American Society of Anesthesiologists (ASA) Score

American Society of Anesthesiologists (ASA) Score is a global score that assesses the physical status of patients before surgery.

It is sometimed refereed to as ASA-PS, because it is a measure of ‘physical status’.

ASA 1 A normal healthy patient.
ASA 2 A patient with mild systemic disease.
ASA 3 A patient with severe systemic disease.
ASA 4 A patient with severe systemic disease that is a constant threat to life.
ASA 5 A moribund patient who is not expected to survive

There are modifications – the addition of “E” for an emergency, the addition of  “P” for pregnancy, and ASA 6 for organ retrieval in brain-dead patients.

The ASA Score is a useful global measure of health.

Reference

Owens WD, Felts JA, Spitznagel EL Jr. ASA physical status classifications: a study of consistency of ratings. Anesthesiology 1978; 49: 239-43.

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