Lab Test

Clobazam and N-Desmethylclobazam Metabolite

Onfi, Frisium, Urbanyl

Test Codes

Mayo: CLOBZ, EPIC: LAB­­­­­7155, Beaker: XCLOL

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.

Do not use Serum Separator Tubes.
Time of Collection: 
Trough, just prior to the next dose.

Physician Office/Draw Specimen Preparation

Centrifuge to separate serum from cells within 2 hours of collection. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 0.5 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.4 mL)

Rejection Criteria

  • Serum Separator (SST) tubes.
  • Specimens not collected and processed as indicated.

In-Lab Processing

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 28 days
Refrigerated (2-8°C or 36-46°F): 28 days
Frozen (-20°C/-4°F or below): 28 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

 

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 3 days
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 2 months (avoid repeat freeze/thaw cycles)

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Clinic Laboratories in Rochester, MN.

Performed

Monday – Friday
Results available in 2-6 days.

Reference Range

By report.

Test Methodology

Quantitative High Performance Liquid Chromatography/Tandem Mass Spectrometry.

Interpretation

By report.

CPT Codes

80339 (alternate code: G0480).
LOINC:  35107-2, 35107-2

Contacts

Last Updated

7/19/2021

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