APACHE II Score Calculator

APACHE II Score Calculator — Critical Care Mortality Prediction

Calculate APACHE II (Acute Physiology And Chronic Health Evaluation) score for ICU patients. Estimate mortality risk based on physiological variables, age, and chronic health conditions.

Step 1: Physiological Parameters

Temperature (°C)

Mean Arterial Pressure (mmHg)

Heart Rate (bpm)

Respiratory Rate (breaths/min)

Oxygenation (PaO₂/FiO₂ or A-aDO₂)

Arterial pH

APACHE II Score Ranges

Each physiological parameter is scored from 0-4 points based on deviation from normal. Maximum physiological score: 60 points.

Step 2: Lab Values & Demographics

Serum Sodium (mEq/L)

Serum Potassium (mEq/L)

Serum Creatinine (mg/dL)

Hematocrit (%)

White Blood Cell Count (×10³/μL)

Glasgow Coma Score (GCS)

Age (years)

Chronic Health Conditions

Score Interpretation

APACHE II score ranges from 0-71. Higher scores indicate greater severity of illness and higher predicted mortality.

APACHE II Score Results

Score Summary

Score Components

Mortality Risk

APACHE II Score

Moderate Risk

Physiological Score

Age Points

Chronic Health

Predicted Mortality

15%

Detailed Score Components

Parameter	Value	Points	Range

Mortality Risk Prediction

APACHE II Formula

APACHE II Score = (Physiological Score) + (Age Points) + (Chronic Health Points)

Predicted mortality is calculated using logistic regression based on the total APACHE II score and diagnostic category weights.

Medical Disclaimer

This APACHE II calculator is for educational and informational purposes only. It should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult with qualified healthcare providers for patient management decisions.

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