von Willebrand Factor Multimers


Sunquest Code:VWMULT  
Epic Code:LAB4584Epic Name:von Willebrand Multimers
Synonyms:Polymers, von Willebrand Factor; von Willebrand Protein Polymers sDS Gel, Plasma; VWF Multimers; von Willebrand Multimers
Methodology:Electrophoresis
CPT Code:85247
Turnaround Time:Specimens are sent to reference laboratory Mon-Sat; results are reported within 4-11 days.
Associated Links:

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



Collection Instructions

Specimen:Blood
Optimal Volume:2.7 mL (in 3 mL tube) - filled to fill line on the tube.
Minimum\Peds Volume:2.7 mL (in 3 mL tube) - filled to fill line on the tube.
Collection Instructions:See link to Specimen Collection and Processing for Coagulation Specimens.
After Care:If the patient has a coagulation abnormality, apply direct pressure to the puncture site for 10 minutes; apply a pressure dressing. Instruct the patient to leave the bandage on for 12 hours.
Causes for Rejection:Serum. Specimens collected in wrong anticoagulant. Clotted, hemolyzed or non-frozen 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 Lab Sendouts  (ARUP)
Referral Lab number:92281


Interpretive

Reference Range:Interpretive report provided.
Use:This is a qualitative assay to measure the variable concentration of the different sizes of von Willebrand factor multimers in a patient sample. This test may be used as an aid in the diagnosis of von Willebrand's disease.


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