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Response of patients with bleeding disorder to DDAVP administration.

DDAVP has been shown to provide hemostasis in patients with bleeding disorder. Thirty-one episodes of intravenous DDAVP administration (0.3-0.4 microgram/kg) in 22 patients with bleeding disorder were studied. There were 13 patients with hemophilia A, 1 with type I vWD and 8 with inherited and acquired platelet dysfunction. The age ranged from 2.3-26 yrs (mean +/- SD = 10 +/- 4.8). None of the 3 severe hemophilia A patients responded to the treatment. Two out of five episodes in 4 moderate hemophilia A patients responded clinically and had minute increments of F VIII:C. Ten out of eleven episodes (91%) in 6 mild hemophilia A patients had good responses. The dental procedures for these patients were successfully performed without blood component transfusion. The increments of F VIII:C ranged from 1.5-6.8 folds over the baseline levels (mean +/- SD = 2.5 +/- 1.4). In addition, two episodes of epistaxis in a vWD patient responded excellently and one dental procedure was successfully performed by giving DDAVP. The increments of F VIII:C and vWF:Ag ranged from 2.8-12.5 and 2.9-8 fold over the baseline levels respectively. The prolonged bleeding times were shorten to 6.5-7 minutes. Only three out of eight episodes in 8 inherited and acquired platelet dysfunction patients showed temporary responses. The bleeding time responses did not correlate with in vitro platelet aggregation.