Drug Confirmation Barbiturates, Urine (Sendout)

General Information

Lab Name

Drug Confrm Barbiturates, URN

Lab Code

RUBRBC

Epic Name

Drug Confirmation Barbiturates, Urine (Sendout)

External Test Id

BARBU

Description

Useful For: Detecting drug abuse involving barbiturates such as amobarbital, butalbital, pentobarbital, phenobarbital, and secobarbital.

Ordering Guidance: Available as a reflex confirmation test only. Refer to Drug Testing for Chronic Prescription of Controlled Substances for available panels.

References

Mayo Clinical & Interpretive Information: Barbiturates Confirmation, Random, Urine

Synonyms

BABRU, Barbiturates Confirmation Urine - Add-on only

Components

Code	Name
RUCBB	Butalbital by GC/MS
RUCBA	Amobarbital by GC/MS
RUCBPN	Pentobarbital by GC/MS
RUCBS	Secobarbital by GC/MS
RUCBPH	Phenobarbital by GC/MS
RUCBI	Barbiturate Interpretation

Interpretation

Method

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

Reference Range

See individual components

Ref. Range Notes

Cutoff Screen Confirmations:

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

Interpretation:

The presence of a barbiturate in urine indicates use of one of these drugs.

Most of the barbiturates are fast acting; their presence indicates use within the past 3 days.

Phenobarbital, commonly used to control epilepsy, has a very long half-life. The presence of phenobarbital in urine indicates that the patient has used the drug sometime within the past 30 days.

References

Mayo Clinical & Interpretive Information: Barbiturates Confirmation, Random, Urine

Ordering & Collection

Specimen Type: Urine
Collection: Collect Random Urine in a preservative-free urine collection container.
Handling Instructions: Outside Laboratories: Aliquot 5-10 mL urine into a screw-cap vial and refrigerate.

Stability: Refrigerated (preferred): 14 days; Frozen: 14 days; Ambient: 72 hours.
Quantity: Requested: 10 mL urine
Minimum: 5 mL urine

Processing

Receiving Instructions

Aliquot 5-10 mL urine into a screw-cap vial and refrigerate.

Sendouts:

Order Mayo Test: BARBU
Interfaced: Yes [Interface 601: Department: MARF]

Stability: Refrigerated (preferred): 14 days; Frozen: 14 days; Ambient: 72 hours.

Misc Sendout

Performance

Lab Department

Sendouts Mayo Lab (RF)(MARF)

Frequency

Performed: Tuesday, Thursday, Sunday. Report Available: 3-5 days from sample receipt at Mayo Clinic Labs.

Available STAT?

Performing Location(s)

Sendout	Mayo Clinic Laboratories 800-533-1710 200 First Street Southwest Rochester, MN 55901

Billing & Coding

CPT Codes: G0480
LOINC: 20411-5
Interfaced Order Code: UOW1757