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Printable Test Catalog - OU Medicine

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<strong>Test</strong>ing volume: 1 mL of PLASMA<br />

MINIMUM VOLUME: 1 full tube<br />

<strong>Test</strong>ing volume: 0.5 mL of PLASMA<br />

TEST AVAILABILITY: Monday-Friday<br />

TURNAR<strong>OU</strong>ND TIME: 1-3 days<br />

REFERENCE RANGE: 60-150%<br />

CLINICAL USE: A coagulation parameter useful in the<br />

differential diagnosis of hemophilia A and von<br />

Willebrand disease<br />

CPT: 85246<br />

[VWF28] von WILLEBRAND FACTOR EXON 28<br />

SPECIMEN REQUIRED: Whole blood at room temperature or<br />

refrigerated<br />

TUBE OR CONTAINER : Lavender (EDTA)<br />

SPECIMEN VOLUME: 7 mL<br />

MINIMUM VOLUME: 5 mL<br />

TEST AVAILABILITY: Daily<br />

TURNAR<strong>OU</strong>ND TIME: 10-14 days<br />

REFERENCE RANGE: Normal<br />

METHODOLOGY: Polymerase Chain Reaction (PCR) and direct DNA<br />

sequencing<br />

CPT: 83891; 83892 x 2; 83898 x 2; 83904 x 4; 83909 x 8; 83912<br />

[VWFCBA] vWF COLLAGEN BINDING ACTIVITY<br />

SPECIMEN REQUIRED: Frozen plasma<br />

TUBE OR CONTAINER : Blue (Citrate)<br />

SPECIAL HANDLING: Draw 3 FULL citrate tubes; tube must be filled<br />

to the fill line to ensure proper anticoagulant<br />

to blood ratio; Invert gently 3-4<br />

times to prevent clotting<br />

Send to lab immediately or centrifuge and<br />

freeze plasma<br />

SPECIMEN VOLUME: 4 mL<br />

MINIMUM VOLUME: 2 mL<br />

TEST INCLUDES: von Willebrand Collagen binding activity; von<br />

Willebrand antigen and Collagen binding ratio<br />

TEST AVAILABILITY: Daily<br />

TURNAR<strong>OU</strong>ND TIME: 2-5 days<br />

REFERENCE RANGE: CBA activity: 50% to 150%<br />

CBA ratio: 0.6:5.0<br />

vWF antigen: 50% to 150%<br />

METHODOLOGY: Enzyme-linked immunosorbent assay (ELISA)<br />

CLINICAL USE: Screen for the presence of type II von Willebrand<br />

disease in plasma<br />

CPT: 83520; 85246<br />

[VWFNa] VON WILLEBRAND FACTOR NORMANDY<br />

SPECIMEN REQUIRED: Whole blood at room temperature<br />

TUBE OR CONTAINER: Lavender (EDTA) or Yellow (ACD)

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