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Von Willebrand Antigen, Multimeric Analysis

Order Name VON W MULT
Test Number: 1502250
Revision Date 12/12/2022
Test Name Methodology LOINC Code
Von Willebrand Antigen, Multimeric Analysis
Western Blot 32217-2 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2 mL (1) Plasma Sodium Citrate 3.2% (Blue Top) Frozen
Instructions Specimen Type: Blue-top (sodium citrate) tube
Specimen Storage: FREEZE
Specimen Collection: Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.[1] Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.[2,3] The sample should be mixed immediately by gentle inversion at least 6 times to ensure adequate mixing of the anticoagulant with the blood. A discard tube is not required prior to collection of coagulation samples.[4,5] When noncitrate tubes are collected for other tests, collect sterile and nonadditive (red-top) tubes prior to citrate (blue-top) tubes. Any tube containing an alternate anticoagulant should be collected after the blue-top tube. Gel-barrier tubes and serum tubes with clot initiators should also be collected after the citrate tubes. Centrifuge and (using a plastic transfer pipette) carefully remove the plasma without disturbing the cells. Transfer the plasma into a LabCorp PP transpak frozen purple tube with screw cap (LabCorp ID 23751). The specimen should be FROZEN immediately and maintained frozen until tested. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Special Instructions: Testing is performed at Esoterix Coagulation Laboratory: UY#300117
GENERAL INFORMATION
Expected TAT 4 - 11 days  
Performing Labcorp Test Code 500148 
CPT Code(s) 85247
Lab Section Reference Lab