Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

BENZODIAZEPINE CONFIRMATION, URINE

General Information

Lab Order Codes:

BECON

Synonyms:

Diazepam; desmethyldiazepam; oxazepam; temazepam; alprazolam; alpha-hydroxyalprazolam

CPT Codes:

82542 - Column chromatography/mass spectrometry, analyte not elsewhere specified; quantative single stationary and mobile phase

Test Includes:

Confirmation testing for benzodiazepines at the care provider's request based on a positive screening found during Drugs of Abuse, Urine testing.

Logistics

Test Indications:

Confirmation of positive screening test.

Lab Testing Sections:

Chemistry - Sendouts

Referred to:

MedTox Laboratories (Test: 20396)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 day or 4 hours, Stat

Special Instructions:

N/A

Specimen

Specimen Type:

Urine

Container:

Urine cup

Draw Volume:

10 mL (Minimum: 1 mL) urine

Note: Submission of the minimum volume results in an elevated reporting limit and inability to repeat analysis.

Processed Volume:

Same as Draw Volume

Collection:

Random urine

Special Processing:

Lab Staff: No preservative. Refrigerate specimen after collection. Centrifuge specimens containing particulates.

Patient Preparation:

None

Sample Rejection:

Unlabeled specimen or mislabeled specimen

Interpretive

Reference Range:

Negative

Critical Values:

N/A

Limitations:

Drugs Confirmation Threshold: desmethyldiazepam, oxazepam, temazepam and lorazepam 300 ng/mL; alprazolam and metabolite (alpha-hydroxyalprazolam) 100 ng/mL

Methodology:

Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

References:

MedTox Laboratories Web Page March 2009

Updates:

3/31/2009: 3/31/2009: CPT update, previously listed as 80102. Volume certification from MedTox (Noelle/Beth) for pediatric minimum.
5/6/2010: CPT update, previously listed as 82541.



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