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Test Code LABGP1BM Von Willebrand Factor GP1bM Activity

Clinical Information

Aid with the diagnosis of Von Willebrand disease.

Synonym

GP1bM

Von Willebrand

VWF

VWF Activity

Specimen Required

Preferred Container/Tube: 3.2% Citrate Blue Top - 2.7 mL
Specimen Volume: 2.7 mL
Acceptable Container/Tube: 3.2% Citrate Blue Top - 1.8 mL
Specimen Volume: 1.8 mL
Platelet poor plasma (PPP):
Specimen Volume: 2 - 1 mL aliquots platelet poor plasma (PPP)
Specimen Minimum Volume: 1 - 1 mL aliquot platelet poor plasma (PPP)

Specimen Stability Information

Ambient: 
     Whole blood: 4 hours
      Platelet poor plasma: 4 hours
Refrigerated: 
Frozen: 
      Platelet poor plasma: PPP removed from the cells and frozen at -20°C or ideally -70°C.

Rejected Due To

  • Ambient WB specimens >4 hours old
  • Ambient PPP specimens >4 hours old
  • Clotted specimens
  • Underfilled or overfilled tube
  • Gross hemolysis
  • Gross icterus

Reference Values

50-203 % Activity

Method Description

Latex turbidimetric immunoassay (Siemens Innovance® vWF Ac)

Performing Lab

Clinical Lab UH

Day(s) Performed

Monday through Friday (excludes OSU holidays)

Report Available

Same day/1 day

Reporting Name

Von Willebrand Factor GP1bM Activity

CPT Code Information

85397