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THC Metabolite, Serum or Plasma, Quantitative
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Detect exposure to cannabinoids.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Sun-Sat
1-4 days
Gray (sodium fluoride/potassium oxalate). Also acceptable: Plain red, green (sodium heparin), lavender (EDTA), or pink (K2EDTA).
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Refrigerated.
Separator tubes. Plasma or whole blood collected in lt. blue (sodium citrate). Specimens exposed to repeated freeze/thaw cycles. Hemolyzed specimens.
After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 years
Effective August 17, 2015
| Drugs Covered | Cutoff Concentrations |
| 11-Nor-9-carboxy-THC | 5 ng/mL |
Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Positive cutoff: 5 ng/mL
For medical purposes only; not valid for forensic use.
The drug analyte detected in this assay, 9-carboxy THC, is a metabolite of delta-9-tetrahydrocannabinol (THC). Detection of 9-carboxy THC suggests use of, or exposure to, a product containing THC. This test cannot distinguish between prescribed or non-prescribed forms of THC, nor can it distinguish between active or passive use. The plasma half-life for 9-carboxy THC metabolite is estimated to range from 4-12 hours.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
80349 (Alt code: G0480)
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0090671 | 11-Nor-9-carboxy-THC, S/P, Quant | 8170-3 |
- 9-Carboxy-THC
- Cannabinoids
- Cannabis
- Dronabinol
- Marijuana
- Marinol
- Pain Management
- THC
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