APACHE II Score Calculator

Acute Physiology and Chronic Health Evaluation II

🩺 Patient Information

No Chronic Disease
0 points
Non-operative
Cirrhosis, CHF, COPD, dialysis, immunocompromised (+5 pts)
Post-operative (Emergency)
Same conditions, post-emergency surgery (+5 pts)
Post-operative (Elective)
Same conditions, post-elective surgery (+2 pts)

📊 Acute Physiology (Worst values in first 24h)

0
APACHE II Score
Low Risk
--
Predicted Mortality
--
Physiology Points
--
Age + Chronic

📋 APACHE II Score to Mortality Reference

APACHE II ScoreNon-op MortalityPost-op MortalityRisk Category
0-4~4%~1%Very Low
5-9~8%~3%Low
10-14~15%~7%Moderate
15-19~25%~12%Moderate-High
20-24~40%~25%High
25-29~55%~35%Very High
30-34~75%~55%Extremely High
≥35~85%~70%Critical

ℹ️ About APACHE II

When to Use

  • ICU admission severity assessment
  • Outcome prediction and benchmarking
  • Research and quality improvement
  • Prognostication discussions with families

Limitations

  • Does not predict individual patient outcome
  • Scores may change during ICU stay
  • Less accurate in certain populations (trauma, burns)
  • Newer scores (APACHE III, IV, SOFA) may be more accurate

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Disclaimer: APACHE II is a prognostic tool for population-level assessment, not individual prediction. Scores should supplement, not replace, clinical judgment. Mortality estimates are approximate and vary by patient population and ICU type.