THC Metabolite, Serum or Plasma, Quantitative
Also known as: CANNAB SP
Use
This test is used to detect exposure to cannabinoids, specifically identifying the presence of 11-Nor-9-carboxy-THC, a metabolite of THC, in serum or plasma. The detection of this metabolite suggests the use of, or exposure to, a product containing THC, although it cannot distinguish between the delta-8 and delta-9 forms or their respective metabolites. It also cannot differentiate between prescribed or non-prescribed forms of THC, nor between active or passive use.
Special Instructions
The test requires the specimen to be separated from cells ASAP or within 2 hours of collection and transferred to an ARUP standard transport tube. It is important to avoid collecting plasma or whole blood in sodium citrate tubes and prevent repeated freeze/thaw cycles that may affect the specimen integrity.
Limitations
This test cannot differentiate between active and passive exposure to THC or differentiate between prescribed and non-prescribed forms. It is not valid for forensic use and is intended solely for medical purposes. The plasma half-life for the detected metabolite is estimated to range from 4-12 hours.
New York Approved
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 8170-3
Result Turnaround Time
1-5 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
ARUP standard transport tube
Collection Instructions
Separate serum from cells ASAP or within 2 hours of collection.
Causes for Rejection
Separator tubes; Plasma or whole blood in sodium citrate; Repeated freeze/thaw cycles.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 week |
| Refrigerated | 2 weeks |
| Frozen | 3 years |