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HelpTest Code BUTAS Butalbital, Serum
Reporting Name
Butalbital, SUseful For
Monitoring butalbital therapy
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Serum RedSpecimen 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: 1.5 mL
Collection Instructions:
1. Draw blood immediately before the next scheduled dose.
2. Within 2 hours of collection centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
0.6 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum Red | Refrigerated (preferred) | 28 days |
| Ambient | 28 days | |
| Frozen | 28 days |
Reference Values
Peak concentrations (100 mg single oral dose):
1.7-2.6 at 2 hours
1.3-1.7 at 24 hours
Toxic concentration: ≥10 mcg/mL
Cutoff concentrations by gas chromatography mass spectrometry:
Butalbital: 0.5 ng/mL
Day(s) Performed
Thursday
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
80299
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| BUTAS | Butalbital, S | 6895-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 8427 | Butalbital, S | 6895-7 |
Report Available
3 to 9 daysMethod Name
Gas Chromatography-Mass Spectrometry (GC-MS)
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.