THC, URINE, CLINICAL, GC/MS CONFIRMATION (QUANTITATIVE)

Components
Also see Drug Abuse Screen, Urine Panels with GC/MS confirmations. GC/MS confirmation for 11-nor-9-carboxy-delta-9-THC. Includes a urine creatinine and ratio of THC metabolite to creatinine. This ratio is the best indicator of continued drug use when compared to previous values on the same patient.

Specimen Required
Collect random urine. Mix well and send 20.0 mL urine (6.0 mL minimum) refrigerated in a screw-capped plastic urine container.

Rejection Criteria
Urine catheter cup (with needle)

Methodology
Gas Chromatography/Mass Spectrometry

Stability
Room Temperature: 48 hours; Refrigerated: 14 days; Frozen: 14 days

Reference Range
Decision Level: 3 ng/mL

Performed
Monday-Friday

Turnaround Time1-2 days
Test CodeUCTHC
CPT-4 Code (s)
80349 (G0480)
LOINC Codes
THC (Cannabis):   20521-1  
THC/CR Ratio:   13478-3  
Creatinine:   2161-8  
Adulterant:   58715-4  

Warde
Medical
Laboratory