Test Overview
Test Methodology

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

Test Usage

Therapeutic drug monitoring.

Reference Range *

Flurazepam: 0 - 30 ng/mL, critical value 500 ng/mL; Desalkyflurazepam: 30 - 150 ng/mL, critical value 500 ng/mL; Flurazepam and Desalkyflurazepam: 30 - 180 ng/mL, critical value 1000 ng/mL.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Daily
Analytic Time

5 - 6 days

Soft Order Code
FFLUR
MiChart Code
Flurazepam Level
Synonyms
  • FFLURZ
  • FLURAZEPAM, DESALKYLFLURAZEPAM
  • Dalmane
Laboratory
Sendout
Reference Laboratory
Mayo FFLUR (90091) (MedTox 53)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in a red top or green top tube. Centrifuge, aliquot serum or plasma into a plastic vial and freeze.

Normal Volume
2 mL serum or plasma
Minimum Volume
0.5 mL serum or plasma
Additional Information

Test sent to Mayo Medical Laboratories; performed by MedTox Laboratories.

Billing
CPT Code
80346
Fee Code
22021
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