Valproic Acid, Total and Free
Test code
CPT code(s)*
Test resources
Details
Methodology
Immunoassay (IA)
Alternative name(s)
Depakene®
Specimen requirements | |
|---|---|
| Patient preparation | Avoid contact of samples with plasticizers, varnishes, paint fumes, and fatty acids. Collect as trough just before next dose (optimum time to collect sample: 1 hour before next dose). |
| Preferred specimen(s) | 3 mL serum collected in a red-top tube (no gel) |
| Alternative specimen(s) | Plasma collected in: EDTA (lavender-top) tube |
| Minimum volume | 1.5 mL |
| Collection instructions | Do not use gel barrier tubes. Centrifuge and immediately separate serum or plasma specimens from the cells into clean transport tube. |
| Transport container | Transport tube |
| Transport temperature | Refrigerated (cold packs) |
| Specimen stability | Room temperature: 48 hours Refrigerated: 7 days Frozen: 30 days |
| Reject criteria | Serum separator tube (SST) |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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