A 19 year old man with a history of a “bleeding disorder” comes to the ED with hemarthrosis after trauma. Test Result Reference Range PT 13.4 sec (INR 0.97) PTT 112.1 sec Fibrinogen 278 mg/dL TT 10 sec Platelet count 250 K/uL PTT Mixing study: Time 0 sec PTT Mixing study: 1 hour at 37°C FVIII FIX FXI VWF
[Answered]: A 19 year old man with a history of a “bleeding…
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