Tetrahydrocannabinol (THC) Screen With Reflex Confirmation, Whole Blood
Use
This test is used to screen for the presence of Tetrahydrocannabinol (THC) in whole blood samples. The initial screening is conducted using an immunoassay method to detect THC at a threshold of 5 ng/mL. If the result is positive, a confirmatory test is performed using chromatography mass spectrometry (GC/MS) or liquid chromatography–mass spectrometry (LC-MS/MS) to limit the quantitation.
Special Instructions
The test employs an initial immunoassay with reflex to confirmatory mass spectrometry testing for presumptive positive results, enhancing the accuracy of THC detection in whole blood samples.
Limitations
The test was developed by LabCorp and its performance characteristics determined internally. It has not been cleared or approved by the US FDA. The LOINC provided pertains to the ordering and result codes which may assist in electronic health record integration.
Methodology
Immunoassay (Multiplex Protein Panel)
Biomarkers
LOINC Codes
- 42491-1
- 42491-1
- 48943-5
- 73935-9
- 48944-3
- 48934-4
- 82964-8
Result Turnaround Time
4-10 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
7 mL
Minimum Volume
3 mL
Container
Gray-top (sodium flouride/sodium oxalate) tube, green-top (heparin) tube, or lavender-top (EDTA) tube
Storage Instructions
Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | <3 days |