Screening tests for the evaluation of VWD include the platelet count, APTT, PT, the bleeding time, and/or the PFA-100.Which of the following results would be evident in most cases of VWD?

Question

Quizplus · Accepted Answer

A decreased ristocetin platelet aggregation test is the best screening test for VWD. A low platelet count may be seen in some cases of VWD, but it is not a consistent finding. VWF: Ag assay measures the quantity of VWF in the blood, but it does not necessarily reflect VWF function, which is impaired in VWD.

Screening Tests for the Evaluation of VWD Include the Platelet