Clobazam, Serum or Plasma

TEST: 790500
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CPT: 80299
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Synonyms

  • Onfi®

Test Includes

Clobazam; desmethylclobazam

Expected Turnaround Time

4 - 10 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Serum or plasma

Volume

1 mL

Minimum Volume

0.5 mL

Container

Red-top tube or green-top (heparin) tube. Gel-barrier tubes are not recommended.

Collection

Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen. Specimen is stable for nine days at room temperature, refrigerated, and frozen.

Patient Preparation

Trough levels are most reproducible.

Causes for Rejection

Gel-barrier tubes

Test Details

Use

Therapeutic drug management

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Reference Interval

Clobazam: 30−300 ng/mL; Desmethylclobazam: 300−3000 ng/mL

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
790500 Clobazam (ONFI) 79408-1 790534 Clobazam ng/mL 3487-6
790500 Clobazam (ONFI) 79408-1 790535 Desmethylclobazam ng/mL 35107-2

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