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Test Code COKEX Cocaine and Metabolite Confirmation, Chain of Custody, Random, Urine

Useful For

Detecting and confirming drug abuse involving cocaine

 

Chain of custody is required whenever the results of testing could be used in a court of law. Its purpose is to protect the rights of the individual contributing the specimen by demonstrating that it was always under the control of personnel involved with testing the specimen; this control implies that the opportunity for specimen tampering would be limited.

 

This test is not intended for use in employment-related testing.

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.

Reporting Name

Cocaine and metabolite Conf, CoC, U

Specimen Type

Urine


Ordering 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 Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  72 hours

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

Negative

Positives are reported with a quantitative gas chromatography mass spectrometry result.

Cutoff concentrations:

 

IMMUNOASSAY SCREEN

<150 ng/mL

 

Cocaine by GC-MS

<50 ng/mL

 

Benzoylecgonine by GC-MS

<50 ng/mL

Day(s) Performed

Monday through Friday

Report Available

2 to 5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

80353

G0480 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
COKEX Cocaine and metabolite Conf, CoC, U 53747-2

 

Result ID Test Result Name Result LOINC Value
2903 Cocaine Immunoassay Screen 42241-0
36162 Cocaine-by GC/MS 20519-5
36163 Benzoylecgonine-by GC/MS 16226-3
36164 Cocaine Interpretation 69050-3
36165 Chain of Custody 77202-0

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.

Secondary ID

62719