FRACP Questions 1997- HAEMATOLOGY

The following investigation results are obtained: APTT 45 sec (26 – 35) PT 14 sec (12 – 14) Thrombin clotting time 18 sec (16 – 20) Fibrinogen 2.5 g/L (1.8 – 4.0) APTT after 50:50 dilution with normal plasma. 40 sec (26 – 35) The results indicate which one of the following? A. Activated protein C resitance. B. Factor XII deficiency ................
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