von Willebrand Factor Panel


Sunquest Code:IndivCodes  
Order Instructions:Order Indiv Codes.
Synonyms:VWF Panel; VWF Panel (F8, Antigen, Activity); von Willebrand Factor Panel (F8, Antigen, Activity)
Methodology:See individual test listings
CPT Code:----------CPTCODES HERE----------
Test Includes:Factor 8 activity, VWF antigen and a VWF activity assay (VWF activity or VWF activity (done at UMMC East Bank) with reflex to Ristocetin Cofactor Activity and von Willebrand factor multimers (done at ARUP).
Turnaround Time:Specimen is accepted and processed 24 hours/day. Tests are performed 1-3 times/week. Results are reported in 2-7 days.
Special Instructions:See individual test codes for billing information and turnaround times. Ristocetin Cofactor Activity and VWF multimers are sent to ARUP Laboratories and may not be sent per VWF algorithm and pathologist evaluation. See Associated Links.
Associated Links:

Specimen Collection and Processing for Coagulation Specimens, von Willebrand Factor (VWF) Panel Algorithm, von Willebrand Factor (VWF) Screen Algorithm



Collection Instructions

Specimen:Blood
Optimal Volume:Three 3 mL tubes, each containing 2.7 mL blood; each filled to fill line on the tube.
Minimum\Peds Volume:Two 3 mL tubes, each containing 2.7 mL blood; each filled to fill line on the tube.
Collection Instructions:See link to Specimen Collection and Processing for Coagulation Specimens.
Causes for Rejection:Underfilled tube or clotted specimens. Hemolyzed, icteric or lipemic specimens.


Processing and Shipping

Specimen Processing:See link to Specimen Collection and Processing for Coagulation Specimens.
Shipping Instructions:See link to Specimen Collection and Processing for Coagulation Specimens.
Test Performed at or Referral Lab Special Coagulation  (UMMC-East Bank)


Interpretive

Reference Range:See individual test listings.
Use:See individual tests listings.


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