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Ethosuximide [214X]
Test CodeQ3852
Preferred Specimen
1 mL serum (0.5 mL minimum)
Alternate specimen: 1 mL plasma (0.5 mL minimum)
Alternate specimen: 1 mL plasma (0.5 mL minimum)
Patient Preparation
Collect as a trough just prior to next dose
Minimum Volume
0.5 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube or sodium heparin (green-top) tube
Transport Container
No additive (red-top)
Alternate specimen: EDTA (lavender-top)
Alternate specimen: EDTA (lavender-top)
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 14 days
Frozen: 35 days
Refrigerated: 14 days
Frozen: 35 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gel barrier/Serum separator tube (SST)
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Mon-Sat; Report available: Daily
Clinical Significance
Ethosuximide is an anticonvulsant used to treat seizures. Ethosuximide levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.
