2 - 4 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Serum or plasma
Red-top tube or lavender-top (EDTA) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.
Transfer separated serum or plasma to a plastic transport tube.
Gel-barrier tube; hemolysis; serum or plasma not removed from cells
Since valproic acid is highly bound, drugs that compete for protein binding sites can increase the amount of free valproic acid (biologically active protein); these include dicumarol, high dose salicylates, and phenylbutazone. If toxicity is suspected, a free valproic acid level should be obtained.
Ultrafiltrate assayed by liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Therapeutic: 6.0-22.0 μg/mL
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|070789||Free Valproic Acid (Depakote)||4087-3||070790||Free Valproic Acid (Depakote)||ug/mL||4087-3|
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