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Lab Dept:
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Chemistry
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Test Name:
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ETHOSUXIMIDE LEVEL
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General Information
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Lab Order Codes:
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ZAR
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Synonyms:
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Zarontin®
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CPT Codes:
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80168 - Ethosuximide
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Test Includes:
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Ethosuximide level reported in mcg/mL.
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Logistics
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Test Indications:
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Monitoring therapy, determining compliance, assessing toxicity
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Lab Testing Sections:
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Chemistry - Sendouts
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Referred to:
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MedTox Laboratories (Test# 48)
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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1 day, test performed daily
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Special Instructions:
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Trough levels are most reproducible.
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Specimen
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Specimen Type:
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Blood
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Container:
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Red (plain, no gel) top tube
Alternate: Green top tube
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Draw Volume:
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3 mL (Minimum: 1.2 mL) blood
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Processed Volume:
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1 mL (Minimum: 0.4 mL) serum
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Collection:
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Routine venipuncture
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Special Processing:
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Lab Staff: Centrifuge specimen, remove plasma aliquot into a screw-capped round bottom plastic vial within 2 hours of draw. Store and ship at refrigerated temperatures. Forward promptly.
Minimum volumes may result in an elevated reporting limit and inability to repeat analysis.
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Patient Preparation:
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None
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Sample Rejection:
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Gross hemolysis; mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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Therapeutic range: 40 – 100 mcg/mL
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Toxic Values:
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> or = 150 mcg/mL
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Limitations:
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Minimum volumes may result in an elevated reporting limit and inability to repeat analysis. Reporting limit 1.0 mcg/mL.
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Methodology:
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Immunoassay Technique (IA)
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References:
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MedTox Laboratories July 2012
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Updates:
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3/4/2004: Test moved from Medtox to Mayo Medical Laboratories. Note: Change in upper therapeutic range from 100 to 75. Toxic range previously >150.
1/28/2010: Units changed from ug/mL to mcg/mL. Critical/Toxic value changed from ≥100 mcg/mL to >100 mcg/mL.
1/5/2011: Test moved from Mayo to MedTox. Toxic range previously listed >100 mcg/mL.
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