QuantiFERON-TB Gold Plus
Methodology
Whole blood interferon-gamma test measuring responses to CD4+ and CD8+ T cell antigens
Alternate Names
Interferon-gamma Release Assay (IGRA) for Mycobacterium tuberculosis, QFT Plus
SoftLab Order Code
QFTBG
Epic Order Name
Quantiferon TB Gold Plus
Epic Order ID
LAB4099
Laboratory
Raleigh
Sample Type
Plasma
Collection Container
QIAGEN QuantiFERON TB Gold Plus Blood Collection Tubes Set
Alternative Collection Container
N/A
Collecting Volume
1.0 mL per tube - fill to line - over or underfilled tubes will be rejected
Storage or Stability
Ambient
Causes for Rejection
Not incubated within 16 hours from collection, hemolysis, overfilled tube(s), underfilled tube(s) - quantity not sufficient
Instructions
Important:
Do not overfill or underfill tubes. Each tube has a fill line and will hold exactly 1.0 mL of blood.
After the blood is drawn into the tubes, place all tubes in one hand and perform ten firm shakes (up and down) very vigorously to completely mix the antigens into the blood (coating the entire length of the tubes). Some frothing is expected. All four tubes must be received.
Specimens should be received at testing laboratory within 8 hours from collection in order to guarantee incubation within the 16-hour requirement.
TAT
Specimens require a lengthy incubation. Expected TAT 24-72 hours.
CPT Codes
86480