THC Metabolite, Serum/Plasma, Qt
Test Mnemonic
THCMET
CPT Codes
- 80349 - QTY (1)
- G0480 - QTY (1)
Aliases
- Cannabinoids
- Cannabis
- Dronabinol
- Marijuana
- Marinol
Includes
- 11-Nor-9-carboxy-THC
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | No additive (Red) | Refrigerated | Do not use serum separator tubes. Separate serum from cells ASAP or within 2 hours of collection |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | EDTA (Lavender) | Refrigerated | Do not use plasma separator tubes. Separate plasma from cells ASAP or within 2 hours of collection | |
| 1 mL | Plasma | Sodium heparin (Green) | Refrigerated | Do not use plasma separator tubes. Separate plasma from cells ASAP or within 2 hours of collection | |
| 1 mL | Plasma | Potassium oxalate/sodium fluoride (Gray) | Refrigerated | Do not use plasma separator tubes. Separate plasma from cells ASAP or within 2 hours of collection. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | After separation from cells: 1 week |
| Refrigerated | After separation from cells: 2 weeks |
| Frozen | After separation from cells: 3 years (Avoid repeated freeze/thaw cycles) |
Days Performed
Sun, Tue, Thu, Fri
Turnaround Time
2 - 6 days
Methodology
| Name | Description |
|---|---|
| Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
Special Info
This test is a reflex from Drug Screen 9 Panel, Serum or Plasma (DRGSC9). This test is New York DOH approved.
Clinical Info
Positive cutoff: 5 ng/mL
Clinical Limitation
For medical purposes only, not valid for forensic use.