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Epic Code LAB7570 von Willebrand Factor Antigen

Important Note

There is currently a nationwide shortage of this tube. Please take steps to ensure specimen integrity to reduce recollection. Specimen Tube Shortage (link)

Test Name Alias

Von Willebrand Factor Antigen Level | Factor VIII (8) Related Antigen Level | Von Will Ag | Von Willebrand Screen | VonWillebrand | 8389

Interface Order Alias

10282

Quick Collect

+(1)S10/POx3/F

Collection Instructions

Specimen Collection: Blood

 

Container(s): 3.2% Na Citrate Tube (blue top)

Preferred Volume to Collect: 2.7 mL (full tube)

Minimum Volume to Collect: 1.8 mL (full tube)

Capillary collect ok: No

Microtainer acceptable: No

 

Collection Instructions:

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Platelet Poor Plasma

 

Centrifuge/Spin: Yes

Aliquot: Yes

 

Processing Instructions:

  • Detailed instructions (link): Preparing Platelet Poor Plasma
  • Separate plasma into 2 - 3 aliquots, minimum of 0.5 mL each.
  • Freeze aliquots in plastic transport tubes immediately.

Transport Temperature:

  • Ambient (up to 1 hour in whole blood state)
  • Frozen (plasma only >1 hours)

Rejection Criteria

  • Hemolysis
  • Specimen has been thawed

Specimen Stability

Ambient: 1 hour

Frozen: 2 months

Laboratory Retention: 2 months

Test Frequency

Available Monday-Friday, usual TAT 1-4 days.

Reference Range

Adult: 50 – 160 %

Pediatric reference ranges have not been established

Performing Department

Coagulation

Performing Department Laboratory Location

Corewell Health Reference Laboratory, Grand Rapids, MI

Methodology

Immuno Turbidometric Assay

CPT

85246

CDM Code

3058524601

Epic Test ID

1230101296

LOINC

Von Willebrand Ag: 27816-8

Mayo Access Code

SHO8389

Reviewed Date

3/23/2023