von Willebrand Factor Activity Actual to Control Ratio Measurement

**Semantic type:** Laboratory Procedure

**Definition:** The determination of the ratio of the biological activity of von Willebrand factor dependent coagulation in a subject's specimen when compared to the same activity in a control specimen. The measurement may be expressed as a ratio or percentage.

**Synonyms:** - VWFAAC - von Will Factor Act Actual/Control - von Will Factor Act Actual/Control - von Willebrand Factor Activity Actual/Normal - von Willebrand Factor Activity Actual/von Willebrand Factor Activity Control