Ethosuximide, Serum or Plasma ETHOSX
| Method(s) | Quantitative Enzyme Immunoassay |
|---|---|
| Specimen Required | |
| Collect | One 5 mL plain red top tube. Also acceptable: lavender (K2 or K3 EDTA) or pink (K2EDTA). |
| Transport | Separate serum or plasma from cells as soon as possible or within 2 hours of collection. Transfer 1 mL serum or plasma refrigerated (Min: 0.5 mL). |
| Remarks | Patient preparation: Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration. |
| Stability | After separation from cells: Ambient: 5 days; Refrigerated: 1 week; Frozen: 2 months |
| Unacceptable Conditions | Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution). |
| Schedule | Daily |
| Billing Code | 5011991 |
| CPTCode | 80168 |
| Preferred Specimen Collection Device(s) | |
| Reference Interval | |
|
Ethosuximide: 40-100 ug/mL Toxic: Greater than 150 ug/mL |
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