VWF Multimers
Profile or Test Panel |
Bleeding Diathesis with a Normal aPTT/PT Profile
VWD Profile
If the aPTT is prolonged and the factor VIII is normal, this panel reflexes to an aPTT Reflexive Evaluation Profile.
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Indications | In the setting of abnormal VW antigen and/or activity testing. |
Method | Western Blot |
Test Information | VWF multimer analysis determines the presence of high, intermediate and low molecular weight Multimers. It does not distinguish common type 1 VWD from normal. |
Additional Test Information | Normal ranges are included on testing report and can be made available upon request. |
Sample Requirements | Whole Blood: 3.2% sodium citrated (blue top) OR frozen plasma. |
Requested Volume | Two 5 ml 3.2% sodium citrated (blue top) tubes as whole blood OR frozen plasma in 4 X 1mL aliquots in plastic tubes. |
Sample Information | Whole blood is preferred for testing, but if it is not possible to send whole blood tubes TO ARRIVE HERE WITHIN 2 HOURS of collection, then send frozen plasma. To prepare plasma, centrifuge blue top tubes at 1500g for 15 minutes and remove the plasma and centrifuge a second time at 1500g for an additional 15 minutes. Aliquot approximately 1 ml of plasma into 4 plastic tubes, and freeze. |
Shipping Information | Whole Blood: Send at ambient temperature (18-25°C) and must be received within the lab in less than or equal to 2 hours after collection.
Frozen Plasma: Send on dry ice Send samples to: For additional information, please see Ordering Information |
Requisition Form | RFT- Hemostasis Reference Laboratory |
Transaction Code | 3210-24 |
CPT Codes | 85247 |
Test Schedule | Run Monthly |
Turn Around Time (analytic time) | Contact Laboratory |
Report/Results | Fax number required to receive report |