APTT (prolonged)
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A lengthened APPT may indicate:
- factor VIII deficiency
- factor VIII inhibitors
- factor IX deficiency
- factor XI deficiency
- presence of antiphospholipid antibodies
- heparin usage
Last reviewed 01/2018
Links:
- factor VIII:C deficiency
- von Willebrand's disease (congenital deficiency of von Willebrand's factor )
- inhibitors to Factor VIII
- factor IX deficiency
- factor XI deficiency
- antiphospholipid antibody syndrome
- heparin
- APTT
- interpretation of the results of screening tests used in the diagnosis of coagulation disorders
- raised APTT due to secondary haemophilia