Abstract
With chymopapain at a concentration of 10 mg/ml, the authors skin tested 540 chemonucleolysis candidates; six were positive, and 534 were negative. None of the positive patients received therapeutic injections of chymopapain. There were no instances of unequivocal anaphylaxis to chymopapain in the patients with negative skin tests treated with chymopapain. When this 0% incidence of systemic reactions in skin test negative patients is compared with the historical rate of 1%, this difference is statistically significant (p less than 0.05). Restriction of chymopapain treatment to patients with negative prick tests can reduce the incidence of systemic reactions.
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