Test Overview
Method
Immunoturbidimetry
Result Included
Von Willebrand Factor Activity
Specimen
Specimen Type
Plasma (Citrate)Volume
Sample Volume
1 mL
Collection & Handling
Handling Information
Separate and freeze immediately. Store and send frozen.
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Not frozen |
Performance & Interpretation
Turnaround Time
10 days
Results
Name
Units
Reference Range
Conversion
-
Von Willebrand Factor ActivityU/mLBlood Group O: 0.48 - 1.24
Other Blood Groups: 0.67 - 1.70
Limitations:
1. The presence of rheumatoid factor may produce an over-estimation of thetest result.
2. Some cases of type 2 Von Willebrand disease may give normal results with this activity assay.
Referral Location
Canada
Test Version
Last Updated
2023-03-01