Anesthesiology
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Acute respiratory distress syndrome is characterized by hypoxemia, altered alveolar-capillary permeability, and neutrophil-dominated inflammatory pulmonary edema. Despite decades of research, an effective drug therapy for acute respiratory distress syndrome remains elusive. The ideal pharmacotherapy for acute respiratory distress syndrome should demonstrate antiprotease activity and target injurious inflammatory pathways while maintaining host defense against infection. ⋯ The main function of α1-antitrypsin is as an antiprotease, targeting neutrophil elastase in particular. However, studies have also highlighted the role of α1-antitrypsin in the modulation of inflammation and bacterial clearance. In light of the current SARS-CoV-2 pandemic, the identification of a treatment for acute respiratory distress syndrome is even more pertinent, and α1-antitrypsin has been implicated in the inflammatory response to SARS-CoV-2 infection.
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Observational Study
Changes in Respiratory Muscle Thickness during Mechanical Ventilation.
The lateral abdominal wall muscles are recruited with active expiration, as may occur with high breathing effort, inspiratory muscle weakness, or pulmonary hyperinflation. The effects of critical illness and mechanical ventilation on these muscles are unknown. This study aimed to assess the reproducibility of expiratory muscle (i.e., lateral abdominal wall muscles and rectus abdominis muscle) ultrasound and the impact of tidal volume on expiratory muscle thickness, to evaluate changes in expiratory muscle thickness during mechanical ventilation, and to compare this to changes in diaphragm thickness. ⋯ Thickness measurement of the expiratory muscles by ultrasound has excellent reproducibility. Changes in the thickness of the expiratory muscles occurred in 34% of patients and were unrelated to changes in diaphragm thickness. Increased expiratory muscle thickness resulted from increased thickness of the fasciae.
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Whether supplemental oxygen worsens long-term mortality remains unclear, with contradictory trial results. The authors therefore tested the hypothesis that supplemental oxygen (80% vs. 30%) increases the hazard for long-term mortality. ⋯ In this post hoc analysis of a large, controlled trial, supplemental oxygen did not increase postoperative mortality.
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Physician burnout, widespread across medicine, is linked to poorer physician quality of life and reduced quality of care. Data on prevalence of and risk factors for burnout among anesthesiologists are limited. The objective of the current study was to improve understanding of burnout in anesthesiologists, identify workplace and personal factors associated with burnout among anesthesiologists, and quantify their strength of association. ⋯ The prevalence of burnout among anesthesiologists is high, with workplace factors weighing heavily. The authors identified risk factors for burnout, especially perceived support in the workplace, where focused interventions may be effective in reducing burnout.