Barbiturates, Serum or Plasma, Quantitative
Also known as: BARBS SP
Use
This test is used to optimize dosing and monitor patient adherence to barbiturate therapy. It is useful for ruling out barbiturate exposure. For follow-up testing of a presumptive result, the preferred test is Barbiturates, Urine, Quantitative (2012213).
Special Instructions
Not provided.
Limitations
The absence of expected drug(s) and/or drug metabolite(s) may indicate noncompliance, inappropriate timing of specimen collection relative to drug administration, poor drug absorption, or limitations of testing. The concentration value must be greater than or equal to the cutoff to be reported as positive.
New York Approved
Methodology
Mass Spectrometry
Biomarkers
Butalbital
AnalytePentobarbital
AnalytePhenobarbital
Analyte
LOINC Codes
- 3948-7 - Phenobarb SerPl-mCnc
- 6895-7 - Butalbital SerPl-mCnc
- 3924-8 - Pentobarb SerPl-mCnc
Result Turnaround Time
1-7 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
3.5 mL
Minimum Volume
1.5 mL
Container
ARUP standard transport tube
Collection Instructions
Separate serum or plasma from cells ASAP or within 2 hours of collection.
Causes for Rejection
Separator tubes. Plasma or whole blood collected in light blue (sodium citrate). Specimens exposed to repeated freeze/thaw cycles. Hemolyzed specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 week |
| Refrigerated | 2 weeks |
| Frozen | 3 years |
Other tests from different labs that may be relevant