Sign in →

Test Code VALPA Valproic Acid, Total, Serum

Useful For

Monitoring total valproic acid in therapy

 

Assessing compliance

 

Evaluating potential toxicity

Method Name

Immunoassay

Reporting Name

Valproic Acid, Tot, S

Specimen Type

Serum


Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and serum aliquoted into a plastic vial within 2 hours of collection.


Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 14 days
  Frozen  28 days
  Ambient  72 hours

Reference Values

Therapeutic: 50 (trough)-125 (peak) mcg/mL

Critical value: ≥151 mcg/mL

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

80164

LOINC Code Information

Test ID Test Order Name Order LOINC Value
VALPA Valproic Acid, Tot, S 4086-5

 

Result ID Test Result Name Result LOINC Value
VALPA Valproic Acid, Tot, S 4086-5

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-Neurology Specialty Testing Client Test Request (T732)

-Therapeutics Test Request (T831)