Epic Code LAB7570 von Willebrand Factor Antigen
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:
-
Detailed instructions (link): Anticoagulant Correction for High Hematocrit
-
Detailed instructions (link): Blue Citrate Tube
- Specimen should be processed within 1 hour – See Processing Instructions below
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