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Wong JJM, Dang H, Gan CS, Phan PH, Kurosawa H, Aoki K, Lee SW, Ong JSM, Fan L, Tai CW, Chuah SL, Lee PC, Chor YK, Ngu L, Anantasit N, Liu C, Xu W, Wati DK, Gede SIB, Jayashree M, Liauw F, Pon KM, Huang L, Chong JY, Zhu X, Hon KLE, Leung KKY, Samransamruajkit R, Cheung YB, Lee JH. Lung-Protective Ventilation for Pediatric Acute Respiratory Distress Syndrome: A Nonrandomized Controlled Trial. Crit Care Med 2024:00003246-990000000-00353. [PMID: 38920618 DOI: 10.1097/ccm.0000000000006357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
OBJECTIVES Despite the recommendation for lung-protective mechanical ventilation (LPMV) in pediatric acute respiratory distress syndrome (PARDS), there is a lack of robust supporting data and variable adherence in clinical practice. This study evaluates the impact of an LPMV protocol vs. standard care and adherence to LPMV elements on mortality. We hypothesized that LPMV strategies deployed as a pragmatic protocol reduces mortality in PARDS. DESIGN Multicenter prospective before-and-after comparison design study. SETTING Twenty-one PICUs. PATIENTS Patients fulfilled the Pediatric Acute Lung Injury Consensus Conference 2015 definition of PARDS and were on invasive mechanical ventilation. INTERVENTIONS The LPMV protocol included a limit on peak inspiratory pressure (PIP), delta/driving pressure (DP), tidal volume, positive end-expiratory pressure (PEEP) to Fio2 combinations of the low PEEP acute respiratory distress syndrome network table, permissive hypercarbia, and conservative oxygen targets. MEASUREMENTS AND MAIN RESULTS There were 285 of 693 (41·1%) and 408 of 693 (58·9%) patients treated with and without the LPMV protocol, respectively. Median age and oxygenation index was 1.5 years (0.4-5.3 yr) and 10.9 years (7.0-18.6 yr), respectively. There was no difference in 60-day mortality between LPMV and non-LPMV protocol groups (65/285 [22.8%] vs. 115/406 [28.3%]; p = 0.104). However, total adherence score did improve in the LPMV compared to non-LPMV group (57.1 [40.0-66.7] vs. 47.6 [31.0-58.3]; p < 0·001). After adjusting for confounders, adherence to LPMV strategies (adjusted hazard ratio, 0.98; 95% CI, 0.97-0.99; p = 0.004) but not the LPMV protocol itself was associated with a reduced risk of 60-day mortality. Adherence to PIP, DP, and PEEP/Fio2 combinations were associated with reduced mortality. CONCLUSIONS Adherence to LPMV elements over the first week of PARDS was associated with reduced mortality. Future work is needed to improve implementation of LPMV in order to improve adherence.
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Affiliation(s)
- Judith Ju Ming Wong
- Children's Intensive Care Unit, KK Women's and Children's Hospital, Singapore
- Duke-NUS Medical School, Singapore
| | - Hongxing Dang
- Children's Hospital of Chongqing Medical University, Chongqing, China
- China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, China
| | - Chin Seng Gan
- Department of Paediatrics, University Malaya Medical Centre, University Malaya, Kuala Lumpur, Malaysia
| | - Phuc Huu Phan
- Vietnam National Children's Hospital, Hanoi, Vietnam
| | | | - Kazunori Aoki
- Hyogo Prefectural Kobe Children's Hospital, Hyogo, Japan
| | - Siew Wah Lee
- Sultanah Aminah Hospital, Johor, Malaysia
- Hospital Tengku Ampuan Rahimah, Selangor, Malaysia
| | | | - Lijia Fan
- Division of Paediatric Critical Care, National University Hospital, Singapore
| | - Chian Wern Tai
- Universiti Kebangsaan Malaysia Specialist Children's Hospital, Kuala Lumpur, Malaysia
| | - Soo Lin Chuah
- Department of Paediatrics, University Malaya Medical Centre, University Malaya, Kuala Lumpur, Malaysia
| | - Pei Chuen Lee
- Universiti Kebangsaan Malaysia Specialist Children's Hospital, Kuala Lumpur, Malaysia
| | | | - Louise Ngu
- Sarawak General Hospital, Sarawak, Malaysia
| | | | - Chunfeng Liu
- Shengjing Hospital of China Medical University, Liaoning, China
| | - Wei Xu
- Shengjing Hospital of China Medical University, Liaoning, China
| | - Dyah Kanya Wati
- Pediatric Emergency and Intensive Care Unit, Prof I.G.N.G Ngoerah Hospital, Bali, Indonesia
- Medical Faculty, Udayana University, Bali, Indonesia
| | - Suparyatha Ida Bagus Gede
- Pediatric Emergency and Intensive Care Unit, Prof I.G.N.G Ngoerah Hospital, Bali, Indonesia
- Medical Faculty, Udayana University, Bali, Indonesia
| | | | - Felix Liauw
- Harapan Kita National Women and Children Health Center, Jakarta, Indonesia
| | | | - Li Huang
- Guangzhou Women and Children's Medical Center, Guangdong, China
| | - Jia Yueh Chong
- Hospital Tunku Azizah Kuala Lumpur, Kuala Lumpur, Malaysia
| | - Xuemei Zhu
- Children's Hospital of Fudan University, Shanghai, China
| | - Kam Lun Ellis Hon
- Paediatric Intensive Care Unit, Hong Kong Children's Hospital, Hong Kong Special Administrative Region, China
| | - Karen Ka Yan Leung
- Paediatric Intensive Care Unit, Hong Kong Children's Hospital, Hong Kong Special Administrative Region, China
| | - Rujipat Samransamruajkit
- Division of Pediatric Critical Care, King Chulalongkorn Memorial Hospital, Bangkok, Thailand
- Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Yin Bun Cheung
- Duke-NUS Medical School, Singapore
- Tampere Center for Child, Adolescent and Maternal Health Research, Tampere University, Tampere, Finland
| | - Jan Hau Lee
- Children's Intensive Care Unit, KK Women's and Children's Hospital, Singapore
- Duke-NUS Medical School, Singapore
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Zhang L, Sun Y, Sui X, Zhang J, Zhao J, Zhou R, Xu W, Yin C, He Z, Sun Y, Liu C, Song A, Han F. Hypocapnia is associated with increased in-hospital mortality and 1 year mortality in acute heart failure patients. ESC Heart Fail 2024. [PMID: 38600875 DOI: 10.1002/ehf2.14763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 02/29/2024] [Accepted: 03/06/2024] [Indexed: 04/12/2024] Open
Abstract
AIMS Both hypercapnia and hypocapnia are common in patients with acute heart failure (AHF), but the association between partial pressure of arterial carbon dioxide (PaCO2) and AHF prognosis remains unclear. The objective of this study was to investigate the connection between PaCO2 within 24 h after admission to the intensive care unit (ICU) and mortality during hospitalization and at 1 year in AHF patients. METHODS AND RESULTS AHF patients were enrolled from the Medical Information Mart for Intensive Care IV database. The patients were divided into three groups by PaCO2 values of <35, 35-45, and >45 mmHg. The primary outcome was to investigate the connection between PaCO2 and in-hospital mortality and 1 year mortality in AHF patients. The secondary outcome was to assess the prediction value of PaCO2 in predicting in-hospital mortality and 1 year mortality in AHF patients. A total of 2374 patients were included in this study, including 457 patients in the PaCO2 < 35 mmHg group, 1072 patients in the PaCO2 = 35-45 mmHg group, and 845 patients in the PaCO2 > 45 mmHg group. The in-hospital mortality was 19.5%, and the 1 year mortality was 23.9% in the PaCO2 < 35 mmHg group. Multivariate logistic regression analysis showed that the PaCO2 < 35 mmHg group was associated with an increased risk of in-hospital mortality [hazard ratio (HR) 1.398, 95% confidence interval (CI) 1.039-1.882, P = 0.027] and 1 year mortality (HR 1.327, 95% CI 1.020-1.728, P = 0.035) than the PaCO2 = 35-45 mmHg group. The PaCO2 > 45 mmHg group was associated with an increased risk of in-hospital mortality (HR 1.387, 95% CI 1.050-1.832, P = 0.021); the 1 year mortality showed no significant difference (HR 1.286, 95% CI 0.995-1.662, P = 0.055) compared with the PaCO2 = 35-45 mmHg group. The Kaplan-Meier survival curves showed that the PaCO2 < 35 mmHg group had a significantly lower 1 year survival rate. The area under the receiver operating characteristic curve for predicting in-hospital mortality was 0.591 (95% CI 0.526-0.656), and the 1 year mortality was 0.566 (95% CI 0.505-0.627) in the PaCO2 < 35 mmHg group. CONCLUSIONS In AHF patients, hypocapnia within 24 h after admission to the ICU was associated with increased in-hospital mortality and 1 year mortality. However, the increase in 1 year mortality may be influenced by hospitalization mortality. Hypercapnia was associated with increased in-hospital mortality.
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Affiliation(s)
- Lei Zhang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yiwu Sun
- Department of Anesthesiology, Dazhou Central Hospital, Dazhou, China
| | - Xin Sui
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Jian Zhang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Jingshun Zhao
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Runfeng Zhou
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Wenjia Xu
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Chengke Yin
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Zhaoyi He
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yufei Sun
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Chang Liu
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Ailing Song
- Department of Anesthesiology, Shanghai Jiao Tong University First People's Hospital (Shanghai General Hospital), Shanghai, China
| | - Fei Han
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
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Henrique LR, Souza MB, El Kadri RM, Boniatti MM, Rech TH. Prognosis of critically ill patients with extreme acidosis: A retrospective study. J Crit Care 2023; 78:154381. [PMID: 37480659 DOI: 10.1016/j.jcrc.2023.154381] [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: 04/01/2023] [Revised: 06/27/2023] [Accepted: 07/13/2023] [Indexed: 07/24/2023]
Abstract
OBJECTIVE This study aims to assess the impact of different subtypes of extreme acidosis on the mortality of critically ill patients. METHODS This retrospective cohort study included critically ill patients who were admitted to the intensive care unit (ICU) with a pH level <7. Clinical data and blood gas analyses were collected from electronic medical records. The primary outcome was in-hospital mortality. The use of vasopressors, mechanical ventilation (MV), and renal replacement therapy (RRT), the duration of MV and RRT, and the length of ICU and hospital stay were secondary outcomes. The simplified Stewart approach to acid-base disorders was used to analyze the causes of acidosis. RESULTS A total of 231 patients with 371 arterial blood gas analyses with pH < 7 were admitted from January 2012 to December 2021 and 222 were included in the study. Out of the 222 patients analyzed, respiratory acidosis was the primary disorder in 11.3% of patients (n = 25), metabolic acidosis in 33.8% (n = 75), and mixed acidosis in 55% (n = 122). Overall mortality was 42.8% (n = 95). No significant difference was observed in mortality among patients with respiratory, metabolic, or mixed acidosis (28%, 42.7%, and 45.9%, respectively; p = 0.26). The primary disorder affected the use of vasopressors and MV, the duration of MV, and the length of ICU and hospital stay. Patients with extreme acidosis due to unmeasured anions with lactate levels of 4 mmol/L or higher had higher mortality compared with patients with lactate levels <4 mmol/L (55.6% and 27.7%, respectively; p = 0.007). CONCLUSION Among critically ill patients with extreme acidosis, the primary disorder is not associated with mortality, but it is associated with the use of vasopressors and MV, the duration of MV, and the length of ICU and hospital stay. Additionally, hyperlactatemia is a predictor of poor prognosis in patients with extreme acidosis.
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Affiliation(s)
- Lílian Rodrigues Henrique
- Internal Medicine Division, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil; Graduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | - Riad Mahmoud El Kadri
- Internal Medicine Division, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil
| | - Márcio Manozzo Boniatti
- Intensive Care Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil; Graduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Tatiana H Rech
- Graduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Intensive Care Unit, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil; Department of Internal Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
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4
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Vemuri SV, Rolfsen ML, Sykes AV, Takiar PG, Leonard AJ, Malhotra A, Spragg RG, Macedo E, Hepokoski ML. Association Between Acute Kidney Injury During Invasive Mechanical Ventilation and ICU Outcomes and Respiratory System Mechanics. Crit Care Explor 2022; 4:e0720. [PMID: 35782295 PMCID: PMC9246080 DOI: 10.1097/cce.0000000000000720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Compare ICU outcomes and respiratory system mechanics in patients with and without acute kidney injury during invasive mechanical ventilation.
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5
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Smith LM, Glauser JM. Managing Severe Hypoxic Respiratory Failure in COVID-19. CURRENT EMERGENCY AND HOSPITAL MEDICINE REPORTS 2022; 10:31-35. [PMID: 35572208 PMCID: PMC9091541 DOI: 10.1007/s40138-022-00245-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2022] [Indexed: 12/11/2022]
Abstract
Purpose of Review Adult respiratory distress syndrome is a life-threatening complication from severe COVID-19 infection resulting in severe hypoxic respiratory failure. Strategies at improving oxygenation have evolved over the course of the pandemic. Recent Findings Although non-invasive respiratory support reduces the need for intubation, a significant number of patients with COVID-19 progress to invasive mechanical ventilation. Once intubated, a lung protective ventilation strategy should be employed that limits tidal volumes to 6 ml/kg of predicted body weight and employs sufficient positive end-expiratory pressure to maximize oxygen delivery while minimizing the fraction of inspired oxygen. Intermittent prone positioning is effective at improving survival, and there is a growing body of evidence that it can be safely performed in spontaneously breathing patients to reduce the need for invasive mechanical ventilation. Inhaled pulmonary vasodilators have not been shown to improve survival or cost-effectiveness in COVID-19 and should be used selectively. Summary Finally, the best outcomes are likely achieved at centers with experience at severe ARDS management and protocols for escalation of care.
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Affiliation(s)
- Lane M. Smith
- Division of Critical Care Medicine, Department of Anesthesiology, University of Michigan Health System, 4172 Cardiovascular Center, 1500 East Medical Center Dr., SPC 5861, Ann Arbor, MI 48109-5861 USA
| | - Jonathan M. Glauser
- Department of Emergency Medicine, MetroHealth System and Case Western Reserve University, Cleveland, OH 44109 USA
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Granell-Gil M, Murcia-Anaya M, Sevilla S, Martínez-Plumed R, Biosca-Pérez E, Cózar-Bernal F, Garutti I, Gallart L, Ubierna-Ferreras B, Sukia-Zilbeti I, Gálvez-Muñoz C, Delgado-Roel M, Mínguez L, Bermejo S, Valencia O, Real M, Unzueta C, Ferrando C, Sánchez F, González S, Ruiz-Villén C, Lluch A, Hernández A, Hernández-Beslmeisl J, Vives M, Vicente R. Clinical guide to perioperative management for videothoracoscopy lung resection (Section of Cardiac, Vascular and Thoracic Anesthesia, SEDAR; Spanish Society of Thoracic Surgery, SECT; Spanish Society of Physiotherapy). REVISTA ESPANOLA DE ANESTESIOLOGIA Y REANIMACION 2022; 69:266-301. [PMID: 35610172 DOI: 10.1016/j.redare.2021.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 03/19/2021] [Indexed: 06/15/2023]
Abstract
The introduction of video-assisted thoracoscopic (VATS) techniques has led to a new approach in thoracic surgery. VATS is performed by inserting a thoracoscope through a small incisions in the chest wall, thus maximizing the preservation of muscle and tissue. Because of its low rate of morbidity and mortality, VATS is currently the technique of choice in most thoracic procedures. Lung resection by VATS reduces prolonged air leaks, arrhythmia, pneumonia, postoperative pain and inflammatory markers. This reduction in postoperative complications shortens hospital length of stay, and is particularly beneficial in high-risk patients with low tolerance to thoracotomy. Compared with conventional thoracotomy, the oncological results of VATS surgery are similar or even superior to those of open surgery. This aim of this multidisciplinary position statement produced by the thoracic surgery working group of the Spanish Society of Anesthesiology and Reanimation (SEDAR), the Spanish Society of Thoracic Surgery (SECT), and the Spanish Association of Physiotherapy (AEF) is to standardize and disseminate a series of perioperative anaesthesia management guidelines for patients undergoing VATS lung resection surgery. Each recommendation is based on an in-depth review of the available literature by the authors. In this document, the care of patients undergoing VATS surgery is organized in sections, starting with the surgical approach, and followed by the three pillars of anaesthesia management: preoperative, intraoperative, and postoperative anaesthesia.
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Affiliation(s)
- M Granell-Gil
- Sección en Anestesiología, Reanimación y T. Dolor, Consorcio Hospital General Universitario de Valencia, Profesor Contratado Doctor en Anestesiología, Universitat de València, Valencia, Spain
| | - M Murcia-Anaya
- Anestesiología, Reanimación y T. Dolor, Unidad de Cuidados Intensivos, Hospital IMED Valencia, Valencia, Spain.
| | - S Sevilla
- Sociedad de Cirugía Torácica, Complejo Hospitalario Universitario de Jaén, Jaén, Spain
| | - R Martínez-Plumed
- Anestesiología, Reanimación y T. Dolor, Consorcio Hospital General Universitario de Valencia, Valencia, Spain
| | - E Biosca-Pérez
- Anestesiología, Reanimación y T. Dolor, Consorcio Hospital General Universitario de Valencia, Valencia, Spain
| | - F Cózar-Bernal
- Cirugía Torácica, Hospital Universitario Virgen Macarena, Sevilla, Spain
| | - I Garutti
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - L Gallart
- Anestesiología, Reanimación y T. Dolor, Hospital del Mar de Barcelona, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | - I Sukia-Zilbeti
- Fisioterapia, Hospital Universitario Donostia de San Sebastián, Spain
| | - C Gálvez-Muñoz
- Cirugía Torácica, Hospital General Universitario de Alicante, Alicante, Spain
| | - M Delgado-Roel
- Cirugía Torácica, Complejo Hospitalario Universitario La Coruña, La Coruña, Spain
| | - L Mínguez
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario La Fe de Valencia, Valencia, Spain
| | - S Bermejo
- Anestesiología, Reanimación y T. Dolor, Hospital del Mar de Barcelona, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - O Valencia
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Doce de Octubre de Madrid, Madrid, Spain
| | - M Real
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Doce de Octubre de Madrid, Madrid, Spain
| | - C Unzueta
- Anestesiología, Reanimación y T. Dolor, Hospital Sant Pau de Barcelona, Barcelona, Spain
| | - C Ferrando
- Anestesiología, Reanimación y T. Dolor, Hospital Clínic Universitari de Barcelona, Barcelona, Spain
| | - F Sánchez
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario de la Ribera de Alzira, Valencia, Spain
| | - S González
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Donostia de San Sebastián, Spain
| | - C Ruiz-Villén
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Reina Sofía de Córdoba, Córdoba, Spain
| | - A Lluch
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario La Fe de Valencia, Valencia, Spain
| | - A Hernández
- Anestesiología, Reanimación y T. Dolor, Grupo Policlínica de Ibiza, Ibiza, Spain
| | - J Hernández-Beslmeisl
- Anestesiología, Reanimación y T. Dolor, Complejo Hospitalario Universitario de Canarias, Canarias, Spain
| | - M Vives
- Anestesiología, Reanimación y T. Dolor, Hospital Universitari Dr. Josep Trueta de Girona, Girona, Spain
| | - R Vicente
- Sección de Anestesia Cardiaca, Vascular y Torácica, SEDAR, Anestesiología, Reanimación y T. Dolor, Hospital Universitario La Fe de Valencia, Universitat de València, Valencia, Spain
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Gendreau S, Geri G, Pham T, Vieillard-Baron A, Mekontso Dessap A. The role of acute hypercapnia on mortality and short-term physiology in patients mechanically ventilated for ARDS: a systematic review and meta-analysis. Intensive Care Med 2022; 48:517-534. [PMID: 35294565 PMCID: PMC8924945 DOI: 10.1007/s00134-022-06640-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 02/03/2022] [Indexed: 12/29/2022]
Abstract
Purpose Hypercapnia is frequent during mechanical ventilation for acute respiratory distress syndrome (ARDS), but its effects on morbidity and mortality are still controversial. We conducted a systematic review and meta-analysis to explore clinical consequences of acute hypercapnia in adult patients ventilated for ARDS. Methods We searched Medline, Embase, and the Cochrane Library via the OVID platform for studies published from 1946 to 2021. “Permissive hypercapnia” defined hypercapnia in studies where the group with hypercapnia was ventilated with a protective ventilation (PV) strategy (lower VT targeting 6 ml/kg predicted body weight) while the group without hypercapnia was managed with a non-protective ventilation (NPV); “imposed hypercapnia” defined hypercapnia in studies where hypercapnic and non-hypercapnic patients were managed with a similar ventilation strategy. Results Twenty-nine studies (10,101 patients) were included. Permissive hypercapnia, imposed hypercapnia under PV, and imposed hypercapnia under NPV were reported in 8, 21 and 1 study, respectively. Studies testing permissive hypercapnia reported lower mortality in hypercapnic patients receiving PV as compared to non-hypercapnic patients receiving NPV: OR = 0.26, 95% CI [0.07–0.89]. By contrast, studies reporting imposed hypercapnia under PV reported increased mortality in hypercapnic patients receiving PV as compared to non-hypercapnic patients also receiving PV: OR = 1.54, 95% CI [1.15–2.07]. There was a significant interaction between the mechanism of hypercapnia and the effect on mortality. Conclusions Clinical effects of hypercapnia are conflicting depending on its mechanism. Permissive hypercapnia was associated with improved mortality contrary to imposed hypercapnia under PV, suggesting a major role of PV strategy on the outcome. Supplementary Information The online version contains supplementary material available at 10.1007/s00134-022-06640-1.
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Affiliation(s)
- Ségolène Gendreau
- AP-HP, Hôpitaux Universitaires Henri-Mondor, Service de Médecine Intensive-Réanimation, 94010, Créteil, France
- Université Paris Est Créteil, CARMAS, 94010, Créteil, France
- Université Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France
| | - Guillaume Geri
- AP-HP, Hôpital Universitaire Ambroise-Paré, Service de Médecine Intensive Réanimation, 92100, Boulogne-Billancourt, France
- Université de Paris Saclay, INSERM UMR 1018, Clinical Epidemiology Team, CESP, Villejuif, France
| | - Tai Pham
- AP-HP, Hôpital de Bicêtre, DMU CORREVE, Service de Médecine Intensive-Réanimation, Université Paris-Saclay, Inserm UMR S_999, FHU SEPSIS, Groupe de Recherche Clinique CARMAS, Le Kremlin-Bicêtre, France
- Université Paris-Saclay, UVSQ, Univ. Paris-Sud, Inserm U1018, Equipe d'Epidémiologie respiratoire intégrative, CESP, 94807, Villejuif, France
| | - Antoine Vieillard-Baron
- AP-HP, Hôpital Universitaire Ambroise-Paré, Service de Médecine Intensive Réanimation, 92100, Boulogne-Billancourt, France
- Université de Paris Saclay, INSERM UMR 1018, Clinical Epidemiology Team, CESP, Villejuif, France
| | - Armand Mekontso Dessap
- AP-HP, Hôpitaux Universitaires Henri-Mondor, Service de Médecine Intensive-Réanimation, 94010, Créteil, France.
- Université Paris Est Créteil, CARMAS, 94010, Créteil, France.
- Université Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France.
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Tiruvoipati R, Serpa Neto A, Young M, Marhoon N, Wilson J, Gupta S, Pilcher D, Bailey M, Bellomo R. An Exploratory Analysis of the Association between Hypercapnia and Hospital Mortality in Critically Ill Patients with Sepsis. Ann Am Thorac Soc 2022; 19:245-254. [PMID: 34380007 DOI: 10.1513/annalsats.202102-104oc] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Rationale: Hypercapnia may affect the outcome of sepsis. Very few clinical studies conducted in noncritically ill patients have investigated the effects of hypercapnia and hypercapnic acidemia in the context of sepsis. The effect of hypercapnia in critically ill patients with sepsis remains inadequately studied. Objectives: To investigate the association of hypercapnia with hospital mortality in critically ill patients with sepsis. Methods: This is a retrospective study conducted in three tertiary public hospitals. Critically ill patients with sepsis from three intensive care units between January 2011 and May 2019 were included. Five cohorts (exposure of at least 24, 48, 72, 120, and 168 hours) were created to account for immortal time bias and informative censoring. The association between hypercapnia exposure and hospital mortality was assessed with multivariable models. Subgroup analyses compared ventilated versus nonventilated and pulmonary versus nonpulmonary sepsis patients. Results: We analyzed 84,819 arterial carbon dioxide pressure measurements in 3,153 patients (57.6% male; median age was 62.5 years). After adjustment for key confounders, both in mechanically ventilated and nonventilated patients and in patients with pulmonary or nonpulmonary sepsis, there was no independent association of hypercapnia with hospital mortality. In contrast, in ventilated patients, the presence of prolonged exposure to both hypercapnia and acidemia was associated with increased mortality (highest odds ratio of 16.5 for ⩾120 hours of potential exposure; P = 0.007). Conclusions: After adjustment, isolated hypercapnia was not associated with increased mortality in patients with sepsis, whereas prolonged hypercapnic acidemia was associated with increased risk of mortality. These hypothesis-generating observations suggest that as hypercapnia is not an independent risk factor for mortality, trials of permissive hypercapnia avoiding or minimizing acidemia in sepsis may be safe.
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Affiliation(s)
- Ravindranath Tiruvoipati
- Department of Intensive Care Medicine, Peninsula Health, Melbourne, Victoria, Australia
- Australian and New Zealand Intensive Care Research Centre, Peninsula Clinical School, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Ary Serpa Neto
- Australian and New Zealand Intensive Care Research Centre, Peninsula Clinical School, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Marcus Young
- Department of Intensive Care, Austin Health, Heidelberg, Victoria, Australia
| | - Nada Marhoon
- Department of Intensive Care, Austin Health, Heidelberg, Victoria, Australia
| | - John Wilson
- Peninsula Health Informatics, Frankston Hospital, Melbourne, Victoria, Australia
| | - Sachin Gupta
- Department of Intensive Care Medicine, Peninsula Health, Melbourne, Victoria, Australia
- Australian and New Zealand Intensive Care Research Centre, Peninsula Clinical School, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - David Pilcher
- Australian and New Zealand Intensive Care Research Centre, Peninsula Clinical School, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
- Department of Intensive Care Medicine, The Alfred Hospital, Melbourne, Victoria, Australia; and
| | - Michael Bailey
- Australian and New Zealand Intensive Care Research Centre, Peninsula Clinical School, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
- Data Analytics Research and Evaluation, the University of Melbourne and Austin Hospital, Melbourne, Victoria, Australia
| | - Rinaldo Bellomo
- Australian and New Zealand Intensive Care Research Centre, Peninsula Clinical School, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
- Department of Intensive Care, Austin Health, Heidelberg, Victoria, Australia
- Data Analytics Research and Evaluation, the University of Melbourne and Austin Hospital, Melbourne, Victoria, Australia
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9
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Leligdowicz A, Matthay MA. Carbonic Anhydrase IX: Scaring Away the Grim Reaper in Acute Lung Injury? Am J Respir Cell Mol Biol 2021; 65:573-575. [PMID: 34375573 PMCID: PMC8641805 DOI: 10.1165/rcmb.2021-0310ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
| | - Michael A Matthay
- Cardiovascular Research Institute (CVRI), University of San Francisco, Medicine and Anesthesia, San Francisco, California, United States;
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Granell-Gil M, Murcia-Anaya M, Sevilla S, Martínez-Plumed R, Biosca-Pérez E, Cózar-Bernal F, Garutti I, Gallart L, Ubierna-Ferreras B, Sukia-Zilbeti I, Gálvez-Muñoz C, Delgado-Roel M, Mínguez L, Bermejo S, Valencia O, Real M, Unzueta C, Ferrando C, Sánchez F, González S, Ruiz-Villén C, Lluch A, Hernández A, Hernández-Beslmeisl J, Vives M, Vicente R. Clinical guide to perioperative management for videothoracoscopy lung resection (Section of Cardiac, Vascular and Thoracic Anesthesia, SEDAR; Spanish Society of Thoracic Surgery, SECT; Spanish Society of Physiotherapy). REVISTA ESPANOLA DE ANESTESIOLOGIA Y REANIMACION 2021; 69:S0034-9356(21)00129-8. [PMID: 34330548 DOI: 10.1016/j.redar.2021.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 03/09/2021] [Accepted: 03/19/2021] [Indexed: 10/20/2022]
Abstract
The introduction of video-assisted thoracoscopic (VATS) techniques has led to a new approach in thoracic surgery. VATS is performed by inserting a thoracoscope through a small incisions in the chest wall, thus maximizing the preservation of muscle and tissue. Because of its low rate of morbidity and mortality, VATS is currently the technique of choice in most thoracic procedures. Lung resection by VATS reduces prolonged air leaks, arrhythmia, pneumonia, postoperative pain and inflammatory markers. This reduction in postoperative complications shortens hospital length of stay, and is particularly beneficial in high-risk patients with low tolerance to thoracotomy. Compared with conventional thoracotomy, the oncological results of VATS surgery are similar or even superior to those of open surgery. This aim of this multidisciplinary position statement produced by the thoracic surgery working group of the Spanish Society of Anesthesiology and Reanimation (SEDAR), the Spanish Society of Thoracic Surgery (SECT), and the Spanish Association of Physiotherapy (AEF) is to standardize and disseminate a series of perioperative anaesthesia management guidelines for patients undergoing VATS lung resection surgery. Each recommendation is based on an in-depth review of the available literature by the authors. In this document, the care of patients undergoing VATS surgery is organized in sections, starting with the surgical approach, and followed by the three pillars of anaesthesia management: preoperative, intraoperative, and postoperative anaesthesia.
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Affiliation(s)
- M Granell-Gil
- Sección en Anestesiología, Reanimación y T. Dolor, Consorcio Hospital General Universitario de Valencia, Profesor Contratado Doctor en Anestesiología, Universitat de València, Valencia, España
| | - M Murcia-Anaya
- Anestesiología, Reanimación y T. Dolor, Unidad de Cuidados Intensivos, Hospital IMED Valencia, Valencia, España.
| | - S Sevilla
- Sociedad de Cirugía Torácica, Complejo Hospitalario Universitario de Jaén, Jaén, España
| | - R Martínez-Plumed
- Anestesiología, Reanimación y T. Dolor, Consorcio Hospital General Universitario de Valencia, Valencia, España
| | - E Biosca-Pérez
- Anestesiología, Reanimación y T. Dolor, Consorcio Hospital General Universitario de Valencia, Valencia, España
| | - F Cózar-Bernal
- Cirugía Torácica, Hospital Universitario Virgen Macarena, Sevilla, España
| | - I Garutti
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Gregorio Marañón, Madrid, España
| | - L Gallart
- Anestesiología, Reanimación y T. Dolor, Hospital del Mar de Barcelona, Universitat Autònoma de Barcelona, Barcelona, España
| | | | - I Sukia-Zilbeti
- Fisioterapia, Hospital Universitario Donostia, San Sebastián, España
| | - C Gálvez-Muñoz
- Cirugía Torácica, Hospital General Universitario de Alicante, Alicante, España
| | - M Delgado-Roel
- Cirugía Torácica, Complejo Hospitalario Universitario La Coruña, La Coruña, España
| | - L Mínguez
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario La Fe de Valencia, Valencia, España
| | - S Bermejo
- Anestesiología, Reanimación y T. Dolor, Hospital del Mar de Barcelona, Universitat Autònoma de Barcelona, Barcelona, España
| | - O Valencia
- Anestesiología, Reanimación y T. Dolor. Hospital Universitario Doce de Octubre de Madrid, Madrid, España
| | - M Real
- Anestesiología, Reanimación y T. Dolor. Hospital Universitario Doce de Octubre de Madrid, Madrid, España
| | - C Unzueta
- Anestesiología, Reanimación y T. Dolor. Hospital Sant Pau de Barcelona, Barcelona, España
| | - C Ferrando
- Anestesiología, Reanimación y T. Dolor. Hospital Clínic Universitari de Barcelona, Barcelona, España
| | - F Sánchez
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario de la Ribera de Alzira, Valencia, España
| | - S González
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Donostia de San Sebastián, España
| | - C Ruiz-Villén
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario Reina Sofía de Córdoba, Córdoba, España
| | - A Lluch
- Anestesiología, Reanimación y T. Dolor, Hospital Universitario La Fe de Valencia, Valencia, España
| | - A Hernández
- Anestesiología, Reanimación y T. Dolor, Grupo Policlínica de Ibiza, Ibiza, España
| | - J Hernández-Beslmeisl
- Anestesiología, Reanimación y T. Dolor, Complejo Hospitalario Universitario de Canarias, Canarias, España
| | - M Vives
- Anestesiología, Reanimación y T. Dolor, Hospital Universitari Dr. Josep Trueta de Girona, Girona, España
| | - R Vicente
- Sección de Anestesia Cardiaca, Vascular y Torácica, SEDAR, Anestesiología, Reanimación y T. Dolor. Hospital Universitario La Fe de Valencia, Universitat de València, Valencia, España
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11
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Chen Y, Wang S, Huang J, Fu Y, Wen J, Zhou C, Fu Y, Liu L. Application of extracorporeal carbon dioxide removal combined with continuous blood purification therapy in ARDS with hypercapnia in patients with critical COVID-19. Clin Hemorheol Microcirc 2021; 78:199-207. [PMID: 33554895 DOI: 10.3233/ch-201080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
INTRODUCTION Coronavirus disease-19 (COVID-19) is a new type of epidemic pneumonia caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The population is generally susceptible to COVID-19, which mainly causes lung injury. Some cases may develop severe acute respiratory distress syndrome (ARDS). Currently, ARDS treatment is mainly mechanical ventilation, but mechanical ventilation often causes ventilator-induced lung injury (VILI) accompanied by hypercapnia in 14% of patients. Extracorporeal carbon dioxide removal (ECCO2R) can remove carbon dioxide from the blood of patients with ARDS, correct the respiratory acidosis, reduce the tidal volume and airway pressure, and reduce the incidence of VILI. CASE REPORT Two patients with critical COVID-19 combined with multiple organ failure undertook mechanical ventilation and suffered from hypercapnia. ECCO2R, combined with continuous renal replacement therapy (CRRT), was conducted concomitantly. In both cases (No. 1 and 2), the tidal volume and positive end-expiratory pressure (PEEP) were down-regulated before the treatment and at 1.5 hours, one day, three days, five days, eight days, and ten days after the treatment, together with a noticeable decrease in PCO2 and clear increase in PO2, while FiO2 decreased to approximately 40%. In case No 2, compared with the condition before treatment, the PCO2 decreased significantly with down-regulation in the tidal volume and PEEP and improvement in the pulmonary edema and ARDS after the treatment. CONCLUSION ECCO2R combined with continuous blood purification therapy in patients with COVID-19 who are criti-cally ill and have ARDS and hypercapnia might gain both time and opportunity in the treatment, down-regulate the ventilator parameters, reduce the incidence of VILI and achieve favorable therapeutic outcomes.
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Affiliation(s)
- Ye Chen
- Department of Hemopurification Center, National Clinical Research Center for Infectious Diseases, The Third People's Hospital of Shenzhen, The Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Shouhong Wang
- Department of Critical Care Medicine, Guangdong Provincial Geriatrics Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Jianrong Huang
- Department of Hemopurification Center, National Clinical Research Center for Infectious Diseases, The Third People's Hospital of Shenzhen, The Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Yingyun Fu
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Southern University of Science and Technology, The Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong, China
| | - Juanmin Wen
- Fuwai Hospital Chinese Academy of Medical Sciences, Shenzhen, Guangdong, China
| | - Chengbin Zhou
- Department of Cardiovascular Surgery, Guangdong Provincial Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China
| | - Yang Fu
- School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Lei Liu
- National Clinical Research Center for Infectious Diseases, The Third People's Hospital of Shenzhen, The Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, Guangdong, China
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12
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Lee JY, Stevens RP, Kash M, Alexeyev MF, Balczon R, Zhou C, Renema P, Koloteva A, Kozhukhar N, Pastukh V, Gwin MS, Voth S, deWeever A, Wagener BM, Pittet JF, Eslaamizaad Y, Siddiqui W, Nawaz T, Clarke C, Fouty BW, Audia JP, Alvarez DF, Stevens T. Carbonic Anhydrase IX and Hypoxia Promote Rat Pulmonary Endothelial Cell Survival During Infection. Am J Respir Cell Mol Biol 2021; 65:630-645. [PMID: 34251286 DOI: 10.1165/rcmb.2020-0537oc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Low tidal volume ventilation protects the lung in mechanically ventilated patients. The impact of the accompanying permissive hypoxemia and hypercapnia on endothelial cell recovery from injury is poorly understood. Carbonic anhydrase IX (CA IX) is expressed in pulmonary microvascular endothelial cells (PMVECs), where it contributes to CO2 and pH homeostasis, bioenergetics and angiogenesis. We hypothesized that CA IX is important for PMVEC survival, and CA IX expression and release from PMVECs are increased during infection. While plasma CA IX was unchanged in human and rat pneumonia, there was a trend towards increasing CA IX in bronchoalveolar fluid of mechanically ventilated critically ill pneumonia patients and a significant increase in CA IX in lung tissue lysate of rat pneumonia. To investigate functional implications of the lung CA IX increase, we generated PMVEC cell lines harboring domain-specific CA IX mutations. Using these cells, we found that infection promotes intracellular expression, release and metalloproteinase-mediated extracellular cleavage of CA IX in PMVECs. Intracellular domain deletion uniquely impaired CA IX membrane localization. Loss of the CA IX intracellular domain promoted cell death following infection, suggesting the important role of intracellular domain in PMVEC survival. We also found that hypoxia improves survival, whereas hypercapnia reverses the protective effect of hypoxia, during infection. Thus, we report that: (1) CA IX increases in rat pneumonia lung; and, (2) the CA IX intracellular domain and hypoxia promote PMVEC survival during infection.
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Affiliation(s)
- Ji Young Lee
- University of South Alabama, 5557, Mobile, Alabama, United States;
| | - Reece P Stevens
- University of South Alabama, 5557, Mobile, Alabama, United States
| | - Mary Kash
- University of South Alabama, 5557, Mobile, Alabama, United States
| | | | - Ronald Balczon
- University of South Alabama, 5557, Biochemistry and Molecular Biology, Mobile, Alabama, United States
| | - Chun Zhou
- University of South Alabama, 5557, Mobile, Alabama, United States
| | - Phoibe Renema
- University of South Alabama, 5557, Mobile, Alabama, United States
| | - Anna Koloteva
- University of South Alabama, 5557, Mobile, Alabama, United States
| | | | | | - Meredith S Gwin
- University of South Alabama, 5557, Physiology and Cell Biology, Mobile, Alabama, United States
| | - Sarah Voth
- University of South Alabama, 5557, Physiology and Cell Biology, Mobile, Alabama, United States
| | - Althea deWeever
- University of South Alabama College of Medicine, 12214, Physiology and Cell Biology, Mobile, Alabama, United States
| | - Brant M Wagener
- The University of Alabama at Birmingham, 9968, Department of Anesthesiology and Perioperative Medicine, Birmingham, Alabama, United States
| | - Jean-François Pittet
- The University of Alabama at Birmingham, 9968, Department of Anesthesiology and Perioperative Medicine, Birmingham, Alabama, United States
| | | | - Waqar Siddiqui
- University of South Alabama, 5557, Mobile, Alabama, United States
| | - Talha Nawaz
- University of South Alabama, 5557, Mobile, Alabama, United States
| | | | - Brian W Fouty
- University of South Alabama, 5557, Mobile, Alabama, United States
| | - Jonathon P Audia
- University of South Alabama, 5557, Mobile, Alabama, United States
| | - Diego F Alvarez
- Sam Houston State University, 4038, Huntsville, Texas, United States
| | - Troy Stevens
- University of South Alabama, 5557, Physiology and Cell Biology, Mobile, Alabama, United States
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13
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Association Between Arterial Carbon Dioxide Tension and Clinical Outcomes in Venoarterial Extracorporeal Membrane Oxygenation. Crit Care Med 2021; 48:977-984. [PMID: 32574466 DOI: 10.1097/ccm.0000000000004347] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVES The manipulation of arterial carbon dioxide tension is associated with differential mortality and neurologic injury in intensive care and cardiac arrest patients; however, few studies have investigated this relationship in patients on venoarterial extracorporeal membrane oxygenation. We investigated the association between the initial arterial carbon dioxide tension and change over 24 hours on mortality and neurologic injury in patients undergoing venoarterial extracorporeal membrane oxygenation for cardiac arrest and refractory cardiogenic shock. DESIGN Retrospective cohort analysis of adult patients recorded in the international Extracorporeal Life Support Organization Registry. SETTING Data reported to the Extracorporeal Life Support Organization from all international extracorporeal membrane oxygenation centers during 2003-2016. PATIENTS Adult patients (≥ 18 yr old) supported with venoarterial extracorporeal membrane oxygenation. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS A total of 7,168 patients had sufficient data for analysis at the initiation of venoarterial extracorporeal membrane oxygenation, 4,918 of these patients had arterial carbon dioxide tension data available at 24 hours on support. The overall in-hospital mortality rate was 59.9%. A U-shaped relationship between arterial carbon dioxide tension tension at extracorporeal membrane oxygenation initiation and in-hospital mortality was observed. Increased mortality was observed with a arterial carbon dioxide tension less than 30 mm Hg (odds ratio, 1.26; 95% CI, 1.08-1.47; p = 0.003) and greater than 60 mm Hg (odds ratio, 1.28; 95% CI, 1.10-1.50; p = 0.002). Large reductions (> 20 mm Hg) in arterial carbon dioxide tension over 24 hours were associated with important neurologic complications: intracranial hemorrhage, ischemic stroke, and/or brain death, as a composite outcome (odds ratio, 1.63; 95% CI, 1.03-2.59; p = 0.04), independent of the initial arterial carbon dioxide tension. CONCLUSIONS Initial arterial carbon dioxide tension tension was independently associated with mortality in this cohort of venoarterial extracorporeal membrane oxygenation patients. Reductions in arterial carbon dioxide tension (> 20 mm Hg) from the initiation of extracorporeal membrane oxygenation were associated with neurologic complications. Further prospective studies testing these associations are warranted.
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14
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Effect of acute isooxic hypercapnia on oxidative activity of systemic neutrophils in endotoxemic rabbits. Cent Eur J Immunol 2021; 46:47-53. [PMID: 33897283 PMCID: PMC8056343 DOI: 10.5114/ceji.2021.105245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 08/27/2020] [Indexed: 12/14/2022] Open
Abstract
Introduction Whether carbon dioxide (CO2) affects systemic oxidative phenomena under conditions of endotoxemia is not sufficiently clarified. The study aimed to assess the impact of moderate acute hypercapnia on the respiratory burst of circulating neutrophils in mechanically ventilated endotoxemic rabbits. Material and methods Twenty-four endotoxemic rabbits were mechanically ventilated with standard or CO2-enriched gas mixture in order to obtain isooxic hypercapnia. At a baseline point and following 180 min of hypercapnic ventilation, luminol-dependent chemiluminescence (CL) of circulating neutrophils and serum 2-thiobarbituric acid reactive substance (TBARS) concentrations were measured. Throughout the study, leukocyte and neutrophil counts, pH status, circulatory parameters and body temperature were also assessed. Results Following 180 min of hypercapnic ventilation, opsonized zymosan (OZ)-stimulated neutrophils showed lower CL vs. the control group (p = 0.004). Other parameters studied were not affected. Conclusions Short-term isooxic hypercapnia in endotoxemic rabbits preserves circulating neutrophil count pattern and reactive oxygen species (ROS) generation, but it may reduce phagocytosis.
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Correlation of Arterial CO 2 and Respiratory Impedance Values among Subjects with COPD. J Clin Med 2020; 9:jcm9092819. [PMID: 32878165 PMCID: PMC7564107 DOI: 10.3390/jcm9092819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 12/15/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a respiratory illness characterized by airflow limitation and chronic respiratory symptoms with a global prevalence estimated to be more than 10% in 2010 and still on the rise. Furthermore, hypercapnic subject COPD leads to an increased risk of mortality, morbidity, and poor QoL (quality of life) than normocapnic subjects. Series of studies showed the usefulness of the forced oscillation technique (FOT) to measure small airway closure. Traditional findings suggested that hypercapnia may not be the main treating targets, but recent findings suggested that blood stream CO2 may lead to a worse outcome. This study aimed to seek the relationship between CO2 and small airway closure by using FOT. Subjects with COPD (n = 124; hypercapnia 22 and normocapnia 102) were analyzed for all pulmonary function values, FOT values, and arterial blood gas analysis. Student’s t-test, Spearman rank correlation, and multi linear regression analysis were used to analyze the data. COPD subjects with hypercapnia showed a significant increase in R5, R20, Fres, and ALX values, and a greater decrease in X5 value than normocapnic patients. Also, multiple linear regression analysis showed R5 was associated with hypercapnia. Hypercapnia may account for airway closure among subjects with COPD and this result suggests treating hypercapnia may lead to better outcomes for such a subject group.
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16
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Lung-Protective Mechanical Ventilation Strategies in Pediatric Acute Respiratory Distress Syndrome. Pediatr Crit Care Med 2020; 21:720-728. [PMID: 32205663 DOI: 10.1097/pcc.0000000000002324] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVES Reduced morbidity and mortality associated with lung-protective mechanical ventilation is not proven in pediatric acute respiratory distress syndrome. This study aims to determine if a lung-protective mechanical ventilation protocol in pediatric acute respiratory distress syndrome is associated with improved clinical outcomes. DESIGN This pilot study over April 2016 to September 2019 adopts a before-and-after comparison design of a lung-protective mechanical ventilation protocol. All admissions to the PICU were screened daily for fulfillment of the Pediatric Acute Lung Injury Consensus Conference criteria and included. SETTING Multidisciplinary PICU. PATIENTS Patients with pediatric acute respiratory distress syndrome. INTERVENTIONS Lung-protective mechanical ventilation protocol with elements on peak pressures, tidal volumes, end-expiratory pressure to FIO2 combinations, permissive hypercapnia, and permissive hypoxemia. MEASUREMENTS AND MAIN RESULTS Ventilator and blood gas data were collected for the first 7 days of pediatric acute respiratory distress syndrome and compared between the protocol (n = 63) and nonprotocol groups (n = 69). After implementation of the protocol, median tidal volume (6.4 mL/kg [5.4-7.8 mL/kg] vs 6.0 mL/kg [4.8-7.3 mL/kg]; p = 0.005), PaO2 (78.1 mm Hg [67.0-94.6 mm Hg] vs 74.5 mm Hg [59.2-91.1 mm Hg]; p = 0.001), and oxygen saturation (97% [95-99%] vs 96% [94-98%]; p = 0.007) were lower, and end-expiratory pressure (8 cm H2O [7-9 cm H2O] vs 8 cm H2O [8-10 cm H2O]; p = 0.002] and PaCO2 (44.9 mm Hg [38.8-53.1 mm Hg] vs 46.4 mm Hg [39.4-56.7 mm Hg]; p = 0.033) were higher, in keeping with lung protective measures. There was no difference in mortality (10/63 [15.9%] vs 18/69 [26.1%]; p = 0.152), ventilator-free days (16.0 [2.0-23.0] vs 19.0 [0.0-23.0]; p = 0.697), and PICU-free days (13.0 [0.0-21.0] vs 16.0 [0.0-22.0]; p = 0.233) between the protocol and nonprotocol groups. After adjusting for severity of illness, organ dysfunction and oxygenation index, the lung-protective mechanical ventilation protocol was associated with decreased mortality (adjusted hazard ratio, 0.37; 95% CI, 0.16-0.88). CONCLUSIONS In pediatric acute respiratory distress syndrome, a lung-protective mechanical ventilation protocol improved adherence to lung-protective mechanical ventilation strategies and potentially mortality.
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Lee JH, Kim Y, Mun J, Lee J, Ko S. Effects of hypercarbia on arterial oxygenation during one-lung ventilation: prospective randomized crossover study. Korean J Anesthesiol 2020; 73:534-541. [PMID: 32460465 PMCID: PMC7714622 DOI: 10.4097/kja.19445] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 05/27/2020] [Indexed: 11/12/2022] Open
Abstract
Background This study aimed to evaluate the effects of hypercarbia on arterial oxygenation during one-lung ventilation (OLV). Methods Fifty adult patients undergoing elective video-assisted thoracoscopic lobectomy or pneumonectomy were enrolled. Group I patients (n = 25) were first maintained at normocarbia (PaCO2: 38–42 mmHg) for 30 min and then at hypercarbia (45–50 mmHg). In Group II patients (n = 25), PaCO2 was maintained in the reverse order. Arterial oxygen partial pressure (PaO2), respiratory variables, hemodynamic variables, and hemoglobin concentration were compared during normocarbia and hypercarbia. Arterial O2 content and O2 delivery were calculated. Results PaO2 values during normocarbia and hypercarbia were 66.5 ± 10.6 and 79.7 ± 17.3 mmHg, respectively (mean difference: 13.2 mmHg, 95% CI for difference of means: 17.0 to 9.3, P < 0.001). SaO2 values during normocarbia and hypercarbia were 92.5 ± 4.8% and 94.3 ± 3.1% (P = 0.009), respectively. Static compliance of the lung (33.0 ± 5.4 vs. 30.4 ± 5.3 ml/cmH2O, P < 0.001), arterial O2 content (15.4 ± 1.4 vs. 14.9 ± 1.5 ml/dl, P < 0.001) and O2 delivery (69.9 ± 18.4 vs. 65.1 ± 18.1 ml/min, P < 0.001) were significantly higher during hypercarbia than during normocarbia. Conclusions Hypercarbia increases PaO2 and O2 carrying capacity and improves pulmonary mechanics during OLV, suggesting that it may help manage oxygenation during OLV. Therefore, permissive hypercarbia may be a simple and valuable modality to manage arterial oxygenation during OLV.
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Affiliation(s)
- Jun Ho Lee
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea
| | - Yesull Kim
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea
| | - Juhan Mun
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea
| | - Joseph Lee
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea
| | - Seonghoon Ko
- Department of Anesthesiology and Pain Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea
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18
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The Organ-Protective Effect of Higher Partial Pressure of Arterial Carbon Dioxide in the Normal Range for Infant Patients Undergoing Ventricular Septal Defect Repair. Pediatr Cardiol 2020; 41:372-381. [PMID: 31844927 DOI: 10.1007/s00246-019-02269-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 12/07/2019] [Indexed: 10/25/2022]
Abstract
Hypercapnia has been reported to play an active role in protection against organ injury. The aim of this study was to determine whether a higher level of partial pressure of arterial carbon dioxide (PaCO2) within the normal range in pediatric patients undergoing cardiac surgery had a similar organ-protective effect. From May 2017 to May 2018, 83 consecutive infant patients undergoing ventricular septal defect (VSD) repair with cardiopulmonary bypass were retrospectively enrolled. We recorded the end-expiratory tidal partial pressure of carbon dioxide (Pet-CO2) as an indirect and continuous way to reflect the PaCO2. The patients were divided into a low PaCO2 group (LPG; 30 mmHg < Pet-CO2 < 40 mmHg) and a high PaCO2 group (HPG; 40 mmHg < Pet-CO2 < 50 mmHg). The regional cerebral oxygen saturation (rScO2), cerebral blood flow velocity (CBFV), and hemodynamics at five time points throughout the operation, and perioperative data were recorded and analyzed for the two groups. In total, 34 LPG and 49 HPG patients were included. Demographics and perioperative clinical data showed no significant difference between the groups. Compared with LPG, the HPG produced lower postoperative creatine kinase isoenzyme-MB (40.88 versus 50.34 ng/mL, P = 0.038). The postoperative C-reactive protein of HPG trended lower than in LPG (61.09 versus 73.4 mg/L, P = 0.056). The rScO2 and mean CBFV of HPG were significantly higher compared with LPG (P < 0.05) except at the end of cardiopulmonary bypass. Hemodynamic data showed no significant difference between the groups. As a convenient and safe approach, higher-normal PaCO2 could attenuate brain injury, heart injury, and inflammatory response in infant patients undergoing VSD repair.
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19
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Barnes T, Parhar K, Zochios V. Hypercapnia vs normocapnia in patients with acute respiratory distress syndrome. Br J Hosp Med (Lond) 2019; 79:118. [PMID: 29431490 DOI: 10.12968/hmed.2018.79.2.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tavish Barnes
- Fellow in Intensive Care Medicine, Department of Critical Care Medicine, University of Calgary, Calgary, Canada
| | - Ken Parhar
- Clinical Assistant Professor, Consultant Intensive Care Medicine, Department of Critical Care Medicine, University of Calgary, Calgary, Canada
| | - Vasileios Zochios
- Specialty Registrar and NIHR Academic Fellow in Intensive Care Medicine, Department of Critical Care Medicine, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital, University of Birmingham, Birmingham B15 2TH
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Morales-Quinteros L, Camprubí-Rimblas M, Bringué J, Bos LD, Schultz MJ, Artigas A. The role of hypercapnia in acute respiratory failure. Intensive Care Med Exp 2019; 7:39. [PMID: 31346806 PMCID: PMC6658637 DOI: 10.1186/s40635-019-0239-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 03/07/2019] [Indexed: 12/16/2022] Open
Abstract
The biological effects and physiological consequences of hypercapnia are increasingly understood. The literature on hypercapnia is confusing, and at times contradictory. On the one hand, it may have protective effects through attenuation of pulmonary inflammation and oxidative stress. On the other hand, it may also have deleterious effects through inhibition of alveolar wound repair, reabsorption of alveolar fluid, and alveolar cell proliferation. Besides, hypercapnia has meaningful effects on lung physiology such as airway resistance, lung oxygenation, diaphragm function, and pulmonary vascular tree. In acute respiratory distress syndrome, lung-protective ventilation strategies using low tidal volume and low airway pressure are strongly advocated as these have strong potential to improve outcome. These strategies may come at a price of hypercapnia and hypercapnic acidosis. One approach is to accept it (permissive hypercapnia); another approach is to treat it through extracorporeal means. At present, it remains uncertain what the best approach is.
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Affiliation(s)
- Luis Morales-Quinteros
- Intensive Care Unit, Hospital Universitario Sagrado Corazón, Carrer de Viladomat, 288, 08029, Barcelona, Spain.
| | - Marta Camprubí-Rimblas
- Department of Medicine, Universitat Autònoma de Barcelona, Bellatera, Spain.,Institut d'Investigació i Innovació Parc Taulí (I3PT), Sabadell, Spain
| | - Josep Bringué
- Department of Medicine, Universitat Autònoma de Barcelona, Bellatera, Spain.,Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain
| | - Lieuwe D Bos
- Department of Intensive Care, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.,Respiratory Medicine, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.,Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Marcus J Schultz
- Department of Intensive Care, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.,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), Mahidol University, Bangkok, Thailand
| | - Antonio Artigas
- Intensive Care Unit, Hospital Universitario Sagrado Corazón, Carrer de Viladomat, 288, 08029, Barcelona, Spain.,Department of Medicine, Universitat Autònoma de Barcelona, Bellatera, Spain.,Critical Care Center, Corporació Sanitària I Universitària Parc Taulí, Sabadell, Spain.,Institut d'Investigació i Innovació Parc Taulí (I3PT), Sabadell, Spain.,Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain
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21
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Kubat Ö, Gökçek E, Kaydu A. An Analysis of Patients Followed Up in the Intensive Care Unit with the Diagnosis of Acute Respiratory Distress Syndrome. Turk J Anaesthesiol Reanim 2019; 47:62-68. [PMID: 31276113 DOI: 10.5152/tjar.2018.27122] [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] [Received: 12/06/2017] [Accepted: 07/03/2018] [Indexed: 01/11/2023] Open
Abstract
Objective To examine the factors thought to have an effect on the mortality of patients with acute respiratory distress syndrome (ARDS) in the intensive care unit (ICU). Methods A retrospective evaluation of 100 patients diagnosed with ARDS in the ICU between January 2009 and January 2013 was made. Surviving and deceased patients were compared with respect to the effect of the general characteristics, aetiological and prognostic factors, mechanical ventilation (MV) applications (especially permissive hypercapnia resulting from the restriction of the tidal volume predicted to avoid excessive distention of the alveoli), laboratory test values, multiorgan dysfunction rates, Acute Physiologic Assessment and Chronic Health Evaluation II score, Lung Injury Score, Glasgow Coma Score, Sequential Organ Failure Assessment scores, arterial blood gas parameters and partial pressure of arterial oxygen/fraction of inspired oxygen ratio values on mortality. Results There were 100 patients with ARDS comprising 61 males and 39 females with a mean age of 57.0±13.0 (range: 20-82) years and length of stay in the ICU of 38.7±13 days. The aetiological causes of ARDS were determined as pneumonia in 37 patients, trauma (traffic accidents inside or outside the vehicle and other accidents) in 14, sepsis in 19, pulmonary contusion in 9, non-pulmonary infection in 6, intoxication in 5, multiple blood transfusions in 4, firearms injury in 4 and acute pancreatitis in 2. Forty-four patients died. Conclusion Survival rates were increased in patients with ARDS with early diagnosis and ICU support, lung protective MV strategy and permissive hypercapnia.
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Affiliation(s)
- Ömer Kubat
- Department of Anaesthesiology and Reanimation, Diyarbakır State Hospital, Diyarbakır, Turkey
| | - Erhan Gökçek
- Department of Anaesthesiology and Reanimation, Diyarbakır State Hospital, Diyarbakır, Turkey
| | - Ayhan Kaydu
- Department of Anaesthesiology and Reanimation, Diyarbakır State Hospital, Diyarbakır, Turkey
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22
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Nadeem RN, Elhoufi AM, Soliman MA, Bon I, Obaida ZA, Hussien MM, Salama L, Elsousi AN, Kamat S, Satti RM, Elahi N, Abuhijleh RH, ElZeiny MG, Fargaly H, Ibrahim MM. Clinical Predictors of Adherence to Low Tidal Volume Ventilation Practice: Is it Different on Weekend and Night Shifts? Cureus 2019; 11:e4844. [PMID: 31410327 PMCID: PMC6684108 DOI: 10.7759/cureus.4844] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Low tidal volume ventilation (LTVV) strategy improves outcomes; however, despite recommended by guidelines, adherence to this practice is not high. Methods: Tidal volume for mechanically ventilated patients were recorded for each 12-hour shift, day and night shifts for consecutive 101 patients. Adherence was determined by comparing these tidal volumes to standard low tidal volumes of 6 ml/kg of ideal body weight. Adherence rates were calculated and adherence rates of daytime shifts were compared to those of night time shifts. Adherence rates for weekday shifts were compared with those of weekend shifts. Clinical variables were recorded to analyze predictors of adherence pattern. Results: The sample size was 101 patients with 870 patient-ventilator days with 1734 patient ventilator shifts. Shift adherence was only 47.5%. There was no significant difference between day and night shifts or weekday and weekend shifts. Stepwise multiple regression analysis shows that age, gender, body mass index (BMI), and partial pressure of carbon dioxide (PCO2) have significant correlation with adherence to LTVV practice. Conclusion: The study found that adherence to lung protective low tidal volume mechanical ventilation practice is low. Practice adherence is not different over weekend or night shifts. Age, gender, BMI, and PCO2 have significant correlation with adherence to LTVV practice.
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Affiliation(s)
| | | | | | - Islam Bon
- Intensive Care Medicine, Dubai Hospital, Dubai, ARE
| | | | | | | | | | - Sahish Kamat
- Intensive Care Medicine, Dubai Hospital, Dubai, ARE
| | - Rami M Satti
- Intensive Care Medicine, Dubai Hospital, Dubai, ARE
| | - Naheed Elahi
- Intensive Care Medicine, Dubai Hospital, Dubai, ARE
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23
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Lee JY, Onanyan M, Garrison I, White R, Crook M, Alexeyev MF, Kozhukhar N, Pastukh V, Swenson ER, Supuran CT, Stevens T. Extrinsic acidosis suppresses glycolysis and migration while increasing network formation in pulmonary microvascular endothelial cells. Am J Physiol Lung Cell Mol Physiol 2019; 317:L188-L201. [PMID: 31042076 DOI: 10.1152/ajplung.00544.2018] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Acidosis is common among critically ill patients, but current approaches to correct pH do not improve disease outcomes. During systemic acidosis, cells are either passively exposed to extracellular acidosis that other cells have generated (extrinsic acidosis) or they are exposed to acid that they generate and export into the extracellular space (intrinsic acidosis). Although endothelial repair following intrinsic acidosis has been studied, the impact of extrinsic acidosis on migration and angiogenesis is unclear. We hypothesized that extrinsic acidosis inhibits metabolism and migration but promotes capillary-like network formation in pulmonary microvascular endothelial cells (PMVECs). Extrinsic acidosis was modeled by titrating media pH. Two types of intrinsic acidosis were compared, including increasing cellular metabolism by chemically inhibiting carbonic anhydrases (CAs) IX and XII (SLC-0111) and with hypoxia. PMVECs maintained baseline intracellular pH for 24 h with both extrinsic and intrinsic acidosis. Whole cell CA IX protein expression was decreased by extrinsic acidosis but not affected by hypoxia. When extracellular pH was equally acidic, extrinsic acidosis suppressed glycolysis, whereas intrinsic acidosis did not. Extrinsic acidosis suppressed migration, but increased Matrigel network master junction and total segment length. CRISPR-Cas9 CA IX knockout PMVECs revealed an independent role of CA IX in promoting glycolysis, as loss of CA IX alone was accompanied by decreased hexokinase I and pyruvate dehydrogenase E1α expression and decreasing migration. 2-deoxy-d-glucose had no effect on migration but profoundly inhibited network formation and increased N-cadherin expression. Thus, we report that while extrinsic acidosis suppresses endothelial glycolysis and migration, it promotes network formation.
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Affiliation(s)
- Ji Young Lee
- Departments of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama.,Department of Internal Medicine, University of South Alabama, Mobile, Alabama.,Division of Pulmonary and Critical Care Medicine, University of South Alabama, Mobile, Alabama.,Center for Lung Biology, University of South Alabama, Mobile, Alabama.,College of Medicine, University of South Alabama, Mobile, Alabama
| | - Mher Onanyan
- Department of Internal Medicine, University of South Alabama, Mobile, Alabama.,Division of Pulmonary and Critical Care Medicine, University of South Alabama, Mobile, Alabama.,College of Medicine, University of South Alabama, Mobile, Alabama
| | - Ian Garrison
- College of Medicine, University of South Alabama, Mobile, Alabama
| | - Roderica White
- College of Medicine, University of South Alabama, Mobile, Alabama.,Center for Healthy Communities, University of South Alabama, Mobile, Alabama
| | - Maura Crook
- College of Medicine, University of South Alabama, Mobile, Alabama.,Office of Diversity and Inclusion, University of South Alabama, Mobile, Alabama
| | - Mikhail F Alexeyev
- Departments of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama.,Center for Lung Biology, University of South Alabama, Mobile, Alabama.,College of Medicine, University of South Alabama, Mobile, Alabama
| | - Natalya Kozhukhar
- Departments of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama.,Center for Lung Biology, University of South Alabama, Mobile, Alabama.,College of Medicine, University of South Alabama, Mobile, Alabama
| | - Viktoriya Pastukh
- Departments of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama.,Center for Lung Biology, University of South Alabama, Mobile, Alabama.,College of Medicine, University of South Alabama, Mobile, Alabama
| | - Erik R Swenson
- Medical Service, VA Puget Sound Health Care System, University of Washington, Seattle, Washington
| | | | - Troy Stevens
- Departments of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama.,Department of Internal Medicine, University of South Alabama, Mobile, Alabama.,Center for Lung Biology, University of South Alabama, Mobile, Alabama.,College of Medicine, University of South Alabama, Mobile, Alabama
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24
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Vu LH, Kellum JA, Federspiel WJ, Cove ME. Carbon dioxide removal using low bicarbonate dialysis in rodents. Perfusion 2019; 34:578-583. [DOI: 10.1177/0267659119839284] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Extracorporeal carbon dioxide removal may be used to manage hypercapnia, but compared to dialysis, it’s not widely available. A recent in vitro study showed that dialysis with low bicarbonate dialysates removes CO2. Objective: To show that bicarbonate dialysis removes CO2 in an animal model to validate in-vitro findings and quantify the effect on arterial pH. Methods: Male Sprague-Dawley hypercapnic rats were dialyzed with either a conventional dialysate (PrismasolTM) or a bicarbonate-free dialysate (Bicarb0). The effect of dialysis on standard blood gases and electrolytes was measured. Results: Partial pressure of CO2 and bicarbonate concentration in blood decreased significantly after exposure to Bicarb0 compared to PrismasolTM (filter outflow values 12.8 vs 81.1 mmHg; p < 0.01 for CO2 and 3.5 vs 22.0 mmol/L; p < 0.01 for bicarbonate). Total CO2 content of blood was reduced by 459 mL/L during dialysis with Bicarb0 (filter inflow 546 ± 91 vs filter outflow 87 ± 52 mL/L; p < 0.01), but was not significantly reduced with PrismasolTM. Conclusions: Bicarbonate dialysis removes CO2 at rates comparable to existing low-flow ECCO2R.
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Affiliation(s)
- Lien H Vu
- Division of Respiratory Medicine and Critical Care and Department of Medicine, National University of Singapore, Singapore
| | - John A Kellum
- Center for Critical Care Nephrology, Clinical Research Investigation and Systems Modeling of Acute Illness (CRISMA) Center, Department of Critical Care, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - William J Federspiel
- McGowan Institute for Regenerative Medicine, Departments of Bioengineering and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Matthew E Cove
- Division of Respiratory Medicine and Critical Care and Department of Medicine, National University of Singapore, Singapore
- Center for Critical Care Nephrology, Clinical Research Investigation and Systems Modeling of Acute Illness (CRISMA) Center, Department of Critical Care, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
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25
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Fergie N, Todd N, McClements L, McAuley D, O’Kane C, Krasnodembskaya A. Hypercapnic acidosis induces mitochondrial dysfunction and impairs the ability of mesenchymal stem cells to promote distal lung epithelial repair. FASEB J 2019; 33:5585-5598. [PMID: 30649987 PMCID: PMC6436662 DOI: 10.1096/fj.201802056r] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 01/02/2019] [Indexed: 01/27/2023]
Abstract
Acute respiratory distress syndrome (ARDS) is a devastating disorder characterized by diffuse inflammation and edema formation. The main management strategy, low tidal volume ventilation, can be associated with the development of hypercapnic acidosis (HCA). Mesenchymal stem cells (MSCs) are a promising therapeutic candidate currently in early-phase clinical trials. The effects of HCA on the alveolar epithelium and capillary endothelium are not well established. The therapeutic efficacy of MSCs has never been reported in HCA. In the present study, we evaluated the effects of HCA on inflammatory response and reparative potential of the primary human small airway epithelial and lung microvasculature endothelial cells as well as on the capacity of bone marrow-derived MSCs to promote wound healing in vitro. We demonstrate that HCA attenuates the inflammatory response and reparative potential of primary human small airway epithelium and capillary endothelium and induces mitochondrial dysfunction. It was found that MSCs promote lung epithelial wound repair via the transfer of functional mitochondria; however, this proreparative effect of MSCs was lost in the setting of HCA. Therefore, HCA may adversely impact recovery from ARDS at the cellular level, whereas MSCs may not be therapeutically beneficial in patients with ARDS who develop HCA.-Fergie, N., Todd, N., McClements, L., McAuley, D., O'Kane, C., Krasnodembskaya, A. Hypercapnic acidosis induces mitochondrial dysfunction and impairs the ability of mesenchymal stem cells to promote distal lung epithelial repair.
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Affiliation(s)
- Nicola Fergie
- Centre for Experimental Medicine, School of Medicine, Dentistry, and Biomedical Sciences, Queen’s University of Belfast, Belfast, United Kingdom
| | - Naomi Todd
- Centre for Experimental Medicine, School of Medicine, Dentistry, and Biomedical Sciences, Queen’s University of Belfast, Belfast, United Kingdom
| | - Lana McClements
- Centre for Experimental Medicine, School of Medicine, Dentistry, and Biomedical Sciences, Queen’s University of Belfast, Belfast, United Kingdom
| | - Danny McAuley
- Centre for Experimental Medicine, School of Medicine, Dentistry, and Biomedical Sciences, Queen’s University of Belfast, Belfast, United Kingdom
| | - Cecilia O’Kane
- Centre for Experimental Medicine, School of Medicine, Dentistry, and Biomedical Sciences, Queen’s University of Belfast, Belfast, United Kingdom
| | - Anna Krasnodembskaya
- Centre for Experimental Medicine, School of Medicine, Dentistry, and Biomedical Sciences, Queen’s University of Belfast, Belfast, United Kingdom
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26
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27
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Hypercapnia Alters Alveolar Epithelial Repair by a pH-Dependent and Adenylate Cyclase-Mediated Mechanism. Sci Rep 2019; 9:349. [PMID: 30674971 PMCID: PMC6344503 DOI: 10.1038/s41598-018-36951-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 11/23/2018] [Indexed: 12/16/2022] Open
Abstract
Lung cell injury and repair is a hallmark of the acute respiratory distress syndrome (ARDS). Lung protective mechanical ventilation strategies in these patients may lead to hypercapnia (HC). Although HC has been explored in the clinical context of ARDS, its effect upon alveolar epithelial cell (AEC) wounding and repair remains poorly understood. We have previously reported that HC alters the likelihood of AEC repair by a pH-sensitive but otherwise unknown mechanism. Adenylate cyclase (AC) is an attractive candidate as a putative AEC CO2 sensor and effector as it is bicarbonate sensitive and controls key mediators of AEC repair. The effect of HC on AC activity and plasma membrane (PM) wound repair was measured in AEC type 1 exposed to normocapnia (NC, 40 Torr) or HC (80 Torr), ± tromethamine (THAM) or sodium bicarbonate (HCO3) ± AC probes in a micropuncture model of AEC injury relevant to ARDS. Intracellular pH and AC activity were measured and correlated with repair. HC decreased intracellular pH 0.56, cAMP by 37%, and absolute PM repair rate by 26%. Buffering or pharmacologic manipulation of AC reduced or reversed the effects of HC on AC activity (THAM 103%, HCO3 113% of NC cAMP, ns; Forskolin 168%, p < 0.05) and PM repair (THAM 87%, HCO3 108% of NC likelihood to repair, ns; Forskolin 160%, p < 0.01). These findings suggest AC to be a putative AEC CO2 sensor and modulator of AEC repair, and may have implications for future pharmacologic targeting of downstream messengers of the AC-cAMP axis in experimental models of ARDS.
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28
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Silva PL, Rocco PRM. The basics of respiratory mechanics: ventilator-derived parameters. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:376. [PMID: 30460250 DOI: 10.21037/atm.2018.06.06] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Mechanical ventilation is a life-support system used to maintain adequate lung function in patients who are critically ill or undergoing general anesthesia. The benefits and harms of mechanical ventilation depend not only on the operator's setting of the machine (input), but also on their interpretation of ventilator-derived parameters (outputs), which should guide ventilator strategies. Once the inputs-tidal volume (VT), positive end-expiratory pressure (PEEP), respiratory rate (RR), and inspiratory airflow (V')-have been adjusted, the following outputs should be measured: intrinsic PEEP, peak (Ppeak) and plateau (Pplat) pressures, driving pressure (ΔP), transpulmonary pressure (PL), mechanical energy, mechanical power, and intensity. During assisted mechanical ventilation, in addition to these parameters, the pressure generated 100 ms after onset of inspiratory effort (P0.1) and the pressure-time product per minute (PTP/min) should also be evaluated. The aforementioned parameters should be seen as a set of outputs, all of which need to be strictly monitored at bedside in order to develop a personalized, case-by-case approach to mechanical ventilation. Additionally, more clinical research to evaluate the safe thresholds of each parameter in injured and uninjured lungs is required.
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Affiliation(s)
- Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patricia R M Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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29
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Takahashi N, Nakada TA, Oda S. Efficient CO 2 removal using extracorporeal lung and renal assist device. J Artif Organs 2018; 21:427-434. [PMID: 29980955 DOI: 10.1007/s10047-018-1058-x] [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] [Received: 02/16/2018] [Accepted: 06/25/2018] [Indexed: 12/01/2022]
Abstract
We developed a novel system comprising acid infusion, membrane lung, and a continuous renal replacement therapy console for efficient CO2 removal at a low blood flow. To evaluate the new system, we used an ex vivo experimental model using swine blood. A liter of aliquoted blood adjusted to pH 7.25 and pCO2 65 mm Hg was mixed with acid (0, 10, or 20 mL of lactic or hydrochloric acid [1 mol/L]) and was immediately delivered to the system in a single pass. We collected blood samples at each point of the circuit and calculated the amount of CO2 eliminated by the membrane lung. The new system removed 13.2 ± 0.8, 32.0 ± 2.1, and 51.6 ± 3.7 mL/min of CO2 (with 0, 10, and 20 mEq/L of lactic acid) and 21.2 ± 1.2, 27.3 ± 0.3, and 42.0 ± 1.3 mL/min (with 0, 10, and 20 mEq/L of hydrochloric acid), respectively. The levels of lactate and Cl- ions for acid-base equilibrium were restored after continuous hemodiafiltration. Thus, the amount of CO2 eliminated by the membrane lung was 3.9 times higher with lactic acid and 2.0 times higher with hydrochloric acid compared with non-acid controls. In conclusion, this easy-to-setup CO2 removal system was safe, effective, and removed CO2 at a low blood flow.
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Affiliation(s)
- Nozomi Takahashi
- Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo, Chiba, 260-8677, Japan
| | - Taka-Aki Nakada
- Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo, Chiba, 260-8677, Japan.
| | - Shigeto Oda
- Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo, Chiba, 260-8677, Japan
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30
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Regunath H, Moulton N, Woolery D, Alnijoumi M, Whitacre T, Collins J. Ultra-protective mechanical ventilation without extra-corporeal carbon dioxide removal for acute respiratory distress syndrome. J Intensive Care Soc 2018; 20:40-45. [PMID: 30792761 DOI: 10.1177/1751143718774712] [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: 11/17/2022] Open
Abstract
Background Tidal hyperinflation can still occur with mechanical ventilation using low tidal volume (LVT) (6 mL/kg predicted body weight (PBW)) in acute respiratory distress syndrome (ARDS), despite a well-demonstrated reduction in mortality. Methods Retrospective chart review from August 2012 to October 2014. Inclusion: Age >18years, PaO2/FiO2<200 with bilateral pulmonary infiltrates, absent heart failure, and ultra-protective mechanical ventilation (UPMV) defined as tidal volume (VT) <6 mL/kg PBW. Exclusion: UPMV use for <24 h. Demographics, admission Acute Physiology and Chronic Health Evaluation II (APACHE II) scores, arterial blood gas, serum bicarbonate, ventilator parameters for pre-, during, and post-UPMV periods including modes, VT, peak inspiratory pressure (PIP), plateau pressure (Pplat), driving pressure, etc. were gathered. We compared lab and ventilator data for pre-, during, and post-UPMV periods. Results Fifteen patients (male:female = 7:8, age 42.13 ± 11.29 years) satisfied criteria, APACHEII 20.6 ± 7.1, mean days in intensive care unit and hospitalization were 18.5 ± 8.85 and 20.81 ± 9.78 days, 9 (60%) received paralysis and 7 (46.67%) required inotropes. Eleven patients had echocardiogram, 7 (63.64%) demonstrated right ventricular volume or pressure overload. Eleven patients (73.33%) survived. During-UPMV, VT ranged 2-5 mL/kg PBW(3.99 ± 0.73), the arterial partial pressure of carbon dioxide (PaCO2) was higher than pre-UPMV values (84.81 ± 18.95 cmH2O vs. 69.16 ± 33.09 cmH2O), but pH was comparable and none received extracorporeal carbon dioxide removal (ECCO2-R). The positive end-expiratory pressure (14.18 ± 7.56 vs. 12.31 ± 6.84 cmH2O), PIP (38.21 ± 12.89 vs. 32.59 ± 9.88), and mean airway pressures (19.98 ± 7.61 vs. 17.48 ± 6.7 cm H2O) were higher during UPMV, but Pplat and PaO2/FiO2 were comparable during- and pre-UPMV. Driving pressure was observed to be higher in those who died than who survived (24.18 ± 12.36 vs. 13.42 ± 3.25). Conclusion UPMV alone may be a safe alternative option for ARDS patients in centers without ECCO2-R.
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Affiliation(s)
- Hariharan Regunath
- Department of Medicine, Division of Pulmonary, Critical Care and Environmental Medicine, University of Missouri, Columbia, MO, USA.,Department of Medicine, Division of Infectious Diseases, University of Missouri, Columbia, MO, USA
| | - Nathanial Moulton
- Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - Daniel Woolery
- Department of Medicine, Division of Pulmonary, Critical Care and Environmental Medicine, University of Missouri, Columbia, MO, USA
| | - Mohammed Alnijoumi
- Department of Medicine, Division of Pulmonary, Critical Care and Environmental Medicine, University of Missouri, Columbia, MO, USA
| | - Troy Whitacre
- Respiratory Therapy Services, University of Missouri Hospital and Clinics, Columbia, MO, USA
| | - Jonathan Collins
- Department of Medicine, Division of Pulmonary, Critical Care and Environmental Medicine, University of Missouri, Columbia, MO, USA.,Department of Medicine, Division of Infectious Diseases, University of Missouri, Columbia, MO, USA
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Simonis FD, Barbas CSV, Artigas-Raventós A, Canet J, Determann RM, Anstey J, Hedenstierna G, Hemmes SNT, Hermans G, Hiesmayr M, Hollmann MW, Jaber S, Martin-Loeches I, Mills GH, Pearse RM, Putensen C, Schmid W, Severgnini P, Smith R, Treschan TA, Tschernko EM, Vidal Melo MF, Wrigge H, de Abreu MG, Pelosi P, Schultz MJ, Neto AS. Potentially modifiable respiratory variables contributing to outcome in ICU patients without ARDS: a secondary analysis of PRoVENT. Ann Intensive Care 2018; 8:39. [PMID: 29564726 PMCID: PMC5862714 DOI: 10.1186/s13613-018-0385-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 03/12/2018] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The majority of critically ill patients do not suffer from acute respiratory distress syndrome (ARDS). To improve the treatment of these patients, we aimed to identify potentially modifiable factors associated with outcome of these patients. METHODS The PRoVENT was an international, multicenter, prospective cohort study of consecutive patients under invasive mechanical ventilatory support. A predefined secondary analysis was to examine factors associated with mortality. The primary endpoint was all-cause in-hospital mortality. RESULTS 935 Patients were included. In-hospital mortality was 21%. Compared to patients who died, patients who survived had a lower risk of ARDS according to the 'Lung Injury Prediction Score' and received lower maximum airway pressure (Pmax), driving pressure (ΔP), positive end-expiratory pressure, and FiO2 levels. Tidal volume size was similar between the groups. Higher Pmax was a potentially modifiable ventilatory variable associated with in-hospital mortality in multivariable analyses. ΔP was not independently associated with in-hospital mortality, but reliable values for ΔP were available for 343 patients only. Non-modifiable factors associated with in-hospital mortality were older age, presence of immunosuppression, higher non-pulmonary sequential organ failure assessment scores, lower pulse oximetry readings, higher heart rates, and functional dependence. CONCLUSIONS Higher Pmax was independently associated with higher in-hospital mortality in mechanically ventilated critically ill patients under mechanical ventilatory support for reasons other than ARDS. Trial Registration ClinicalTrials.gov (NCT01868321).
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Affiliation(s)
- Fabienne D Simonis
- Department of Intensive Care and Lab. of Experimental Intensive Care and Anesthesiology (L E I C A), Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | - Carmen S V Barbas
- Department of Intensive Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil.,Department of Pulmonology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Antonio Artigas-Raventós
- Department of Intensive Care Medicine and CIBER de Enfermedades Respiratorias, Hospital de Sabadell, Corporació Sanitaria I Universitària Parc Taulí, Sabadell, Spain
| | - Jaume Canet
- Department of Anesthesiology, Hospital Universitari Germans Trias I Pujol, Barcelona, Spain
| | | | - James Anstey
- Department of Intensive Care, St Vincent's Hospital, Melbourne, Australia
| | | | - Sabrine N T Hemmes
- Department of Anesthesiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Greet Hermans
- Medical Intensive Care Unit, Division of General Internal Medicine, University Hospital Leuven, Louvain, Belgium.,Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Louvain, Belgium
| | - Michael Hiesmayr
- Division of Cardiac, Thoracic, and Vascular Anesthesia and Intensive Care, Medical University Vienna, Vienna, Austria
| | - Markus W Hollmann
- Department of Anesthesiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Samir Jaber
- Department of Critical Care Medicine and Anesthesiology (SAR B), Saint Eloi University Hospital, Montpellier, France
| | - Ignacio Martin-Loeches
- Department of Clinical Medicine, Trinity Centre for Health Sciences, Multidisciplinary Intensive Care Research Organization (MICRO), Welcome Trust, HRB Clinical Research, St James's University Hospital Dublin, Dublin, Ireland.,Irish Centre for Vascular Biology, Irish Centre for Vascular Biology (ICVB), Dublin, Ireland
| | - Gary H Mills
- Department of Anaesthesia and Critical Care Medicine, Sheffield Teaching Hospital, Sheffield, UK
| | - Rupert M Pearse
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Christian Putensen
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Werner Schmid
- Division of Cardiac, Thoracic, and Vascular Anesthesia and Intensive Care, Medical University Vienna, Vienna, Austria
| | - Paolo Severgnini
- Department of Biotechnologies and Sciences of Life, Insubria University, Varese, Italy
| | - Roger Smith
- Department of Intensive Care, St Vincent's Hospital, Melbourne, Australia
| | - Tanja A Treschan
- Department of Anaesthesiology, Düsseldorf University Hospital, Düsseldorf, Germany
| | - Edda M Tschernko
- Division of Cardiac, Thoracic, and Vascular Anesthesia and Intensive Care, Medical University Vienna, Vienna, Austria
| | - Marcos F Vidal Melo
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA
| | - Hermann Wrigge
- Department of Anesthesiology and Intensive Care Medicine, University of Leipzig, Leipzig, Germany
| | - Marcelo Gama de Abreu
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Dresden, Germany.,Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Dresden, Germany
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, Ospedale Policlinico per la Oncologia, IRCCS per l'Oncologia, University of Genoa, Genoa, Italy
| | - Marcus J Schultz
- Department of Intensive Care and Lab. of Experimental Intensive Care and Anesthesiology (L E I C A), Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.,Mahidol Oxford Research Unit (MORU), Mahidol University, Bangkok, Thailand
| | - Ary Serpa Neto
- Department of Intensive Care and Lab. of Experimental Intensive Care and Anesthesiology (L E I C A), Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.,Department of Intensive Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil
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Meleiro H, Correia I, Charco Mora P. New evidence in one-lung ventilation. REVISTA ESPANOLA DE ANESTESIOLOGIA Y REANIMACION 2018; 65:149-153. [PMID: 28967439 DOI: 10.1016/j.redar.2017.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 06/15/2017] [Accepted: 06/29/2017] [Indexed: 06/07/2023]
Abstract
Mechanical ventilation in thoracic surgery has undergone significant changes in recent years due to the implementation of the protective ventilation. This review will analyze recent ventilatory strategies in one-lung ventilation. A MEDLINE research was performed using Mesh term "One-Lung Ventilation" including randomized clinical trials, metanalysis, reviews and systematic reviews published in the last 6 years. Search was performed on 21st March 2017. A total of 75 articles were initially found. After title and abstract review 14 articles were included. Protective ventilation is not simply synonymous of low tidal volume ventilation, but it also includes routine use of PEEP and alveolar recruitment maneuver. New techniques are still in discussion namely PEEP adjustment, ratio inspiration:expiration, ideal type of anesthesia during one-lung ventilation and hypercapnic ventilation.
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Affiliation(s)
- H Meleiro
- Serviço de Anestesiologia, Centro Hospitalar de São João, Porto, Portugal.
| | - I Correia
- Serviço de Anestesiologia, Centro Hospitalar de São João, Porto, Portugal
| | - P Charco Mora
- Servicio de Anestesiología, Reanimación y Tratamiento del Dolor, Hospital Clínico Universitario de Valencia, Valencia, España
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33
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Umari M, Falini S, Segat M, Zuliani M, Crisman M, Comuzzi L, Pagos F, Lovadina S, Lucangelo U. Anesthesia and fast-track in video-assisted thoracic surgery (VATS): from evidence to practice. J Thorac Dis 2018; 10:S542-S554. [PMID: 29629201 PMCID: PMC5880994 DOI: 10.21037/jtd.2017.12.83] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 12/11/2017] [Indexed: 12/18/2022]
Abstract
In thoracic surgery, the introduction of video-assisted thoracoscopic techniques has allowed the development of fast-track protocols, with shorter hospital lengths of stay and improved outcomes. The perioperative management needs to be optimized accordingly, with the goal of reducing postoperative complications and speeding recovery times. Premedication performed in the operative room should be wisely administered because often linked to late discharge from the post-anesthesia care unit (PACU). Inhalatory anesthesia, when possible, should be preferred based on protective effects on postoperative lung inflammation. Deep neuromuscular blockade should be pursued and carefully monitored, and an appropriate reversal administered before extubation. Management of one-lung ventilation (OLV) needs to be optimized to prevent not only intraoperative hypoxemia but also postoperative acute lung injury (ALI): protective ventilation strategies are therefore to be implemented. Locoregional techniques should be favored over intravenous analgesia: the thoracic epidural, the paravertebral block (PVB), the intercostal nerve block (ICNB), and the serratus anterior plane block (SAPB) are thoroughly reviewed and the most common dosages are reported. Fluid therapy needs to be administered critically, to avoid both overload and cardiovascular compromisation. All these practices are analyzed singularly with the aid of the most recent evidences aimed at the best patient care. Finally, a few notes on some of the latest trends in research are presented, such as non-intubated video-assisted thoracoscopic surgery (VATS) and intravenous lidocaine.
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Affiliation(s)
- Marzia Umari
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
| | - Stefano Falini
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
| | - Matteo Segat
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
| | - Michele Zuliani
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
| | - Marco Crisman
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
| | - Lucia Comuzzi
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
| | - Francesco Pagos
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
| | - Stefano Lovadina
- Department of General and Thoracic Surgery, Cattinara University Hospital, Trieste, Italy
| | - Umberto Lucangelo
- Department of Perioperative Medicine, Intensive Care, and Emergency, Cattinara University Hospital, Trieste, Italy
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Morales Quinteros L, Bringué Roque J, Kaufman D, Artigas Raventós A. Importance of carbon dioxide in the critical patient: Implications at the cellular and clinical levels. Med Intensiva 2018; 43:234-242. [PMID: 29486904 DOI: 10.1016/j.medin.2018.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 01/10/2018] [Accepted: 01/10/2018] [Indexed: 01/22/2023]
Abstract
Important recent insights have emerged regarding the cellular and molecular role of carbon dioxide (CO2) and the effects of hypercapnia. The latter may have beneficial effects in patients with acute lung injury, affording reductions in pulmonary inflammation, lessened oxidative alveolar damage, and the regulation of innate immunity and host defenses by inhibiting the expression of inflammatory cytokines. However, other studies suggest that CO2 can have deleterious effects upon the lung, reducing alveolar wound repair in lung injury, decreasing the rate of reabsorption of alveolar fluid, and inhibiting alveolar cell proliferation. Clearly, hypercapnia has both beneficial and harmful consequences, and it is important to determine the net effect under specific conditions. The purpose of this review is to describe the immunological and physiological effects of carbon dioxide, considering their potential consequences in patients with acute respiratory failure.
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Affiliation(s)
| | | | - David Kaufman
- Division of Pulmonary, Critical Care & Sleep, NYU School of Medicine, New York, NY, Estados Unidos
| | - Antonio Artigas Raventós
- Servicio de Medicina Intensiva, Hospital Universitario Sagrat Cor, Barcelona, España; Universidad Autónoma de Barcelona, Sabadell, Barcelona, España; Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, España
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35
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Liu J, Wang W, Liu F, Li Z. Pediatric acute respiratory distress syndrome - current views. Exp Ther Med 2018; 15:1775-1780. [PMID: 29434764 PMCID: PMC5776650 DOI: 10.3892/etm.2017.5628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 11/29/2017] [Indexed: 12/18/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) mainly involves acute respiratory failure. In addition to this affected patients feel progressive arterial hypoxemia, dyspnea, and a marked increase in the work of breathing. The only clinical solution for the above pathological state is ventilation. Mechanical ventilation is necessary to support life in ARDs but it itself worsen lung injury and the term is known clinically as ‘ventilation induced lung injury’ (VILI). At the cellular level, respiratory epithelial cells are subjected to cyclic stretch, i.e. repeated cycles of positive and negative strain, during normal tidal ventilation. In aerated areas of diseased lungs, or even normal lungs subjected to injurious positive pressure mechanical ventilation, the cells are at risk of being over distended, and worsening injury by disrupting the alveolar epithelial barrier. Further, hypercapnic acidosis (HCA) in itself confers protection from stretch injury, potentially via a mechanisms involving inhibition of nuclear factor κB (NF-κB), a transcription factor central to inflammation, injury and repair. Mesenchymal stem cells are the latest in the field and are being investigated as a possible therapy for ARDS.
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Affiliation(s)
- Jinfeng Liu
- Department of Neonatology, Xuzhou Chlidren's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Wei Wang
- Department of Neonatology, Xuzhou Chlidren's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Fengli Liu
- Department of Neonatology, Xuzhou Chlidren's Hospital, Xuzhou, Jiangsu 221002, P.R. China
| | - Zhenguang Li
- Department of Neonatology, Xuzhou Chlidren's Hospital, Xuzhou, Jiangsu 221002, P.R. China
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36
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Nin N, Angulo M, Briva A. Effects of hypercapnia in acute respiratory distress syndrome. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:37. [PMID: 29430454 PMCID: PMC5799147 DOI: 10.21037/atm.2018.01.09] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 01/11/2018] [Indexed: 01/11/2023]
Abstract
In patients with acute respiratory distress syndrome (ARDS) hypercapnia is a marker of poor prognosis, however there is controversial information regarding the effect of hypercapnia on outcomes. Recently two studies in a large population of mechanical ventilation patients showed higher mortality associated independently to hypercapnia. Key roles responsible for the poor clinical outcomes observed in critically ill patients exposed to hypercapnia are not well known, two possible mechanisms involved are the effect of CO2 on the muscle and the alveolar epithelium. Hypercapnia frequently coexists with muscle atrophy and dysfunction, moreover patients surviving ARDS present reduced muscle strength and decreased physical quality of life. One of the possible mechanisms responsible for these abnormalities could be the effects of hypercapnia during the course of ARDS. More over controversy persists about the hypercapnia role in the alveolar space, in the last years there is abundant experimental information on its deleterious effects on essential functions of the alveolar epithelium.
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Affiliation(s)
- Nicolás Nin
- Unidad de Cuidados Intensivos, Hospital Español, Montevideo, Uruguay
| | - Martín Angulo
- Unidad de Cuidados Intensivos, Hospital de Clínicas, Montevideo, Uruguay
| | - Arturo Briva
- Unidad de Cuidados Intensivos, Hospital Español, Montevideo, Uruguay
- Unidad de Cuidados Intensivos, Hospital de Clínicas, Montevideo, Uruguay
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37
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Abstract
OBJECTIVES Extracorporeal life support can lead to rapid reversal of hypoxemia and shock; however, it can also result in varying degrees of hyperoxia. Recent data have suggested an association between hyperoxia and mortality; however, this conclusion has not been consistent across the literature. We evaluated the association between oxygenation thresholds and mortality in three cohorts of extracorporeal life support patients. DESIGN We performed a retrospective cohort study using the Extracorporeal Life Support Organization Registry. SETTING We evaluated the relationship between oxygenation measured 24 hours after extracorporeal membrane oxygenation onset and mortality (2010-2015). PATIENTS The extracorporeal life support cohorts were as follows: 1) veno-venous extracorporeal membrane oxygenation for respiratory failure, 2) veno-arterial extracorporeal membrane oxygenation for cardiogenic shock, and 3) extracorporeal cardiopulmonary resuscitation. INTERVENTIONS The relationships between hypoxemia (PaO2 < 60mm Hg), normoxia (PaO2 60-100mm Hg), moderate hyperoxia (PaO2 101-300mm Hg), extreme hyperoxia (PaO2 > 300 mm Hg), and mortality were evaluated across three extracorporeal life support cohorts. MEASUREMENTS AND MAIN RESULTS Seven hundred sixty-five patients underwent veno-venous extracorporeal membrane oxygenation, 775 patients underwent veno-arterial extracorporeal membrane oxygenation, and 412 underwent extracorporeal cardiopulmonary resuscitation. During veno-venous extracorporeal membrane oxygenation, hypoxemia (odds ratio, 1.68; 95% CI, 1.09-2.57) and moderate hyperoxia (odds ratio, 1.66; 95% CI, 1.11-2.50) were associated with increased mortality compared with normoxia. There was no association between oxygenation and mortality for veno-arterial extracorporeal membrane oxygenation. Moderate hyperoxia was associated with increased mortality during extracorporeal cardiopulmonary resuscitation compared with normoxia (odds ratio, 1.77; 95% CI, 1.03-3.30). An exploratory analysis did not find more specific PaO2 thresholds associated with mortality within moderate hyperoxia. CONCLUSIONS Moderate hyperoxia was associated with increased mortality in patients undergoing veno-venous extracorporeal membrane oxygenation for respiratory failure and extracorporeal cardiopulmonary resuscitation. Hypoxemia was associated with an increased mortality in veno-venous extracorporeal membrane oxygenation. No association was seen between oxygenation and mortality in veno-arterial extracorporeal membrane oxygenation which may be due to early death driven by the underlying disease.
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38
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Barnes T, Zochios V, Parhar K. Re-examining Permissive Hypercapnia in ARDS: A Narrative Review. Chest 2017; 154:185-195. [PMID: 29175086 DOI: 10.1016/j.chest.2017.11.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 10/20/2017] [Accepted: 11/13/2017] [Indexed: 12/16/2022] Open
Abstract
Lung-protective ventilation (LPV) has become the cornerstone of management in patients with ARDS. A subset of patients is unable to tolerate LPV without significant CO2 elevation. In these patients, permissive hypercapnia is used. Although thought to be benign, it is becoming increasingly evident that elevated CO2 levels have significant physiological effects. In this narrative review, we highlight clinically relevant end-organ effects in both animal models and clinical studies. We also explore the association between elevated CO2, acute cor pulmonale, and ICU mortality. We conclude with a brief review of alternative therapies for CO2 management currently under investigation in patients with moderate to severe ARDS.
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Affiliation(s)
- Tavish Barnes
- Department of Critical Care Medicine, University of Calgary, Calgary, AB, Canada
| | - Vasileios Zochios
- Department of Critical Care Medicine, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital, College of Medical and Dental Sciences, University of Birmingham, Birmingham, England
| | - Ken Parhar
- Department of Critical Care Medicine, University of Calgary, Calgary, AB, Canada.
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Radermacher P, Maggiore SM, Mercat A. FiftyYears ofResearch inARDS.Gas Exchange in Acute Respiratory Distress Syndrome. Am J Respir Crit Care Med 2017; 196:964-984. [DOI: 10.1164/rccm.201610-2156so] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Peter Radermacher
- Institute of Anaesthesiological Pathophysiology and Process Engineering, University Medical School, Ulm, Germany
| | - Salvatore Maurizio Maggiore
- Section of Anesthesia, Analgesia, Perioperative, and Intensive Care, Department of Medical, Oral, and Biotechnological Sciences, School of Medicine and Health Sciences, “SS. Annunziata” Hospital, “Gabriele d’Annunzio” University of Chieti-Pescara, Chieti, Italy; and
| | - Alain Mercat
- Department of Medical Intensive Care and Hyperbaric Medicine, Angers University Hospital, Angers, France
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40
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A Climate Change in Mechanical Ventilation?*. Crit Care Med 2017. [DOI: 10.1097/ccm.0000000000002398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Fuchs H, Rossmann N, Schmid MB, Hoenig M, Thome U, Mayer B, Klotz D, Hummler HD. Permissive hypercapnia for severe acute respiratory distress syndrome in immunocompromised children: A single center experience. PLoS One 2017. [PMID: 28632754 PMCID: PMC5478142 DOI: 10.1371/journal.pone.0179974] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Controlled hypoventilation while accepting hypercapnia has been advocated to reduce ventilator-induced lung injury. The aim of the study was to analyze outcomes of a cohort of immunocompromised children with acute respiratory distress syndrome (ARDS) ventilated with a strategy of stepwise increasing PCO2 targets up to 140 mm Hg. METHODS Retrospective analysis of outcomes of a cohort of children with oncologic disease or after stem cell transplantation and severe respiratory failure in comparison with a historical control cohort. RESULTS Out of 150 episodes of admission to the PICU 88 children underwent invasive mechanical ventilation for >24h (overall survival 75%). In a subgroup of 38 children with high ventilator requirements the PCO2 target ranges were increased stepwise. Fifteen children survived and were discharged from the PICU. Severe pulmonary hypertension was seen in two patients and no case of cerebral edema was observed. Long term outcome was available in 15 patients and 10 of these patients survived without adverse neurological sequelae. With introduction of this strategy survival of immunocompromised children undergoing mechanical ventilation for >24h increased to 48% compared to 32% prior to introduction (historical cohort). CONCLUSIONS A ventilation strategy incorporating very high carbon dioxide levels to allow for low tidal volumes and limited inspiratory pressures is feasible in children. Even severe hypercapnia may be well tolerated. No severe side effects associated with hypercapnia were observed. This strategy could potentially increase survival in immunocompromised children with severe ARDS.
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Affiliation(s)
- Hans Fuchs
- Center for Pediatrics, Department of Neonatology and Pediatric Intensive Care, Medical Center – Albert Ludwig University of Freiburg, Faculty of Medicine, Freiburg, Germany
- * E-mail:
| | - Nicola Rossmann
- Division of Neonatology and Pediatric Critical Care, Department for Pediatrics and Adolescent Medicine, Ulm University, Ulm, Germany
| | - Manuel B. Schmid
- Department of Neonatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Manfred Hoenig
- Oncology and stem cell transplantation, Department for Pediatrics and Adolescent Medicine, Ulm University, Ulm, Germany
| | - Ulrich Thome
- Division of Neonatology, University Hospital of Leipzig, Leipzig, Germany
| | - Benjamin Mayer
- Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
| | - Daniel Klotz
- Center for Pediatrics, Department of Neonatology and Pediatric Intensive Care, Medical Center – Albert Ludwig University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Helmut D. Hummler
- Division of Neonatology and Pediatric Critical Care, Department for Pediatrics and Adolescent Medicine, Ulm University, Ulm, Germany
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Keeley JA, Kim DY. Modifiable risk factors and the role of driving pressure in acute respiratory distress syndrome. J Thorac Dis 2017; 9:E487-E488. [PMID: 28616317 DOI: 10.21037/jtd.2017.03.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jessica A Keeley
- Department of General Surgery, Harbor UCLA Medical Center, Torrance, CA, USA
| | - Dennis Y Kim
- Department of General Surgery, Harbor UCLA Medical Center, Torrance, CA, USA
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Romano TG, Correia MDT, Mendes PV, Zampieri FG, Maciel AT, Park M. Metabolic acid-base adaptation triggered by acute persistent hypercapnia in mechanically ventilated patients with acute respiratory distress syndrome. Rev Bras Ter Intensiva 2017; 28:19-26. [PMID: 27096672 PMCID: PMC4828087 DOI: 10.5935/0103-507x.20160009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Accepted: 01/22/2016] [Indexed: 01/23/2023] Open
Abstract
Objective Hypercapnia resulting from protective ventilation in acute respiratory
distress syndrome triggers metabolic pH compensation, which is not entirely
characterized. We aimed to describe this metabolic compensation. Methods The data were retrieved from a prospective collected database. Variables
from patients' admission and from hypercapnia installation until the third
day after installation were gathered. Forty-one patients with acute
respiratory distress syndrome were analyzed, including twenty-six with
persistent hypercapnia (PaCO2 > 50mmHg > 24 hours) and 15
non-hypercapnic (control group). An acid-base quantitative physicochemical
approach was used for the analysis. Results The mean ages in the hypercapnic and control groups were 48 ± 18
years and 44 ± 14 years, respectively. After the induction of
hypercapnia, pH markedly decreased and gradually improved in the ensuing 72
hours, consistent with increases in the standard base excess. The metabolic
acid-base adaptation occurred because of decreases in the serum lactate and
strong ion gap and increases in the inorganic apparent strong ion
difference. Furthermore, the elevation in the inorganic apparent strong ion
difference occurred due to slight increases in serum sodium, magnesium,
potassium and calcium. Serum chloride did not decrease for up to 72 hours
after the initiation of hypercapnia. Conclusion In this explanatory study, the results indicate that metabolic acid-base
adaptation, which is triggered by acute persistent hypercapnia in patients
with acute respiratory distress syndrome, is complex. Furthermore, further
rapid increases in the standard base excess of hypercapnic patients involve
decreases in serum lactate and unmeasured anions and increases in the
inorganic apparent strong ion difference by means of slight increases in
serum sodium, magnesium, calcium, and potassium. Serum chloride is not
reduced.
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Affiliation(s)
- Thiago Gomes Romano
- Departamento de Nefrologia, Faculdade de Medicina do ABC, Santo André, SP, Brazil
| | - Mario Diego Teles Correia
- Unidade de Terapia Intensiva, Disciplina de Emergências Clínicas, Hospital das Clinicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | | | - Fernando Godinho Zampieri
- Unidade de Terapia Intensiva, Disciplina de Emergências Clínicas, Hospital das Clinicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | | | - Marcelo Park
- Unidade de Terapia Intensiva, Disciplina de Emergências Clínicas, Hospital das Clinicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
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44
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Severe hypercapnia and outcome of mechanically ventilated patients with moderate or severe acute respiratory distress syndrome. Intensive Care Med 2017; 43:200-208. [PMID: 28108768 DOI: 10.1007/s00134-016-4611-1] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 10/25/2016] [Indexed: 12/11/2022]
Abstract
PURPOSE To analyze the relationship between hypercapnia developing within the first 48 h after the start of mechanical ventilation and outcome in patients with acute respiratory distress syndrome (ARDS). PATIENTS AND METHODS We performed a secondary analysis of three prospective non-interventional cohort studies focusing on ARDS patients from 927 intensive care units (ICUs) in 40 countries. These patients received mechanical ventilation for more than 12 h during 1-month periods in 1998, 2004, and 2010. We used multivariable logistic regression and a propensity score analysis to examine the association between hypercapnia and ICU mortality. MAIN OUTCOMES We included 1899 patients with ARDS in this study. The relationship between maximum PaCO2 in the first 48 h and mortality suggests higher mortality at or above PaCO2 of ≥50 mmHg. Patients with severe hypercapnia (PaCO2 ≥50 mmHg) had higher complication rates, more organ failures, and worse outcomes. After adjusting for age, SAPS II score, respiratory rate, positive end-expiratory pressure, PaO2/FiO2 ratio, driving pressure, pressure/volume limitation strategy (PLS), corrected minute ventilation, and presence of acidosis, severe hypercapnia was associated with increased risk of ICU mortality [odds ratio (OR) 1.93, 95% confidence interval (CI) 1.32 to 2.81; p = 0.001]. In patients with severe hypercapnia matched for all other variables, ventilation with PLS was associated with higher ICU mortality (OR 1.58, CI 95% 1.04-2.41; p = 0.032). CONCLUSIONS Severe hypercapnia appears to be independently associated with higher ICU mortality in patients with ARDS. TRIAL REGISTRATION Clinicaltrials.gov identifier, NCT01093482.
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Dony P, Dramaix M, Boogaerts JG. Hypocapnia measured by end-tidal carbon dioxide tension during anesthesia is associated with increased 30-day mortality rate. J Clin Anesth 2016; 36:123-126. [PMID: 28183549 DOI: 10.1016/j.jclinane.2016.10.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 09/28/2016] [Accepted: 10/28/2016] [Indexed: 02/06/2023]
Abstract
STUDY OBJECTIVE To evaluate the relationship between intraoperative end-tidal carbon dioxide (etco2) values and clinical outcomes with special attention on 30-day postoperative mortality and secondarily on hospital length of stay (LOS). DESIGN Retrospective, observational study. SETTING Surgical theaters of the University Hospital Center of Charleroi. PATIENTS Five thousand three hundred seventeen patients ASA I-IV undergoing various surgical procedures (except pediatric and cardiac surgery) under general anesthesia. INTERVENTIONS No intervention on the patients. MEASUREMENTS The mean etco2 level measured during anesthesia was secondarily extracted from an electronic information management system. Patients were divided into 2 separate groups based on etco2 values less than or greater than or equal to 35 mm Hg. The primary end point was the in- and outhospital mortality in the 30-day period after surgery. The second was the LOS more than 6 days. MAIN RESULTS Hypocapnia occurred in 66% of the patients. Mortality rate at 30-day was 84 of 3554 (2.4%) in the low etco2 group vs 15 of 1763 (0.9%) in the other (odds ratio, 2.99 [1.69-5.28]; P<.001). In multivariate analysis, age and ASA scores had significant independent associations with mortality rate. Adjusting for these factors had an effect on the relative odds ratio of etco2 on mortality of 1.99 ([1.11-3.56]; P<.001). Patients with low etco2 experienced higher LOS (14.1±9.4 vs 13.1±8.9 days; P<.001). Thirty five percent of the patients in the low etco2 group were still hospitalized more than 6 days compared with 30% in the other (P<.001). CONCLUSION Low etco2 level during anesthesia is associated with an increase in postoperative mortality rate and LOS. These results emphasize the importance of preventing hypocapnia during anesthesia to improve surgical outcomes.
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Affiliation(s)
- Philippe Dony
- Department of Anesthesiology, University Hospital Center of Charleroi, Belgium
| | - Michele Dramaix
- School of Public Health, Research Center for Epidemiology, Free University of Brussels, 1070 Brussels, Belgium
| | - Jean G Boogaerts
- Department of Anesthesiology, University Hospital Center of Charleroi, Belgium.
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Abstract
Acute respiratory distress syndrome presents as hypoxia and bilateral pulmonary infiltrates on chest imaging in the absence of heart failure sufficient to account for this clinical state. Management is largely supportive, and is focused on protective mechanical ventilation and the avoidance of fluid overload. Patients with severe hypoxaemia can be managed with early short-term use of neuromuscular blockade, prone position ventilation, or extracorporeal membrane oxygenation. The use of inhaled nitric oxide is rarely indicated and both β2 agonists and late corticosteroids should be avoided. Mortality remains at approximately 30%.
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Affiliation(s)
- Rob Mac Sweeney
- Regional Intensive Care Unit, Royal Victoria Hospital, Belfast, Northern Ireland, UK
| | - Daniel F McAuley
- Regional Intensive Care Unit, Royal Victoria Hospital, Belfast, Northern Ireland, UK; Wellcome-Wolfson Institute for Experimental Medicine, Queen's University of Belfast, Belfast, Northern Ireland, UK.
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Potentially modifiable factors contributing to outcome from acute respiratory distress syndrome: the LUNG SAFE study. Intensive Care Med 2016; 42:1865-1876. [DOI: 10.1007/s00134-016-4571-5] [Citation(s) in RCA: 191] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/22/2016] [Indexed: 11/24/2022]
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Sen A, Callisen HE, Alwardt CM, Larson JS, Lowell AA, Libricz SL, Tarwade P, Patel BM, Ramakrishna H. Adult venovenous extracorporeal membrane oxygenation for severe respiratory failure: Current status and future perspectives. Ann Card Anaesth 2016; 19:97-111. [PMID: 26750681 PMCID: PMC4900379 DOI: 10.4103/0971-9784.173027] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Extracorporeal membrane oxygenation (ECMO) for severe acute respiratory failure was proposed more than 40 years ago. Despite the publication of the ARDSNet study and adoption of lung protective ventilation, the mortality for acute respiratory failure due to acute respiratory distress syndrome has continued to remain high. This technology has evolved over the past couple of decades and has been noted to be safe and successful, especially during the worldwide H1N1 influenza pandemic with good survival rates. The primary indications for ECMO in acute respiratory failure include severe refractory hypoxemic and hypercarbic respiratory failure in spite of maximum lung protective ventilatory support. Various triage criteria have been described and published. Contraindications exist when application of ECMO may be futile or technically impossible. Knowledge and appreciation of the circuit, cannulae, and the physiology of gas exchange with ECMO are necessary to ensure lung rest, efficiency of oxygenation, and ventilation as well as troubleshooting problems. Anticoagulation is a major concern with ECMO, and the evidence is evolving with respect to diagnostic testing and use of anticoagulants. Clinical management of the patient includes comprehensive critical care addressing sedation and neurologic issues, ensuring lung recruitment, diuresis, early enteral nutrition, treatment and surveillance of infections, and multisystem organ support. Newer technology that delinks oxygenation and ventilation by extracorporeal carbon dioxide removal may lead to ultra-lung protective ventilation, avoidance of endotracheal intubation in some situations, and ambulatory therapies as a bridge to lung transplantation. Risks, complications, and long-term outcomes and resources need to be considered and weighed in before widespread application. Ethical challenges are a reality and a multidisciplinary approach that should be adopted for every case in consideration.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Harish Ramakrishna
- Department of Anesthesiology, Division of Cardiovascular and Thoracic Anesthesiology, Mayo Clinic, Arizona, USA
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Abstract
This article reviews aspects of mechanical ventilation in patients without lung injury, patients in the perioperative period, and those with neurologic injury or disease including spinal cord injury. Specific emphasis is placed on ventilator strategies, including timing and indications for tracheostomy. Lung protective ventilation, using low tidal volumes and modest levels of positive end-expiratory pressure, should be the default consideration in all patients requiring mechanical ventilatory support. The exception may be the patient with high cervical spinal cord injuries who requires mechanical ventilatory support. There is no consensus on the timing of tracheostomy in patients with neurologic diseases.
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The Goldilocks Principle, Carbon Dioxide, and Acute Respiratory Distress Syndrome: Too Much, Too Little, or Just Right? Anesthesiology 2016; 124:532-4. [PMID: 26709573 DOI: 10.1097/aln.0000000000000996] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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