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HelpTest Code OXAZS Oxazepam, Serum
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Red top (Serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Secondary ID
623016Useful For
Assessing compliance
Monitoring for appropriate therapeutic level
Assessing oxazepam toxicity
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Specimen Type
Serum RedSpecimen Minimum Volume
0.3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum Red | Refrigerated (preferred) | 28 days |
| Ambient | 28 days | |
| Frozen | 28 days |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Reference Values
Therapeutic concentrations
Oxazepam: 200-1500 ng/mL
Cutoff concentrations by liquid chromatography tandem mass spectrometry:
Oxazepam: 10 ng/mL
Interpretation
Suggested therapeutic serum concentrations have been reported for oxazepam between 200 and 1500 ng/mL.
Method Description
The internal standard mixture containing chlordiazepoxide-d5, diazepam-d5, nordiazepam-d5, oxazepam-d5, and temazepam-d5 is added to serum samples, mixed and centrifuged. The supernatant is diluted and injected on a liquid chromatography tandem mass spectrometer.(Unpublished Mayo method)
Day(s) Performed
Monday, Wednesday
Report Available
3 to 7 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80299
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| OXAZS | Oxazepam, S | 3886-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 623016 | Oxazepam | 3886-9 |