DIFFERENTIAL DIAGNOSIS FOR AN ELEVATED aPTT
Heparin Therapy
Sample Contamination with Heparin
Warfarin Therapy
Collection to Test Sample Time Over 4 Hours
Hemophilia
Factor VIII Deficiency (Hemophilia A)
Factor IX Deficiency (Hemophilia B, Christmas Disease)
Factor XI Deficiency
Factor XII Deficiency (Hageman Factor)
Deficiency of Clotting Factors
Factor I Deficiency
Factor II Deficiency
Factor V Deficiency
Vitamin K Deficiency
Dietary
Antibiotic Therapy
Acute Hepatic Failure
Dysproteinemias
Gauchers Disease
Disseminated Intravascular Coagulation (DIC)
Fibrinolysis
Congenital Afibrogenemia
Ingestion of Rodent Pesticides
Brodifacoum