Ethosuximide
Ordering Info & Methodology
Test Code
Cerner Synonyms
ESUXB
ZARONTIN; EMESIDE
Turn Around Time
Methodology
3 days when received Sunday - Thursday.
Non-Sunquest sites: refer to Collection and Shipping Requirements
Liquid chromatography mass spectrometry
Ordering Guide
ESUXB
Specimen Requirements
Sample Type
Collection Container
Alternate Collection Containers
Serum
Red
N/A
150 uL
1 day at Room Temp, 5 days at 2-8°C
Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.
Minimum Volume
Add On Stability
Collection and Shipping Requirements
Aliquot serum into a secondary tube. Refrigerate and send on ice pack.
Include Date and Time of last dose on requisition.
For non-Sunquest sites: To avoid processing delays, send samples in a biohazard bag separate from other samples in the same shipment. Place requisition in the pocket on the outside of the bag. Identify the bag with a yellow sticker or a note on yellow paper (in pocket with requisition) stating "Priority: Therapeutic Drug Monitoring."
Reference Intervals
Female Reference Interval
Age Category | Reference Interval | units |
|---|---|---|
≥0y | 280 - 710 | umol/L |
Male Reference Interval
Age Category | Reference Interval | units |
|---|---|---|
≥0y | 280 - 710 | umol/L |
Additional Notes
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Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.
Example
Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.
Measurement Uncertainty
Ward should record information on dosage, date/time of last dose, and other meds. Therapeutic drug monitoring specimens must be drawn at trough.