| 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 (BMI 30 - 40), well-controlled Diabetes Mellitus/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 Diabetes Mellitus/Hypertension, COPD, morbid obesity (BMI > 40), active hepatitis, alcohol dependence or abuse, implanted pacemaker, moderate reduction of ejection fraction, End-Stage Renal Disease (ESRD) undergoing regularly scheduled dialysis, history (>3 months) of Myocardial infarction, Cerebrovascular accidents |
| ASA IV |
A patient with severe systemic disease that is a constant threat to life |
Examples include (but not limited to): recent (< 3 months) of Myocardial infarction, Cerebrovascular accidents, ongoing cardiac ischaemia or severe valve dysfunction, severe reduction of 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, intra-cranial bleed with mass effect, ischaemic 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 |
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