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González R, Maldonado F, Cornejo R. Individual PEEP in Obesity: Comment. Anesthesiology 2024; 140:1050-1051. [PMID: 38427817 DOI: 10.1097/aln.0000000000004882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Affiliation(s)
- Roberto González
- Clinical Hospital of the University of Chile, Santiago, Chile (R.G.).
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Scharffenberg M, Mandelli M, Bluth T, Simonassi F, Wittenstein J, Teichmann R, Birr K, Kiss T, Ball L, Pelosi P, Schultz MJ, Gama de Abreu M, Huhle R. Respiratory mechanics and mechanical power during low vs. high positive end-expiratory pressure in obese surgical patients - A sub-study of the PROBESE randomized controlled trial. J Clin Anesth 2024; 92:111242. [PMID: 37833194 DOI: 10.1016/j.jclinane.2023.111242] [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: 06/08/2023] [Revised: 08/21/2023] [Accepted: 08/26/2023] [Indexed: 10/15/2023]
Abstract
STUDY OBJECTIVE We aimed to characterize intra-operative mechanical ventilation with low or high positive end-expiratory pressure (PEEP) and recruitment manoeuvres (RM) regarding intra-tidal recruitment/derecruitment and overdistension using non-linear respiratory mechanics, and mechanical power in obese surgical patients enrolled in the PROBESE trial. DESIGN Prospective, two-centre substudy of the international, multicentre, two-arm, randomized-controlled PROBESE trial. SETTING Operating rooms of two European University Hospitals. PATIENTS Forty-eight adult obese patients undergoing abdominal surgery. INTERVENTIONS Intra-operative protective ventilation with either PEEP of 12 cmH2O and repeated RM (HighPEEP+RM) or 4 cmH2O without RM (LowPEEP). MEASUREMENTS The index of intra-tidal recruitment/de-recruitment and overdistension (%E2) as well as airway pressure, tidal volume (VT), respiratory rate (RR), resistance, elastance, and mechanical power (MP) were calculated from respiratory signals recorded after anesthesia induction, 1 h thereafter, and end of surgery (EOS). MAIN RESULTS Twenty-four patients were analyzed in each group. PEEP was higher (mean ± SD, 11.7 ± 0.4 vs. 3.7 ± 0.6 cmH2O, P < 0.001) and driving pressure lower (12.8 ± 3.5 vs. 21.7 ± 6.8 cmH2O, P < 0.001) during HighPEEP+RM than LowPEEP, while VT and RR did not differ significantly (7.3 ± 0.6 vs. 7.4 ± 0.8 ml∙kg-1, P = 0.835; and 14.6 ± 2.5 vs. 15.7 ± 2.0 min-1, P = 0.150, respectively). %E2 was higher in HighPEEP+RM than in LowPEEP following induction (-3.1 ± 7.2 vs. -12.4 ± 10.2%; P < 0.001) and subsequent timepoints. Total resistance and elastance (13.3 ± 3.8 vs. 17.7 ± 6.8 cmH2O∙l∙s-2, P = 0.009; and 15.7 ± 5.5 vs. 28.5 ± 8.4 cmH2O∙l, P < 0.001, respectively) were lower during HighPEEP+RM than LowPEEP. Additionally, MP was lower in HighPEEP+RM than LowPEEP group (5.0 ± 2.2 vs. 10.4 ± 4.7 J∙min-1, P < 0.001). CONCLUSIONS In this sub-cohort of PROBESE, intra-operative ventilation with high PEEP and RM reduced intra-tidal recruitment/de-recruitment as well as driving pressure, elastance, resistance, and mechanical power, as compared with low PEEP. TRIAL REGISTRATION The PROBESE study was registered at www. CLINICALTRIALS gov, identifier: NCT02148692 (submission for registration on May 23, 2014).
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Affiliation(s)
- Martin Scharffenberg
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Maura Mandelli
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Largo Rosanna Benzi 8, 16131 Genoa, Italy
| | - Thomas Bluth
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Francesca Simonassi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Largo Rosanna Benzi 8, 16131 Genoa, Italy
| | - Jakob Wittenstein
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Robert Teichmann
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Katharina Birr
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Thomas Kiss
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany; Department of Anaesthesiology, Intensive-, Pain- and Palliative Care Medicine, Radebeul Hospital, Academic Hospital of the Technische Universität Dresden, Heinrich-Zille-Strasse 13, 01445 Radebeul, Germany
| | - Lorenzo Ball
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Largo Rosanna Benzi 8, 16131 Genoa, Italy; Anesthesia and Critical Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Largo Rosanna Benzi, 10, 16132 Genoa, Italy
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Largo Rosanna Benzi 8, 16131 Genoa, Italy; Anesthesia and Critical Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Largo Rosanna Benzi, 10, 16132 Genoa, Italy
| | - Marcus J Schultz
- Department of Intensive Care, Laboratory of Experimental Intensive Care & Anesthesiology (L E I C A), Amsterdam University Medical Centers, location AMC, Meibergdreef 9, 1105 AZ Amsterdam, Netherlands
| | - Marcelo Gama de Abreu
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany; Department of Intensive Care and Resuscitation, Anesthesiology Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, 44195, OH, USA; Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, 44195, OH, USA.
| | - Robert Huhle
- Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
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Braun M, Ruscher L, Fuchs A, Kämpfer M, Huber M, Luedi MM, Riva T, Vogt A, Riedel T. Atelectasis in obese patients undergoing laparoscopic bariatric surgery are not increased upon discharge from Post Anesthesia Care Unit. Front Med (Lausanne) 2023; 10:1233609. [PMID: 37727763 PMCID: PMC10505733 DOI: 10.3389/fmed.2023.1233609] [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: 06/05/2023] [Accepted: 07/31/2023] [Indexed: 09/21/2023] Open
Abstract
Background Obese patients frequently develop pulmonary atelectasis upon general anesthesia. The risk is increased during laparoscopic surgery. This prospective, observational single-center study evaluated atelectasis dynamics using Electric Impedance Tomography (EIT) in patients undergoing laparoscopic bariatric surgery. Methods We included adult patients with ASA physical status I-IV and a BMI of ≥40. Exclusion criteria were known severe pulmonary hypertension, home oxygen therapy, heart failure, and recent pulmonary infections. The primary outcome was the proportion of poorly ventilated lung regions (low tidal variation areas) and the global inhomogeneity (GI) index assessed by EIT before discharge from the Post Anesthesia Care Unit compared to these same measures prior to initiation of anesthesia. Results The median (IQR) proportion of low tidal variation areas at the different analysis points were T1 10.8% [3.6-15.1%] and T5 10.3% [2.6-18.9%], and the mean difference was -0.7% (95% CI: -5.8% -4.5%), i.e., lower than the predefined non-inferiority margin of 5% (p = 0.022). There were no changes at the four additional time points compared to T1 or postoperative pulmonary complications during the 14 days following the procedure. Conclusion We found that obese patients undergoing laparoscopic bariatric surgery do not leave the Post Anesthesia Care Unit with increased low tidal variation areas compared to the preoperative period.
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Affiliation(s)
- Matthias Braun
- Department of Anaesthesiology, Lindenhof Hospital, Bern, Switzerland
| | - Lea Ruscher
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Alexander Fuchs
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
- Unit for Research in Anaesthesia, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Martina Kämpfer
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Markus Huber
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Markus M. Luedi
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Thomas Riva
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Andreas Vogt
- Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Inselspital, University of Bern, Bern, Switzerland
| | - Thomas Riedel
- Division of Paediatric Intensive Care Medicine, Department of Paediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Mazzinari G, Zampieri FG, Ball L, Campos NS, Bluth T, Hemmes SN, Ferrando C, Librero J, Soro M, Pelosi P, Gama de Abreu M, Schultz MJ, Serpa Neto A. Effect of intraoperative PEEP with recruitment maneuvers on the occurrence of postoperative pulmonary complications during general anesthesia--protocol for Bayesian analysis of three randomized clinical trials of intraoperative ventilation. F1000Res 2023; 11:1090. [PMID: 37234075 PMCID: PMC10207960 DOI: 10.12688/f1000research.125861.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/21/2023] [Indexed: 10/22/2023] Open
Abstract
Background: Using the frequentist approach, a recent meta-analysis of three randomized clinical trials in patients undergoing intraoperative ventilation during general anesthesia for major surgery failed to show the benefit of ventilation that uses high positive end-expiratory pressure with recruitment maneuvers when compared to ventilation that uses low positive end-expiratory pressure without recruitment maneuvers. Methods: We designed a protocol for a Bayesian analysis using the pooled dataset. The multilevel Bayesian logistic model will use the individual patient data. Prior distributions will be prespecified to represent a varying level of skepticism for the effect estimate. The primary endpoint will be a composite of postoperative pulmonary complications (PPC) within the first seven postoperative days, which reflects the primary endpoint of the original studies. We preset a range of practical equivalence to assess the futility of the intervention with an interval of odds ratio (OR) between 0.9 and 1.1 and assess how much of the 95% of highest density interval (HDI) falls between the region of practical equivalence. Ethics and dissemination: The used data derive from approved studies that were published in recent years. The findings of this current analysis will be reported in a new manuscript, drafted by the writing committee on behalf of the three research groups. All investigators listed in the original trials will serve as collaborative authors.
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Affiliation(s)
- Guido Mazzinari
- Perioperative Medicine, Instituto de Investigación Sanitaria la Fe, Valencia, Spain, 46026, Spain
- Anesthesiology, Hospital Universitario y Politécnico la Fe, Valencia, Spain, 46026, Spain
| | | | - Lorenzo Ball
- Surgical sciences and integrated diagnostics, University of Genoa, Genoa, Italy
- IRCCS Policlinico San Martino, Genoa, Italy
| | - Niklas S. Campos
- Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
- Cardio pulmonary department, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidad de de Sao Paulo, Sao Paulo, Brazil
| | - Thomas Bluth
- Pulmonary Engineergin group, Anesthesiology and intensive Care, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Sabrine N.T. Hemmes
- Anesthesiology, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Intensive Care, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
| | - Carlos Ferrando
- Anesthesiology and Critical Care, Hospital Clinic de Barcelona, Institut D'investigació August Pi i Sunyer, Barcelona, Spain
- CIBER (Center of Biomedical Research in Respiratory Diseases, Instituto de Salud Carlos III, Madrid, Spain
| | - Julian Librero
- Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Pamplona, Spain
| | - Marina Soro
- INCLIVA Clinical Research Institute, Hospital Clinico Universitario de Valencia, Valencia, Spain
| | - Paolo Pelosi
- Surgical sciences and integrated diagnostics, University of Genoa, Genoa, Italy
- IRCCS Policlinico San Martino, Genoa, Italy
| | - Marcelo Gama de Abreu
- Pulmonary Engineergin group, Anesthesiology and intensive Care, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Marcus J. Schultz
- Intensive Care, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of tropical medicine, Mahidol University, Bangkok, Thailand
| | - Ary Serpa Neto
- Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
- Cardio pulmonary department, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidad de de Sao Paulo, Sao Paulo, Brazil
- Intensive Care, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia
- Critical Care, Melbourne Medical School, University of Melbourne, Austin Hospital, Melbourne, Australia
| | - PROVHILO investigators
- Perioperative Medicine, Instituto de Investigación Sanitaria la Fe, Valencia, Spain, 46026, Spain
- Anesthesiology, Hospital Universitario y Politécnico la Fe, Valencia, Spain, 46026, Spain
- Academic Research Organization, Albert Einstein Hospital, Sao Paulo, Brazil
- Surgical sciences and integrated diagnostics, University of Genoa, Genoa, Italy
- IRCCS Policlinico San Martino, Genoa, Italy
- Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
- Cardio pulmonary department, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidad de de Sao Paulo, Sao Paulo, Brazil
- Pulmonary Engineergin group, Anesthesiology and intensive Care, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Anesthesiology, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Intensive Care, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Anesthesiology and Critical Care, Hospital Clinic de Barcelona, Institut D'investigació August Pi i Sunyer, Barcelona, Spain
- CIBER (Center of Biomedical Research in Respiratory Diseases, Instituto de Salud Carlos III, Madrid, Spain
- Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Pamplona, Spain
- INCLIVA Clinical Research Institute, Hospital Clinico Universitario de Valencia, Valencia, Spain
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of tropical medicine, Mahidol University, Bangkok, Thailand
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia
- Critical Care, Melbourne Medical School, University of Melbourne, Austin Hospital, Melbourne, Australia
| | - iPROVE investigators
- Perioperative Medicine, Instituto de Investigación Sanitaria la Fe, Valencia, Spain, 46026, Spain
- Anesthesiology, Hospital Universitario y Politécnico la Fe, Valencia, Spain, 46026, Spain
- Academic Research Organization, Albert Einstein Hospital, Sao Paulo, Brazil
- Surgical sciences and integrated diagnostics, University of Genoa, Genoa, Italy
- IRCCS Policlinico San Martino, Genoa, Italy
- Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
- Cardio pulmonary department, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidad de de Sao Paulo, Sao Paulo, Brazil
- Pulmonary Engineergin group, Anesthesiology and intensive Care, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Anesthesiology, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Intensive Care, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Anesthesiology and Critical Care, Hospital Clinic de Barcelona, Institut D'investigació August Pi i Sunyer, Barcelona, Spain
- CIBER (Center of Biomedical Research in Respiratory Diseases, Instituto de Salud Carlos III, Madrid, Spain
- Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Pamplona, Spain
- INCLIVA Clinical Research Institute, Hospital Clinico Universitario de Valencia, Valencia, Spain
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of tropical medicine, Mahidol University, Bangkok, Thailand
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia
- Critical Care, Melbourne Medical School, University of Melbourne, Austin Hospital, Melbourne, Australia
| | - PROBESE investigators
- Perioperative Medicine, Instituto de Investigación Sanitaria la Fe, Valencia, Spain, 46026, Spain
- Anesthesiology, Hospital Universitario y Politécnico la Fe, Valencia, Spain, 46026, Spain
- Academic Research Organization, Albert Einstein Hospital, Sao Paulo, Brazil
- Surgical sciences and integrated diagnostics, University of Genoa, Genoa, Italy
- IRCCS Policlinico San Martino, Genoa, Italy
- Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
- Cardio pulmonary department, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidad de de Sao Paulo, Sao Paulo, Brazil
- Pulmonary Engineergin group, Anesthesiology and intensive Care, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Anesthesiology, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Intensive Care, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Anesthesiology and Critical Care, Hospital Clinic de Barcelona, Institut D'investigació August Pi i Sunyer, Barcelona, Spain
- CIBER (Center of Biomedical Research in Respiratory Diseases, Instituto de Salud Carlos III, Madrid, Spain
- Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Pamplona, Spain
- INCLIVA Clinical Research Institute, Hospital Clinico Universitario de Valencia, Valencia, Spain
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of tropical medicine, Mahidol University, Bangkok, Thailand
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia
- Critical Care, Melbourne Medical School, University of Melbourne, Austin Hospital, Melbourne, Australia
| | - PROVE network investigators
- Perioperative Medicine, Instituto de Investigación Sanitaria la Fe, Valencia, Spain, 46026, Spain
- Anesthesiology, Hospital Universitario y Politécnico la Fe, Valencia, Spain, 46026, Spain
- Academic Research Organization, Albert Einstein Hospital, Sao Paulo, Brazil
- Surgical sciences and integrated diagnostics, University of Genoa, Genoa, Italy
- IRCCS Policlinico San Martino, Genoa, Italy
- Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
- Cardio pulmonary department, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidad de de Sao Paulo, Sao Paulo, Brazil
- Pulmonary Engineergin group, Anesthesiology and intensive Care, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Anesthesiology, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Intensive Care, Amsterdam University Medical Centers, location ‘AMC’, Amsterdam, The Netherlands
- Anesthesiology and Critical Care, Hospital Clinic de Barcelona, Institut D'investigació August Pi i Sunyer, Barcelona, Spain
- CIBER (Center of Biomedical Research in Respiratory Diseases, Instituto de Salud Carlos III, Madrid, Spain
- Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Pamplona, Spain
- INCLIVA Clinical Research Institute, Hospital Clinico Universitario de Valencia, Valencia, Spain
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of tropical medicine, Mahidol University, Bangkok, Thailand
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia
- Critical Care, Melbourne Medical School, University of Melbourne, Austin Hospital, Melbourne, Australia
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Ou Y, Wang H, Yang L, Jiang W. Frailty is associated with an increased risk of postoperative pneumonia in elderly patients following surgical treatment for lower-extremity fractures: A cross-sectional study. Medicine (Baltimore) 2023; 102:e33557. [PMID: 37058022 PMCID: PMC10101317 DOI: 10.1097/md.0000000000033557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 03/28/2023] [Indexed: 04/15/2023] Open
Abstract
Elderly patients with lower-extremity fractures are at high risk of postoperative pneumonia (POP) after surgery due to longtime bed rest. This study aimed to explore whether preoperative frailty is an independent risk factor for POP in elderly patients undergoing surgical treatment for lower-extremity fractures. The study adopted a cross sectional design with 568 patients (≥60 years) admitted to a tertiary hospital in China from January 1, 2021 to June 30, 2022, for surgical intervention of a significant lower-extremity fracture. Preoperative frailty was assessed using the CFS (Clinical Frailty Scale). POP was assessed based on the classic diagnostic criteria reported in previous studies. Univariate and multiple logistic regression analyses were conducted to determine the impacts of preoperative frailty on POP. Of the 568 elderly patients, 65 (11.4%) developed pneumonia during postoperative hospitalization. There were significant differences among gender, hypoproteinemia, type of anesthesia, history of chronic obstructive pulmonary disease (COPD), and CFS scores. Multiple regression analysis revealed that the risk of POP in vulnerable, mildly frail, and severely frail patients increased by 2.38 times (P = .01, 95% CI [1.22-1.91]), 3.32 (P = .00, 95% CI [2.39-5.61]), and 5.36 (P = .00, 95% CI [3.95-6.52]), significantly. 12.8% of patients with hip fractures and 8.9% of patients with other main types of lower-extremity fractures developed POP. However, the difference between hip and non-hip fractures was not statistically significant (P > .05). Preoperative frailty increases the risk of POP in elderly patients after surgical treatment of main lower-extremity fractures. The severer the preoperative frailty is, the higher the risk of preoperative pneumonia is in elderly patients with lower-extremity fractures. CFS is simple and feasible for the assessment of frailty in elderly patients with lower-extremity fractures. Preoperative frailty assessment and appropriate management strategies should be considered in the perioperative management of elderly patients with lower-extremity fractures.
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Affiliation(s)
- Yili Ou
- Department of Orthopedics, Deyang People’s Hospital/Orthopedic Center of Deyang City, Deyang, China
| | - Hong Wang
- Department of Orthopedics, Deyang People’s Hospital/Orthopedic Center of Deyang City, Deyang, China
| | - Ling Yang
- Department of Orthopedics, Deyang People’s Hospital/Orthopedic Center of Deyang City, Deyang, China
| | - Wei Jiang
- Department of Orthopedics, Deyang People’s Hospital/Orthopedic Center of Deyang City, Deyang, China
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Ellenberger C, Pelosi P, de Abreu MG, Wrigge H, Diaper J, Hagerman A, Adam Y, Schultz MJ, Licker M. Distribution of ventilation and oxygenation in surgical obese patients ventilated with high versus low positive end-expiratory pressure: A substudy of a randomised controlled trial. Eur J Anaesthesiol 2022; 39:875-884. [PMID: 36093886 PMCID: PMC9553219 DOI: 10.1097/eja.0000000000001741] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
BACKGROUND Intra-operative ventilation using low/physiological tidal volume and positive end-expiratory pressure (PEEP) with periodic alveolar recruitment manoeuvres (ARMs) is recommended in obese surgery patients. OBJECTIVES To investigate the effects of PEEP levels and ARMs on ventilation distribution, oxygenation, haemodynamic parameters and cerebral oximetry. DESIGN A substudy of a randomised controlled trial. SETTING Tertiary medical centre in Geneva, Switzerland, between 2015 and 2018. PATIENTS One hundred and sixty-two patients with a BMI at least 35 kg per square metre undergoing elective open or laparoscopic surgery lasting at least 120 min. INTERVENTION Patients were randomised to PEEP of 4 cmH 2 O ( n = 79) or PEEP of 12 cmH 2 O with hourly ARMs ( n = 83). MAIN OUTCOME MEASURES The primary endpoint was the fraction of ventilation in the dependent lung as measured by electrical impedance tomography. Secondary endpoints were the oxygen saturation index (SaO 2 /FIO 2 ratio), respiratory and haemodynamic parameters, and cerebral tissue oximetry. RESULTS Compared with low PEEP, high PEEP was associated with smaller intra-operative decreases in dependent lung ventilation [-11.2%; 95% confidence interval (CI) -8.7 to -13.7 vs. -13.9%; 95% CI -11.7 to -16.5; P = 0.029], oxygen saturation index (-49.6%; 95% CI -48.0 to -51.3 vs. -51.3%; 95% CI -49.6 to -53.1; P < 0.001) and a lower driving pressure (-6.3 cmH 2 O; 95% CI -5.7 to -7.0). Haemodynamic parameters did not differ between the groups, except at the end of ARMs when arterial pressure and cardiac index decreased on average by -13.7 mmHg (95% CI -12.5 to -14.9) and by -0.54 l min -1 m -2 (95% CI -0.49 to -0.59) along with increased cerebral tissue oximetry (3.0 and 3.2% on left and right front brain, respectively). CONCLUSION In obese patients undergoing abdominal surgery, intra-operative PEEP of 12 cmH 2 O with periodic ARMs, compared with intra-operative PEEP of 4 cmH 2 O without ARMs, slightly redistributed ventilation to dependent lung zones with minor improvements in peripheral and cerebral oxygenation. TRIAL REGISTRATION NCT02148692, https://clinicaltrials.gov/ct2.
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Affiliation(s)
- Christoph Ellenberger
- From the Department of Anaesthesia, Pharmacology, Intensive Care and Emergency Medicine, University Hospital of Geneva, rue Gabriel-Perret-Gentil (CE, JD, AH, YA, ML), Faculty of Medicine, University of Geneva, Geneva, Switzerland (CE, ML), Department of Surgical Sciences and Integrated Diagnostics, University of Genoa (PP), Anaesthesia and Intensive Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy (PP), Pulmonary Engineering Group, Department of Anaesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Dresden, Germany (MGdA), Department of Outcomes Research (MGdA), Department of Intensive Care and Resuscitation, Anesthesiology Institute, Cleveland Clinic, Cleveland, Ohio, USA (MGdA), Department of Anaesthesiology, Intensive Care and Emergency Medicine, Pain Therapy, Bergmannstrost Hospital (HW), Medical Faculty, Martin-Luther-University Halle-Wittenberg, Halle, Germany (HW), Department of Intensive Care & Laboratory of Experimental Intensive Care and Anesthesiology, Amsterdam University Medical Centers, Amsterdam, The Netherlands (MJS)
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7
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Tidal Volume and Positive End-Expiratory Pressure and Postoperative Hypoxemia during General Anesthesia: A Single Center Multiple Cross-over Factorial Cluster Trial. Anesthesiology 2022; 137:406-417. [PMID: 35939350 DOI: 10.1097/aln.0000000000004342] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Intraoperative mechanical ventilation is a major component of general anesthesia. The extent to which various intraoperative tidal volumes and positive end-expiratory pressures (PEEP) on postoperative hypoxia and lung injury remains unclear. We hypothesized that adult patients having orthopedic surgery, ventilation using different tidal volumes and PEEP levels affects the oxygenation within first hour in the postoperative care unit. METHODS We conducted a 2 by 2 factorial cross-over cluster trial at the Cleveland Clinic Main Campus. We enrolled patients having orthopedic surgery with general anesthesia who were assigned to factorial clusters with tidal volumes of 6 or 10 ml/kg of predicted body weight and to PEEP of 5 or 8 cm H20 in one-week clusters The primary outcome was the effect of tidal volume or PEEP on time-weighted average peripheral oxygen saturation divided by the fraction of inspired oxygen (SpO2/FiO2 ratio) during the initial postoperative hour. RESULTS We enrolled 2860 patients who had general anesthesia for orthopedic surgery from September 2018 through October 2020. The interaction between tidal volume and PEEP was not significant (p = 0.565). The mean (SD) time-weighted average of SpO2/FiO2 ratio was 353 (47) and not different in patients assigned to high and low tidal volume (estimated effect 3.5% (97.5%CI: -0.4%,7.3%;P=0.042), and for those assigned to high and low PEEP (-0.2% (97.5%CI: -4.0%,3.6%;P=0.906). We did not find significant difference in ward SpO2/FiO2 ratio, pulmonary complications, and duration of hospitalization among patients assigned to various tidal volumes and PEEP levels. CONCLUSION Among adults having major orthopedic surgery, pulse oximetry oxygenation is similar with tidal volumes between 6 and 10 ml/kg and PEEP between 5 and 8 cm H20. Our results suggest that any combination of tidal volumes between 6 and 10 ml/kg and PEEP between 5 vs. 8 mL cmH20 can be used safely for orthopedic surgery.Trial Registration ClinicalTrials.gov Identifier: NCT03657368.
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Moon T, Thota B, Jan K, Oh M. Airway management in patients with obesity. Saudi J Anaesth 2022; 16:76-81. [PMID: 35261593 PMCID: PMC8846257 DOI: 10.4103/sja.sja_351_21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 05/31/2021] [Indexed: 12/01/2022] Open
Abstract
Airway management in patients with obesity remains a complex and evolving topic that is becoming more pertinent given the increasing prevalence of obesity and bariatric surgery worldwide. Obesity is associated with increased morbidity and mortality secondary to anesthetic complications, especially related to airway management. Preoperative assessment is especially vital for the bariatric patient so that potential predictors for a difficult airway can be identified. There are several airway management strategies and techniques for the bariatric population that may help reduce postoperative pulmonary complications. This review aims to discuss assessment of the airway, ideal patient positioning, intubation techniques and devices, apneic oxygenation, optimal ventilation strategies, and extubation and post-anesthesia care.
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Meng Y, Zhao P, Yong R. Modified Frailty Index Independently Predicts Postoperative Pulmonary Infection in Elderly Patients Undergoing Radical Gastrectomy for Gastric Cancer. Cancer Manag Res 2021; 13:9117-9126. [PMID: 34924772 PMCID: PMC8675092 DOI: 10.2147/cmar.s336023] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/17/2021] [Indexed: 12/26/2022] Open
Abstract
Background Pulmonary infection is one of the most common postoperative complications after radical gastrectomy for gastric cancer (GC) and is associated with a poorer prognosis. This study aimed to investigate potential predictive factors for pulmonary infection in elderly GC patients. Methods This study retrospectively enrolled 346 elderly GC patients undergoing elective radical gastrectomy between January 2017 and December 2020. Pulmonary infection within postoperative 30 days was set as the primary observational endpoint. The baseline demographic, clinicopathological, and laboratory data were compared between patients with or without pulmonary infection. ROC curves were plotted to evaluate the cut-off and predictive values of factors. Binary univariate and multivariate logistic regression analyses were employed to determine risk factors for postoperative pulmonary infection. Results Of the enrolled 346 patients, pulmonary infection was observed in 51 patients within postoperative 30 days, with an incidence of 14.7%. mFI was a significant predictor for pulmonary infection by ROC curve analysis (AUC: 0.770, P < 0.001). Moreover, preoperative mFI was the only independent risk factor for pulmonary infection (OR: 2.72, 95% CI: 2.02–3.31, P = 0.011) by univariate and multivariate logistic regression analyses. Conclusion Our study indicates that mFI independently predicts pulmonary infection in elderly GC patients.
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Affiliation(s)
- Yongsheng Meng
- Department of Anesthesiology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China
| | - Pengfei Zhao
- Department of Anesthesiology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China
| | - Rong Yong
- Department of Anesthesiology, Taizhou People's Hospital, Taizhou, Jiangsu, People's Republic of China
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Obesity and Positive End-expiratory Pressure: Reply. Anesthesiology 2021; 135:1160-1162. [PMID: 34610085 DOI: 10.1097/aln.0000000000004004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Effects of individualized PEEP obtained by two different titration methods on postoperative atelectasis in obese patients: study protocol for a randomized controlled trial. Trials 2021; 22:704. [PMID: 34654446 PMCID: PMC8517565 DOI: 10.1186/s13063-021-05671-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 09/30/2021] [Indexed: 11/25/2022] Open
Abstract
Background The incidence of postoperative pulmonary complications (PPCs) is higher in obese patients undergoing general anesthesia and mechanical ventilation due to the reduction of oxygen reserve, functional residual capacity, and lung compliance. Individualized positive end-expiratory pressure (iPEEP) along with other lung-protective strategies is effective in alleviating postoperative atelectasis. Here, we compared the best static lung compliance (Cstat) titration of iPEEP with electrical impedance tomography (EIT) titration to observe their effects on postoperative atelectasis in obese patients undergoing laparoscopic surgery. Methods A total number of 140 obese patients with BMI ≥ 32.5kg/m2 undergoing elective laparoscopic gastric volume reduction and at moderate to high risk of developing PPCs will be enrolled and randomized into the optimal static lung compliance-directed iPEEP group and EIT titration iPEEP group. The primary endpoint will be pulmonary atelectasis measured and calculated by EIT immediately after extubation and 2 h after surgery. Secondary endpoints will be intraoperative oxygenation index, organ dysfunction, incidence of PPCs, hospital expenses, and length of hospital stay. Discussion Many iPEEP titration methods effective for normal weight patients may not be appropriate for obese patients. Although EIT-guided iPEEP titration is effective in obese patients, its high price and complexity limit its application in many clinical facilities. This trial will test the efficacy of iPEEP via the optimal static lung compliance-guided titration procedure by comparing it with EIT-guided PEEP titration. The results of this trial will provide a feasible and convenient method for anesthesiologists to set individualized PEEP for obese patients during laparoscopic surgery. Trial registration ClinicalTrials.govChiCTR2000039144. Registered on October 19, 2020 Supplementary Information The online version contains supplementary material available at 10.1186/s13063-021-05671-1.
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Individualized versus Fixed Positive End-expiratory Pressure for Intraoperative Mechanical Ventilation in Obese Patients: A Secondary Analysis. Anesthesiology 2021; 134:887-900. [PMID: 33843980 DOI: 10.1097/aln.0000000000003762] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND General anesthesia may cause atelectasis and deterioration in oxygenation in obese patients. The authors hypothesized that individualized positive end-expiratory pressure (PEEP) improves intraoperative oxygenation and ventilation distribution compared to fixed PEEP. METHODS This secondary analysis included all obese patients recruited at University Hospital of Leipzig from the multicenter Protective Intraoperative Ventilation with Higher versus Lower Levels of Positive End-Expiratory Pressure in Obese Patients (PROBESE) trial (n = 42) and likewise all obese patients from a local single-center trial (n = 54). Inclusion criteria for both trials were elective laparoscopic abdominal surgery, body mass index greater than or equal to 35 kg/m2, and Assess Respiratory Risk in Surgical Patients in Catalonia (ARISCAT) score greater than or equal to 26. Patients were randomized to PEEP of 4 cm H2O (n = 19) or a recruitment maneuver followed by PEEP of 12 cm H2O (n = 21) in the PROBESE study. In the single-center study, they were randomized to PEEP of 5 cm H2O (n = 25) or a recruitment maneuver followed by individualized PEEP (n = 25) determined by electrical impedance tomography. Primary endpoint was Pao2/inspiratory oxygen fraction before extubation and secondary endpoints included intraoperative tidal volume distribution to dependent lung and driving pressure. RESULTS Ninety patients were evaluated in three groups after combining the two lower PEEP groups. Median individualized PEEP was 18 (interquartile range, 16 to 22; range, 10 to 26) cm H2O. Pao2/inspiratory oxygen fraction before extubation was 515 (individual PEEP), 370 (fixed PEEP of 12 cm H2O), and 305 (fixed PEEP of 4 to 5 cm H2O) mmHg (difference to individualized PEEP, 145; 95% CI, 91 to 200; P < 0.001 for fixed PEEP of 12 cm H2O and 210; 95% CI, 164 to 257; P < 0.001 for fixed PEEP of 4 to 5 cm H2O). Intraoperative tidal volume in the dependent lung areas was 43.9% (individualized PEEP), 25.9% (fixed PEEP of 12 cm H2O) and 26.8% (fixed PEEP of 4 to 5 cm H2O) (difference to individualized PEEP: 18.0%; 95% CI, 8.0 to 20.7; P < 0.001 for fixed PEEP of 12 cm H2O and 17.1%; 95% CI, 10.0 to 20.6; P < 0.001 for fixed PEEP of 4 to 5 cm H2O). Mean intraoperative driving pressure was 9.8 cm H2O (individualized PEEP), 14.4 cm H2O (fixed PEEP of 12 cm H2O), and 18.8 cm H2O (fixed PEEP of 4 to 5 cm H2O), P < 0.001. CONCLUSIONS This secondary analysis of obese patients undergoing laparoscopic surgery found better oxygenation, lower driving pressures, and redistribution of ventilation toward dependent lung areas measured by electrical impedance tomography using individualized PEEP. The impact on patient outcome remains unclear. EDITOR’S PERSPECTIVE
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Zhu C, Yao JW, An LX, Bai YF, Li WJ. Effects of intraoperative individualized PEEP on postoperative atelectasis in obese patients: study protocol for a prospective randomized controlled trial. Trials 2020; 21:618. [PMID: 32631414 PMCID: PMC7338115 DOI: 10.1186/s13063-020-04565-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 06/26/2020] [Indexed: 11/24/2022] Open
Abstract
Background Obese patients undergoing general anesthesia and mechanical ventilation during laparoscopic abdominal surgery commonly have a higher incidence of postoperative pulmonary complications (PPCs), due to factors such as decreasing oxygen reserve, declining functional residual capacity, and reducing lung compliance. Pulmonary atelectasis caused by pneumoperitoneum and mechanical ventilation is further aggravated in obese patients. Recent studies demonstrated that individualized positive end-expiratory pressure (iPEEP) was one of effective lung-protective ventilation strategies. However, there is still no exact method to determine the best iPEEP, especially for obese patients. Here, we will use the best static lung compliance (Cstat) method to determine iPEEP, compared with regular PEEP, by observing the atelectasis area measured by electrical impedance tomography (EIT), and try to prove a better iPEEP setting method for obese patients. Methods This study is a single-center, two-arm, prospective, randomized control trial. A total number of 80 obese patients with body mass index ≥ 32.5 kg/m2 scheduled for laparoscopic gastric volume reduction and at medium to high risk for PPCs will be enrolled. They will be randomly assigned to control group (PEEP5 group) and iPEEP group. A PEEP of 5 cmH2O will be used in PEEP5 group, whereas an individualized PEEP value determined by a Cstat-directed PEEP titration procedure will be applied in the iPEEP group. Standard lung-protective ventilation methods such as low tidal volumes (7 ml/kg, predicted body weight, PBW), a fraction of inspired oxygen ≥ 0.5, and recruitment maneuvers (RM) will be applied during and after operation in both groups. Primary endpoints will be postoperative atelectasis measured by chest electrical impedance tomography (EIT) and intraoperative oxygen index. Secondary endpoints will be serum IL-6, TNF-α, procalcitonin (PCT) kinetics during and after surgery, incidence of PPCs, organ dysfunction, length of in-hospital stay, and hospital expense. Discussion Although there are several studies about the effect of iPEEP titration on perioperative PPCs in obese patients recently, the iPEEP setting method they used was complex and was not always feasible in routine clinical practice. This trial will assess a possible simple method to determine individualized optimal PEEP in obese patients and try to demonstrate that individualized PEEP with lung-protective ventilation methods is necessary for obese patients undergoing general surgery. The results of this trial will support anesthesiologist a feasible Cstat-directed PEEP titration method during anesthesia for obese patients in attempt to prevent PPCs. Trial registration www.chictr.org.cn ChiCTR1900026466. Registered on 11 October 2019
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Affiliation(s)
- Chen Zhu
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yongan Road, Xicheng District, Beijing, 100050, China
| | - Jing-Wen Yao
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yongan Road, Xicheng District, Beijing, 100050, China
| | - Li-Xin An
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yongan Road, Xicheng District, Beijing, 100050, China.
| | - Ya-Fan Bai
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yongan Road, Xicheng District, Beijing, 100050, China
| | - Wen-Jing Li
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yongan Road, Xicheng District, Beijing, 100050, China
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Araujo OC, Espada EB, Costa FMA, Vigiato JA, Carmona MJC, Otoch JP, Silva JM, Martins MDA. [Impact of Grade I obesity on respiratory mechanics during video laparoscopic surgery: prospective longitudinal study]. Rev Bras Anestesiol 2020; 70:90-96. [PMID: 32171497 DOI: 10.1016/j.bjan.2019.12.001] [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: 03/06/2019] [Revised: 12/08/2019] [Accepted: 12/22/2019] [Indexed: 11/28/2022] Open
Abstract
INTRODUCTION AND OBJECTIVES The association pneumoperitoneum and obesity in video laparoscopy can contribute to pulmonary complications, but has not been well defined in specific groups of obese individuals. We assessed the effects of pneumoperitoneum in respiratory mechanics in Grade I obese compared to non-obese. METHODS Prospective study including 20 patients submitted to video laparoscopic cholecystectomy, normal spirometry, divided into non-obese (BMI ≤ 25kg.m-2) and obese (BMI > 30kg.mg-2), excluding Grade II and III obese. We measured pulmonary ventilation mechanics data before pneumoperitoneum (baseline), and five, fifteen and thirty minutes after peritoneal insufflation, and fifteen minutes after disinflation (final). RESULTS Mean BMI of non-obese was 22.72 ± 1.43kg.m-2 and of the obese 31.78 ± 1.09kg.m-2, p < 0.01. Duration of anesthesia and of peritoneal insufflation was similar between groups. Baseline pulmonary compliance (Crs) of the obese (38.3 ± 8.3mL.cm H2O-1) was lower than of the non-obese (47.4 ± 5.7mL.cm H2O-1), p = 0.01. After insufflation, Crs decreased in both groups and remained even lower in the obese at all moments assessed (GLM p < 0.01). Respiratory system peak pressure and plateau pressure were higher in the obese, albeit variations were similar at moments analyzed (GLM p > 0.05). The same occurred with elastic pressure, higher in the obese at all times (GLM p = 0.04), and resistive pressure showed differences in variations between groups during pneumoperitoneum (GLM p = 0,05). CONCLUSIONS Grade I obese presented more changes in pulmonary mechanics than the non-obese during video laparoscopies and the fact requires mechanical ventilation-related care.
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Affiliation(s)
- Orlandira Costa Araujo
- Universidade de São Paulo (USP), Hospital Universitário (HU), São Paulo, SP, Brasil; Instituto de Assistência Médica do Servidor Público Estadual do Estado de São Paulo (IAMSPE), São Paulo, SP, Brasil.
| | - Eloisa Bonetti Espada
- Universidade de São Paulo (USP), Hospital Universitário (HU), São Paulo, SP, Brasil; Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | | | | | - Maria José Carvalho Carmona
- Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | - José Pinhata Otoch
- Universidade de São Paulo (USP), Hospital Universitário (HU), São Paulo, SP, Brasil; Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | - João Manoel Silva
- Instituto de Assistência Médica do Servidor Público Estadual do Estado de São Paulo (IAMSPE), São Paulo, SP, Brasil; Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | - Milton de Arruda Martins
- Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
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Araujo OC, Espada EB, Costa FMA, Vigiato JA, Carmona MJC, Otoch JP, Silva JM, Martins MDA. Impact of Grade I obesity on respiratory mechanics during video laparoscopic surgery. BRAZILIAN JOURNAL OF ANESTHESIOLOGY (ENGLISH EDITION) 2020. [PMID: 32171497 PMCID: PMC9373104 DOI: 10.1016/j.bjane.2020.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Orlandira Costa Araujo
- Universidade de São Paulo (USP), Hospital Universitário (HU), São Paulo, SP, Brasil; Instituto de Assistência Médica do Servidor Público Estadual do Estado de São Paulo (IAMSPE), São Paulo, SP, Brasil.
| | - Eloisa Bonetti Espada
- Universidade de São Paulo (USP), Hospital Universitário (HU), São Paulo, SP, Brasil; Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | | | | | - Maria José Carvalho Carmona
- Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | - José Pinhata Otoch
- Universidade de São Paulo (USP), Hospital Universitário (HU), São Paulo, SP, Brasil; Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | - João Manoel Silva
- Instituto de Assistência Médica do Servidor Público Estadual do Estado de São Paulo (IAMSPE), São Paulo, SP, Brasil; Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
| | - Milton de Arruda Martins
- Universidade de São Paulo (USP), Faculdade de Medicina (FM), Hospital das Clínicas (HC), São Paulo, SP, Brasil
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Van Hecke D, Bidgoli JS, Van der Linden P. Does Lung Compliance Optimization Through PEEP Manipulations Reduce the Incidence of Postoperative Hypoxemia in Laparoscopic Bariatric Surgery? A Randomized Trial. Obes Surg 2020; 29:1268-1275. [PMID: 30612327 DOI: 10.1007/s11695-018-03662-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND In obese patients (OP), the best intraoperative ventilation strategy remains to be defined. Dynamic lung compliance (Cdyn) and dead space fraction are indicators of efficient ventilation at an optimal positive end-expiratory pressure (PEEP). Herein, we investigated whether intraoperative dynamic lung compliance optimization through PEEP manipulations affects the incidence of postoperative hypoxemia (SpO2 < 90%) in OP undergoing laparoscopic bariatric surgery (LBS). METHODS This was a single-center, prospective, randomized controlled study conducted from July 2013 to December 2015. After obtaining institutional review board approval and informed consent, 100 OP undergoing LBS under volume-controlled ventilation (tidal volume 8 mL/kg of ideal body weight) were randomized according to the PEEP level maintained during the surgery. In the control group, a PEEP of 10 cm H2O was maintained, while in the intervention group, the PEEP was adapted to achieve the best dynamic lung compliance. Anesthesia and analgesia were standardized. The patients received supplemental nasal oxygen on the first postoperative day and were monitored up to the second postoperative day with a portable pulse oximeter. RESULTS Demographics were similar between groups. There was no difference in the incidence of hypoxemia during the first 2 postoperative days (control: 1.3%; intervention: 2.1%; p = 0.264). CONCLUSIONS The incidence of postoperative hypoxemia was not reduced by an open-lung approach with protective ventilation strategy in obese patients undergoing LBS. A pragmatic application of a PEEP level of 10 cm H2O was comparable to individual PEEP titration in these patients. TRIAL REGISTRATION Clinicaltrials.gov identifier, NCT02579798; https://clinicaltrials.gov/ct2/show/NCT02579798.
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Affiliation(s)
- Delphine Van Hecke
- Department of Anaesthesiology, CUB Erasme, Université Libre de Bruxelles, 1070, Brussels, Belgium.
| | - Javad S Bidgoli
- Department of Anaesthesiology, CHU Brugmann-HUDERF, Université Libre de Bruxelles, 1090, Brussels, Belgium
| | - Philippe Van der Linden
- Department of Anaesthesiology, CHU Brugmann-HUDERF, Université Libre de Bruxelles, 1090, Brussels, Belgium
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Campos NS, Bluth T, Hemmes SNT, Librero J, Pozo N, Ferrando C, Ball L, Mazzinari G, Pelosi P, Gama de Abreu M, Schultz MJ, Neto AS. Re-evaluation of the effects of high PEEP with recruitment manoeuvres versus low PEEP without recruitment manoeuvres during general anaesthesia for surgery -Protocol and statistical analysis plan for an individual patient data meta-analysis of PROVHILO, iPROVE and PROBESE. ACTA ACUST UNITED AC 2020; 67:76-89. [PMID: 31955891 DOI: 10.1016/j.redar.2019.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/25/2019] [Accepted: 08/02/2019] [Indexed: 10/25/2022]
Affiliation(s)
- N S Campos
- Deptartment of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brasil; Cardio-Pulmonary Department, Pulmonary Division, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Pãulo, Brasil
| | - T Bluth
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - S N T Hemmes
- Department of Intensive Care & Laboratory of Experimental Intensive Care and Anesthesiology (LEICA), Amsterdam UMC, University of Amsterdam, Ámsterdam, Holanda; Department of Anaesthesiology, AnaesthesiologyDepartment Amsterdam UMC location 'AMC', University of Amsterdam, Ámsterdam, Países Bajos
| | - J Librero
- Navarrabiomed-Fundación Miguel Servet, Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Pamplona, Navarra, España
| | - N Pozo
- Department of Anesthesiology and Critical Care, Hospital Clínic de Barcelona, Barcelona, España
| | - C Ferrando
- Department of Anesthesiology and Critical Care, Hospital Clínic de Barcelona, Barcelona, España; CIBER of Respiratory Disease, Instituto de Salud Carlos III, Madrid, España
| | - L Ball
- IRCCS San Martino Policlinico Hospital, Genoa, Italia; Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italia
| | - G Mazzinari
- Department of Anesthesiology and Pain Medicine, Hospital de Manises, Valencia, España
| | - P Pelosi
- IRCCS San Martino Policlinico Hospital, Genoa, Italia; Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italia
| | - M Gama de Abreu
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - M J Schultz
- Department of Intensive Care & Laboratory of Experimental Intensive Care and Anesthesiology (LEICA), Amsterdam UMC, University of Amsterdam, Ámsterdam, Holanda; Research Group in Perioperative Medicine, Instituto de Investigación Sanitaria La Fe, Valencia, España; Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Tailandia
| | - A S Neto
- Deptartment of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brasil; Cardio-Pulmonary Department, Pulmonary Division, Instituto do Coração, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Pãulo, Brasil; Department of Intensive Care & Laboratory of Experimental Intensive Care and Anesthesiology (LEICA), Amsterdam UMC, University of Amsterdam, Ámsterdam, Holanda.
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Abstract
BACKGROUND Airway closure causes lack of communication between proximal airways and alveoli, making tidal inflation start only after a critical airway opening pressure is overcome. The authors conducted a matched cohort study to report the existence of this phenomenon among obese patients undergoing general anesthesia. METHODS Within the procedures of a clinical trial during gynecological surgery, obese patients underwent respiratory/lung mechanics and lung volume assessment both before and after pneumoperitoneum, in the supine and Trendelenburg positions, respectively. Among patients included in this study, those exhibiting airway closure were compared to a control group of subjects enrolled in the same trial and matched in 1:1 ratio according to body mass index. RESULTS Eleven of 50 patients (22%) showed airway closure after intubation, with a median (interquartile range) airway opening pressure of 9 cm H2O (6 to 12). With pneumoperitoneum, airway opening pressure increased up to 21 cm H2O (19 to 28) and end-expiratory lung volume remained unchanged (1,294 ml [1,154 to 1,363] vs. 1,160 ml [1,118 to 1,256], P = 0.155), because end-expiratory alveolar pressure increased consistently with airway opening pressure and counterbalanced pneumoperitoneum-induced increases in end-expiratory esophageal pressure (16 cm H2O [15 to 19] vs. 27 cm H2O [23 to 30], P = 0.005). Conversely, matched control subjects experienced a statistically significant greater reduction in end-expiratory lung volume due to pneumoperitoneum (1,113 ml [1,040 to 1,577] vs. 1,000 ml [821 to 1,061], P = 0.006). With airway closure, static/dynamic mechanics failed to measure actual lung/respiratory mechanics. When patients with airway closure underwent pressure-controlled ventilation, no tidal volume was inflated until inspiratory pressure overcame airway opening pressure. CONCLUSIONS In obese patients, complete airway closure is frequent during anesthesia and is worsened by Trendelenburg pneumoperitoneum, which increases airway opening pressure and alveolar pressure: besides preventing alveolar derecruitment, this yields misinterpretation of respiratory mechanics and generates a pressure threshold to inflate the lung that can reach high values, spreading concerns on the safety of pressure-controlled modes in this setting.
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Kim KM, Choi JJ, Lee D, Jung WS, Kim SB, Kwak HJ. Effects of ventilatory strategy on arterial oxygenation and respiratory mechanics in overweight and obese patients undergoing posterior spine surgery. Sci Rep 2019; 9:16638. [PMID: 31719658 PMCID: PMC6851094 DOI: 10.1038/s41598-019-53194-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 10/29/2019] [Indexed: 11/23/2022] Open
Abstract
Prolonged inspiratory to expiratory (I:E) ratio ventilation may improve arterial oxygenation or gas exchange and respiratory mechanics in patients with obesity. We performed a randomised study to compare the effects of the conventional ratio ventilation (CRV) of 1:2 and the equal ratio ventilation (ERV) of 1:1 on arterial oxygenation and respiratory mechanics during spine surgery in overweight and obese patients. Fifty adult patients with a body mass index of ≥25 kg/m2 were randomly allocated to receive an I:E ratio either l:2 (CRV; n = 25) or 1:1 (ERV; n = 25). Arterial oxygenation and respiratory mechanics were recorded in the supine position, and at 30 minutes and 90 minutes after placement in the prone position. The changes in partial arterial oxygen pressure (PaO2) over time did not differ between the groups. The changes in partial arterial carbon dioxide pressure over time were significantly different between the two groups (P = 0.040). The changes in mean airway pressure (Pmean) over time were significantly different between the two groups (P = 0.044). Although ERV provided a significantly higher Pmean than CRV during surgery, the changes in PaO2 did not differ between the two groups.
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Affiliation(s)
- Kyung Mi Kim
- Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jung Ju Choi
- Department of Anesthesiology and Pain Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
| | - Dongchul Lee
- Department of Anesthesiology and Pain Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
| | - Wol Seon Jung
- Department of Anesthesiology and Pain Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
| | - Su Bin Kim
- Department of Anesthesiology and Pain Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
| | - Hyun Jeong Kwak
- Department of Anesthesiology and Pain Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea.
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Bluth T, Serpa Neto A, Schultz MJ, Pelosi P, Gama de Abreu M, Bluth T, Bobek I, Canet JC, Cinnella G, de Baerdemaeker L, Gama de Abreu M, Gregoretti C, Hedenstierna G, Hemmes SNT, Hiesmayr M, Hollmann MW, Jaber S, Laffey J, Licker MJ, Markstaller K, Matot I, Mills GH, Mulier JP, Pelosi P, Putensen C, Rossaint R, Schmitt J, Schultz MJ, Senturk M, Serpa Neto A, Severgnini P, Sprung J, Vidal Melo MF, Wrigge H. Effect of Intraoperative High Positive End-Expiratory Pressure (PEEP) With Recruitment Maneuvers vs Low PEEP on Postoperative Pulmonary Complications in Obese Patients: A Randomized Clinical Trial. JAMA 2019; 321:2292-2305. [PMID: 31157366 PMCID: PMC6582260 DOI: 10.1001/jama.2019.7505] [Citation(s) in RCA: 191] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
IMPORTANCE An intraoperative higher level of positive end-expiratory positive pressure (PEEP) with alveolar recruitment maneuvers improves respiratory function in obese patients undergoing surgery, but the effect on clinical outcomes is uncertain. OBJECTIVE To determine whether a higher level of PEEP with alveolar recruitment maneuvers decreases postoperative pulmonary complications in obese patients undergoing surgery compared with a lower level of PEEP. DESIGN, SETTING, AND PARTICIPANTS Randomized clinical trial of 2013 adults with body mass indices of 35 or greater and substantial risk for postoperative pulmonary complications who were undergoing noncardiac, nonneurological surgery under general anesthesia. The trial was conducted at 77 sites in 23 countries from July 2014-February 2018; final follow-up: May 2018. INTERVENTIONS Patients were randomized to the high level of PEEP group (n = 989), consisting of a PEEP level of 12 cm H2O with alveolar recruitment maneuvers (a stepwise increase of tidal volume and eventually PEEP) or to the low level of PEEP group (n = 987), consisting of a PEEP level of 4 cm H2O. All patients received volume-controlled ventilation with a tidal volume of 7 mL/kg of predicted body weight. MAIN OUTCOMES AND MEASURES The primary outcome was a composite of pulmonary complications within the first 5 postoperative days, including respiratory failure, acute respiratory distress syndrome, bronchospasm, new pulmonary infiltrates, pulmonary infection, aspiration pneumonitis, pleural effusion, atelectasis, cardiopulmonary edema, and pneumothorax. Among the 9 prespecified secondary outcomes, 3 were intraoperative complications, including hypoxemia (oxygen desaturation with Spo2 ≤92% for >1 minute). RESULTS Among 2013 adults who were randomized, 1976 (98.2%) completed the trial (mean age, 48.8 years; 1381 [69.9%] women; 1778 [90.1%] underwent abdominal operations). In the intention-to-treat analysis, the primary outcome occurred in 211 of 989 patients (21.3%) in the high level of PEEP group compared with 233 of 987 patients (23.6%) in the low level of PEEP group (difference, -2.3% [95% CI, -5.9% to 1.4%]; risk ratio, 0.93 [95% CI, 0.83 to 1.04]; P = .23). Among the 9 prespecified secondary outcomes, 6 were not significantly different between the high and low level of PEEP groups, and 3 were significantly different, including fewer patients with hypoxemia (5.0% in the high level of PEEP group vs 13.6% in the low level of PEEP group; difference, -8.6% [95% CI, -11.1% to 6.1%]; P < .001). CONCLUSIONS AND RELEVANCE Among obese patients undergoing surgery under general anesthesia, an intraoperative mechanical ventilation strategy with a higher level of PEEP and alveolar recruitment maneuvers, compared with a strategy with a lower level of PEEP, did not reduce postoperative pulmonary complications. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT02148692.
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Affiliation(s)
| | - Thomas Bluth
- Department of Anesthesiology and Critical Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany
| | - Ary Serpa Neto
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Marcus J Schultz
- Department of Intensive Care, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Policlinico San Martino, Genoa, Italy
| | - Marcelo Gama de Abreu
- Department of Anesthesiology and Critical Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany
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21
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de Sousa GC, Cruz FF, Heil LB, Sobrinho CJS, Saddy F, Knibel FP, Pereira JB, Schultz MJ, Pelosi P, Gama de Abreu M, Silva PL, Rocco PRM. Intraoperative immunomodulatory effects of sevoflurane versus total intravenous anesthesia with propofol in bariatric surgery (the OBESITA trial): study protocol for a randomized controlled pilot trial. Trials 2019; 20:300. [PMID: 31138279 PMCID: PMC6540380 DOI: 10.1186/s13063-019-3399-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 05/06/2019] [Indexed: 02/06/2023] Open
Abstract
Background Obesity is associated with a chronic systemic inflammatory process. Volatile or intravenous anesthetic agents may modulate immune function, and may do so differentially in obesity. However, no study has evaluated whether these potential immunomodulatory effects differ according to type of anesthesia in obese patients undergoing laparoscopic bariatric surgery. Methods/design The OBESITA trial is a prospective, nonblinded, single-center, randomized, controlled clinical pilot trial. The trial will include 48 patients with a body mass index ≥ 35 kg/m2, scheduled for laparoscopic bariatric surgery using sleeve or a Roux-en-Y gastric bypass technique, who will be allocated 1:1 to undergo general inhalational anesthesia with sevoflurane or total intravenous anesthesia (TIVA) with propofol. The primary endpoint is the difference in plasma interleukin (IL)-6 levels when comparing the two anesthetic agents. Blood samples will be collected prior to anesthesia induction (baseline), immediately after anesthetic induction, and before endotracheal extubation. Levels of other proinflammatory and anti-inflammatory cytokines, neutrophil chemotaxis, macrophage differentiation, phagocytosis, and occurrence of intraoperative and postoperative complications will also be evaluated. Discussion To our knowledge, this is the first randomized clinical trial designed to compare the effects of two different anesthetics on immunomodulation in obese patients undergoing laparoscopic bariatric surgery. Our hypothesis is that anesthesia with sevoflurane will result in a weaker proinflammatory response compared to anesthesia with propofol, with lower circulating levels of IL-6 and other proinflammatory mediators, and increased macrophage differentiation into the M2 phenotype in adipose tissue. Trial registration Registro Brasileiro de Ensaios Clínicos, RBR-77kfj5. Registered on 25 July 2018. Electronic supplementary material The online version of this article (10.1186/s13063-019-3399-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Giselle Carvalho de Sousa
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Avenida Carlos Chagas Filho, 373, Bloco G1-014, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil.,Department of Anesthesiology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda Ferreira Cruz
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Avenida Carlos Chagas Filho, 373, Bloco G1-014, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Luciana Boavista Heil
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Avenida Carlos Chagas Filho, 373, Bloco G1-014, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil
| | | | - Felipe Saddy
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Avenida Carlos Chagas Filho, 373, Bloco G1-014, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil.,Institute D'Or of Research and Teaching, Rio de Janeiro, Brazil
| | | | | | - Marcus J Schultz
- Department of Intensive Care and Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.,Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy.,Ospedale Policlinico San Martino, IRCCS for Oncology and Neurosciences, Genoa, Italy
| | - Marcelo Gama de Abreu
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Dresden, Germany
| | - Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Avenida Carlos Chagas Filho, 373, Bloco G1-014, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil
| | - Patricia Rieken Macedo Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Avenida Carlos Chagas Filho, 373, Bloco G1-014, Ilha do Fundão, Rio de Janeiro, 21941-902, Brazil.
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Regli A, Pelosi P, Malbrain MLNG. Ventilation in patients with intra-abdominal hypertension: what every critical care physician needs to know. Ann Intensive Care 2019; 9:52. [PMID: 31025221 PMCID: PMC6484068 DOI: 10.1186/s13613-019-0522-y] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 04/04/2019] [Indexed: 12/16/2022] Open
Abstract
The incidence of intra-abdominal hypertension (IAH) is high and still underappreciated by critical care physicians throughout the world. One in four to one in three patients will have IAH on admission, while one out of two will develop IAH within the first week of Intensive Care Unit stay. IAH is associated with high morbidity and mortality. Although considerable progress has been made over the past decades, some important questions remain regarding the optimal ventilation management in patients with IAH. An important first step is to measure intra-abdominal pressure (IAP). If IAH (IAP > 12 mmHg) is present, medical therapies should be initiated to reduce IAP as small reductions in intra-abdominal volume can significantly reduce IAP and airway pressures. Protective lung ventilation with low tidal volumes in patients with respiratory failure and IAH is important. Abdominal-thoracic pressure transmission is around 50%. In patients with IAH, higher positive end-expiratory pressure (PEEP) levels are often required to avoid alveolar collapse but the optimal PEEP in these patients is still unknown. During recruitment manoeuvres, higher opening pressures may be required while closely monitoring oxygenation and the haemodynamic response. During lung-protective ventilation, whilst keeping driving pressures within safe limits, higher plateau pressures than normally considered might be acceptable. Monitoring of the respiratory function and adapting the ventilatory settings during anaesthesia and critical care are of great importance. This review will focus on how to deal with the respiratory derangements in critically ill patients with IAH.
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Affiliation(s)
- Adrian Regli
- Department of Intensive Care, Fiona Stanley Hospital, Murdoch Drive, Murdoch, WA 6152 Australia
- Medical School, Division of Emergency Medicine, The University of Western Australia, Sterling Highway, Crawley, Perth, WA 6009 Australia
- Medical School, The Notre Dame University, Henry Road, Fremantle, Perth, WA 6959 Australia
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
- San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
| | - Manu L. N. G. Malbrain
- Intensive Care Unit, University Hospital Brussels (UZB), Jette, Belgium
- Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
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Kiss T, Wittenstein J, Becker C, Birr K, Cinnella G, Cohen E, El Tahan MR, Falcão LF, Gregoretti C, Granell M, Hachenberg T, Hollmann MW, Jankovic R, Karzai W, Krassler J, Loop T, Licker MJ, Marczin N, Mills GH, Murrell MT, Neskovic V, Nisnevitch-Savarese Z, Pelosi P, Rossaint R, Schultz MJ, Serpa Neto A, Severgnini P, Szegedi L, Vegh T, Voyagis G, Zhong J, Gama de Abreu M, Senturk M. Protective ventilation with high versus low positive end-expiratory pressure during one-lung ventilation for thoracic surgery (PROTHOR): study protocol for a randomized controlled trial. Trials 2019; 20:213. [PMID: 30975217 PMCID: PMC6460685 DOI: 10.1186/s13063-019-3208-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 01/17/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Postoperative pulmonary complications (PPC) may result in longer duration of in-hospital stay and even mortality. Both thoracic surgery and intraoperative mechanical ventilation settings add considerably to the risk of PPC. It is unclear if one-lung ventilation (OLV) for thoracic surgery with a strategy of intraoperative high positive end-expiratory pressure (PEEP) and recruitment maneuvers (RM) reduces PPC, compared to low PEEP without RM. METHODS PROTHOR is an international, multicenter, randomized, controlled, assessor-blinded, two-arm trial initiated by investigators of the PROtective VEntilation NETwork. In total, 2378 patients will be randomly assigned to one of two different intraoperative mechanical ventilation strategies. Investigators screen patients aged 18 years or older, scheduled for open thoracic or video-assisted thoracoscopic surgery under general anesthesia requiring OLV, with a maximal body mass index of 35 kg/m2, and a planned duration of surgery of more than 60 min. Further, the expected duration of OLV shall be longer than two-lung ventilation, and lung separation is planned with a double lumen tube. Patients will be randomly assigned to PEEP of 10 cmH2O with lung RM, or PEEP of 5 cmH2O without RM. During two-lung ventilation tidal volume is set at 7 mL/kg predicted body weight and, during OLV, it will be decreased to 5 mL/kg. The occurrence of PPC will be recorded as a collapsed composite of single adverse pulmonary events and represents the primary endpoint. DISCUSSION PROTHOR is the first randomized controlled trial in patients undergoing thoracic surgery with OLV that is adequately powered to compare the effects of intraoperative high PEEP with RM versus low PEEP without RM on PPC. The results of the PROTHOR trial will support anesthesiologists in their decision to set intraoperative PEEP during protective ventilation for OLV in thoracic surgery. TRIAL REGISTRATION The trial was registered in clinicaltrials.gov ( NCT02963025 ) on 15 November 2016.
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Affiliation(s)
- T. Kiss
- Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - J. Wittenstein
- Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - C. Becker
- Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - K. Birr
- Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - G. Cinnella
- Department of Anesthesia and Intensive Care, OO Riuniti Hospital, University of Foggia, Foggia, Italy
| | - E. Cohen
- Department of Anesthesiology, The Mount Sinai Hospital, New York, USA
| | - M. R. El Tahan
- Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - L. F. Falcão
- Federal University of São Paulo, Sao Paulo, Brazil
| | - C. Gregoretti
- UOC Anestesia e Rianimazione A.O.Universitaria “P. Giaccone”, Dipartimento Di.Chir.On.S., Università degli Studi di Palermo, Palermo, Italy
| | - M. Granell
- Hospital General Universitario de Valencia, Valencia, Spain
| | | | - M. W. Hollmann
- Department of Anesthesiology, Amsterdam UMC, location AMC, Amsterdam, The Netherlands
| | - R. Jankovic
- Clinic for Anesthesia and Intensive Therapy, Clinical Center Nis, School of Medicine, University of Nis, Nis, Serbia
| | - W. Karzai
- Zentralklinik Bad Berka, Bad Berka, Germany
| | | | - T. Loop
- Department of Anesthesiology and Intensive Care Medicine Clinic, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | | | - N. Marczin
- Section of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London, UK
- Department of Anaesthesia, Royal Brompton and Harefield NHS Foundation Trust, Harefield Hospital, Harefield, Middlesex, UK
- Centre of Anaesthesia and Intensive Care, Semmelweis University, Budapest, Hungary
| | - G. H. Mills
- Department of Anaesthesia and Intensive Care Medicine, Sheffield Teaching Hospitals, Sheffield University, Sheffield, UK
| | - M. T. Murrell
- Department of Anesthesiology, Weill Cornell Medicine, New York, USA
| | | | | | - P. Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
- IRCCS San Martino Policlinico Hospital, Genoa, Italy
| | - R. Rossaint
- Department of Anaesthesiology, University Hospital Aachen, Aachen, Germany
| | - M. J. Schultz
- Department of Intensive Care & Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
- Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand
| | - A. Serpa Neto
- Department of Critical Care, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - P. Severgnini
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell’Insubria, Varese, Italy
| | - L. Szegedi
- Department of Anesthesiology, Centre Hospitalier Universitaire de Charleroi, Charleroi, Belgium
| | - T. Vegh
- Department of Anesthesiology and Intensive Care, University of Debrecen, Debrecen, Hungary
- Outcomes Research Consortium, Cleveland, USA
| | - G. Voyagis
- Department of Anaesthesia, Postoperative ICU, Pain Relief & Palliative Care Clinic, “Sotiria” Chest Diseases Hospital, Athens, Greece
- Department of Anaesthesiology and Critical Care Medicine, University of Patras, Patra, Greece
| | - J. Zhong
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - M. Gama de Abreu
- Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - M. Senturk
- Department of Anaesthesiology and Intensive Care, Istanbul University, Istanbul Medical Faculty, Istanbul, Turkey
| | - the Research Workgroup PROtective VEntilation Network (PROVEnet) of the European Society of Anaesthesiology (ESA)
- Department of Anesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Department of Anesthesia and Intensive Care, OO Riuniti Hospital, University of Foggia, Foggia, Italy
- Department of Anesthesiology, The Mount Sinai Hospital, New York, USA
- Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Federal University of São Paulo, Sao Paulo, Brazil
- UOC Anestesia e Rianimazione A.O.Universitaria “P. Giaccone”, Dipartimento Di.Chir.On.S., Università degli Studi di Palermo, Palermo, Italy
- Hospital General Universitario de Valencia, Valencia, Spain
- University Hospital Magdeburg, Magdeburg, Germany
- Department of Anesthesiology, Amsterdam UMC, location AMC, Amsterdam, The Netherlands
- Clinic for Anesthesia and Intensive Therapy, Clinical Center Nis, School of Medicine, University of Nis, Nis, Serbia
- Zentralklinik Bad Berka, Bad Berka, Germany
- Thoracic Center Coswig, Coswig, Germany
- Department of Anesthesiology and Intensive Care Medicine Clinic, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- University Hospital Geneva, Geneva, Switzerland
- Section of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London, UK
- Department of Anaesthesia, Royal Brompton and Harefield NHS Foundation Trust, Harefield Hospital, Harefield, Middlesex, UK
- Centre of Anaesthesia and Intensive Care, Semmelweis University, Budapest, Hungary
- Department of Anaesthesia and Intensive Care Medicine, Sheffield Teaching Hospitals, Sheffield University, Sheffield, UK
- Department of Anesthesiology, Weill Cornell Medicine, New York, USA
- Military Medical Academy, Belgrade, Serbia
- Penn State Hershey Anesthesiology & Perioperative Medicine, Hershey, USA
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
- IRCCS San Martino Policlinico Hospital, Genoa, Italy
- Department of Anaesthesiology, University Hospital Aachen, Aachen, Germany
- Department of Intensive Care & Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
- Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand
- Department of Critical Care, Hospital Israelita Albert Einstein, São Paulo, Brazil
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell’Insubria, Varese, Italy
- Department of Anesthesiology, Centre Hospitalier Universitaire de Charleroi, Charleroi, Belgium
- Department of Anesthesiology and Intensive Care, University of Debrecen, Debrecen, Hungary
- Outcomes Research Consortium, Cleveland, USA
- Department of Anaesthesia, Postoperative ICU, Pain Relief & Palliative Care Clinic, “Sotiria” Chest Diseases Hospital, Athens, Greece
- Department of Anaesthesiology and Critical Care Medicine, University of Patras, Patra, Greece
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
- Department of Anaesthesiology and Intensive Care, Istanbul University, Istanbul Medical Faculty, Istanbul, Turkey
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Bonatti G, Robba C, Ball L, Silva PL, Rocco PRM, Pelosi P. Controversies when using mechanical ventilation in obese patients with and without acute distress respiratory syndrome. Expert Rev Respir Med 2019; 13:471-479. [PMID: 30919705 DOI: 10.1080/17476348.2019.1599285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION As the prevalence of obesity increases, so does the number of obese patients undergoing surgical procedures and being admitted into intensive care units. Obesity per se is associated with reduced lung volume. The combination of general anaesthesia and supine positioning involved in most surgeries causes further reductions in lung volumes, thus resulting in alveolar collapse, decreased lung compliance, increased airway resistance, and hypoxemia. These complications can be amplified by common obesity-related comorbidities. In otherwise healthy obese patients, mechanical ventilation strategies should be optimised to prevent lung damage; in those with acute distress respiratory syndrome (ARDS), strategies should seek to mitigate further lung damage. Areas covered: This review discusses non-invasive and invasive mechanical ventilation strategies for surgical and critically ill adult obese patients with and without ARDS and proposes practical clinical insights to be implemented at bedside both in the operating theatre and in intensive care units. Expert opinion: Large multicentre trials on respiratory management of obese patients are required. Although the indication of lung protective ventilation with low tidal volume is apparently translated to obese patients, optimal PEEP level and recruitment manoeuvres remain controversial. The use of non-invasive respiratory support after extubation must be considered in individual cases.
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Affiliation(s)
- Giulia Bonatti
- a Department of Surgical Sciences and Integrated Diagnostics , University of Genoa , Genoa , Italy
| | - Chiara Robba
- b Department of Anaesthesiology and Intensive Care , San Martino Policlinico Hospital , Genoa , Italy
| | - Lorenzo Ball
- a Department of Surgical Sciences and Integrated Diagnostics , University of Genoa , Genoa , Italy
| | - Pedro Leme Silva
- c Laboratory of Pulmonary Investigation - Carlos Chagas Filho Institute of Biophysics , Federal University of Rio de Janeiro , Rio de Janeiro , Brazil.,d National Institute of Science and Technology for Regenerative Medicine , Rio de Janeiro , Brazil
| | - Patricia Rieken Macêdo Rocco
- c Laboratory of Pulmonary Investigation - Carlos Chagas Filho Institute of Biophysics , Federal University of Rio de Janeiro , Rio de Janeiro , Brazil.,d National Institute of Science and Technology for Regenerative Medicine , Rio de Janeiro , Brazil
| | - Paolo Pelosi
- a Department of Surgical Sciences and Integrated Diagnostics , University of Genoa , Genoa , Italy.,b Department of Anaesthesiology and Intensive Care , San Martino Policlinico Hospital , Genoa , Italy
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Boavista Barros Heil L, Rieken Macedo Rocco P, Leme Silva P, Pelosi P. Mechanical Ventilation in the Critically Ill Obese Patient. Anesth Analg 2018. [DOI: 10.1213/ane.0000000000003811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bignami E, Spadaro S, Saglietti F, Di Lullo A, Corte FD, Guarnieri M, de Simone G, Giambuzzi I, Zangrillo A, Volta CA. Positive end-expiratory pressure (PEEP) level to prevent expiratory flow limitation during cardiac surgery: study protocol for a randomized clinical trial (EFLcore study). Trials 2018; 19:654. [PMID: 30477541 PMCID: PMC6258414 DOI: 10.1186/s13063-018-3046-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Accepted: 11/11/2018] [Indexed: 11/11/2022] Open
Abstract
Background Lung dysfunction commonly occurs after cardiopulmonary bypass (CPB). Randomized evidence suggests that the presence of expiratory flow limitation (EFL) in major abdominal surgery is associated with postoperative pulmonary complications. Appropriate lung recruitment and a correctly set positive end-expiratory pressure (PEEP) level may prevent EFL. According to the available data in the literature, an adequate ventilation strategy during cardiac surgery is not provided. The aim of this study is to assess whether a mechanical ventilation strategy based on optimal lung recruitment with a best PEEP before and after CPB and with a continuous positive airway pressure (CPAP) during CPB would reduce the incidence of respiratory complications after cardiac surgery. Methods/design This will be a single-center, single-blind, parallel-group, randomized controlled trial. Using a 2-by-2 factorial design, high-risk adult patients undergoing elective cardiac surgery will be randomly assigned to receive either a best PEEP (calculated with a PEEP test) or zero PEEP before and after CPB and CPAP (equal to the best PEEP) or no ventilation (patient disconnected from the circuit) during CPB. The primary endpoint will be a composite endpoint of the incidence of EFL after the weaning from CPB and postoperative pulmonary complications. Discussion This study will help to establish a correct ventilatory strategy before, after, and during CPB. The main purpose is to establish if a ventilation based on a simple and feasible respiratory test may preserve lung function in cardiac surgery. Trial registration ClinicalTrials.gov, ID: NCT02633423. Registered on 6 December 2017. Electronic supplementary material The online version of this article (10.1186/s13063-018-3046-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Elena Bignami
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy. .,Anesthesiology, Critical Care and Pain Medicine Division, Department of Medicine and Surgery, University of Parma, Viale Gramsci 14, 43126, Parma, Italy.
| | - Savino Spadaro
- Department of Morphology, Surgery and Experimental Medicine, Section of Anesthesia and Intensive Care, University of Ferrara, Via Aldo Moro 8, 44121, Ferrara, Italy
| | - Francesco Saglietti
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Antonio Di Lullo
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Francesca Dalla Corte
- Department of Morphology, Surgery and Experimental Medicine, Section of Anesthesia and Intensive Care, University of Ferrara, Via Aldo Moro 8, 44121, Ferrara, Italy
| | - Marcello Guarnieri
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Giulio de Simone
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Ilaria Giambuzzi
- Department of Cardiac Surgery, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Alberto Zangrillo
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Carlo Alberto Volta
- Department of Morphology, Surgery and Experimental Medicine, Section of Anesthesia and Intensive Care, University of Ferrara, Via Aldo Moro 8, 44121, Ferrara, Italy
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Lagier D, Fischer F, Fornier W, Fellahi JL, Colson P, Cholley B, Jaber S, Baumstarck K, Guidon C. A perioperative surgeon-controlled open-lung approach versus conventional protective ventilation with low positive end-expiratory pressure in cardiac surgery with cardiopulmonary bypass (PROVECS): study protocol for a randomized controlled trial. Trials 2018; 19:624. [PMID: 30424770 PMCID: PMC6234562 DOI: 10.1186/s13063-018-2967-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 10/08/2018] [Indexed: 12/16/2022] Open
Abstract
Background Postoperative pulmonary complications (PPCs) are frequent after on-pump cardiac surgery. Cardiac surgery results in a complex pulmonary insult leading to high susceptibility to perioperative pulmonary atelectasis. For technical reasons, ventilator settings interact with the surgical procedure and traditionally, low levels of positive end-expiratory pressure (PEEP) have been used. The objective is to compare a perioperative, multimodal and surgeon-controlled open-lung approach with conventional protective ventilation with low PEEP to prevent PPCs in patients undergoing cardiac surgery. Methods/design The perioperative open-lung protective ventilation in cardiac surgery (PROVECS) trial is a multicenter, two-arm, randomized controlled trial. In total, 494 patients scheduled for elective cardiac surgery with cardiopulmonary bypass (CPB) and aortic cross-clamp will be randomized into one of the two treatment arms. In the experimental group, systematic recruitment maneuvers and perioperative high PEEP (8 cmH2O) are associated with ultra-protective ventilation during CPB. In this group, the settings of the ventilator are controlled by surgeons in relation to standardized protocol deviations. In the control group, no recruitment maneuvers, low levels of PEEP (2 cmH2O) and continuous positive airway pressure during CPB (2 cmH2O) are used. Low tidal volumes (6–8 mL/kg of predicted body weight) are used before and after CPB in each group. The primary endpoint is a composite of the single PPCs evaluated during the first 7 postoperative days. Discussion The PROVECS trial will be the first multicenter randomized controlled trial to evaluate the impact of a perioperative and multimodal open-lung ventilatory strategy on the occurrence of PPCs after on-pump cardiac surgery. The trial design includes standardized surgeon-controlled protocol deviations that guarantee a pragmatic approach. The results will help anesthesiologists and surgeons aiming to optimize ventilatory settings during cardiac surgery. Trial registration Clinical Trials.gov, NCT 02866578. Registered on 15 August 2016. Last updated 11 July 2017. Electronic supplementary material The online version of this article (10.1186/s13063-018-2967-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- David Lagier
- Department of Cardiovascular Anesthesiology and Critical Care Medicine, La Timone University Hospital, AP-HM and Aix-Marseille University, 264 rue saint Pierre, 13005, cedex 5, Marseille, France.
| | - François Fischer
- Department of Cardiovascular and Thoracic Anesthesiology, Nouvel Hôpital Civil, Strasbourg, France
| | - William Fornier
- Department of Anesthesiology and Critical Care Medicine, Louis Pradel University Hospital and University Claude Bernard, 28 Avenue du Doyen Lépine, 69677, Bron, France
| | - Jean-Luc Fellahi
- Department of Anesthesiology and Critical Care Medicine, Louis Pradel University Hospital and University Claude Bernard, 28 Avenue du Doyen Lépine, 69677, Bron, France
| | - Pascal Colson
- Department of Anesthesiology and Critical Care Medicine, Arnaud de Villeneuve University Hospital, 371 Avenue du Doyen Gaston Giraud, 34295, Montpellier, France
| | - Bernard Cholley
- Department of Anesthesiology and Critical Care Medicine, Hôpital Européen Georges Pompidou, AP-HP and University Paris Descartes-Sorbonne Paris Cité, 20 Rue Leblanc, 75015, Paris, France
| | - Samir Jaber
- Department of Anesthesiology and Critical Care Medicine, Saint Eloi University Hospital, 80 Avenue Augustin Fliche, 34295, Montpellier, France
| | - Karine Baumstarck
- Unité de Recherche EA3279, Aix-Marseille University, 27 bd Jean Moulin, Marseille, cedex 5, 13385, Marseille, France
| | - Catherine Guidon
- Department of Cardiovascular Anesthesiology and Critical Care Medicine, La Timone University Hospital, AP-HM and Aix-Marseille University, 264 rue saint Pierre, 13005, cedex 5, Marseille, France
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Pelosi P, Ball L. Should we titrate ventilation based on driving pressure? Maybe not in the way we would expect. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:389. [PMID: 30460263 DOI: 10.21037/atm.2018.09.48] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mechanical ventilation maintains adequate gas exchange in patients during general anaesthesia, as well as in critically ill patients without and with acute respiratory distress syndrome (ARDS). Optimization of mechanical ventilation is important to minimize ventilator induced lung injury and improve outcome. Tidal volume (VT), positive end-expiratory pressure (PEEP), respiratory rate (RR), plateau pressures as well as inspiratory oxygen are the main parameters to set mechanical ventilation. Recently, the driving pressure (∆P), i.e., the difference of the plateau pressure and end-expiratory pressure of the respiratory system or of the lung, has been proposed as a key role parameter to optimize mechanical ventilation parameters. The ∆P depends on the VT as well as on the relative balance between the amount of aerated and/or overinflated lung at end-expiration and end-inspiration at different levels of PEEP. During surgery, higher ∆P, mainly due to VT, was progressively associated with an increased risk to develop post-operative pulmonary complications; in two large randomized controlled trials the reduction in ∆P by PEEP did not result in better outcome. In non-ARDS patients, ∆P was not found even associated with morbidity and mortality. In ARDS patients, an association between ∆P (higher than 13-15 cmH2O) and mortality has been reported. In several randomized controlled trials, when ∆P was minimized by the use of higher PEEP with or without recruitment manoeuvres, this strategy resulted in equal or even higher mortality. No clear data are currently available about the interpretation and clinical use of ∆P during assisted ventilation. In conclusion, ∆P is an indicator of severity of the lung disease, is related to VT size and associated with complications and mortality. We advocate the use of ∆P to optimize individually VT but not PEEP in mechanically ventilated patients with and without ARDS.
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Affiliation(s)
- Paolo Pelosi
- Dipartimento di Scienze Chirurgiche e Diagnostiche Integrate, Università degli Studi di Genova, Genova, Italy.,Policlinico San Martino, IRCCS per l'Oncologia, Genova, Italy
| | - Lorenzo Ball
- Dipartimento di Scienze Chirurgiche e Diagnostiche Integrate, Università degli Studi di Genova, Genova, Italy.,Policlinico San Martino, IRCCS per l'Oncologia, Genova, Italy
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Intraoperative ventilation settings and their associations with postoperative pulmonary complications in obese patients. Br J Anaesth 2018; 121:899-908. [DOI: 10.1016/j.bja.2018.04.021] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 03/05/2018] [Accepted: 04/18/2018] [Indexed: 11/22/2022] Open
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Fulton R, Millar JE, Merza M, Johnston H, Corley A, Faulke D, Rapchuk I, Tarpey J, Lockie P, Lockie S, Fraser JF. High flow nasal oxygen after bariatric surgery (OXYBAR), prophylactic post-operative high flow nasal oxygen versus conventional oxygen therapy in obese patients undergoing bariatric surgery: study protocol for a randomised controlled pilot trial. Trials 2018; 19:402. [PMID: 30053897 PMCID: PMC6062994 DOI: 10.1186/s13063-018-2777-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 06/29/2018] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND The incidence of obesity is increasing worldwide. In selected individuals, bariatric surgery may offer a means of achieving long-term weight loss, improved health, and healthcare cost reduction. Physiological changes that occur because of obesity and general anaesthesia predispose to respiratory complications following bariatric surgery. The aim of this study is to determine whether post-operative high flow nasal oxygen therapy (HFNO2) improves respiratory function and reduces the incidence of post-operative pulmonary complications (PPCs) in comparison to conventional oxygen therapy in these patients. METHOD The OXYBAR study is a prospective, un-blinded, single centre, randomised, controlled pilot study. Patients with body mass index (BMI) > 30 kg/m2, undergoing laparoscopic bariatric surgery, will be randomised to receive either standard low flow oxygen therapy or HFNO2 in the post-operative period. The primary outcome measure is the change in end expiratory lung impedance (∆EELI) as measured by electrical impedance tomography (EIT). Secondary outcome measures include change in tidal volume (∆Vt), partial arterial pressure of oxygen/fraction of inspired oxygen (PaO2/FiO2) ratio, incidence of PPCs, hospital length of stay and measures of patient comfort. DISCUSSION We hypothesise that the post-operative administration of HFNO2 will increase EELI and therefore end expiratory lung volume (EELV) in obese patients. To our knowledge this is the first trial designed to assess the effects of HFNO2 on EELV in this population. We anticipate that data collected during this pilot study will inform a larger multicentre trial. TRIAL REGISTRATION Australian New Zealand Clinical Trials Registry (ANZCTR), ACTRN12617000694314 . Registered on 15 May 2017.
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Affiliation(s)
- Rachel Fulton
- Critical Care Research Group, The Prince Charles Hospital, Rode Road, Brisbane, QLD 4032 Australia
| | - Jonathan E. Millar
- Critical Care Research Group, The Prince Charles Hospital, Rode Road, Brisbane, QLD 4032 Australia
- Faculty of Medicine, University of Queensland, Brisbane, Australia
- Wellcome-Wolfson Centre for Experimental Medicine, Queen’s University Belfast, Belfast, Northern Ireland UK
| | - Megan Merza
- Critical Care Research Group, The Prince Charles Hospital, Rode Road, Brisbane, QLD 4032 Australia
- St Andrews War Memorial Hospital, Brisbane, Australia
| | | | - Amanda Corley
- Critical Care Research Group, The Prince Charles Hospital, Rode Road, Brisbane, QLD 4032 Australia
- Griffith University, Griffith, Queensland Australia
| | - Daniel Faulke
- St Andrews War Memorial Hospital, Brisbane, Australia
| | - Ivan Rapchuk
- St Andrews War Memorial Hospital, Brisbane, Australia
| | - Joe Tarpey
- St Andrews War Memorial Hospital, Brisbane, Australia
| | - Philip Lockie
- St Andrews War Memorial Hospital, Brisbane, Australia
| | | | - John F. Fraser
- Critical Care Research Group, The Prince Charles Hospital, Rode Road, Brisbane, QLD 4032 Australia
- Faculty of Medicine, University of Queensland, Brisbane, Australia
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Brovman EY, Foley CA, Shen AH, Whang EE, Urman RD. Intraoperative Ventilation Patterns in Morbidly Obese Patients Undergoing Laparoscopic Bariatric Surgery. J Laparoendosc Adv Surg Tech A 2018; 28:1463-1470. [PMID: 29870299 DOI: 10.1089/lap.2018.0297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background: The purpose of this study was to examine ventilation patterns, including tidal volume (TV) and positive end-expiratory pressure (PEEP) selection in morbidly obese patients undergoing laparoscopic Roux-en-Y gastric bypass or laparoscopic sleeve gastrectomy. Methods: Intraoperative ventilation data, including TV and PEEP, were abstracted from the electronic anesthesia record (Metavision) at Brigham and Women's Hospital. Ideal body weight (IBW) was calculated using the Devine formula, and TV per kg IBW was calculated for each patient. Results: The mean TV delivered per kg IBW was 7.35 ± 1.07 mL/kg, and 24% (281/1186) of patients received TVs of >8 mL/kg IBW. The median PEEP applied was 5.5 ± 0.6 cmH2O, and 87% (1035/1186) of patients received PEEP >0 cmH2O. There was significant variation in both TV and PEEP selection. Conclusions: The significant variation in TV per kg IBW as well as in PEEP values at our institution may reflect the lack of well-established guidelines for intraoperative ventilation. Many patients in this study received inappropriately large TVs (>8 mL/kg IBW), which may be due to calculation of TVs based on total body weight rather than IBW. Patients of shorter stature and higher body mass index appear to be at higher risk for ventilation with inappropriately large TVs.
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Affiliation(s)
- Ethan Y Brovman
- 1 Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | | | - Abra H Shen
- 3 Harvard Medical School, Boston, Massachusetts
| | - Edward E Whang
- 3 Harvard Medical School, Boston, Massachusetts.,4 Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts.,5 Center for Perioperative Research, Brigham and Women's Hospital, Boston, Massachusetts
| | - Richard D Urman
- 1 Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts.,3 Harvard Medical School, Boston, Massachusetts.,5 Center for Perioperative Research, Brigham and Women's Hospital, Boston, Massachusetts
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Blecha S, Harth M, Zeman F, Seyfried T, Lubnow M, Burger M, Denzinger S, Pawlik MT. The impact of obesity on pulmonary deterioration in patients undergoing robotic-assisted laparoscopic prostatectomy. J Clin Monit Comput 2018; 33:133-143. [PMID: 29663179 DOI: 10.1007/s10877-018-0142-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 04/12/2018] [Indexed: 12/23/2022]
Abstract
Obesity affects respiratory and hemodynamic function in anesthetized patients. The aim of this study was to evaluate the influence of the body mass index (BMI) on pulmonary changes in a permanent 45° steep Trendelenburg position (STP) during robotic-assisted laparoscopic prostatectomy (RALP). 51 patients undergoing RALP under standardized anesthesia were included. Perioperative pulmonary function and oxygenation were measured in awake patients (T0), 20 min after the induction of anesthesia (T1), after insufflation of the abdomen in supine position (T2), after 30 min in STP (T3), when controlling Santorini's plexus in STP (T4), before awakening while supine (T5), and after 45 min in the recovery room (T6). Patient-specific and time-dependent factor on ventilation and predicted peak inspiratory pressure (PIP), driving pressure (Pdriv) and lung compliance (LC) in a linear regression model were calculated. PIP and Pdriv increased significantly after induction of capnoperitoneum (T2-4) (p < 0.0001). In univariate mixed effects models, BMI was found to be a significant predictor for PIP and Pdriv increase and LC decrease. Obese patients a BMI > 31 kg/m2 reached critical PIP values ≥ 35 cmH2O. Postoperative oxygenation represented by the PaO2/FiO2 ratio was significantly decreased compared to T0 (p < 0.0001). Obesity in combination with STP and capnoperitoneum during RALP has a profound effect on pulmonary function. Increased PIP and Pdriv and decreased LC are directly correlated with a high BMI. Changes in PIP, Pdriv and LC during RALP may be predicted in relation to patient's BMI for consideration in the preoperative setting. Trial registration number Z-2014-0387-6. Registered on 8 July 2014.
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Affiliation(s)
- Sebastian Blecha
- Department of Anesthesiology, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
| | - Marion Harth
- Department of Anesthesiology, Caritas St. Josef Medical Center, University of Regensburg, Landshuter Str. 65, 93053, Regensburg, Germany
| | - Florian Zeman
- Centre for Clinical Studies, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Timo Seyfried
- Department of Anesthesiology, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Matthias Lubnow
- Department of Internal Medicine II, University Medical Center Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany
| | - Maximilian Burger
- Department of Urology, Caritas St. Josef Medical Center, University of Regensburg, Landshuter Str. 65, 93053, Regensburg, Germany
| | - Stefan Denzinger
- Department of Urology, Caritas St. Josef Medical Center, University of Regensburg, Landshuter Str. 65, 93053, Regensburg, Germany
| | - Michael T Pawlik
- Department of Anesthesiology, Caritas St. Josef Medical Center, University of Regensburg, Landshuter Str. 65, 93053, Regensburg, Germany
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Chacon MM, Cheruku SR, Neuburger PJ, Lester L, Shillcutt SK. Perioperative Care of the Obese Cardiac Surgical Patient. J Cardiothorac Vasc Anesth 2017; 32:1911-1921. [PMID: 29358013 DOI: 10.1053/j.jvca.2017.12.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Indexed: 02/06/2023]
Abstract
Morbid obesity is associated with impairment of cardiovascular, pulmonary, gastrointestinal, and renal physiology with significant perioperative consequences and has been linked with higher morbidity and mortality after cardiac surgery. Cardiac surgery patients have a higher incidence of difficult airway and difficult laryngoscopy than general surgery patients do, and obesity is associated with difficult mask ventilation and direct laryngoscopy. Positioning injuries occur more frequently because obese patients are at greater risk of pressure injury, such as rhabdomyolysis and compartment syndrome. Despite the association between obesity and several chronic disease states, the effects of obesity on perioperative outcomes are conflicting. Studies examining outcomes of overweight and obese patients in cardiac surgery have reported varying results. An "obesity paradox" has been described, in which the mortality for overweight and obese patients is lower compared with patients of normal weight. This review describes the physiologic abnormalities and clinical implications of obesity in cardiac surgery and summarizes recommendations for anesthesiologists to optimize perioperative care of the obese cardiac surgical patient.
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Erratum to Protective intraoperative ventilation with higher versus lower levels of positive end-expiratory pressure in obese patients (PROBESE): study protocol for a randomized controlled trial. Trials 2017; 18:247. [PMID: 28571581 PMCID: PMC5455073 DOI: 10.1186/s13063-017-1987-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 05/17/2017] [Indexed: 11/10/2022] Open
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