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Table 1 ASA classification

From: Hidden in plain sight: bias towards sick patients when sampling patients with sufficient electronic health record data for research

ASA class

Definition

1

A normal healthy patient

2

A patient with mild systemic disease

3

A patient with severe systemic disease

4

A patient with severe systemic disease that is a constant threat to life

5

A moribund patient who is not expected to survive without the operation

6

A declared brain-dead patient whose organs are being removed for donor purposes

  1. ASA = American Society of Anesthesiologists.
  2. An “E” is appended to the ASA Class for emergency cases.