Biomarker Lens

Common biomarkers

  • Hemoglobin
  • Glucose
  • ALT
  • Apolipoprotein B
  • C-Reactive Protein, Cardiac
  • Ferritin
  • Alb/Creat Ratio, Urine
  • Alkaline Phosphatase
  • FSH
  • T4,Free(Direct)

Biomarkers · Chemical

Free Valproic Acid (Depakote)

Primary unit
ug/mL
LOINC codes
4087-3
Tests that measure Free Valproic Acid (Depakote)
Labcorp 2, Quest Diagnostics 2

Tests

Check the catalog code, specimen, method and preparation for every test that measures Free Valproic Acid (Depakote). Select up to five tests to compare them side by side.

Labcorp 2 tests

Single-analyte tests

  • Valproic Acid, Free, Serum or Plasma 070789

    Serum · Fasting not stated · Turnaround 2 - 4 days

    Method and collection
    Method
    Ultrafiltrate assayed by Immunoassay (IA)
    Collection
    Transfer separated serum or plasma to a plastic transport tube.
    Reference notes
    Therapeutic: 6.0-22.0 μg/mL
    Labcorp catalog page

Panels that include this biomarker

  • Valproic Acid (Total+Free) 706499

    2 analytes · Serum · Fasting not stated · Turnaround 3 - 5 days

    Method and collection
    Method
    Immunoassay
    Collection
    Oral: peak: 1 to 4 hours after dose (influenced by meals); trough: immediately prior to next dose (possibly more useful than peak values).
    Labcorp catalog page

Quest Diagnostics 2 tests

Single-analyte tests

  • Valproic Acid, Free 3314

    Serum · Fasting not stated · Turnaround Set up: Mon-Sat

    Method and collection
    Method
    Immunoassay (IA)
    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).
    Collection
    Do not use gel barrier tubes. Centrifuge and immediately separate serum or plasma specimens from the cells into clean transport tube.
    Reference notes
    4.8-17.3 mg/L
    Quest Diagnostics catalog page

Panels that include this biomarker

  • Valproic Acid, Total and Free 6651

    2 analytes · Serum · Fasting not stated

    Method and collection
    Method
    Immunoassay (IA)
    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).
    Collection
    Do not use gel barrier tubes. Centrifuge and immediately separate serum or plasma specimens from the cells into clean transport tube.
    Reference notes
    See Laboratory Report
    Quest Diagnostics catalog page

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Sources

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

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