Cannabinoids – Qual
| Test Mnemonic | THC +, Semi Qual |
|---|---|
| CPT Code | 80307 |
| Also Known As | Cannabis, Carboxy-THC, Hashish, Hemp, Marihuana, Marijuana, Mary Jane, Reefer, Tetrahydrocannabinol, THC, Weed |
| Specimen Type | Urine |
| Specimen Container | Plastic container w/ tightly fitting cap |
| Alternate Speciman Type | None |
| Preferred Volume | 1.0 mL |
| Minimum Volume | 0.5 mL |
| Specimen Collection | Routine voided urine collection |
| Specimen Process | Collect freshly voided urine in plastic containers |
| Specimen Transport Storage | Refrigerated |
| Specimen Stability | 7 days room temperature (18-30°C); 3 days refrigerated (2-8°C); 3 months frozen (-20°C or less) |
| Specimen Rejection | • Improperly labeled. • Incomplete information on the requisition. • Too old for processing. • Failure to meet volume criteria. • Leaking primary or secondary specimen container. • Wrong collection container for test ordered. • Gross contamination. • Improper storage |
| Methodology | Enzyme Immunoassay |
| Use | For the qualitative determination of cannabinoids in urine. |
| Clinical Signifigance | THC is rapidly absorbed and almost completely metabolized by inhalation or through the gastrointestinal tract. The major metabolites become detectable in plasma, feces and urine within hours after exposure. Passive inhalation of marijuana smoke can result in an elevation of urine THC concentration as high as 10-40 ng/mL. In chronic users, THC may accumulate in fatty tissue faster than it can be excreted. This leads to longer detection times in urine for chronic users than for occasional users. |
| Reference Range | <50 ng/mL is Negative |
| Day Run | Mon-Fri |
| Time Run | As Received |
| Time Reported | 3 days |
| Test Type | Tox |
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