ASA classification

Introduction

American Society of Anesthesiologists (ASA) classification

class 1: normal healthy patient
class 2: mild systemic disease, no functional limitations
class 3: moderate systemic disease, plus functional limitation
class 4: severe systemic disease that is a constant threat to life; functionally incapacitating
class 5: moribund; not expected to live 24 hours
class 6: brain dead; organs to be harvested

ASA classification & perioperative mortality

% mortality by age & class

age	class 1	class 2	class 3	class 4	class 5
1-30	6	8	22	28	36
31-50	2	11	25	37	25
51-70	1	8	29	39	23
> 70	0	5	25	45	25

age	class 1	class 2	class 3	class 4	class 5
1-30	6	8	22	28	36
31-50	2	11	25	37	25
51-70	1	8	29	39	23
> 70	0	5	25	45	25

Additional terms

• American Society of Anesthesiologists (ASA)