Table 5. ASA classification of anesthesia risk.

Level 1: Healthy and fit patient, with normal organ functions

Level 2: With mild systemic disease (excluding surgical conditions) and sound functional compensation

Level 3: With severe systemic disease; with functional limitation, but is still able to cope with daily activities

Level 4: With severe systemic disease that is a constant threat to life; loss of ability to perform daily activities

Level 5: Not expected to survive >24 hours with or without surgery

ASA, American Society of Anesthesiologists.