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Test Code LAB1112 Von Willebrand Panel

Additional Codes:

VW PANEL

Includes:

Includes APTT, VIII:C (Factor VIII), VWF Activity (Ristocetin Co-Factor) and Pathologist interpretation

Notes:

VW Antigen and VW multimer are not included in the Von Willebrand Panel and must be ordered separately.

Collection:

Specimen: Blood 

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

Specimen Volume:  3 (Three) 3.5 mL Must be filled to arrow (Greiner tube Black Disk) or line (BD)

Pediatric Collection: 

  • 2 (Two) 3.5 mL Must be filled to arrow (Greiner tube Black Disk) or line (BD)

OR

  • 3 (Three) 2.0 mL Must be filled to arrow (Greiner tube White Disk) or line (BD)

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: 2 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.

Turnaround Time (TAT):

Results reported in one week.

Test Availability:

Batched once per week, day varies.

Assay:

2 ml plasma

Send To:

UMC MAIN LABORATORY Specimen Receiving – EH318 University Hospital Extension

Reference Interval:

See individual tests