von Willebrand Factor Screen

Test ID: 

704581

CPT code:

85730, 85246, 85240, 85245

Synonyms:

von Willebrand Factor (vWF) Screening Profile (Esoterix)

Specimen Type:

Plasma, frozen

Requested Volume: 

Three 1-mL platelet-poor, frozen tubes

Container Type: 

Blue-top (sodium citrate) tube

Collection:

Plasma must be separated from cells within 45 minutes of venipuncture and centrifuged a second time before being placed in plastic transport tubes. Freeze within two hours and keep frozen until testing is performed. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.

Storage Instructions:

Freeze.

Rejection Criteria

Noncitrated plasma; gross hemolysis; presence of fibrin; clotted plasma