The American journal of the medical sciences
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Am. J. Med. Sci.
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The arterial to end-tidal carbon dioxide gradient (P [a-Et] CO2) reveals the ventilation-perfusion (V/Q) status of critically ill patients. V/Q mismatch has several causes and affects the clinical outcomes of critically ill patients. We investigated the relationship between P (a-Et) CO2 and the clinical outcomes in critically ill patients. ⋯ P (a-Et) CO2 is a simple, easily accessible indicator that potentially impacts patient care and outcomes as an independent marker for assessing disease severity and predicting mortality, especially in non-respiratory critical care scenarios.