scholarly journals Cardiorespiratory physiological perturbations after acute smoke-induced lung injury and during extracorporeal membrane oxygenation support in sheep

F1000Research ◽  
2020 ◽  
Vol 9 ◽  
pp. 769
Author(s):  
Saul Chemonges
Keyword(s):  
Intensive Care ◽  
Lung Injury ◽  
Life Support ◽  
Extracorporeal Life Support ◽  
Lung Compliance ◽  
Smoke Inhalation ◽  
Biological Information ◽  
Arterial Oxygen ◽  
Physiological Data ◽  
Coronary Perfusion

Background: Numerous successful therapies developed for human medicine involve animal experimentation. Animal studies that are focused solely on translational potential, may not sufficiently document unexpected outcomes. Considerable amounts of data from such studies could be used to advance veterinary science. For example, sheep are increasingly being used as models of intensive care and therefore, data arising from such models must be published. In this study, the hypothesis is that there is little information describing cardiorespiratory physiological data from sheep models of intensive care and the author aimed to analyse such data to provide biological information that is currently not available for sheep that received extracorporeal life support (ECLS) following acute smoke-induced lung injury. Methods: Nineteen mechanically ventilated adult ewes undergoing intensive care during evaluation of a form of ECLS (treatment) for acute lung injury were used to collate clinical observations. Eight sheep were injured by acute smoke inhalation prior to treatment (injured/treated), while another eight were not injured but treated (uninjured/treated). Two sheep were injured but not treated (injured/untreated), while one received room air instead of smoke as the injury and was not treated (placebo/untreated). The data were then analysed for 11 physiological categories and compared between the two treated groups. Results: Compared with the baseline, treatment contributed to and exacerbated the deterioration of pulmonary pathology by reducing lung compliance and the arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2) ratio. The oxygen extraction index changes mirrored those of the PaO2/FiO2 ratio. Decreasing coronary perfusion pressure predicted the severity of cardiopulmonary injury. Conclusions: These novel observations could help in understanding similar pathology such as that which occurs in animal victims of smoke inhalation from house or bush fires, aspiration pneumonia secondary to tick paralysis and in the management of the severe coronavirus disease 2019 (COVID-19) in humans.

scholarly journals Cardiorespiratory physiological perturbations after acute smoke-induced lung injury and during extracorporeal membrane oxygenation support in sheep

2016 ◽  
Author(s):  
Saul Chemonges
Keyword(s):  
Intensive Care ◽  
Lung Injury ◽  
Life Support ◽  
Extracorporeal Life Support ◽  
Lung Compliance ◽  
Smoke Inhalation ◽  
Biological Information ◽  
Arterial Oxygen ◽  
Physiological Data ◽  
Coronary Perfusion

AbstractBackgroundNumerous successful therapies developed for human medicine involve animal experimentation. Animal studies that are focused solely on translational potential, may not sufficiently document unexpected outcomes. Considerable amounts of data from such studies could be used to advance veterinary science. For example, sheep are increasingly being used as models of intensive care and therefore, data arising from such models must be published. In this study, the hypothesis is that there is little information describing cardiorespiratory physiological data from sheep models of intensive care and the author aimed to analyse such data to provide biological information that is currently not available for sheep that received extracorporeal life support (ECLS) following acute smoke-induced lung injury.MethodsNineteen mechanically ventilated adult ewes undergoing intensive care during evaluation of a form of ECLS (treatment) for acute lung injury were used to collate clinical observations. Eight sheep were injured by acute smoke inhalation prior to treatment (injured/treated), while another eight were not injured but treated (uninjured/treated). Two sheep were injured but not treated (injured/untreated), while one received room air instead of smoke as the injury and was not treated (placebo/untreated). The data were then analysed for 11 physiological categories and compared between the two treated groups.ResultsCompared with the baseline, treatment contributed to and exacerbated the deterioration of pulmonary pathology by reducing lung compliance and the arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2) ratio. The oxygen extraction index changes mirrored those of the PaO2/FiO2 ratio. Decreasing coronary perfusion pressure predicted the severity of cardiopulmonary injury.ConclusionsThese novel observations could help in understanding similar pathology such as that which occurs in animal victims of smoke inhalation from house or bush fires, aspiration pneumonia secondary to tick paralysis and in the management of the severe coronavirus disease 2019 (COVID-19) in humans.

scholarly journals Extracorporeal Membrane Oxygenation: The First 10 Years Experience of a Portuguese Pediatric Intensive Care Unit

2021 ◽  
Vol 34 (6) ◽  
pp. 435
Author(s):  
Daniel Meireles ◽  
Francisco Abecasis ◽  
Leonor Boto ◽  
Cristina Camilo ◽  
Miguel Abecasis ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Overall Survival ◽  
Intensive Care ◽  
Pediatric Intensive Care Unit ◽  
Pediatric Patients ◽  
Life Support ◽  
Extracorporeal Life Support ◽  
Pediatric Intensive Care ◽  
Overall Survival Rate ◽  
Clinical Complications

Introduction: In Portugal, extracorporeal membrane oxygenation (ECMO) is used in pediatric patients since 2010. The aim of this study was to describe the clinical characteristics of patients, indications, complications and mortality associated with the use of ECMO during the first 10-years of experience in the Pediatric Intensive Care Unit located in Centro Hospitalar Universitário Lisboa Norte.Material and Methods: Retrospective observational cohort study of all patients supported with ECMO in a Pediatric Intensive Care Unit, from the 1st of May 2010 up to 31st December 2019.Results: Sixty-five patients were included: 37 neonatal (≤ 28 days of age) and 28 pediatric patients (> 28 days). In neonatal cases, congenital diaphragmatic hernia was the main reason for ECMO (40% of neonatal patients and 23% of total). Among pediatric patients, respiratory distress was the leading indication for ECMO (47% of total). The median length of ECMO support was 12 days. Clinical complications were more frequent than mechanical complications (65% vs 35%). Among clinical complications, access site bleeding was the most prevalent with 38% of cases. The overall patient survival was 68% at the time of discharge (65% for neonatal and 71% for pediatric cases), while the overall survival rate in Extracorporeal Life Support Organization registry was 61%. The number of ECMO runs has been increasing since 2011, even though in a non-linear way (three cases in 2010 to 11 cases in 2019).Discussion: In the first 10 years we received patients from all over the country. Despite continuous technological developments, circuitrelated complications have a significant impact. The overall survival rate in the Pediatric Intensive Care Unit was not inferior to the one reported by the Extracorporeal Life Support Organization.Conclusion: The overall survival of our Pediatric Intensive Care Unit is not inferior to one reported by other international centers. Our experience showed the efficacy of the ECMO technique in a Portuguese centre.

scholarly journals Pulmonary microRNA profiling in a mouse model of ventilator-induced lung injury

2012 ◽  
Vol 303 (3) ◽  
pp. L199-L207 ◽  
Author(s):  
Katerina Vaporidi ◽  
Eleni Vergadi ◽  
Evangelos Kaniaris ◽  
Maria Hatziapostolou ◽  
Eleni Lagoudaki ◽  
...  
Keyword(s):  
Lung Injury ◽  
Mirna Expression ◽  
Gene Networks ◽  
Target Genes ◽  
Statistical Significance ◽  
Mirna Gene ◽  
Lung Compliance ◽  
Negative Control ◽  
Arterial Oxygen ◽  
Micro Rnas

The aim of this study was to investigate the changes induced by high tidal volume ventilation (HVTV) in pulmonary expression of micro-RNAs (miRNAs) and identify potential target genes and corresponding miRNA-gene networks. Using a real-time RT-PCR-based array in RNA samples from lungs of mice subjected to HVTV for 1 or 4 h and control mice, we identified 65 miRNAs whose expression changed more than twofold upon HVTV. An inflammatory and a TGF-β-signaling miRNA-gene network were identified by in silico pathway analysis being at highest statistical significance ( P = 10−43 and P = 10−28, respectively). In the inflammatory network, IL-6 and SOCS-1, regulated by miRNAs let-7 and miR-155, respectively, appeared as central nodes. In TGF-β-signaling network, SMAD-4, regulated by miR-146, appeared as a central node. The contribution of miRNAs to the development of lung injury was evaluated in mice subjected to HVTV treated with a precursor or antagonist of miR-21, a miRNA highly upregulated by HVTV. Lung compliance was preserved only in mice treated with anti-miR-21 but not in mice treated with pre-miR-21 or negative-control miRNA. Both alveolar-arterial oxygen difference and protein levels in bronchoalveolar lavage were lower in mice treated with anti-miR-21 than in mice treated with pre-miR-21 or negative-control miRNA (DA-a: 66 ± 27 vs. 131 ± 22, 144 ± 10 mmHg, respectively, P < 0.001; protein concentration: 1.1 ± 0.2 vs. 2.3 ± 1, 2.1 ± 0.4 mg/ml, respectively, P < 0.01). Our results show that HVTV induces changes in miRNA expression in mouse lungs. Modulation of miRNA expression can affect the development of HVTV-induced lung injury.

Alveolar-arterial oxygen gradients before extracorporeal life support for severe pediatric respiratory failure

1994 ◽  
Vol 22 (4) ◽  
pp. 620-625 ◽  
Author(s):  
FRANK W. MOLER ◽  
JOHN M. PALMISANO ◽  
JOSEPH R. CUSTER ◽  
JON N. MELIONES ◽  
ROBERT H. BARTLETT
Keyword(s):  
Respiratory Failure ◽  
Life Support ◽  
Extracorporeal Life Support ◽  
Arterial Oxygen ◽  
Oxygen Gradients

scholarly journals The Role of Extracorporeal Membrane Oxygenation on Acute Respiratory Distress Syndrome

2021 ◽  
Vol 5 (10) ◽  
pp. 953-960
Author(s):  
Dini Ardiyani ◽  
Zen Ahmad
Keyword(s):  
Acute Respiratory Distress Syndrome ◽  
Lung Injury ◽  
Extracorporeal Membrane Oxygenation ◽  
Respiratory Distress Syndrome ◽  
Respiratory Distress ◽  
Distress Syndrome ◽  
Life Support ◽  
Extracorporeal Life Support ◽  
Lung Protective Ventilation ◽  
Membrane Oxygenation

Acute lung injury and acute respiratory distress syndrome are characterized by rapid-onset respiratory failure following a variety of direct and indirect insults to the parenchyma or vasculature of the lungs. Extracorporeal membrane oxygenation is a form of extracorporeal life support where an external artificial circulator carries venous blood from the patient to a gas exchange device (oxygenator) where blood becomes enriched with oxygen and has carbon dioxide removed. This blood then re-enters the patients circulation. The potential advantages of ECMO over conventional manajement may extend beyond its role in supporting patients with ARDS. ECMO may facilitate and enhance the application of lung-protective ventilation by minimizing ventilator-induced lung injury.

scholarly journals Extracorporeal Life Support for Massive Hemoptysis and Acute Lung Injury Due to ANCA Negative Vasculitis

2021 ◽  
Vol 7 (1) ◽  
Keyword(s):  
Acute Lung Injury ◽  
Lung Injury ◽  
Extracorporeal Membrane Oxygenation ◽  
Respiratory Distress ◽  
Life Support ◽  
Extracorporeal Life Support ◽  
Rescue Therapy ◽  
Massive Hemoptysis ◽  
Life Threatening

Massive hemoptysis is life-threatening and extracorporeal membrane oxygenation (ECMO) may be indicated as rescue therapy due to acute lung injury in this setting. We report a case of a patient who presented with massive hemoptysis and acute lung injury after reported inhaled ground oxymorphone abuse. Although initially thought to have been due to inhaled oxymorphone, we determined that the patient had ANCA-negative vasculitis that led to both hemoptysis and hematuria. The role of inhaled oxymorphone in combination with the vasculitis is unknown. ECMO was initiated to support the patient and, although his course was complicated, he did recover. Keywords: ECMO; Vasculitis; Acute Respiratory Distress (ARDS).

A case of vaping-induced acute respiratory distress syndrome requiring extracorporeal life support

Perfusion ◽  
2020 ◽  
pp. 026765912092563
Author(s):  
Sudhir Krishnan ◽  
Guramrinder Singh Thind ◽  
Mona Soliman ◽  
Leslie Tolle ◽  
Eduardo Mireles-Cabodevila ◽  
...  
Keyword(s):  
Acute Respiratory Distress Syndrome ◽  
Lung Injury ◽  
Respiratory Distress Syndrome ◽  
Respiratory Distress ◽  
Distress Syndrome ◽  
Life Support ◽  
Extracorporeal Life Support ◽  
The United States ◽  
Product Use

Introduction: An upsurge of e-cigarette, or vaping, product use–associated lung injury has been reported in the United States. The potential role of extracorporeal life support in e-cigarette, or vaping, product use–associated lung injury merits consideration. Case report: We present a case of vaping-induced severe acute respiratory distress syndrome that was salvaged with extracorporeal life support and had excellent recovery. Discussion: The mechanistic reasons for the sudden outbreak of e-cigarette, or vaping, product use–associated lung injury are under active investigation. A predominantly diffuse, bilateral pattern of lung injury has been reported, with some cases meeting the criteria for severe acute respiratory distress syndrome. To date, 68 deaths from e-cigarette, or vaping, product use–associated lung injury have been confirmed by the centers of disease control. However, resolution of lung injury has been reported in most cases, thereby justifying candidacy for extracorporeal life support, if required. Conclusion: Extracorporeal life support can be successfully utilized as a bridge to recovery in vaping-induced severe acute respiratory distress syndrome.

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