Sign in →

Epic Test Code LAB24 Valproic Acid

Performing Location(s)

BMC

Synonyms

Depakene

Depakote

Specimen Type

Serum or Plasma

Preferred Container

Gold or Red top tube

Alternate Container

Green top tube

Blood Tube Draw Volume

Min 50% draw volume  

Minumum Volume to Submit for Testing

0.5 mL Serum or Plasma

  • 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 

Gold tops are stable in original tubes for 48 hours DO NOT ALIQUOT

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

>48 hours in gold top
> 7 days refrigerated 
> 24 hours room temperature
> 6 months 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

26-OCT-24 MS