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Test Code BARBU Barbiturates Confirmation, Urine

Additional Codes

MLAB: YBARBU

Powerchart: Barbiturates Confirmation

Epic: order via LIS

Reporting Name

Barbiturates Confirmation, U

Useful For

Detecting drug abuse involving barbiturates such as amobarbital, butalbital, pentobarbital, phenobarbital, and secobarbital

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Urine


Specimen Required


Container/Tube: Plastic, 60-mL urine bottle

Specimen Volume: 20 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

Additional Information:

1. No specimen substitutions.

2. No STATS are accepted for this procedure.

3. For situations where chain of custody is required, a Chain-of-Custody Kit (T282) is available. For chain-of-custody testing, order BARBX / Barbiturates Confirmation, Chain of Custody, Urine.

4. Additional drug panels and specific requests are available. Call Mayo Medical Laboratories at 800-533-1710 or 507-266-5700.

5. If urine creatinine is required or adulteration of the sample is suspected, the following test should be requested, ADULT / Adulterants Survey, Urine. For additional information, please refer to ADULT / Adulterants Survey, Urine.

6. Submitting less than 20 mL will compromise our ability to perform all necessary testing.

Forms: Chain-of-Custody Request Form is included in the Chain-of-Custody Kit (T282). A copy of this form is also available at http://www.mayomedicallaboratories.com/it-mmfiles/chain-of-custody-request-form.pdf.


Specimen Minimum Volume

5 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  72 hours

Reference Values

Negative

 

Cutoff concentrations:

BUTALBITAL BY GC-MS

<100 ng/mL

 

AMOBARBITAL BY GC-MS

<100 ng/mL

 

PENTOBARBITAL BY GC-MS

<100 ng/mL

 

SECOBARBITAL BY GC-MS

<100 ng/mL

 

PHENOBARBITAL BY GC-MS

<100 ng/mL

Day(s) and Time(s) Performed

Monday through Thursday, Sunday

Test Classification

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

CPT Code Information

80345

G0480 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
BARBU Barbiturates Confirmation, U In Process

 

Result ID Test Result Name Result LOINC Value
21442 Butalbital-by GC/MS 16237-0
20642 Amobarbital-by GC/MS 16239-6
20643 Pentobarbital-by GC/MS 16240-4
20644 Secobarbital-by GC/MS 16238-8
20645 Phenobarbital-by GC/MS 16241-2
20651 Barbiturates Interpretation 69050-3
20647 Chain of Custody No LOINC Needed

Reject Due To

Hemolysis

Mild OK; Gross OK

Lipemia

NA

Icterus

Mild OK; Gross OK

Other

NA

Method Name

Gas Chromatography-Mass Spectrometry (GC-MS) Confirmation with Quantitation