JOURNAL ARTICLE
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
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Pathophysiology of hyperkalemia induced by succinylcholine.

Anesthesiology 1975 July
SCh is unequivocally contraindicated in the management of patients who have sustainded thermal trauma or direct muscle trauma and those who have neurologic disorders involving motor deficits, including tetanus. The mechanism is clear in some, but not all, of these conditions, and is related to increased chemosensitivity of the muscle membrane due to the development of receptor sites in extrajunctional areas. Though SCh induces a small release of K+ in normal muscle, it produces a potentially lethal efflux in the presence of increased sensitivity. This K+-releasing action of SCh begins about 5 to 15 days after injury and persists for 2 to 3 months in patients who have sustained burns or trauma, and perhaps 3 to 6 months in patients with upper motor neuron lesions.

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