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Test ID ETX Ethosuximide, Serum

Method Name

Enzyme-Multiplied Immunoassay Technique (EMIT)


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and the serum aliquoted into a plastic vial within 2 hours of collection.


Reporting Name

Ethosuximide, S

Specimen Type

Serum

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 14 days
  Frozen  28 days
  Ambient  14 days

Report Available

Same day/1 day

Performing Laboratory

Mayo Clinic Laboratories in Rochester

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ETX Ethosuximide, S 3616-0

 

Result ID Test Result Name Result LOINC Value
8769 Ethosuximide, S 3616-0

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-Therapeutics Test Request (T831)

-Neurology Specialty Testing Client Test Request (T732)

Useful For

Monitoring ethosuximide therapy

 

Determining compliance

 

Assessing ethosuximide toxicity

Day(s) Performed

Monday through Saturday

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

80168

Specimen Minimum Volume

0.25 mL

Reference Values

Therapeutic: 40-100 mcg/mL

Critical value: >150 mcg/mL