IMPORTANCE:. Prone positioning is associated with improved mortality in patients with moderate/severe acute respiratory distress syndrome (ARDS) and has been increasingly used throughout the COVID-19 pandemic. In patients with refractory hypoxemia. transfer to an extracorporeal membrane oxygenation (ECMO) center may improve outcome but may be challenging due to severely compromised ga... https://foldlyers.shop/product-category/button-cell/