Diaphragm-protective mechanical ventilation in acute respiratory failure

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  • Itagaki Taiga
    Department of Emergency and Disaster Medicine, Tokushima University Hospital
  • Oto Jun
    Department of Emergency and Critical Care Medicine, Tokushima University Graduate School of Biomedical Sciences

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Other Title
  • 急性呼吸不全における横隔膜保護的人工呼吸戦略

Description

<p>Mechanical ventilation injures not only the lungs but also the diaphragm resulting in dysfunction associated with poor outcomes. The chief mechanisms of ventilator-induced diaphragm dysfunction are: disuse atrophy due to insufficient contraction and excessive ventilatory support; concentric load-induced injury due to excessive contraction and insufficient ventilatory support; eccentric load-induced injury due to contraction during the expiratory phase; and longitudinal atrophy caused by sudden decrease in high positive end-expiratory pressure. To protect the diaphragm during mechanical ventilation, maintaining proper levels of diaphragm contraction is paramount; thus, monitoring of respiratory effort, finely tuned ventilator settings, and maintaining of synchronization between the patient and the ventilator are necessary. As diaphragm dysfunction is more likely to occur in critically ill patients, diaphragm-protective mechanical ventilation strategies are essential to reduce the mortality rate of intensive care unit patients. This review outlines basic knowledge of diaphragm, clinical evidence of ventilator-induced diaphragm dysfunction and its underlying mechanisms, and strategies to facilitate diaphragm-protective mechanical ventilation.</p>

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