Guedel's classification

Guedel's Classification

Guedel's Classification (pronounced: gwee-dell's classification) is a system used in anesthesiology to describe the four stages of anesthesia. It was developed by Arthur Ernest Guedel, an American anesthesiologist, in the early 20th century.

Etymology

The term is named after Arthur Ernest Guedel, who first described the stages of anesthesia in 1937.

Definition

Guedel's Classification is a system that categorizes the physiological response to increasing doses of anesthetic agents. It is divided into four stages:

1. Stage I: Also known as the stage of analgesia or the stage of voluntary excitement. This stage begins with the administration of the anesthetic and ends with the loss of consciousness.
2. Stage II: Also known as the stage of delirium or the stage of involuntary excitement. This stage begins with the loss of consciousness and ends with the loss of eyelash reflex.
3. Stage III: Also known as the stage of surgical anesthesia. This stage begins with the loss of the eyelash reflex and ends with the cessation of respiration.
4. Stage IV: Also known as the stage of medullary paralysis. This stage begins with the cessation of respiration and ends with death.

Related Terms

• Anesthesia
• Analgesia
• Arthur Ernest Guedel
• Eyelash reflex
• Respiration

See Also

• List of medical classifications
• History of anesthesiology

External links

• Medical encyclopedia article on Guedel's classification
• Wikipedia's article - Guedel's classification

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