THC
Label Mnemonic: | THCU |
Epic code: | LAB5203 |
Order form: | Laboratory Requisition |
Supply order: | Supply Order Form |
Billing: | Billing Policies |
CPT code: | 80349 |
Specimen(s):
Urine Screen, Random
Alternate
Collection Media:
Urine (Random)-BD Vacutainer®, no additive yellow top
Minimum:
5 mL random urine
Rejection Criteria:
Test cannot be added to a urine sample previously utilized for
urinalysis testing (LAB1160, LAB1164, LAB8379).
Testing
Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around
Time:
1 hour (upon receipt in laboratory)
Reference Range:
None
Interpretive Data:
Drug of abuse screening tests are to be used
for medical purposes only and not for non-medical purposes (e.g.,
employee, competitive athlete, or forensic testing).
Comments:
Screen includes THC with a cutoff of 50 ng/mL for the main metabolite of THC (9-carboxy-THC). If confirmation is needed for THC, call UIDL Client Services at 1-866-844-2522. Allow up to seven days for confirmatory results. Confirmation is at an additional charge. It is highly unlikely that passive (second-hand) inhalation of marijuana smoke will result in a positive screening test. Research studies have shown that maximum urinary concentrations of 9-carboxy- THC levels only reach 15-20 ng/mL following passive inhalation of heavy marijuana smoke. References: Cone EJ, Johnson RE, Darwin WD, Yousefnejad D, Mell LD, Paul BD, Mitchell J. Passive inhalation of marijuana smoke: urinarlysis and room air levels of delta-9-tetrahydrocannabinol. J Anal Toxicol 1987;11:89-96. Hammett-Stabler CA, Pesce AJ, Cannon DJ. Urine Drug Screening in the Medical Setting. Clinica Chimica Acta 2002;315:125-135.
Test
Limitations:
There is the possibility that other substances and/or factors may
interfere with the test and cause erroneous results (e.g., technical
or procedural errors). Call the lab at 319-356-3527 for additional
information.
Methodology:
Assay is based on the kinetic interaction of microparticles in a
solution (KIMS) as measured by changes in light transmission.
Sample
Processing:
Submit urine in leak-proof plastic container.
Label transport tube with two patient identifiers, date and time of collection.
Label transport tube with two patient identifiers, date and time of collection.
Sample
Storage:
Refrigerate.
Transport
Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal bag.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
CPT Code:
80349
See also:
Drugs of Abuse, Urine
Drugs of Abuse, Urine + Confirm
THC, Urine Screen + Reflexed Confirmation, Random
Drugs of Abuse, Urine
Drugs of Abuse, Urine + Confirm
THC, Urine Screen + Reflexed Confirmation, Random