von Willebrand Factor Activity (Ristocetin Cofactor)
| CPT Code(s): | 85245 |
| Specimen Required: | Patient Preparation: Collect:Lt. blue (sodium citrate). Refer to Specimen Handling at reliancediagnosticslab.com for hemostasis/thrombosis specimen handling guidelines. Specimen Preparation:Transfer 1.5 mL platelet-poor plasma to an RDL Standard Transport Tube. (Min: 1 mL) Storage/Transport Temperature:CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Stability:Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: at -20°C: 3 months; Frozen at -70°C: 6 months |
| New York DOH Approval Status: | This test is New York DOH approved. |
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