positive results ( greater than 20 % aggregation ) occurred in ( 1 ) five of 14 patients with heparin-associated thrombocytopenia , ( 2 ) 0 of 16 consumptive thrombocytopenic controls not given heparin therapy , ( 3 ) one of 14 nonthrombocytopenic controls given heparin , and ( 4 ) one of 13 healthy controls , giving a sensitivity of 36 % and specificities of 100 % , 93 % , and 92 % , respectively .
C0040034
thrombocytopenia
C0019134
heparin