Max Rady College of Medicine

Concept: Acute Physiology Score (APS)

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Concept Description

Last Updated: 2015-06-29



    A component of the APACHE II classification system , the Acute Physiology Score (APS) measures the physiological condition of the critically ill patients in intensive care units. The APACHE II Acute Physiology Score scale ranges from 0, least deranged/severe, to 60, most deranged/ severe and is based on 12 clinical measures (Temperature, Mean Arterial Pressure, Heart Rate, Respiratory Rate, Oxygenation, Arterial ph, Serum Sodium, Serum Potassium, Serum Creatinine, Hematocrit, White Cell Count, and Glasgow Coma Scale) made during the initial 24 hours in the ICU.

APS as a Primary Indicator of the Severity of Acute Illness

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  • Garland A, Fransoo R, Olafson K, Ramsey C, Yogendran M, Chateau D, McGowan K. The Epidemiology and Outcomes of Critical Illness in Manitoba. Winnipeg, MB: Manitoba Centre for Health Policy, 2012. [Report] [Summary] (View)

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Manitoba Centre for Health Policy
Community Health Sciences, Max Rady College of Medicine,
Rady Faculty of Health Sciences,
Room 408-727 McDermot Ave.
University of Manitoba
Winnipeg, MB R3E 3P5 Canada