Cannabinoids Confirmation, Urine (Sendout)
General Information
- Lab Name
- Cannabinoids Confirmation, Urine (Sendout)
- Lab Code
- RUTHC
- Epic Ordering
- Cannabinoids Confirmation, Urine (Sendout)
- External Test Id
- THCU
- Description
Useful For: Detection and confirmation of drug use of cannabis/marijuana in urine samples. This test identifies and quantifies delta-8-THC-COOH and delta-9-THC-COOH.
Ordering Guidance: Available as a reflex confirmation test only. Refer to Drug Testing for Chronic Prescription of Controlled Substances for available panels.
- References
- Mayo Clinical & Interpretive Information: Delta-8 and Delta-9-Carboxy-Tetrahydrocannabinol (THC) Confirmation, Random, Urine
- Synonyms
- Cannabinoids, Carboxy-THC Confirmation, Marijuana, Tetrahydrocannabinol, THC, THCU
- Components
-
Code Name RUD8TH Delta 8 Carboxy THC RUD9TH Delta 9 Carboxy THC RUTHCI Carboxy THC Interpretation
Interpretation
- Method
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
- Reference Range
- See individual components
- Ref. Range Notes
Reference Values: Not Detected
Cutoff Concentrations:
Delta-8 Carboxy-Tetrahydrocannabinol (THC): < 5.0 ng/mL Delta-9 Carboxy-Tetrahydrocannabinol (THC): < 5.0 ng/mL Interpretation:
The presence of delta-8 and/or delta-9 carboxy tetrahydrocannabinol (THC-COOH) in urine is a strong indicator that the patient has used cannabis/marijuana.
THC-COOH has a long half-life and can be detected in urine for more than 7 days after a single use.
Chronic use causes accumulation of THC and THC-COOH in adipose tissue, such that it is excreted into the urine for as long as 30 to 60 days from the time chronic use is halted.
- References
- Mayo Clinical & Interpretive Information: Delta-8 and Delta-9-Carboxy-Tetrahydrocannabinol (THC) Confirmation, Random, Urine
Ordering & Collection
- Specimen Type
- Urine
- Collection
-
Collect Random Urine in a preservative-free urine collection container.
- Handling Instructions
Outside Laboratories: Aliquot 0.5 to 3 mL urine into a separate plastic vial. Refrigerate urine.
Stability: Refrigerated (preferred): 14 days; Frozen: 14 days; Ambient: 72 hours.
Reject Due To: Gross icterus.
- Quantity
-
requested: 3 mL urine
minimum: 0.5 mL urine
Processing
- Processing
Aliquot 0.5 mL to 3 mL urine into a separate screw-cap vial. Refrigerate urine.
Sendouts:
- Order Mayo Test: THCU
- Interfaced: Yes [Interface: 601; Department: MARF]
Stability: Refrigerated (preferred): 14 days; Frozen: 14 days; Ambient: 72 hours.
Reject Due To: Gross icterus.
Performance
- LIS Dept Code
- Sendouts Mayo Lab (RF) (MARF)
- Performing Location(s)
-
Sendout Mayo Clinic Laboratories (Superior Drive)
800-533-17103050 Superior Drive NW
Rochester, MN 55901 - Frequency
- Performed: Monday through Friday. Report Available: 3-5 days from sample receipt at Mayo Clinic Labs.
- Available STAT?
- No
Billing & Coding
- CPT codes
- G0480
- LOINC
- 20521-1
- Interfaced Order Code
- UOW4700