SAPS II (Simplified Acute Physiology Score II)
Simplified Acute Physiology Score II (Le Gall 1993): age, heart rate, SBP, temperature, oxygenation (if ventilated), urine output, BUN, sodium, potassium, bicarbonate, bilirubin, WBC, GCS, chronic disease,…
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 70 years
- Heart rate
- 130 bpm
- Systolic BP
- 90 mmHg
- Temperature
- 38 C
- Mechanically ventilated or CPAP
- Yes
- PaO2
- 80 mmHg
- FiO2
- 0.5
- Urine output
- 0.4 L/day
- BUN
- 60 mg/dL
- Sodium
- 140 mEq/L
The other 7 values
- Potassium
- 4.0 mEq/L
- Bicarbonate
- 18 mEq/L
- Bilirubin
- 2.0 mg/dL
- WBC
- 15 x10^3/mm^3
- Glasgow Coma Scale
- 12
- Chronic disease
- None (0)
- Type of admission
- Medical (6)
Result: SAPS II 64 points: predicted hospital mortality 75.3%.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Score
- 17 variables banded to fixed points; total drives mortality via logit = -7.7631 + 0.0737*SAPS + 0.9971*ln(SAPS+1).
- Use
- an ICU admission severity model; companion to apache2. BUN entered in mg/dL, bilirubin in mg/dL. A benchmarking estimate, not an individual prognosis.
What you enter
- Age
- Heart rate (worst)
- Systolic BP (worst)
- Temperature (highest)
- Mechanically ventilated or CPAP
- PaO2 (if ventilated)
- FiO2 (if ventilated, fraction)
- Urine output
- BUN
- Sodium
The other 7 fields
- Potassium
- Bicarbonate
- Bilirubin
- WBC
- Glasgow Coma Scale (3-15)
- Chronic disease (none / metastatic / hematologic / AIDS)
- Type of admission
How this is calculated
Le Gall JR, Lemeshow S, Saulnier F. A new Simplified Acute Physiology Score (SAPS II) based on a European/North American multicenter study. JAMA. 1993;270(24):2957-2963. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.