American Society of Anaesthesiology Physical Status Classification System (adapted from https://www.asahq.org/resources/clinical-information/asa-physical-status-classification-system)4
| ASA Grade | Definition | Examples |
|---|---|---|
| 1 | Normal healthy patient | Non-smoker, minimal alcohol |
| 2 | Mild systemic disease | Without substantive functional limitation e.g. smoker, pregnancy, well controlled hypertension |
| 3 | Severe systemic disease | Substantive functional limitation or multiple diseases e.g. COPD, morbid obesity, poorly controlled diabetes mellitus |
| 4 | Severe systemic disease with constant threat to life | e.g. recent MI, CVA, sepsis |
| 5 | Moribund patient who will die without operation | e.g. major trauma, ruptured AAA |
| 6 | Declared brain dead patient who's organs are being harvested for donation |