federal University of Pernambuco, Recife, Pernambuco, Brazil; Laboratory of Cardiopulmonary Physiotherapy, Department of Physiotherapy, Federal University of Pernambuco, Recife, Brazil
| | - Rafaela Dos Santos Clemente
- Laboratory of Cardiopulmonary Physiotherapy, Department of Physiotherapy, Federal University of Pernambuco, Recife, Brazil
| | - Alanna Vasconcelos da Silva
- Laboratory of Cardiopulmonary Physiotherapy, Department of Physiotherapy, Federal University of Pernambuco, Recife, Brazil
| | | | - Juliana Fernandes
- Laboratory of Physiotherapy and Collective Health, Department of Physiotherapy, Federal University of Pernambuco, Recife, Brazil
| | - Arméle Dornelas de Andrade
- Postgraduate Program of Biology Applied to Health, Federal University of Pernambuco, Recife, Pernambuco, Brazil; Laboratory of Cardiopulmonary Physiotherapy, Department of Physiotherapy, Federal University of Pernambuco, Recife, Brazil.
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Fouzas S, Vervenioti A, Tsintoni A, Dassios T, Karatza AA, Dimitriou G. Diaphragmatic muscle function in term and preterm infants. Eur J Pediatr 2023; 182:5693-5699. [PMID: 37831303 PMCID: PMC10746574 DOI: 10.1007/s00431-023-05247-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/14/2023]
Abstract
We aimed to assess the determinants of diaphragmatic function in term and preterm infants. 149 infants (56 term; 93 preterm, of whom 14 were diagnosed with bronchopulmonary dysplasia-BPD) were studied before discharge. Diaphragmatic function was assessed by measurement of the maximum transdiaphragmatic pressure (Pdimax)-a measure of diaphragmatic strength, and the pressure-time index of the diaphragm (PTIdi)-a measure of the load-to-capacity ratio of the diaphragm. The Pdimax was higher in term than preterm infants without BPD (90.1 ± 16.3 vs 81.1 ± 11.8 cmH2O; P = 0.001). Term-born infants also had lower PTIdi compared to preterms without BPD (0.052 ± 0.014 vs 0.060 ± 0.017; P = 0.006). In term and preterm infants without BPD, GA was the most significant predictor of Pdimax and PTIdi, independently of the duration of mechanical ventilation and oxygen support. In infants with GA < 32 weeks (n = 30), the Pdimax was higher in infants without BPD compared to those with BPD (76.1 ± 11.1 vs 65.2 ± 11.9 cmH2O; P = 0.015). Preterms without BPD also had lower PTIdi compared to those with BPD (0.069 ± 0.016 vs 0.109 ± 0.017; P < 0.001). In this subgroup, GA was the only significant independent determinant of Pdimax, while BPD and the GA were significant determinants of the PTIdi. Conclusions: Preterm infants present lower diaphragmatic strength and impaired ability to sustain the generated force over time, which renders them prone to diaphragmatic fatigue. In very preterm infants, BPD may further aggravate diaphragmatic function. What is Known: • The diaphragm of preterm infants has limited capacity to undertake the work of breathing effectively. • The maximum transdiaphragmatic pressure (a measure of diaphragmatic strength) and the pressure-time index of the diaphragm (a measure of the load-to-capacity ratio of the muscle) have not been extensively assessed in small infants. What is New: • Preterm infants have lower diaphragmatic strength and impaired ability to sustain the generated force over time, which renders them prone to diaphragmatic fatigue. • In very preterm infants, bronchopulmonary dysplasia may further impair diaphragmatic function.
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Affiliation(s)
- Sotirios Fouzas
- Neonatal Intensive Care Unit, Department of Paediatrics, University of Patras School of Medicine, Rio, Patras, 26500, Greece
| | - Aggeliki Vervenioti
- Neonatal Intensive Care Unit, Department of Paediatrics, University of Patras School of Medicine, Rio, Patras, 26500, Greece
| | - Asimina Tsintoni
- Neonatal Intensive Care Unit, Department of Paediatrics, University of Patras School of Medicine, Rio, Patras, 26500, Greece
| | - Theodore Dassios
- Neonatal Intensive Care Unit, Department of Paediatrics, University of Patras School of Medicine, Rio, Patras, 26500, Greece.
| | - Ageliki A Karatza
- Neonatal Intensive Care Unit, Department of Paediatrics, University of Patras School of Medicine, Rio, Patras, 26500, Greece
| | - Gabriel Dimitriou
- Neonatal Intensive Care Unit, Department of Paediatrics, University of Patras School of Medicine, Rio, Patras, 26500, Greece
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Fu M, Hu Z, Yu G, Luo Y, Xiong X, Yang Q, Song W, Yu Y, Yang T. Predictors of extubation failure in newborns: a systematic review and meta-analysis. Ital J Pediatr 2023; 49:133. [PMID: 37784184 PMCID: PMC10546653 DOI: 10.1186/s13052-023-01538-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 09/21/2023] [Indexed: 10/04/2023] Open
Abstract
Extubation failure (EF) is a significant concern in mechanically ventilated newborns, and predicting its occurrence is an ongoing area of research. To investigate the predictors of EF in newborns undergoing planned extubation, we conducted a systematic review and meta-analysis. A systematic literature search was conducted in PubMed, Web of Science, Embase, and Cochrane Library for studies published in English from the inception of each database to March 2023. The PRISMA guidelines were followed in all phases of this systematic review. The Risk of Bias Assessment for Nonrandomized Studies tool was used to assess methodological quality. Thirty-four studies were included, 10 of which were overall low risk of bias, 15 of moderate risk of bias, and 9 of high risk of bias. The studies reported 43 possible predictors in six broad categories (intrinsic factors; maternal factors; diseases and adverse conditions of the newborn; treatment of the newborn; characteristics before and after extubation; and clinical scores and composite indicators). Through a qualitative synthesis of 43 predictors and a quantitative meta-analysis of 19 factors, we identified five definite factors, eight possible factors, and 22 unclear factors related to EF. Definite factors included gestational age, sepsis, pre-extubation pH, pre-extubation FiO2, and respiratory severity score. Possible factors included age at extubation, anemia, inotropic use, mean airway pressure, pre-extubation PCO2, mechanical ventilation duration, Apgar score, and spontaneous breathing trial. With only a few high-quality studies currently available, well-designed and more extensive prospective studies investigating the predictors affecting EF are still needed. In the future, it will be important to explore the possibility of combining multiple predictors or assessment tools to enhance the accuracy of predicting extubation outcomes in clinical practice.
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Affiliation(s)
- Maoling Fu
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
- School of Nursing, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zhenjing Hu
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
- School of Nursing, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Genzhen Yu
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China.
| | - Ying Luo
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
| | - Xiaoju Xiong
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
| | - Qiaoyue Yang
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
- School of Nursing, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Wenshuai Song
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
- School of Nursing, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yaqi Yu
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
- School of Nursing, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ting Yang
- Department of Nursing, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Qiaokou District, 1095 Jiefang Road, Wuhan, Hubei Province, China
- School of Nursing, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Respiratory Management of the Preterm Infant: Supporting Evidence-Based Practice at the Bedside. CHILDREN 2023; 10:children10030535. [PMID: 36980093 PMCID: PMC10047523 DOI: 10.3390/children10030535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/10/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023]
Abstract
Extremely preterm infants frequently require some form of respiratory assistance to facilitate the cardiopulmonary transition that occurs in the first hours of life. Current resuscitation guidelines identify as a primary determinant of overall newborn survival the establishment, immediately after birth, of adequate lung inflation and ventilation to ensure an adequate functional residual capacity. Any respiratory support provided, however, is an important contributing factor to the development of bronchopulmonary dysplasia. The risks correlated to invasive ventilatory techniques increase inversely with gestational age. Preterm infants are born at an early stage of lung development and are more susceptible to lung injury deriving from mechanical ventilation. Any approach aiming to reduce the global burden of preterm lung disease must implement lung-protective ventilation strategies that begin from the newborn’s first breaths in the delivery room. Neonatologists today must be able to manage both invasive and noninvasive forms of respiratory assistance to treat a spectrum of lung diseases ranging from acute to chronic conditions. We searched PubMed for articles on preterm infant respiratory assistance. Our narrative review provides an evidence-based overview on the respiratory management of preterm infants, especially in the acute phase of neonatal respiratory distress syndrome, starting from the delivery room and continuing in the neonatal intensive care unit, including a section regarding exogenous surfactant therapy.
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Sangsari R, Saeedi M, Maddah M, Mirnia K, Goldsmith JP. Weaning and extubation from neonatal mechanical ventilation: an evidenced-based review. BMC Pulm Med 2022; 22:421. [DOI: 10.1186/s12890-022-02223-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 11/03/2022] [Indexed: 11/17/2022] Open
Abstract
AbstractMechanical ventilation is a lifesaving treatment used to treat critical neonatal patients. It facilitates gas exchange, oxygenation, and CO2 removal. Despite advances in non-invasive ventilatory support methods in neonates, invasive ventilation (i.e., ventilation via an endotracheal tube) is still a standard treatment in NICUs. This ventilation approach may cause injury despite its advantages, especially in preterm neonates. Therefore, it is recommended that neonatologists consider weaning neonates from invasive mechanical ventilation as soon as possible. This review examines the steps required for the neonate's appropriate weaning and safe extubation from mechanical ventilation.
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Dassios T, Vervenioti A, Dimitriou G. Respiratory muscle function in the newborn: a narrative review. Pediatr Res 2022; 91:795-803. [PMID: 33875805 PMCID: PMC8053897 DOI: 10.1038/s41390-021-01529-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 02/02/2023]
Abstract
Our aim was to summarise the current evidence and methods used to assess respiratory muscle function in the newborn, focusing on current and future potential clinical applications. The respiratory muscles undertake the work of breathing and consist mainly of the diaphragm, which in the newborn is prone to dysfunction due to lower muscle mass, flattened shape and decreased content of fatigue-resistant muscle fibres. Premature infants are prone to diaphragmatic dysfunction due to limited reserves and limited capacity to generate force and avoid fatigue. Methods to assess the respiratory muscles in the newborn include electromyography, maximal respiratory pressures, assessment for thoraco-abdominal asynchrony and composite indices, such as the pressure-time product and the tension time index. Recently, there has been significant interest and a growing body of research in assessing respiratory muscle function using bedside ultrasonography. Neurally adjusted ventilator assist is a novel ventilation mode, where the level of the respiratory support is determined by the diaphragmatic electrical activity. Prolonged mechanical ventilation, hypercapnia and hypoxia, congenital anomalies and systemic or respiratory infection can negatively impact respiratory muscle function in the newborn, while caffeine and synchronised or volume-targeted ventilation have a positive effect on respiratory muscle function compared to conventional, non-triggered or pressure-limited ventilation, respectively. IMPACT: Respiratory muscle function is impaired in prematurely born neonates and infants with congenital anomalies, such as congenital diaphragmatic hernia. Respiratory muscle function is negatively affected by prolonged ventilation and infection and positively affected by caffeine and synchronised compared to non-synchronised ventilation modes. Point-of-care diaphragmatic ultrasound and neurally adjusted ventilator assist are recent diagnostic and therapeutic technological developments with significant clinical applicability.
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Affiliation(s)
- Theodore Dassios
- Department of Women and Children's Health, King's College London, London, UK. .,Department of Paediatrics, University of Patras, Patras, Greece.
| | - Aggeliki Vervenioti
- grid.11047.330000 0004 0576 5395Department of Paediatrics, University of Patras, Patras, Greece
| | - Gabriel Dimitriou
- grid.11047.330000 0004 0576 5395Department of Paediatrics, University of Patras, Patras, Greece
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Shalish W, Keszler M, Davis PG, Sant'Anna GM. Decision to extubate extremely preterm infants: art, science or gamble? Arch Dis Child Fetal Neonatal Ed 2022; 107:105-112. [PMID: 33627331 DOI: 10.1136/archdischild-2020-321282] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/28/2021] [Accepted: 02/08/2021] [Indexed: 12/15/2022]
Abstract
In the modern era of neonatology, mechanical ventilation has been restricted to a smaller and more immature population of extremely preterm infants. Given the adverse outcomes associated with mechanical ventilation, every effort is made to extubate these infants as early as possible. However, the scientific basis for determining extubation readiness remains imprecise and primarily guided by clinical judgement, which is highly variable and subjective. In the absence of accurate tools to assess extubation readiness, many infants fail their extubation attempt and require reintubation, which also increases complications. Recent advances in the field have led to unravelling some of the complexities surrounding extubation in this population. This review aims to synthesise the available knowledge and provide a more evidence-based approach towards the reporting of extubation outcomes and assessment of extubation readiness in extremely preterm infants.
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Affiliation(s)
- Wissam Shalish
- Pediatrics, McGill University Health Centre, Montreal, Quebec, Canada
| | - Martin Keszler
- Pediatrics, Women and Infants Hospital, Brown University, Providence, Rhode Island, USA
| | - Peter G Davis
- Newborn Research, The Royal Women's Hospital, Melbourne, Victoria, Australia
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Diaphragmatic electromyography during a spontaneous breathing trial to predict extubation failure in preterm infants. Pediatr Res 2022; 92:1064-1069. [PMID: 35523885 PMCID: PMC9586868 DOI: 10.1038/s41390-022-02085-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 03/04/2022] [Accepted: 03/26/2022] [Indexed: 12/02/2022]
Abstract
BACKGROUND Premature attempts at extubation and prolonged episodes of ventilatory support in preterm infants have adverse outcomes. The aim of this study was to determine whether measuring the electrical activity of the diaphragm during a spontaneous breathing trial (SBT) could predict extubation failure in preterm infants. METHODS When infants were ready for extubation, the electrical activity of the diaphragm was measured by transcutaneous electromyography (EMG) before and during a SBT when the infants were on endotracheal continuous positive airway pressure. RESULTS Forty-eight infants were recruited (median (IQR) gestational age of 27.2 (25.6-30.4) weeks). Three infants did not pass the SBT and 13 failed extubation. The amplitude of the EMG increased during the SBT [2.3 (1.5-4.2) versus 3.5 (2.1-5.3) µV; p < 0.001]. In the whole cohort, postmenstrual age (PMA) was the strongest predictor for extubation failure (area under the curve (AUC) 0.77). In infants of gestational age <29 weeks, the percentage change of the EMG predicted extubation failure with an AUC of 0.74 while PMA was not associated with the outcome of extubation. CONCLUSIONS In all preterm infants, PMA was the strongest predictor of extubation failure; in those born <29 weeks of gestation, diaphragmatic electromyography during an SBT was the best predictor of extubation failure. IMPACT Composite assessments of readiness for extubation may be beneficial in the preterm population. Diaphragmatic electromyography measured by surface electrodes is a non-invasive technique to assess the electrical activity of the diaphragm. Postmenstrual age was the strongest predictor of extubation outcome in preterm infants. The change in diaphragmatic activity during a spontaneous breathing trial in extremely prematurely born infants can predict subsequent extubation failure with moderate sensitivity and specificity.
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Hunt KA, Hunt I, Ali K, Dassios T, Greenough A. Prediction of extubation success using the diaphragmatic electromyograph results in ventilated neonates. J Perinat Med 2020; 48:609-614. [PMID: 32598319 DOI: 10.1515/jpm-2020-0129] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/05/2020] [Indexed: 11/15/2022]
Abstract
Objectives Extubation failure is common in infants and associated with complications. Methods A prospective study was undertaken of preterm and term born infants. Diaphragm electromyogram (EMG) was measured transcutaneously for 15-60 min prior to extubation. The EMG results were related to tidal volume (Tve) to calculate the neuroventilatory efficiency (NVE). Receiver operating characteristic curves (ROC) were constructed and areas under the ROCs (AUROC) calculated. Results Seventy-two infants, median gestational age 28 (range 23-42) weeks were included; 15 (21%) failed extubation. Infants successfully extubated were more mature at birth (p=0.001), of greater corrected gestational age (CGA) at extubation (p<0.001) and heavier birth weight (p=0.005) than those who failed extubation. The amplitude and area under the curve of the diaphragm EMG were not significantly different between those who were and were not successfully extubated. Those successfully extubated required a significantly lower inspired oxygen and had higher expiratory tidal volumes (Tve) and NVE. The CGA and Tve had AUROCs of 0.83. A CGA of >29.6 weeks had the highest combined sensitivity (86%) and specificity (80%) in predicting extubation success. Conclusions Although NVE differed significantly between those who did and did not successfully extubate, CGA was the best predictor of extubation success.
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Affiliation(s)
- Katie A Hunt
- Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Ian Hunt
- Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Kamal Ali
- Neonatal Intensive Care Centre, King's College Hospital NHS Foundation Trust, London, UK
| | - Theodore Dassios
- Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK.,Neonatal Intensive Care Centre, King's College Hospital NHS Foundation Trust, London, UK
| | - Anne Greenough
- Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK.,The Asthma UK Centre in Allergic Mechanisms of Asthma, Kings College London, London, UK.,NIHR Biomedical Research Centre at Guy's and St Thomas 'NHS Foundation Trust and King's College London, London, UK
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Zhang Z, Xue Y, Li HH, Li YM. [Research advances in validity of predictors for extubation outcome in children receiving invasive mechanical ventilation]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2019; 21:730-734. [PMID: 31315777 PMCID: PMC7389097 DOI: 10.7499/j.issn.1008-8830.2019.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 04/25/2019] [Indexed: 06/10/2023]
Abstract
The development of invasive mechanical ventilation technology provides effective respiratory support for critically ill children. However, respiratory support is not the end of treatment as the ultimate goal is successful extubation in children. At present, some evaluation indicators before extubation including rapid shallow breathing index, maximal inspiratory pressure, and work of breathing are of high clinical value in predicting adult extubation outcome, but their evidence of evidence-based medicine is not sufficient in the field of pediatric intensive care. This paper reviews the current research on the validity of predictors for extubation outcomes in children. It shows that there is still a lack of indicators with good sensitivity and specificity for assessment before extubation in children. The studies are still in a small-sample size and single-center stage. Therefore, how to optimize evaluation before extubation and improve the success rate of extubation is the direction of joint efforts of doctors in the pediatric intensive care unit and rehabilitation medicine department.
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Affiliation(s)
- Zhen Zhang
- Pediatric Intensive Care Unit, First Hospital of Jilin University, Changchun 130021, China.
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Shalish W, Latremouille S, Papenburg J, Sant'Anna GM. Predictors of extubation readiness in preterm infants: a systematic review and meta-analysis. Arch Dis Child Fetal Neonatal Ed 2019. [PMID: 29519808 DOI: 10.1136/archdischild-2017-313878] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
CONTEXT A variety of extubation readiness tests have already been incorporated into clinical practice in preterm infants. OBJECTIVE To identify predictor tests of successful extubation and determine their accuracy compared with clinical judgement alone. METHODS MEDLINE, Embase, PubMed, Cochrane Library and Web of Science were searched between 1984 and June 2016. Studies evaluating predictors of extubation success during a period free of mechanical inflations in infants less than 37 weeks' gestation were included. Risk of bias was assessed using the Quality Assessment of Diagnostic Accuracy Studies-2 tool. After identifying and describing all predictor tests, pooled sensitivity and specificity estimates for the different test categories were generated using a bivariate random-effects model. RESULTS Thirty-five studies were included, showing wide heterogeneities in population characteristics, methodologies and definitions of extubation success. Assessments ranged from a few seconds to 24 hours, provided 0-6 cmH2O positive end-expiratory pressure and measured several clinical and/or physiological parameters. Thirty-one predictor tests were identified, showing good sensitivities but low and variable specificities. Given the high variation in test definitions across studies, pooling could only be performed on a subset. The commonly performed spontaneous breathing trials had pooled sensitivity of 95% (95% CI 87% to 99%) and specificity of 62% (95% CI 38% to 82%), while composite tests offered the best performance characteristics. CONCLUSIONS There is a lack of strong evidence to support the use of extubation readiness tests in preterm infants. Although spontaneous breathing trials are attractive assessment tools, higher quality studies are needed for determining the optimal strategies for improving their accuracy.
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Affiliation(s)
- Wissam Shalish
- Department of Pediatrics, Neonatal Division, McGill University Health Center, Montreal, Quebec, Canada
| | - Samantha Latremouille
- Department of Pediatrics, Neonatal Division, McGill University Health Center, Montreal, Quebec, Canada
| | - Jesse Papenburg
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
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Miyake F, Suga R, Akiyama T, Namba F. An in vitro evaluation of the influence of neonatal endotracheal tube diameter and length on the work of breathing. Paediatr Anaesth 2018; 28:458-462. [PMID: 29633434 DOI: 10.1111/pan.13366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/25/2018] [Indexed: 11/26/2022]
Abstract
BACKGROUND Neonates, particularly premature babies, are often managed with endotracheal intubation and subsequent mechanical ventilation to maintain adequate pulmonary gas exchange. There is no consensus on the standard length of endotracheal tube. Although a short tube reduces resistance and respiratory dead space, it is believed to increase the risk of accidental extubation. There are not entirely coherent data regarding the effect of endotracheal tube length on work of breathing in infants. AIM The aim of this study was to evaluate the impact of neonatal endotracheal tube diameter and length on the work of breathing using an infant in vitro lung model. METHOD We assessed the work of breathing index and mechanical ventilation settings with various endotracheal tube diameters and lengths using the JTR100 in vitro infant lung model. The basic parameters of the model were breathing frequency of 20 per minutes, inspiratory-expiratory ratio of 1:3, and positive end-expiratory pressure of 5 cmH2 O. In addition, the diaphragm driving pressure to maintain the set tidal volume was measured as the work of breathing index. The JTR100 was connected to the Babylog 8000plus through the endotracheal tube. Finally, we monitored the peak inspiratory pressure generated during assist-control volume guarantee mode with a targeted tidal volume of 10-30 mL. RESULTS The diaphragm driving pressure using a 2.0-mm inner diameter tube was twice as high as that using a 4.0-mm inner diameter tube. To maintain the targeted tidal volume, a shorter tube reduced both the diaphragm driving pressure and ventilator-generated peak inspiratory pressure. The difference in the generated peak inspiratory pressure between the shortest and longest tubes was 5 cmH2 O. CONCLUSION In our infant lung model, a shorter tube resulted in a lower work of breathing and lower ventilator-generated peak inspiratory pressure.
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Affiliation(s)
- Fuyu Miyake
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Rika Suga
- Department of Clinical Engineering, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Takahiro Akiyama
- Department of Clinical Engineering, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
| | - Fumihiko Namba
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan
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13
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Mohr R, Thomas J, Cannizzaro V, Weiss M, Schmidt AR. Impact of endotracheal tube shortening on work of breathing in neonatal and pediatric in vitro lung models. Paediatr Anaesth 2017; 27:942-948. [PMID: 28653420 DOI: 10.1111/pan.13183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/02/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Work of breathing accounts for a significant proportion of total oxygen consumption in neonates and infants. Endotracheal tube inner diameter and length significantly affect airflow resistance and thus work of breathing. While endotracheal tube shortening reduces endotracheal tube resistance, the impact on work of breathing in mechanically ventilated neonates and infants remains unknown. AIM The objective of this in vitro study was to quantify the effect of endotracheal tube shortening on work of breathing in simulated pediatric lung settings. We hypothesized that endotracheal tube shortening significantly reduces work of breathing. METHODS We used the Active-Servo-Lung 5000 to simulate different clinical scenarios in mechanically ventilated infants and neonates under spontaneous breathing with and without pressure support. Endotracheal tube size, lung resistance, and compliance, as well as respiratory settings such as respiratory rate and tidal volume were weight and age adapted for each lung model. Work of breathing was measured before and after maximal endotracheal tube shortening and the reduction of the daily energy demand calculated. RESULTS Tube shortening with and without pressure support decreased work of breathing to a maximum of 10.1% and 8.1%, respectively. As a result, the calculated reduction of total daily energy demand by endotracheal tube shortening was between 0.002% and 0.02%. CONCLUSION In this in vitro lung model, endotracheal tube shortening had minimal effects on work of breathing. Moreover, the calculated percentage reduction of the total daily energy demand after endotracheal tube shortening was minimal.
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Affiliation(s)
- Rebecca Mohr
- Department of Anaesthesia, University Children's Hospital of Zurich, Zurich, Switzerland.,Children's Research Centre, University Children's Hospital of Zurich, Zurich, Switzerland
| | - Jörg Thomas
- Department of Anaesthesia, University Children's Hospital of Zurich, Zurich, Switzerland.,Children's Research Centre, University Children's Hospital of Zurich, Zurich, Switzerland
| | - Vincenzo Cannizzaro
- Children's Research Centre, University Children's Hospital of Zurich, Zurich, Switzerland.,Department of Intensive Care Medicine and Neonatology, University Children's Hospital of Zurich, Zurich, Switzerland
| | - Markus Weiss
- Department of Anaesthesia, University Children's Hospital of Zurich, Zurich, Switzerland.,Children's Research Centre, University Children's Hospital of Zurich, Zurich, Switzerland
| | - Alexander R Schmidt
- Department of Anaesthesia, University Children's Hospital of Zurich, Zurich, Switzerland.,Children's Research Centre, University Children's Hospital of Zurich, Zurich, Switzerland.,Department of Intensive Care Medicine and Neonatology, University Children's Hospital of Zurich, Zurich, Switzerland
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14
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Shalish W, Kanbar LJ, Rao S, Robles-Rubio CA, Kovacs L, Chawla S, Keszler M, Precup D, Brown K, Kearney RE, Sant'Anna GM. Prediction of Extubation readiness in extremely preterm infants by the automated analysis of cardiorespiratory behavior: study protocol. BMC Pediatr 2017; 17:167. [PMID: 28716018 PMCID: PMC5512825 DOI: 10.1186/s12887-017-0911-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 06/29/2017] [Indexed: 11/10/2022] Open
Abstract
Background Extremely preterm infants (≤ 28 weeks gestation) commonly require endotracheal intubation and mechanical ventilation (MV) to maintain adequate oxygenation and gas exchange. Given that MV is independently associated with important adverse outcomes, efforts should be made to limit its duration. However, current methods for determining extubation readiness are inaccurate and a significant number of infants fail extubation and require reintubation, an intervention that may be associated with increased morbidities. A variety of objective measures have been proposed to better define the optimal time for extubation, but none have proven clinically useful. In a pilot study, investigators from this group have shown promising results from sophisticated, automated analyses of cardiorespiratory signals as a predictor of extubation readiness. The aim of this study is to develop an automated predictor of extubation readiness using a combination of clinical tools along with novel and automated measures of cardiorespiratory behavior, to assist clinicians in determining when extremely preterm infants are ready for extubation. Methods In this prospective, multicenter observational study, cardiorespiratory signals will be recorded from 250 eligible extremely preterm infants with birth weights ≤1250 g immediately prior to their first planned extubation. Automated signal analysis algorithms will compute a variety of metrics for each infant, and machine learning methods will then be used to find the optimal combination of these metrics together with clinical variables that provide the best overall prediction of extubation readiness. Using these results, investigators will develop an Automated system for Prediction of EXtubation (APEX) readiness that will integrate the software for data acquisition, signal analysis, and outcome prediction into a single application suitable for use by medical personnel in the neonatal intensive care unit. The performance of APEX will later be prospectively validated in 50 additional infants. Discussion The results of this research will provide the quantitative evidence needed to assist clinicians in determining when to extubate a preterm infant with the highest probability of success, and could produce significant improvements in extubation outcomes in this population. Trial registration Clinicaltrials.gov identifier: NCT01909947. Registered on July 17 2013. Trial sponsor: Canadian Institutes of Health Research (CIHR). Electronic supplementary material The online version of this article (doi:10.1186/s12887-017-0911-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Wissam Shalish
- Department of Pediatrics, Division of Neonatology, Montreal Children's Hospital, McGill University, 1001 Boul. Décarie, room B05.2714. Montreal, Quebec, H4A 3J1, Canada
| | - Lara J Kanbar
- Department of Biomedical Engineering, McGill University, Montreal, Quebec, H3A 2B4, Canada
| | - Smita Rao
- Department of Pediatrics, Division of Neonatology, Montreal Children's Hospital, McGill University, 1001 Boul. Décarie, room B05.2714. Montreal, Quebec, H4A 3J1, Canada
| | - Carlos A Robles-Rubio
- Department of Biomedical Engineering, McGill University, Montreal, Quebec, H3A 2B4, Canada
| | - Lajos Kovacs
- Department of Neonatology, Jewish General Hospital, Montreal, Quebec, H3T 1E2, Canada
| | - Sanjay Chawla
- Division of Neonatal-Perinatal Medicine, Hutzel Women's Hospital, Wayne State University, Detroit, MI, 48201, USA
| | - Martin Keszler
- Department of Pediatrics, Women and Infants Hospital of Rhode Island, Brown University, Providence, RI, 02905, USA
| | - Doina Precup
- Department of Computer Science, McGill University, Montreal, Quebec, H3A 0E9, Canada
| | - Karen Brown
- Department of Anesthesia, Montreal Children's Hospital, McGill University Health Center, Montreal, Quebec, H4A 3J1, Canada
| | - Robert E Kearney
- Department of Biomedical Engineering, McGill University, Montreal, Quebec, H3A 2B4, Canada
| | - Guilherme M Sant'Anna
- Department of Pediatrics, Division of Neonatology, Montreal Children's Hospital, McGill University, 1001 Boul. Décarie, room B05.2714. Montreal, Quebec, H4A 3J1, Canada.
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15
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Dassios T, Kaltsogianni O, Greenough A. Relaxation Rate of the Respiratory Muscles and Prediction of Extubation Outcome in Prematurely Born Infants. Neonatology 2017; 112:251-257. [PMID: 28704815 DOI: 10.1159/000477233] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/02/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND Accurate prediction of extubation outcome could result in a significant reduction of respiratory morbidity in premature neonates. OBJECTIVES To assess whether the respiratory muscle time constant of relaxation (τ) predicted extubation outcome in mechanically ventilated, premature infants. METHODS Forty-six mechanically ventilated infants with a median gestational age of 26 (interquartile range [IQR] 25-29) weeks were prospectively studied. τ was calculated from the reciprocal of the slope of the decline in airway pressure as a function of time. Measurements of τ were done during 5-10 min of a spontaneous breathing test (SBT) prior to extubation. During the first and last minute of the SBT, τ1 and τ2, respectively, were assessed, and the difference between them was calculated (Δτ). RESULTS The median τ2 was significantly higher in infants whose extubation failed (20.7 [IQR 12.9-34.7] s/cm H2O) than in infants whose extubation succeeded (8.2 [IQR 6.2-17.8] s/cm H2O, p = 0.002). The median Δτ was significantly higher in infants whose extubation failed (10.3 [IQR 4.4-23.9] s/cm H2O) than in infants whose extubation succeeded (-1.63 [IQR -5.7 to 0.3] s/cm H2O, p = 0.001). Extubation failure was associated with τ2 (p = 0.011) and Δτ (p = 0.010) after correcting for postmenstrual age, patent ductus arteriosus, and intraventricular haemorrhage. Receiver operator characteristic curve analysis demonstrated that Δτ predicted extubation failure with an area under the curve of 0.937. A Δτ of +1.02 s/cm H2O predicted extubation failure with 94% sensitivity and 83% specificity. CONCLUSIONS The respiratory muscle time constant of relaxation during an SBT was significantly greater in infants whose extubation failed and could be used to predict extubation outcome in prematurely born infants.
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Affiliation(s)
- Theodore Dassios
- Neonatal Intensive Care Centre, King's College Hospital NHS Foundation Trust, London, UK
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