ASA Physical Status Classification
Classifies preoperative physical status into six ASA classes.
When to use
Preoperative assessment of adults to describe physical status and communicate risk to the team.
Pearls and pitfalls
- The ASA class describes physical status and does not estimate procedure specific surgical risk.
- Class 3 includes severe disease that limits activity but does not incapacitate the patient.
- Class 6 is reserved for brain death and organ donation.
- The classification is subjective and should be recorded with the comorbidities that justify it.
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Formula
Choose the ASA class matching preoperative physical status, from 1 to 6.
Evidence
American Society of Anesthesiologists physical status classification system, updated in 2020.
References
- American Society of Anesthesiologists. ASA Physical Status Classification System. 2020. https://www.asahq.org/standards-and-practice-parameters/statement-on-asa-physical-status-classification-system
Frequently asked questions
What is ASA Physical Status Classification?
Classifies preoperative physical status into six ASA classes. Preoperative assessment of adults to describe physical status and communicate risk to the team.
How is the result calculated?
Choose the ASA class matching preoperative physical status, from 1 to 6.
How should the result be interpreted?
American Society of Anesthesiologists physical status classification system, updated in 2020.
What are the sources?
American Society of Anesthesiologists. ASA Physical Status Classification System. 2020.