ICU disease severity score and mortality risk prediction.
Vital signs & Labs
Neurological & Medical Hist.
pts
Scoring & Mortality
APACHE II Score5Points
Hospital Mortality8%Estimated
Note: This is a simplified estimator. A full APACHE II calculation requires the most extreme value for all 12 physiological parameters within 24 hours.
About this calculator
Overview
APACHE II (Acute Physiology and Chronic Health Evaluation II) is a clinical scoring system specifically designed for intensive care unit (ICU) patients. It uses 12 physiological variables, age, and chronic health status to estimate a patient's risk of hospital mortality.
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Pro Tips
Use the 'worst' value recorded in the first 24 hours (most abnormal).
GCS points are calculated as (15 - patient's actual GCS).
Chronic health points (5 for non-operative/emergency, 2 for elective surgery) apply to severe organ failure or immunocompromised states.
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Fun Facts
"Score ranges from 0 to 71; higher scores correlate with higher mortality."
"Calculated within the first 24 hours of admission to the ICU."
"A-a gradient is used instead of PaO2 if FiO2 ≥ 0.5."
"AKI (Acute Kidney Injury) doubles the points assigned for serum creatinine."
Formula: Total Score = Acute Physiology Score + Age Points + Chronic Health Points.
