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Benzodiazepines Screen, Urine

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Screen: Kinetic Interaction of Microparticles in Solution (KIMS) 

 

Testing Algorithm:

Samples containing greater than 100 ng/mL of nordiazepam or other cross-reacting substances are reported as screen positive, presumptive.  Results are presumptive for medical purposes only.

 

Literature Reference:

Benzodiazepines ll (BNZ2) package insert, Roche Diagnostics

Specimen Requirements

Specimen Type: Urine, random

Container/Tube: Yellow-top urine collection tube or plain red-top tube (full)

Specimen Volume: 10 mL

Collection Instructions: No additive.

Additional Information: See Urine Collection in Special Instructions for additional information.

 

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: Screening result available 1 hour after receipt in laboratory.
Routine: Screening result available 3 hours after receipt in laboratory.

Test Classification and CPT Coding

80307-Drug screen

Reference Values

Not detected
Benzodiazepines confirmation available by request only, at an addition charge.  Performed by Mayo Medical Laboratories. 

Immunoassay screen cut-off level: 100 ng/mL.
Note: Drug results are to be used only for medical purposes. All results, especially unconfirmed screening results, must not be used for non medical purposes.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only
Analyte Stability:  

  • Processed sample stability:
    • Ambient - 2 days
    • Refrigerator (2-8°C) - 7 days
    • Frozen (≤-20°C) - 7 days
  • See Analyte Stabiltiy Chart under General Information for a complete list.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000. Completed specimens are stored refrigerated for 5 days.

Special Instructions

LOINC Code Information

Name LOINC Code
Benzodiazepines Screen, Urine 14316-4