Trimethadione and Metabolite Level

Tridione^®

Test Codes

Order as a Miscellaneous Send Out, EPIC: XMISC, NMS: 4700

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.

Also acceptable: Two Lavender-top EDTA tubes.

Do not use Serum Separator Tubes.
Time of Collection: Trough, just prior to the next dose.

Physician Office/Draw Specimen Preparation

Centrifuge to separate serum or plasma from cells. Transfer serum or plasma to a plastic transport tube and freeze (-20°C/-4°F or below).

Preparation for Courier Transport

Transport: 2.0 mL serum or plasma, frozen (-20°C/-4°F or below). (Minimum: 0.7 mL)

Rejection Criteria

• Serum Separator (SST) tubes.
• Specimens not collected and processed as indicated.  

In-Lab Processing

Centrifuge to separate serum or plasma from cells. Transfer serum or plasma to a plastic transport tube and freeze (-20°C/-4°F or below).

Transport: 2.0 mL serum or plasma, frozen (-20°C/-4°F or below). (Minimum: 0.7 mL)

Storage

Specimen Stability for Testing:

Room temperature (20-26°C or 68-78.8°F): Undetermined
Refrigerated (2-8°C or 36-46°F): Undetermined
Frozen (-20°C/-4°F or below): 4 months

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions. 

Laboratory

Sent to ARUP Laboratories, Salt Lake City, UT, forwarded to National Medical Services (NMS), Willow Grove, PA.

Performed

Monday.
Results available in 4-11 days.

Reference Range

By report.

Test Methodology

Gas Chromatography.

CPT Codes

80339

Contacts

Last Updated

1/8/2025