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HelpTest Code COKEX Cocaine and Metabolite Confirmation, Chain of Custody, Random, Urine
Additional Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| COCH | Chain of Custody Processing | No | Yes |
| ADLTX | Adulterants Survey, CoC, U | Yes | Yes |
Testing Algorithm
Adulterants testing will be performed on all chain-of-custody urine samples as per regulatory requirements.
Specimen Type
UrineOrdering Guidance
This test is for situations that require the chain-of-custody process. For testing not requiring chain of custody, order COKEU / Cocaine and Metabolite Confirmation, Random, Urine.
Specimen Required
Supplies: Chain of Custody Kit (T282)
Container/Tube: Chain of custody kit containing the specimen containers, seals, and documentation required.
Specimen Volume: 10 mL
Collection Instructions: Collect specimen in the container provided, seal, and submit with the associated documentation to satisfy the legal requirements for chain-of-custody testing.
Additional Information: Submitting less than 10 mL will compromise the ability to perform all necessary testing.
Specimen Minimum Volume
5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 14 days | |
| Ambient | 72 hours |
Reject Due To
| Gross hemolysis | OK |
| Gross icterus | OK |
Clinical Information
Cocaine is a drug of current health concern because of its proliferation among recreational drug abusers.
Freebase and crack increase the potential for major cocaine toxicity. Cocaine use is declining across the nation according to the National Institute of Drug Abuse.
Increasingly, laboratory results are disputed or there are medical/legal overtones. Therefore, physicians are finding an increased need to confirm positive results before informing or confronting the patients.
Chain of custody is a record of the disposition of a specimen to document all personnel who collected, handled, and performed the analysis. When a specimen is submitted in this manner, analysis will be performed in such a way that it will withstand regular court scrutiny.
Reference Values
Negative
Positive results are reported with a quantitative result.
Cutoff concentrations:
Immunoassay screen: 150 ng/mL
Gas chromatography mass spectrometry:
Cocaine: 50 ng/mL
Benzoylecgonine: 50 ng/mL
Day(s) Performed
Monday through Friday
Report Available
2 to 5 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80353
G0480 (if appropriate)
Method Name
Immunoassay/Gas Chromatography Mass Spectrometry (GC-MS)
Forms
1. Chain of Custody Request is included in the Chain of Custody Kit (T282).
2. If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.