Laboratory results on a patient with a severe bleeding probl…
Laboratory results on a patient with a severe bleeding problem are as follows: Platelet count 200 x 103/mm3 prothrombin time 20.0 sec(control 12.0 sec) APTT 100 sec(control 32.0 sec) CORRECTION TESTS normal plasma no correction Based on this data, which of the following will provide the additional information to support the diagnosis you suspect?