| | | | | | The Medical Algorithms Project |
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| Chapter : | ch31. Anesthesiology | Section : | Preoperative Patient Classification and Preparation | | American Society of Anesthesiologists Physical Status Classification System | | Copyright (c) 2006-2007, Institute for Algorithmic Medicine, Houston, TX, USA. All rights reserved. |
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Overview :
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 |
where:
• ASA I excludes the very young and very old.
| | References: | |
Camporesi
EM, Greeley WJ, et al. Chapter 9: Anesthesia. pages 148-163 (page 156). IN:
Sabiston DC Jr. Textbook of Surgery, 14th edition. W.B. Saunders Company.
1991.
Owens WD,
Felts JA, Spitznagel EL Jr. ASA physical status classifications: A study of
consistency of ratings. Anesthesiology. 1978; 49: 239-243.
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