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ASA PS Classification
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Definition
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Examples, including, but not limited to:
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ASA I
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A normal healthy patient
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Healthy, non-smoking, no or minimal alcohol use
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ASA II
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A patient with mild systemic disease
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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 DM/HTN, mild lung disease
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ASA III
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A patient with severe systemic disease
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Substantive functional limitations; One or more moderate to severe diseases. Examples include (but not limited to): poorly controlled DM or HTN, COPD, morbid obesity (BMI ≥40), active hepatitis, alcohol dependence or abuse, implanted pacemaker, moderate reduction of ejection fraction, ESRD undergoing regularly scheduled dialysis, premature infant PCA < 60 weeks, history (>3 months) of MI, CVA, TIA, or CAD/stents.
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ASA IV
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A patient with severe systemic disease that is a constant threat to life
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Examples include (but not limited to): recent ( < 3 months) MI, CVA, TIA, or CAD/stents, ongoing cardiac ischemia or severe valve dysfunction, severe reduction of ejection fraction, sepsis, DIC, ARD or ESRD not undergoing regularly scheduled dialysis
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ASA V
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A moribund patient who is not expected to survive without the operation
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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
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ASA VI
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A declared brain-dead patient whose organs are being removed for donor purposes
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