Methodology
Clot Based Assay; Photometric Clot Detection
Synonyms
APTT; Bethesda Titer
Specimen Type
Plasma
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB01204
Lab Test Days
Tuesday
Standard TAT
3 Days
Collection Information
Specimen Required
(two) 1.8 mL or (two) 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: 14 Days
Test Volume Required
2 mL Platelet Poor Plasma (x2)
Minimum Test Volume
1 mL Platelet Poor Plasma (x2)
Processing Instructions
Platelet-poor plasma: Centrifuge light blue-top tube for 15 minutes at approximatley 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
85250, 85335
Revised
09-27-18
Initials
SL