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Deana C, Gunst J, De Rosa S, Umbrello M, Danielis M, Biasucci DG, Piani T, Cotoia A, Molfino A, Vetrugno L. Bioimpedance-assessed muscle wasting and its relation to nutritional intake during the first week of ICU: a pre-planned secondary analysis of Nutriti Study. Ann Intensive Care 2024; 14:29. [PMID: 38367198 PMCID: PMC10874356 DOI: 10.1186/s13613-024-01262-w] [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: 11/25/2023] [Accepted: 02/12/2024] [Indexed: 02/19/2024] Open
Abstract
BACKGROUND Muscle mass evaluation in ICU is crucial since its loss is related with long term complications, including physical impairment. However, quantifying muscle wasting with available bedside tools (ultrasound and bioimpedance analysis) must be more primarily understood. Bioimpedance analysis (BIA) provides estimates of muscle mass and phase angle (PA). The primary aim of this study was to evaluate muscle mass changes with bioimpedance analysis during the first 7 days after ICU admission. Secondary aims searched for correlations between muscular loss and caloric and protein debt. METHODS Patients with an expected ICU-stay ≥ 72 h and the need for artificial nutritional support were evaluated for study inclusion. BIA evaluation of muscle mass and phase angle were performed at ICU admission and after 7 days. Considering the difference between ideal caloric and protein targets, with adequate nutritional macronutrients delivered, we calculated the caloric and protein debt. We analyzed the potential correlation between caloric and protein debt and changes in muscle mass and phase angle. RESULTS 72 patients from September 1st to October 30th, 2019 and from August 1st to October 30th, 2021 were included in the final statistical analysis. Median age was 68 [59-77] years, mainly men (72%) admitted due to respiratory failure (25%), and requiring invasive mechanical ventilation for 7 [4-10] days. Median ICU stay was 8 [6-12] days. Bioimpedance data at ICU admission and after 7 days showed that MM and PA resulted significantly reduced after 7 days of critically illness, 34.3 kg vs 30.6 kg (p < 0.0001) and 4.90° vs 4.35° (p = 0.0004) respectively. Mean muscle loss was 3.84 ± 6.7 kg, accounting for 8.4% [1-14] MM reduction. Correlation between caloric debt (r = 0.14, p = 0.13) and protein debt (r = 0.18, p = 0.13) with change in MM was absent. Similarly, no correlation was found between caloric debt (r = -0.057, p = 0.631) and protein debt (r = -0.095, p = 0.424) with changes in PA. CONCLUSIONS bioimpedance analysis demonstrated that muscle mass and phase angle were significantly lower after 7 days in ICU. The total amount of calories and proteins does not correlate with changes in muscle mass and phase angle.
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Affiliation(s)
- Cristian Deana
- Anesthesia and Intensive Care 1, Department of Anesthesia and Intensive Care, Health Integrated Agency of Friuli Centrale, Piazzale S. M. Della Misericordia 15, 33100, Udine, Italy.
| | - Jan Gunst
- Laboratory of Intensive-Care Medicine, Department of Cellular and Molecular Medicine, Louvain, Belgium
- Department of Intensive Care Medicine, University Hospitals Leuven, Louvain, Belgium
| | - Silvia De Rosa
- Centre for Medical Sciences - CISMed, University of Trento, Trento, Italy
- Anesthesia and Intensive Care, Santa Chiara Regional Hospital, APSS Trento, Trento, Italy
| | - Michele Umbrello
- Department of Intensive Care and Anaesthesia, ASST Ovest Milanese, Legnano Hospital, Milan, Italy
| | - Matteo Danielis
- Laboratory of Studies and Evidence Based Nursing, Department of Cardiac, Vascular Sciences and Public Health, University of Padua, ThoracicPadua, Italy
| | - Daniele Guerino Biasucci
- Department of Clinical Science and Translational Medicine, 'Tor Vergata' University of Rome, Rome, Italy
| | - Tommaso Piani
- Health Professions Staff, Health Integrated Agency of Friuli Centrale, Udine, Italy
| | - Antonella Cotoia
- Department of Medical and Surgical Sciences, Anesthesia and Intensive Care Unit, Policlinico Riuniti Foggia, University of Foggia, Foggia, Italy
| | - Alessio Molfino
- Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Luigi Vetrugno
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy
- Department of Anesthesiology, Critical Care Medicine and Emergency, SS. Annunziata Hospital, Chieti, Italy
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Lima J, Foletto E, Cardoso RCB, Garbelotto C, Frenzel AP, Carneiro JU, Carpes LS, Barbosa-Silva TG, Gonzalez MC, Silva FM. Ultrasound for measurement of skeletal muscle mass quantity and muscle composition/architecture in critically ill patients: A scoping review on studies' aims, methods, and findings. Clin Nutr 2024; 43:95-110. [PMID: 38016244 DOI: 10.1016/j.clnu.2023.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 10/24/2023] [Accepted: 11/06/2023] [Indexed: 11/30/2023]
Abstract
AIMS This scoping review aimed to identify, explore, and map the objectives, methodological aspects, and results of studies that used ultrasound (US) to assess skeletal muscle (SM) in critically ill patients. METHODS A scoping review was conducted according to the Joanna Briggs Institute's methodology. All studies that evaluated SM parameters from the US in patients admitted to the intensive care unit (ICU) were considered eligible. We categorized muscle thickness and cross-sectional area as parameters for assessing SM quantity, while echogenicity, fascicle length, and pennation angle analysis were used to evaluate muscle "quality" (composition/architecture). A literature search was conducted using four databases for articles published until December 2022. Independent reviewers selected the studies and extracted data. Descriptive statistics were calculated to present the results. RESULTS A total of 107 studies were included, the majority of which were prospective cohort studies (59.8 %) conducted in general ICUs (49.5 %). The most frequent objective of the studies was to evaluate SM quantity depletion during the ICU stay (25.2 %), followed by determining whether a specific intervention would modify SM (21.5 %). Most studies performed serial SM evaluations (76.1 %). The rectus femoris muscle thickness was evaluated in most studies (67.9 %), followed by the rectus femoris cross-sectional area (54.3 %) and the vastus intermedius muscle thickness (40.2 %). The studies demonstrated the feasibility and reproducibility of US for SM evaluation, especially related to quantitative parameters. Most studies (70.3 %) reported significant SM quantity depletion during hospitalization. However, the accuracy of the US in measuring SM varied across the studies. CONCLUSIONS The lack of detailed description and standardization in the protocols adopted by the studies included in this scoping review precludes the translation of the evidence related to US for SM assessment into clinical practice.
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Affiliation(s)
- Júlia Lima
- Nutrition Science Graduate Program, Federal University of Health Sciences of Porto Alegre, Porto Alegre Brazil
| | - Estéfani Foletto
- Nutrition Course, Department, Federal University of Health Sciences of Porto Alegre, Porto Alegre Brazil
| | - Rafaella C B Cardoso
- Nutrition Course, Department, Federal University of Health Sciences of Porto Alegre, Porto Alegre Brazil
| | - Charlles Garbelotto
- Nutrition Course, Department, Federal University of Health Sciences of Porto Alegre, Porto Alegre Brazil
| | - Aline P Frenzel
- Postgraduate Program in Health and Behavior, Catholic University of Pelotas, Pelotas Brazil
| | - Juliana U Carneiro
- Multiprofessional Residency Program: Intensive Care. Federal University of Health Sciences of Porto Alegre, Porto Alegre Brazil
| | - Larissa S Carpes
- Santa Casa de Misericórdia de Porto Alegre Hospital, Porto Alegre Brazil
| | - Thiago G Barbosa-Silva
- Department of General Surgery, Faculty of Medicine, Federal University of Pelotas, Pelotas Brazil
| | | | - Flávia M Silva
- Nutrition Department and Nutrition Science Graduate Program. Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre Brazil.
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Temporal evolution of diaphragm thickness and diaphragm excursion among subjects hospitalized with COVID-19: A prospective observational study. Respir Med Res 2023; 83:100960. [PMID: 36563547 PMCID: PMC9770987 DOI: 10.1016/j.resmer.2022.100960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/09/2022] [Accepted: 09/26/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has an affinity for the angiotensin-converting enzyme 2 (ACE2) receptors, which are present abundantly on the diaphragm. This study aims to describe temporal changes in diaphragmatic thickness and excursion using ultrasonography in subjects with acute COVID-19. METHODS This prospective observational study included adults hospitalized with COVID-19 in the past 48 hours. The diaphragm thickness at end-expiration (DTE), diaphragm thickening fraction (DTF), and diaphragm excursion during tidal breathing (DE) and maximal inspiration (DEmax) were measured using ultrasonography daily for 5 days. The changes in DTE, DTF, DE, and Demax from day 1 to day 5 were assessed. RESULTS This study included 64 adults (62.5% male) with a mean (SD) age of 50.2 (17.5) years. A majority (91%) of the participants had mild or moderate illness. The median (IQR) DTE, DTF (%), DE and Demax on day 1 were 2.2 (1.9, 3.0) mm, 21.5% (14.2, 31.0), 19.2 (16.5, 24.0) mm, and 26.7 (22.0, 30.2) mm, respectively. On day 5, there was a significant reduction in the DTE (p=0.002) with a median (IQR) percentage change of -15.7% (-21.0, 0.0). The DTF significantly increased on day 5 with a median (IQR) percentage change of 25.0% (-19.2, 98.4), p=0.03. There was no significant change in DE and Demax from day 1 to day 5, with a median (IQR) percentage change of 3.6% (-5.2, 15) and 0% (-6.7, 5.9), respectively. CONCLUSIONS Non-intubated patients with COVID-19 exhibited a temporal decline in diaphragm thickness with increase in thickening fraction over 5 days of hospital admission. Further research is warranted to assess the impact of COVID-19 pneumonia on diaphragmatic function.
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Ultrasonographic Assessment of Diaphragmatic Function and Its Clinical Application in the Management of Patients with Acute Respiratory Failure. Diagnostics (Basel) 2023; 13:diagnostics13030411. [PMID: 36766515 PMCID: PMC9914801 DOI: 10.3390/diagnostics13030411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/17/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
Acute respiratory failure (ARF) is a common life-threatening medical condition, with multiple underlying etiologies. In these cases, many factors related to systemic inflammation, prolonged use of steroids, and lung mechanical abnormalities (such as hyperinflation or increased elastic recoil due to pulmonary oedema or fibrosis) may act as synergic mechanisms leading to diaphragm dysfunction. The assessment of diaphragm function with ultrasound has been increasingly investigated in the emergency department and during hospital stay as a valuable tool for providing additional anatomical and functional information in many acute respiratory diseases. The diaphragmatic ultrasound is a noninvasive and repeatable bedside tool, has no contraindications, and allows the physician to rapidly assess the presence of diaphragmatic dysfunction; this evaluation may help in estimating the need for mechanical ventilation (and the risk of weaning failure), as well as the risk of longer hospital stay and higher mortality rate. This study presents an overview of the recent evidence regarding the evaluation of diaphragmatic function with bedside ultrasound and its clinical applications, including a discussion of real-life clinical cases.
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Rectus Femoris Muscle and Phase Angle as Prognostic Factor for 12-Month Mortality in a Longitudinal Cohort of Patients with Cancer (AnyVida Trial). Nutrients 2023; 15:nu15030522. [PMID: 36771229 PMCID: PMC9919732 DOI: 10.3390/nu15030522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Cancer-related malnutrition is still unrecognized and undertreated in clinical practice. The morphofunctional assessment of disease-related malnutrition (DRM) is a new approach that focuses on evaluating changes in body composition and function. The aim of this study is to evaluate the prognostic value of classic and emerging assessment of malnutrition at 12-months survival in cancer patients. METHODS We conducted a prospective study on cancer outpatients. Bioelectrical impedance with phase angle (PhA), nutritional ultrasound by rectus femoris cross-sectional area (RFCSA), hand grip strength, and "Timed Up and Go Test" (TUG) were evaluated as predictors of mortality. RESULTS Fifty-seven patients were included. The non-survivors had lower PhA values than the survivors (4.7° vs. 5.4°; p < 0.001), and we had the same results with RFCSA 2.98 cm2/m2 vs. 4.27 cm2/m2 (p = 0.03). Cut-off points were identified using the ROC (receiver operating characteristic) curves for PhA (≤5.6° cancer patients, ≤5.9° men, ≤5.3° women), RFCSA (≤4.47 cm2/m2 cancer patients, ≤4.47° men, ≤2.73° women) and rectus femoris-Y-axis (RF-Y-axis; ≤1.3 cm cancer patients, ≤1.06 men, ≤1 women). In multivariate logistic regression analysis, we found that high PhA was significantly associated with a lower mortality hazard ratio (HR: 0.42 95% CI: 0.21-0.84, p = 0.014). Likewise, high RFCSA was associated with a decrease in mortality risk in the crude model (HR: 0.61 95% CI: 0.39-0.96, p = 0.031). This trend was also maintained in the adjusted models by the confounding variables. CONCLUSIONS Low PhA and RFCSA values are significant independent predictors of mortality in cancer patients. These cut-off points are clinical data that can be used for nutritional assessment and the prediction of clinical outcomes.
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Zheng WH, Zhao YH, Yao Y, Huang HB. Prognostic role of bioelectrical impedance phase angle for critically ill patients: A systemic review and meta-analysis. Front Med (Lausanne) 2023; 9:1059747. [PMID: 36698812 PMCID: PMC9868673 DOI: 10.3389/fmed.2022.1059747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 12/21/2022] [Indexed: 01/11/2023] Open
Abstract
Objective Bioelectrical impedance-derived phase angle (PA) has exhibited good prognostic values in several non-critical illnesses. However, its predictive value for critically ill patients remains unclear. Thus, we aimed to perform a systematic review and meta-analysis to investigate the relationship between PA and survival in such a patient population. Materials and methods We searched for relevant studies in PubMed, Embase, and the Cochrane database up to Jan 20, 2022. Meta-analyses were performed to determine the association between the baseline PA after admission with survival. We further conducted subgroup analyses and sensitivity analyses to explore the sources of heterogeneity. Results We included 20 studies with 3,770 patients. Patients with low PA were associated with a significantly higher mortality risk than those with normal PA (OR 2.45, 95% CI 1.97-3.05, P < 0.00001). Compared to survivors, non-survivors had lower PA values (MD 0.82°, 95% CI 0.66-0.98; P < 0.00001). Similar results were also found when pooling studies reported regression analyses of PA as continuous (OR = 0.64; 95% CI 0.52-0.79, P < 0.00001) or categorical variable (OR = 2.42; 95% CI 1.76-3.34; P < 0.00001). These results were further confirmed in subgroup analyses and sensitivity analyses. Conclusion Our results indicated that PA may be an important prognostic factor of survival in critically ill patients and can nicely complement the deficiencies of other severity scoring systems in the ICU setting.
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Affiliation(s)
- Wen-He Zheng
- Department of Critical Care Medicine, Rehabilitation Hospital Affiliated to Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Yi-He Zhao
- Department of Critical Care Medicine, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Yan Yao
- Department of Critical Care Medicine, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Hui-Bin Huang
- Department of Critical Care Medicine, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China,*Correspondence: Hui-Bin Huang,
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Rebranding Nutritional Care for Critically Ill Patients. J Crit Care Med (Targu Mures) 2023; 9:3-5. [PMID: 36890972 PMCID: PMC9987271 DOI: 10.2478/jccm-2023-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/10/2023] Open
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Lima J, Eckert I, Gonzalez MC, Silva FM. Prognostic value of phase angle and bioelectrical impedance vector in critically ill patients: A systematic review and meta-analysis of observational studies. Clin Nutr 2022; 41:2801-2816. [PMID: 36395589 DOI: 10.1016/j.clnu.2022.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 09/21/2022] [Accepted: 10/14/2022] [Indexed: 01/27/2023]
Abstract
BACKGROUND AND AIMS Assessment of the raw parameters derived from bioelectrical impedance analysis (BIA) has gained emphasis in critically ill patients. The phase angle (PhA) reflects the integrity of the cell membrane, and bioelectrical impedance vector analysis (BIVA) is indicative of patients' hydration status. The aim of this study was to investigate whether these parameters are associated with clinical outcomes in the intensive care unit (ICU) setting. METHODS We conducted a systematic review with meta-analysis. We searched PubMed, Embase, Scopus and Web of Science for all published observational studies without language restrictions up to April 2022. Two reviewers independently performed study selection and data extraction. We judged the risk of bias by the Newcastle-Ottawa Scale and the certainty of evidence by the GRADE approach. Mortality was the primary outcome. Secondary outcomes included ICU length of stay, hospital length of stay, duration of mechanical ventilation, nutritional risk, and malnutrition. A meta-analysis with a random-effect model was performed to combine data on R version 3.6.2. RESULTS Twenty-seven studies were included in the systematic review (4872 participants). Pooled analysis revealed that patients with low PhA had a higher risk of death (14 studies; RR = 1.82, 95% CI 1.46 to 2.26; I2 = 42%) and spent more days in ICU (6 studies; MD = 1.79, 95% CI 0.33 to 3.24, I2 = 69%) in comparison to patients with normal PhA. The pooled analysis also showed higher PhA values in survivors compared to non-survivor patients (12 studies; MD = 0.75°, 95% CI 0.60° to 0.91°, I2 = 31%). Overhydration defined by BIVA was not a predictor of mortality (4 studies; RR = 1.01, 95% CI 0.70 to 1.46; I2 = 0%). More than 40% of primary studies were classified with a high risk of bias, and the quality of evidence ranged from low to very low. CONCLUSIONS This meta-analysis revealed, with limited evidence, that low PhA was associated with higher mortality and ICU length of stay, while overhydration identified by BIVA was not a predictor of death in critically ill patients.
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Affiliation(s)
- Júlia Lima
- Master Student at Nutrition Science Graduate Program Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil
| | | | - Maria Cristina Gonzalez
- Professor at Graduate Program in Health and Behavior, Catholic University of Pelotas, Rio Grande do Sul, Brazil
| | - Flávia Moraes Silva
- Professor at Nutrition Department and Nutrition Science Graduate Program of Federal University of Health Science of Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.
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Paolo F, Valentina DG, Silvia C, Tommaso P, Elena C, Martin D, Marini John J, Davide C. The possible predictive value of muscle ultrasound in the diagnosis of ICUAW in long-term critically ill patients. J Crit Care 2022; 71:154104. [DOI: 10.1016/j.jcrc.2022.154104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 06/09/2022] [Accepted: 06/20/2022] [Indexed: 12/25/2022]
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Tetamo R, Fittipaldi C, Buono S, Umbrello M. Nutrition support for critically ill patients during the COVID-19 pandemic: the Italian SIAARTI survey. JOURNAL OF ANESTHESIA, ANALGESIA AND CRITICAL CARE 2022. [PMCID: PMC9361260 DOI: 10.1186/s44158-022-00063-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background
Critically ill, COVID-19 patients are characterized by a hypermetabolic state and a reduced food intake and are at high risk of malnutrition and lean body mass loss. An appropriate metabolic-nutritional intervention aims to reduce complications and improve the clinical outcomes. We conducted a cross-sectional, multicenter, observational, nationwide online survey involving Italian Intensivists to assess the nutritional practices in critically ill patients with COVID-19. Results A group of experts in nutrition of the Italian Society of Anaesthesia Analgesia Resuscitation and Intensive Care (SIAARTI) developed a 24-item questionnaire; the 9000 members of the Society were invited to participate through emails and social networks. Data was collected from June 1 to August 1, 2021. A total of 545 responses were collected: 56% in northern, 25% in central, and 20% in southern Italy. Artificial nutrition support is directly handled by intensivists in > 90 of the cases; the nutritional status is assessed as suggested by the guidelines in more than 70% of the cases, and a form of nutrition support is started within the first 48 h from ICU admission by > 90% of the respondents. Nutritional targets are reached in 4–7 days in > 75% of the cases, mainly by the enteral route. Indirect calorimetry, muscle ultrasound, and bioimpedance analysis are used by a limited part of the interviewees. Only about a half of the respondents reported the nutritional issues in the ICU discharge summary. Conclusions This survey among Italian Intensivists during the COVID-19 epidemic showed how the beginning, progression, and route of nutritional support adhere to international recommendations, while recommendations on the tools to set the target and monitor the efficacy of the metabolic support are less followed. Supplementary Information The online version contains supplementary material available at 10.1186/s44158-022-00063-6.
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Lecronier M, Jung B, Molinari N, Pinot J, Similowski T, Jaber S, Demoule A, Dres M. Severe but reversible impaired diaphragm function in septic mechanically ventilated patients. Ann Intensive Care 2022; 12:34. [PMID: 35403916 PMCID: PMC9001790 DOI: 10.1186/s13613-022-01005-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/18/2022] [Indexed: 11/17/2022] Open
Abstract
Background Whether sepsis-associated diaphragm dysfunction may improve despite the exposure of mechanical ventilation in critically ill patients is unclear. This study aims at describing the diaphragm function time course of septic and non-septic mechanically ventilated patients. Methods Secondary analysis of two prospective observational studies of mechanically ventilated patients in whom diaphragm function was assessed twice: within the 24 h after intubation and when patients were switched to pressure support mode, by measuring the endotracheal pressure in response to bilateral anterior magnetic phrenic nerve stimulation (Ptr,stim). Change in diaphragm function was expressed as the difference between Ptr,stim measured under pressure support mode and Ptr,stim measured within the 24 h after intubation. Sepsis was defined according to the Sepsis-3 international guidelines upon inclusion. In a sub-group of patients, the right hemidiaphragm thickness was measured by ultrasound. Results Ninety-two patients were enrolled in the study. Sepsis upon intubation was present in 51 (55%) patients. In septic patients, primary reason for ventilation was acute respiratory failure related to pneumonia (37/51; 73%). In non-septic patients, main reasons for ventilation were acute respiratory failure not related to pneumonia (16/41; 39%), coma (13/41; 32%) and cardiac arrest (6/41; 15%). Ptr,stim within 24 h after intubation was lower in septic patients as compared to non-septic patients: 6.3 (4.9–8.7) cmH2O vs. 9.8 (7.0–14.2) cmH2O (p = 0.004), respectively. The median (interquartile) duration of mechanical ventilation between first and second diaphragm evaluation was 4 (2–6) days in septic patients and 3 (2–4) days in non-septic patients (p = 0.073). Between first and second measurements, the change in Ptr,stim was + 19% (− 13–61) in septic patients and − 7% (− 40–12) in non-septic patients (p = 0.005). In the sub-group of patients with ultrasound measurements, end-expiratory diaphragm thickness decreased in both, septic and non-septic patients. The 28-day mortality was higher in patients with decrease or no change in diaphragm function. Conclusion Septic patients were associated with a more severe but reversible impaired diaphragm function as compared to non-septic patients. Increase in diaphragm function was associated with a better survival. Supplementary Information The online version contains supplementary material available at 10.1186/s13613-022-01005-9.
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Affiliation(s)
- Marie Lecronier
- Médecine Intensive - Réanimation (Département "R3S"), APHP. Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France. .,Neurophysiologie Respiratoire Expérimentale et Clinique, INSERM-UMR S 1158, Sorbonne Université, Paris, France.
| | - Boris Jung
- Département de Médecine Intensive - Réanimation, CHU Montpellier, Montpellier, France.,Laboratoire de Physiologie et Médecine Expérimentale du cœur et des Muscles, INSERM U1046-CNRS UMR 9214, Université de Montpellier, Montpellier, France
| | - Nicolas Molinari
- Department of Medical Information, Hôpital Arnaud de Villeneuve, IMAG U5149, Université de Montpellier, Montpellier, France
| | - Jérôme Pinot
- Médecine Intensive - Réanimation (Département "R3S"), APHP. Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France
| | - Thomas Similowski
- Médecine Intensive - Réanimation (Département "R3S"), APHP. Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France.,Neurophysiologie Respiratoire Expérimentale et Clinique, INSERM-UMR S 1158, Sorbonne Université, Paris, France
| | - Samir Jaber
- Département de Médecine Intensive - Réanimation, CHU Montpellier, Montpellier, France.,Laboratoire de Physiologie et Médecine Expérimentale du cœur et des Muscles, INSERM U1046-CNRS UMR 9214, Université de Montpellier, Montpellier, France
| | - Alexandre Demoule
- Médecine Intensive - Réanimation (Département "R3S"), APHP. Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France.,Neurophysiologie Respiratoire Expérimentale et Clinique, INSERM-UMR S 1158, Sorbonne Université, Paris, France
| | - Martin Dres
- Médecine Intensive - Réanimation (Département "R3S"), APHP. Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France.,Neurophysiologie Respiratoire Expérimentale et Clinique, INSERM-UMR S 1158, Sorbonne Université, Paris, France
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