von Willebrand Factor GPIbM Activity

TEST: 520553

CPT: 85397

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Expected Turnaround Time

4 - 7 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Plasma (3.2% citrated), frozen

Volume

1.5 mL

Minimum Volume

0.8 mL

Container

Plastic transfer tube

Collection

Venipuncture with conservative tourniquet use; centrifuge whole blood to obtain platelet-poor plasma. Transfer plasma into a plastic transport tube. Freeze at -70°C.

Storage Instructions

Freeze.

Stability Requirements

Temperature	Period
Frozen	1 month
Freeze/thaw cycles	Stable x5

Test Details

Use

This test is used for quantitative determination of the von Willebrand factor-GPIb activity and can be used as an aid in the evaluation of patients with suspected or confirmed von Willebrand factor disorders.

Methodology

Latex-based turbidimetric

LOINC® Map

Order Code	Order Code Name	Order Loinc	Result Code	Result Code Name	UofM	Result LOINC
520553	VWF GPIbM Activity		520554	VWF GPIbM Activity	BU/mL	Pending

CPT Statement/Profile Statement

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