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Epic Test Code LAB24 Valproic Acid

Performing Location(s)

BMC

Synonyms

Depakene

Depakote

Specimen Type

Serum

Preferred Container

Red top tube

Blood Tube Draw Volume

Min 50% draw volume  

Minumum Volume to Submit for Testing

0.5 mL Serum 

  • Multiple test can be performed from this volume. For question please contact the lab at 547-3975.  

Storage Requirements

Sample tubes should be centrifuged within 2 hours of collection 

Aliquot Red tops

See Causes of Rejection for temperature requirements.

Transportation Needs

 Deliver specimen to laboratory within 1 hour of collection if unspun. If not possible see "storage Requirements". 

Causes for Rejection

Mislabeled or unlabeled specimen
Less than 50% draw for Vacutainer tubes

Anything other than a red-top tube

> 7 days refrigerated 
> 24 hours room temperature
> 1 year frozen
Hemolysis > 800 mg/dL HgB
Lipemia > 750 mg/dL Trig
Bilirubin > 30 mg/dL Bili

 

Reference Values

Population Units Therapeutic Range High Critical Value
All populations ug/mL 50-100 >125

 

Available STAT

Yes

Days of Analysis

All

Additional Information

Collection Guideline:

Collect after steady state conditions are reach, i.e. after 4-5 half-lives on unchanged dose regimen Collect samples following oral dosing immediately prior to next dose for drugs with short half lives. For drugs with long half-lives, ≥24 hours, draw time is less critical.
Obtain samples following IV dosing of phenytoin at 1-4 hours post dose.
After administration of fosphenytoin, collect specimens 2 hours post IV or 4 hours post IM dose.
Collect within 6 hours after a seizure in previously controlled patient.

Methodology

Beckman AU/Dx Series

CPT Code

80164

Last Updated

19-DEC-24 MS