Methodology
Photometric Clot Detection
Synonyms
Factor 12
Specimen Type
Plasma
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB00970
Lab Test Days
Wednesday and Friday
Standard TAT
3-8 Days
Collection Information
Specimen Required
(one) 1.8 mL or (one) 2.7 mL Blood
Container Type
Light Blue (Sodium Citrate)
Processing Information - Lab Use Only
Transport Temperature
Frozen-Only
Specimen Stability
Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 Year
Rejection Criteria
Hemolysis; Received thawed; Received room temp; Received refrigerated
Test Volume Required
1 mL Platelet-Poor Plasma
Minimum Test Volume
0.5 mL Platelet-Poor Palsam
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 and send frozen.
CPT Codes
85280
Revised
09-03-19
Initials
SL