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Lab Test Dictionary

Factor X Activity, Clotting (359)


Photometric Clot Detection


Factor 10

Specimen Type


Performing Lab

Quest Diagnostics San Juan Capistrano

Epic ID


Lab Test Days

Wednesday and Friday

Standard TAT

3-8 Days

Collection Information

Specimen Required

1.8-2.7 mL Blood

Container Type

Light Blue (Sodium Citrate)

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 Year

Rejection Criteria

Hemolysis; Received thawed; Received refrigerated; Received room temp

Test Volume Required

1 mL Platelet-Poor Plasma

Minimum Test Volume

0.5 mL Platelet-Poor Plasma

Processing Instructions

Centrifuge light blue-top tube for 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcl). Freeze immediately.

CPT Codes