unfortunately , though , the serum cpk is not a specific test , and in doubtful cases the only unequivocal method of establishing susceptibility to malignant hyperpyrexia is to carry out an in vitro muscle test in which the muscle is exposed to caffeine , halothane , succinylcholine , and potassium chloride .
C0024591
malignant hyperpyrexia
C0038627
succinylcholine