VWF AG

Von Willebrand Factor Antigen, Plasma

EPIC Test Procedure Code: LAB2471

Performing Lab:
Saint Luke's Regional Laboratories
Container Type:
Light blue top (sodium citrate) tube
Specimen Type:

Platelet Poor Plasma

Preferred Volume:
2 mL
Minimum Volume:
1 mL
Collection Procedure:
Specimen Processing:

1. Centrifuge specimen in a centrifuge that has been validated to ensure platelet poor plasma.
2. Immediately transfer the plasma to a stoppered, plastic tube and centrifuge again for 10 minutes.
3. Transfer the supernatant plasma into a screw-capped, plastic vial and send frozen at ≤ -20 °C, if possible.
4. If unable to centrifuge, forward unprocessed sodium citrate whole blood (minimum volume: 2 mL) to the laboratory promptly at room temperature only.

Store and Transport:
Frozen (plasma)
Stability:

The unspun specimen must arrive within 2 hours of collection.

CPT Codes:

85246 - Von Willebrand Factor (EAP 30023000)

Test Schedule:
Monday - Friday
Method:
Latex Immunoassay (LIA)
Reference Ranges:

52 - 175 %
Notes:

Note: VWF ACT "von Willebrand Factor Activity, Plasma" and FVIII "Coagulation Factor VIII (8) Assay, Plasma" are recommended in conjunction with VWF AG "von Willebrand Factor Antigen, Plasma."

Lab Personnel

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