[The significance of the thrombocyte crossmatching test]

The authors investigated the dependence of the results of the crossover test with thrombocytes and lymphocytes of the donor and serum of the recipient on the rise of thrombocytes 1 and 24 hours following administration of a thrombocyte concentrate. The clinical condition of the patient at the time of thrombocyte administration was taken into account. The donor of thrombocytes isolated in a blood element separator was selected from a panel of cca 800 subjects with previously assessed HLA antigens. A total of 36 administered concentrates was evaluated. From the assembled findings it may be concluded that the result of thromboconcentrate transfusion is significantly influenced by adverse clinical factors in the patient such as splenomegaly, haemorrhage, febrile conditions. A positive crossover lymphocytotoxic test can predict reliably the ineffectiveness of thrombocyte administration. A positive crossover test with the donor's thrombocytes does not affect significantly the success of the transfusion. It seems thus that for the fate of administered thrombocytes the presence of HLA antibodies is decisive and not the presence of specific thrombocytic antibodies.