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Test Code LAB2073 Von Willebrand Factor Activity

Additional Codes:

VWF

Collection:

Specimen: Blood

Container: Blue Top Tube with 3.2% (0.109 M) buffered Sodium Citrate anticoagulant only

Volume: 3.5 mL; Minimum 2.0 mL. Tube must be filled to indicated line.

 

Notes: 

  • Samples not filled properly will be rejected (over or under filled).
  • If the patient's hematocrit is >55%, call Lab Client Services at 792-0707 to obtain an anticoagulant adjusted tube.
  • For collection information and guidance refer to MUSC Laboratory Services Hemostasis / Coagulation Collection Guidelines

Storage Instructions:

Room Temperature: 4 hours Whole Blood

Frozen at or below -20°C: 2 weeks 

Note:

  • Frozen samples must be platelet poor plasma aliquoted from primary tube. Label as Na Citrate or blue top plasma.
  • The plasma aliquot tube must be labeled with the type of anticoagulant or vacutainer tube type used to collect the original specimen.

Turnaround Time (TAT):

7 days

Test Availability:

Once per week; day varies

Request Form:

Routine Laboratory Request Form

Send To:

UMC MAIN LABORATORY Specimen Receiving – EH319 University Hospital Extension

Reference Interval:

50 – 150 %