Table 3.

American Society of Anesthesiologists Physical Status (ASA PS) Classification¹²³

ASA PS Classification	Definition	Examples
ASA 1	Normal healthy patient	Systemically healthy
ASA 2	Mild systemic disease	Disease process is controlled: obesity, pregnancy, mild lung disease, hypertension
ASA 3	Severe systemic disease	Systemic disease with clinical signs: advanced heart or lung disease, anemia, dystocia, upper airway dysfunction
ASA 4	Systemic disease constant threat to life	Severe uncontrolled disease process: heart failure, dyspnea, septic shock, hemorrhagic shock
ASA 5	Moribund patient not expected to survive without operation	Severe disease or trauma: uncontrolled hemorrhage, advanced septic shock