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Von Willebrand Factor, Activity (Ristocetin Cofactor)
S104
Methodology: | Platelet Agglutination |
Performed: | Mon-Sat |
Reported: | 3-5 days |
Specimen Required: | Collect: Lt. Blue (sodium citrate) – 2 ml plasma. Specimen Preparation: Transfer platelet-poor plasma to a Standard Transport Tube. Storage/Transport Temperature: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Unacceptable Conditions: Serum. Hemolyzed or non-frozen specimens. Stability: Refrigerated: Unacceptable; Frozen: 1 week |
CPT Code(s): | 85245 |