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Canadian Journal of Anesthesia, Vol 19, 529-535, Copyright © 1972 by Canadian Anesthesiologists' Society
1 Department of Anaesthesia, McGill Univesity, and The Queen Elizabeth Hospital of Montreal
This study shows that there are two distinct types of muscular hyperactivity which occur during recovery from all types of inhalation anaesthesia. Spasticity which occured in the large majority of patients, seemed to be part of the normal recovery pattern. Shivering on the other hand, occured in fewer than half the Patients and seeemed to be largely related to temperature loss during the operative procedure.
Muscular hyperactivity during recovery from general anaesthesia has been reported by various authors, and has been particulary related to balothane anaesthesia. In order to determine the nature of this phenomenon more than 215 patients were closely observed during emergence from general anaesthesia with various inhalation agents.
It appears that there are two distinct types of muscular hyperactivity. The first, spasticity, occured in the large majortiy of patients and seemed to be part of the normal recovery pattern. The second was shivering which occurred in fewer than half the patients and seemed to be largely related to interoperative heat loss. Both forms of hyperactivity occured with all agents studied.
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