Last Modified:
9/22/2021 2:47:15 PM
Medical Necessity Documentation:
Client Notes:
Patient Preparation:
Specimen Requirements:
Two (2) - 1.0 mL platelet poor plasma from a Blue Top Tube - 3.2% Na Citrate in a Plastic Vial
Collection Instructions:
Centrifuge light blue-top tube for 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 a new plastic vial. Plasma must be free of platelets (<10,000/mcl). Freeze immediately and ship on dry ice. Note: 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.
Minimum Volume:
0.5 mL Platlet Poor Plasma
Transport & Storage: Temperature/Stability:
30 days Frozen
Rejection Criteria:
Hemolysis • Received room temperature • Received refrigerated
Reference Range:
50-217 %
Critical Ranges:
Test Comments:
Methodology:
Immunoturbidimetric Assay
Clinical Significance:
A decreased level of vWF:Ag is an indication of vW disease, an elevated level could be observed in endothelial cell activation.
Documentation:
Custom Panel:
No
PRODUCTION SCHEDULE
Turn Around Time:
3 to 5 days
Days Performed:
Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed:
Quest - Chantilly
PHL Test Code:
MSOT
EPIC Test Code:
Send Out Test Code:
4919
Included Tests:
CPT Coding:
85246
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