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Von Willebrand Multimers *

SIM

21135 

CPT

85247 

Synonyms

vWF Multimers 

Specimen Type

Plasma 

Container

Blue-top (sodium citrate ) tube

Collection Instructions

Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate. Tubes must be filled to completion to ensure a proper blood to anticoagulant ratio. Sample should be mixed by gentle inversion at least six times to ensure adequate mixing of anticoagulant with the blood. Do not draw from an arm with a heparin lock or heparinized catheter

Volume

Volume: 2 ml. 
Min. volume: 1 ml. 

Additional Information

Diagnosis of von Willebrand factor (vWF) deficiency subtype

Patient Preparation

Do not draw from an arm with a heparin lock or heparinized catheter.

Specimen Processing Instructions

Separate plasma from cells ASAP, being careful not to disturb the cells

Transport Requirements

Freeze

Specimen Stability

Frozen : 7 days

Rejection Criteria

Serum; plasma from tube other than blue-top (sodium citrate) tube;

Reference Range

Reference range accompanies report

Critical Value

 

Test Includes

von Willebrand  Factor multimers 

Methodology

Western blot 

Testing Frequency

 

LCA

500148 

Reviewed By

Lisa McBride

Reviewed Date

2/19/2018

Supplemental

*  Denotes  Reference Lab Test

Reviewed by Lisa McBride on February 19, 2018

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