Simplified Acute Physiology Score II
Estimates severity and hospital mortality in adult intensive care patients.
When to use
Adults admitted to intensive care in the first 24 hours, to stratify severity.
Pearls and pitfalls
- SAPS II uses 12 physiologic variables, age, chronic disease and admission type.
- The score ranges from 0 to 163 and is converted to mortality probability by a logistic equation.
- Use the worst values from the first 24 hours and record ventilation for the oxygenation item.
- The estimate is population based and does not alone decide limitation of support.
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Formula
Add points for age, heart rate, systolic pressure, temperature, oxygenation, urine output, urea, white cells, sodium, potassium, bicarbonate, bilirubin, Glasgow, chronic disease and admission type.
Evidence
Score derived and validated in a European and North American multicenter study to predict hospital mortality in intensive care.
References
- 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. doi:10.1001/jama.270.24.2957
Frequently asked questions
What is Simplified Acute Physiology Score II?
Estimates severity and hospital mortality in adult intensive care patients. Adults admitted to intensive care in the first 24 hours, to stratify severity.
How is the result calculated?
Add points for age, heart rate, systolic pressure, temperature, oxygenation, urine output, urea, white cells, sodium, potassium, bicarbonate, bilirubin, Glasgow, chronic disease and admission type.
How should the result be interpreted?
Score derived and validated in a European and North American multicenter study to predict hospital mortality in intensive care.
What are the sources?
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.