Von Willebrand Factor Assay

CERNER / EPIC MNEMONIC: VW ASSAY
POE DESCRIPTION: VON WILLEBRAND FACTOR ASSAY; VW ASSAY
CPT CODE: 85245-90
CDM NUMBER:

3181214

TURNAROUND TIME: 5-7 working days
SPECIAL INSTRUCTIONS:

This test cannot be added onto an existing sample.

CONTAINER TYPE:

Blue citrate tube

COLLECTION: See Section - '''' Specimen Collection Guidelines '''' - Coagulation Specimens.
SPECIMEN REQUIREMENTS:

4.5 mL blood (1.0 mL citrated plasma)

REJECTION CRITERIA:

Specimen hemolyzed; Hct > 55%; underfilled tubes (QNS)

MINIMUM VOLUME:

Use pediatric tube: 1.6 mL blood (0.5 mL citrated plasma). Pediatric tubes must be fully drawn.

REFERENCE RANGE:

See Specialty Labs - Search Test Code 4459

LAST UPDATED:

4-3-2013

TEST SYNONYM(S):FVIIIR:RCoF; Ristocetin Cofactor; vWF Activity; vW Factor Assay; vWF Ristocetin Cofactor (R:Co) Activity