RBCF – “RBC Folate”

Update to specimen information, specimen preparation, minimum volume, and stability.

Specimen Information: If specimen is submitted frozen, please provide hematocrit result. A hematocrit collected within 24 hours of the RBCF collection is acceptable if the patient has not received a transfusion or experienced excessive bleeding in that 24 hour period.

Please note: Methotrexate and leucovorin may interfere with assay.

Specimen Preparation: Send 3.0 mL whole blood (entire sample) in the original collection tube.

Minimum Volume: 1.0 mL (mixed well)

Stability:

Room temperature: 8 hours
Refrigerated: 72 hours
Frozen: 60 days