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Clinical Chemistry 24: 1762-1766, 1978;
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Clinical Chemistry, Vol 24, 1762-1766, Copyright © 1978 by American Association for Clinical Chemistry

Is serum cholinesterase activity a predictor of succinyl choline sensitivity? An assessment of four methods

RT Evans and J Wroe

Four methods for measuring serum cholinesterase activity have been applied to sera of normal individuals and of patients shown to be sensitive to short-acting muscle relaxants of the succinyldicholine type. They have been assessed according to their ability to differentiate between sensitive and insensitive individuals on the basis of enzyme activity measurements alone. The method described, based upon that of Dietz et al. [Clin. Chem. 19, 1309 (1973)], in which propionylthiocholine is used as substrate, is best for this purpose, being capable of identifying over 90% of affected individuals with no false positives. Acetylcholine and butyrylthiocholine are slightly inferior substrates in this respect, and benzoylcholine gives little useful information.




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Copyright © 1978 by the American Association for Clinical Chemistry.