von Willebrand Comprehensive Panel 2

Last Modified: 5/21/2019 7:19:49 AM


  Medicare Medical Necessity Restrictions May Apply
Medical Necessity Documentation: 85730 may require ABN
Client Notes:  
Patient Preparation:  
Specimen Requirements:

1.0 mL Frozen Plasma from each of 4 Blue Top Tubes - 3.2% Na Citrate in a 4 Plastic Vials
Collection Instructions:

Centrifuge light blue-top tube 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into four new plastic vials. Plasma must be free of platelets (<10,000/mcL).

4 separate plastic vials 1.0 mL plasma frozen and sent  
Minimum Volume: 0.75 mL (x4)
Transport & Storage: Temperature/Stability:

14 days Frozen

Freeze immediately and ship on dry ice.

Storage of whole blood at refrigerated temperatures prior to processing may lead to cryoprecipitate formation and falsely low Factor VIII and von Willebrand Factor studies.
Reference Range: Refer to Interpretive Results
Critical Ranges:  
Test Comments:  
Methodology: Various
Clinical Significance:  
Documentation:  
Custom Panel: No

PRODUCTION SCHEDULE

Turn Around Time: 3 days
Days Performed: Monday, Wednesday, Friday
Sites Performed: Quest - Chantilly
PHL Test Code: MSOT
EPIC Test Code:
Send Out Test Code: 15540
Included Tests: Activated Partial Thromboplastin Time; Factor VIII Activity, Clotting; von Willebrand Factor Antigen; Ristocetin Cofactor; von Willebrand Factor Collagen Binding Assay; von Willebrand Antigen, Multimeric Analysis
CPT Coding: 83520, 85240, 85245, 85246, 85247, 85730

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