Which does not cause malignant hypehermia
Correct Answer: N2O
Description: Malignant hypehermia (MH) is a rare (1:15,000 in pediatric patients and 1:40,000 in adult patients) genetic hypermetabolic muscle disease, the characteristic phenotypical signs and symptoms of which most commonly appear with exposure to inhaled general anesthetics or succinylcholine (triggering agents). MH may occasionally present more than an hour after emergence from an anesthetic, and rarely may occur without exposure to known triggering agents. Most cases have been repoed in young males; almost none have been repoed in infants, and few have been repoed in the elderly. Neveheless, all ages and both sexes may be affected. The incidence of MH varies significantly from country to country and even among different geographic localities within the same country, reflecting varying gene pools. The upper Midwest appears to have the greatest incidence of MH in the United States. Anesthetic drugs that trigger MH include ether, halothane, enflurane, isoflurane, desflurane, sevoflurane, and depolarizing muscle relaxants, succinylcholine being the only anesthetic drug currently used. Desflurane and sevoflurane appear to be less potent triggers than halothane and produce a more gradual onset of MH. The onset may be explosive if succinylcholine is used. Ref: Miller's anesthesia 8th edition Ref: Morgan & Mikhail's clinical anesthesiology 6e
Category:
Anaesthesia
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