The American Society of Anesthesiologist classification
system is used to stratify patients preoperatively by risk.
|
ASA
|
Patient's Health
|
Status of
Under-lying Disease
|
Limitations on
Activities
|
Risk of Death
|
|
I
|
excellent; no systemic disease; excludes persons at
extremes of age
|
none
|
none
|
none
|
|
II
|
disease of one body system
|
well-controlled
|
none
|
none
|
|
III
|
disease of more than one body system or one major system
|
controlled
|
present but not incapacitated
|
no immediate danger
|
|
IV
|
poor with at least 1 severe disease
|
poorly controlled or end stage
|
incapacitated
|
possible
|
|
V
|
very poor, moribund
|
|
incapacitated
|
imminent
|
• ASA I excludes the very young and very old.