Guedel's signs

Guedel's signs

[go̅o̅′dəlz]
Etymology: Arthur E. Guedel, American anesthesiologist, 1883-1956
a system for describing the stages and planes of anesthesia based on physical signs observed in the patient. These stages are most applicable to inhalation anesthesia and are difficult to delineate when combination or modern anesthetics are given. See also anesthesia.
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Assessing motor response to noxious stimuli, one of the eight Guedel's signs of anaesthetic depth, is also commonly relied upon (1).