SAPS II Score Calculator

Your details

Patient age in years at ICU admission.
years
Scheduled surgical = elective; unscheduled surgical = emergency surgery.
If more than one condition is present, score only the highest. Metastatic cancer = solid tumor with distant metastases; AIDS = HIV-positive with a complication defining AIDS.
Worst heart rate during the first 24 hours of ICU stay. Cardiac arrest within 24 hours should be scored as <40 bpm (11 pts).
bpm
Worst systolic blood pressure in the first 24 hours.
mmHg
Score 3 points if the patient reached 39 degrees C (102.2 degrees F) or higher at any point in the first 24 hours.
Lowest GCS in the first 24 hours. Use the score before sedation if sedated. Total score 3-15.
Score the PaO2/FiO2 ratio only if the patient is receiving mechanical ventilation or CPAP at any point in the first 24 hours.
Total urine output collected over the first 24 hours in the ICU.
mL/day
Worst BUN value in the first 24 hours.
mg/dL
Worst serum sodium in the first 24 hours.
mEq/L
Worst serum potassium in the first 24 hours.
mEq/L
Worst serum bicarbonate (HCO3) in the first 24 hours.
mEq/L
Worst total bilirubin in the first 24 hours.
mg/dL
Worst WBC count in the first 24 hours.
x10^3/mm^3
SAPS II ScoreLow risk (predicted mortality < 10%)
13

Total SAPS II score (0-163 range)

Predicted in-hospital mortality0%
Age points7
Admission type points6
Chronic disease points0
Heart rate points0
Blood pressure points0
Temperature points0
GCS points0
Oxygenation points0
Urine output points0
BUN/Urea points0
Sodium points0
Potassium points0
Bicarbonate points0
Bilirubin points0
WBC points0
13 pts
Low (< 10% mortality)<29Low-moderate (~10-25%)29-40Moderate (~25-50%)40-52High (~50-75%)52-64Very high (>75%)64+

SAPS II score 13 - predicted in-hospital mortality 1.5%.

  • Admission type is medical. SAPS II was developed on a mixed medical and surgical ICU population.
  • SAPS II predicts population-level mortality risk for groups of patients; individual outcomes depend on many factors not captured in the score.

Next stepUse SAPS II alongside clinical judgment, trends over time, and diagnosis-specific scoring tools such as APACHE II or SOFA for a comprehensive picture.

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