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Test Code LAB3116 VON WILLEBRAND FACTOR ACTIVITY

Important Note

There is a national supply shortage for the von Willebrand factor activity reagent kits.  Our lab has access to a limited supply and we have reduced the days we perform this testing from 5 days/week to 1 day/week.  The vendor is expecting the reagent supply to be restored by the end of May 2026.

Additional Codes

Orderable Codes:

Epic Code Atlas Code Mayo Access ID Order LOINC
LAB3116 VWACT FAH5455 27816-8

Result Component(s): 

Reporting Name Epic Code Atlas Code Mayo Access ID Result LOINC
VWF Activity 12301000153 VWACT FAH5455 27816-8

 

Specimen Information

Container Specimen Temperature Collect Vol Submit Vol Min Vol Stability
Blue Top Tube Plasma Frozen To fill line 2 mL plasma 0.5 mL plasma 6 months
Blue Top Tube Whole Blood Ambient To fill line To fill line To fill line 4 hours

Refer to  Coagulation Specimen Handling prior to collection. Submit 2 × 0.5 mL frozen plasma aliquots for this test. Draw blood in light blue top tube(s). If sample can be submitted within 3 hours, submit whole blood at ambient temperature. If this is not possible, spin down tube and remove plasma. Spin plasma again and place citrate platelet-poor plasma in required number of plastic vials Glass vials cannot be accepted.) Freeze specimen at less than or equal to minus 40° C, if possible. Send specimen frozen on dry ice. Each coagulation assay requested should have its own vial.

Test Schedule / Analytical Time / Test Priority

**Monday – Friday, run starts at 10 am / Same day / Available STAT, nights and weekends with pathologist approval

**Temporarily reduced to 1 day/week.

Method

Latex Particle Enhanced Immunoturbidmetric

CPT(s)

Description CPT Code
VWF Activity 85245

 

Instrumentation

ACL Top
 

Reference Range

49 – 153%

Section

Coagulation

Performing Location

University of Vermont Medical Center

Is the UVMMC lab NY State Certified to perform this testing?  Yes/No

Yes