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von Willebrand factor activity in plasma
Decreases:
- von Willbrand's disease with < 30% of normal
- persons with blood type O have 25% lower plasma vWF
- hypothyroidism
Increases:
- pregnancy & plasma estrogen
- stress
- exercise
- inflammation
- smoking
Specimen:
- citrated plasma
Related
von Willebrand factor; vWF; ristocetin cofactor; factor VIII related antigen; contains: von Willebrand antigen 2 (VWF, F8VWF)
von-Willebrand's disease (vWD)
Specific
ristocetin cofactor activity
von Willebrand factor collagen-binding activity
von Willebrand factor collagen-binding adhesion inhibitor
General
clinical coagulation test
References
- Medical Knowledge Self Assessment Program (MKSAP) 17,
American College of Physicians, Philadelphia 2015