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APACHE II score explanation and clinical context APACHE II is a severity scoring system developed to estimate risk of hospital mortality for patients admitted to intensive care. The score is the sum of an acute physiology score derived from the worst value in the first 24 hours for twelve physiologic variables plus points for age plus points for chronic health status. A higher total score indicates greater physiologi
APACHE IV calculation note APACHE IV is a validated severity scoring system published for hospital mortality assessment in critically ill adults. The original model uses many physiologic variables combined with spline terms and coefficients derived from a very large multicenter dataset. Reproducing the exact predicted mortality requires the original model coefficients or authorized software. This tool collects the da
Explanation and Clinical Context The Berlin Criteria provides a standardized method to diagnose acute respiratory distress syndrome based on the degree of hypoxemia, the requirement of positive end expiratory pressure, and the presence of bilateral opacities not fully explained by cardiac failure. The PaO2 FiO2 ratio defines the severity group. A ratio of three hundred or less with mandatory positive end expiratory p