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HelpTest Code LAB686 Felbamate (Felbatol), Serum
Additional Codes
FELBA
Useful For
Determining whether a poor therapeutic response is attributable to noncompliance or lack of drug effectiveness
Monitoring changes in serum concentrations resulting from interactions with coadministered drugs such as barbiturates and phenytoin
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Supplies: Sarstedt Aliquot Tube 5 mL (T914)
Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Draw blood immediately before next scheduled dose.
2. Within 2 hours of collection, centrifuge the specimen.
3. For red-top tubes, immediately aliquot serum into a plastic vial.
4. For serum-gel tubes, aliquot serum into a plastic vial within 24 hours of collection.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 28 days | |
| Ambient | 28 days | ||
| Frozen | 28 days |
Reference Values
30.0-80.0 mcg/mL
CPT Code Information
80167
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FELBA | Felbamate (Felbatol), S | 6899-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 80782 | Felbamate (Felbatol), S | 6899-9 |
Interpretation
Optimal response to felbamate is associated with serum concentrations of 30 mcg/mL to 80 mcg/mL.
Toxic serum concentrations for felbamate have been established at concentrations greater than 100 mcg/mL.
Report Available
Same day/1 to 3 daysSpecimen Retention Time
14 daysReject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Day(s) Performed
Monday, Wednesday, Friday
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Neurology Specialty Testing Client Test Request (T732)
-Therapeutics Test Request (T831)
Method Description
Samples are diluted and extracted online by high turbulence liquid chromatography with detection by tandem mass spectrometry.(Unpublished Mayo method)