Test Overview
Test Methodology

sDS Gel Electrophoresis

Test Usage

Useful for detecting variant forms of von Willebrand disease and confirmation of diagnosis.

Reference Range *

Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results. The multimeric analysis for vWD cannot separate normal from type I vWD. A negative result does not rule out vWD, but a positive one is diagnostic of type II vWD and variants.

Test Details
Days Set Up
Monday - Thursday
Analytic Time

7 - 21 days

Soft Order Code
VWFMS
MiChart Code
Von Willebrand Multimeric
Synonyms
  • Factor to sDS Gel Polymers
  • sDS Gel Electrophoresis
  • von Willebrand Factor Polymers
Laboratory
Sendout
Reference Laboratory
Mayo VWFMS (8844)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in blue top (citrate) tube. Centrifuge specimen and aliquot citrate platelet-poor plasma into a plastic tube. Centrifuge plasma again and aliquot platelet-poor plasma into 2 plastic vials (no glass); vials should contain a minimum of 0.5 ml each. Freeze plasma immediately at <40 degrees C. Transport frozen specimen on dry ice. Specimen should be collected prior to coagulation factor replacement therapy. Proper collection and handling of specimens is critical; see Coagulation tab of the handbook to ensure that the proper technique is used. Please provide Factor VIII Assay, von Willebrand Factor Activity (Ristocetin Co-Factor), and von Willebrand Factor Antigen (Factor VIII Related Antigen) results from the same specimen collection if available.

Normal Volume
1 ml citrated platelet-poor plasma
Minimum Volume
0.5 mL
Storage Temperature
Strict frozen
Additional Information

Von Willebrand Factor Activity (ristocetin co-factor) and von Willebrand Factor Antigen (factor VIII related antigen) results from the same collection date and time as the specimen submitted are required before performing this assay. If already assayed, please submit numerical results. If these results are not submitted the assays will be performed by MLabs at an additional charge. If available, also submit results for Factor VIII Assay. Test sent to Mayo Medical Laboratories. Specific requests for von Willebrand multimer analysis only will be referred to BloodCenter of Wisconsin.

Billing
CPT Code
85247
Fee Code
20480
LOINC
6013-7
NY State Approved
No