ICU scoring systemsSAPS II

• Has a similar role to APACHE II, but more widely utilised in mainland Europe, the Simplified Acute Physiology Score (SAPS) was devised by LeGall et al in 1984 (SAPS I) and modified by the same group in 1993 (SAPS II). A SAPS III score is in development.

• As for APACHE II, burns and cardiac surgical patients are excluded from analysis.

• The original version used 14 readily measured clinical and biochemical variables while the updated version, SAPS II, comprises 12 physiology variables, age, type of admission (medical, scheduled or unscheduled surgical) and three underlying disease variables.

• A point score is based on the degree and prognostic importance of derangement of these variables in the first 24h following ICU admission. The point scoring was assigned following logistic regression modelling of data obtained from 8369 patients in 137 adult ICUs in both Europe and North America and validated in a further 4628 patients.

• The claimed advantage of this system is that it estimates the risk of death without having to specify a primary diagnosis.

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