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Mayo Clinic Laboratories

Test Code FT11 Factor XI Activity, Plasma

Specimen Volume

3.0 mL

Preferred Specimen

Blue (BLU) Citrate

Specimen Handling Instructions

Tube must be full. Specimen must arrive in lab within 4 hours of collection, OR Centrifuge, place plasma in plastic vial and freeze.

Transport

Routine courier pick-up

Cutoff Time

None

Department

Hematology

Methodology

Photo-optical clot detection

Stat Turn-around Time

4 Hours

Routine Turn-around Time

1 Week

Reference Ranges

See Report