Methodology
Immunoassay (IA)
Synonyms
TB Gold; QFT Gold Plus; QFT TB; QFT Plus; IGRA
Specimen Type
See Collection Instructions
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB09034
Lab Test Days
Daily
Standard TAT
2 Days
Collection Information
Specimen Required
0.8-1 mL Blood collected in the 4 QFT-Plus blood collection tubes
Container Type
See Below
Collection Instructions
For each patient, collect 1 mL of blood by venipuncture directly into each of the 4 QFT-PLUS blood collection tubes. These tubes should be at 17-25 C at the time of draw. If a "butterfly needle" is being used, a "purge" tube should be used to ensure that the tubing is filled with blood prior to the QFT(R)-Plus tubes being used. Immediately after filling the tubes, shake them 10 times just firmly enough to ensure the entire surface of the tube is coated with blood, to solubilize antigens on tube walls.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Ambient-OK
Specimen Stability
Room Temp: 72 Hours; Refrigerated: 72 Hours; Frozen: Unacceptable
Rejection Criteria
Non-incubated specimens; Received frozen
Test Volume Required
1 mL (x4) Incubated Blood
Minimum Test Volume
0.8 mL (x4) Incubated Blood
Processing Instructions
Each of the four tubes must be transferred to a 37 C + or - 1 C incubator as soon as possible and within 16 hours of collection for 16-24 hours. If the blood is not incubated immediately after collection, re-mixing of the tubes by inverting 10 times must be performed immediately prior to incubation. The specimen rack should sit off the floor of the incubator and the tubes should be upright. Following incubation, immediately transport the 4 collection tubes to Quest Diagnostic between 4 and 27 C. Samples will be stable for 72 hours at 4-27 C refrigerated or at room temperature.
CPT Codes
86480
Revised
09-27-22