ASA classification (Fitness)
The American Society of Anesthesiologists (ASA) physical status classification system is a system for assessing the fitness of patients before surgery. There are six categories in this classification system. They are:
- Class I: A normal healthy patient.
- Class II: A patient with mild systemic disease.
- Class III: A patient with severe systemic disease.
- Class IV: A patient with severe systemic disease that is a constant threat to life.
- Class V: A moribund (in terminal decline; lacking vitality or vigor) patient who is not expected to survive without the operation.
- Class VI: A declared brain-dead patient whose organs are being removed for donor purposes.
If the surgery is an emergency, the physical status classification is followed by “E” (for emergency) for example “3E”. Class 5 is usually an emergency and is therefore usually "5E". The class "6E" does not exist and is simply recorded as class "6", as all organ retrieval in brain-dead patients is done urgently.