ASA Physical Status (PS) Classification System from the American Society of Anesthesiologists | |
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ASA PS Category | Preoperative Health Status |
ASA PS 1 | Normal healthy patient |
ASA PS 2 | Patients with mild systemic disease |
ASA PS 3 | Patients with severe systemic disease |
ASA PS 4 | Patients with severe systemic disease that is a constant threat to life |
ASA PS 5 | Moribund patients who are not expected to survive without the operation |
ASA PS 6 | A declared brain-dead patient who organs are being removed for donor purposes |