Cannabinoid (Marijuana) Screen, Blood
| Cannabinoid (Marijuana) Screen, Blood | | | |
| Number | | 767554 |
| CPT | | 80101 |
| Synonyms | | Cannabis ; Marijuana ; THC |
| Test Includes | | Delta-9-tetrahydrocannabinol (THC) and metabolite (carboxy THC). Confirmation is performed at an additional charge. |
| Special Instructions | | Chain-of-custody documentation is required for samples submitted for pre-employment, random employee testing, and forensic purposes. For other applications, use the standard request form. Please mark chain-of-custody test number on the request form. |
| Specimen | | Whole blood |
| Volume | | 12 mL |
| Minimum Volume | | 4 mL |
| Container | | Two gray-top 6 mL or three gray-top 4 mL (sodium fluoride/potassium oxalate) tubes (preservative in gray-top tubes is essential for cocaine analysis) |
| Collection | | Routine venipuncture. Mix blood by inversion after collection. Label tube with patient information. Seal stopper with tamper-evident tape after collection. |
| Storage Instructions | | Maintain specimen at room temperature unless arrival at the laboratory will extend beyond 7 days. If arrival extends beyond 7 days, then refrigerate. |
| Causes for Rejection | | Quantity not sufficient for analysis; improper specimen (serum, plasma, clotted blood); incomplete chain-of-custody documentation; incomplete specimen identification |
| Reference Interval | | Detectability: THC: 10 ng/mL |
| Use | | Drugs of abuse testing |
| Methodology | | Immunoassay |
|