Table A1.

ASA Physical Status Classification System.

	Definition	Examples (Including, but Not Limited To)
ASA I	A normal healthy patient	Healthy, non-smoking, no or minimal alcohol use
ASA II	A patient with mild systemic disease	Mild diseases only without substantive functional limitations. Examples include (but not limited to): current smoker, social alcohol drinker, pregnancy, obesity (30 < BMI < 40), well-controlled diabetic disease/hypertension, mild lung disease
ASA III	A patient with severe systemic disease	Substantive functional limitations; one or more moderate to severe diseases. Examples include (but not limited to): poorly controlled diabetic disease or hypertension, chronic obstructive pulmonary disease, morbid obesity (BMI ≥ 40), active hepatitis, alcohol dependence or abuse, implanted pacemaker, moderate reduction in ejection fraction, end-stage renal dysfunction (ESRD) undergoing regularly scheduled dialysis, premature infant post-conceptual age < 60 weeks, history (>3 months) of myocardial infarct (MI), cerebrovascular event (CVA), transient ischemic event (TIA), or coronary artery disease (CAD)/stents.
ASA IV	A patient with severe systemic disease that is a constant threat to life	Examples include (but not limited to): recent (<3 months) MI, CVA, TIA, or CAD/stents, ongoing cardiac ischemia or severe valve dysfunction, severe reduction in ejection fraction, sepsis, DIC, ARD or ESRD not undergoing regularly scheduled dialysis
ASA V	A moribund patient who is not expected to survive without the operation	Examples include (but not limited to): ruptured abdominal/thoracic aneurysm, massive trauma, intracranial bleed with mass effect, ischemic bowel in the face of significant cardiac pathology or multiple organ/system dysfunction
ASA VI	A declared brain-dead patient whose organs are being removed for donor purposes

American Society of Anesthesiologists—ASA Physical Status Classification system [internet]. www.Asahq.org. (accessed on 13 December 2020). Available from: https://www.asahq.org/standards-and-practice-parameters/statement-on-asa-physical-status-classification-system, accessed on 13 July 2024.