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Table 1 ASA (American Society of Anesthesiologists) grade of physical status

From: A retrospective report (2003–2013) of the complications associated with the use of a one-man (head and tail) rope recovery system in horses following general anaesthesia

Category Physical Status
ASA 1 Normal healthy patient
ASA 2 Patient with mild systemic disease
ASA 3 Patient with severe systemic disease that is not a constant threat to life
ASA 4 Patient with severe systemic disease that is a constant threat to life
ASA 5 Moribund patient not expected to survive with or without surgery