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Valproic acid, free-6359

Test info

Test name:

Valproic acid, free

Test number:

6359

Excellian order number:

80164.2

Abbreviation:

VAF

Alternate names:

Depakote
Depakene
Valproic acid, unbound

Specimen

Specimen type:

Lithium heparin (Li hep) plasma

Collection container:

Lt green plasma separator (PST)

Volume:

1.0 mL

Minimum volume:

0.5 mL

Collection instructions:

Immediately following collection, mix sample thoroughly by gentle inverting 8 - 10 times to prevent clotting

Processing instructions:

Spin within two (2) hours of sample collection

Transport container:

Lt green plasma separator (PST)

Alternate specimen type:

Serum

Alternate collection container:

Gold serum separator (SST) tube

Red serum vial/tube - 4 mL

Alternate collection instructions:

Immediately following collection, thoroughly mix sample by gently inverting 5 times

Alternate processing instructions:

Allow serum sample to clot for a minimum of 30 minutes
Spin within two (2) hours of sample collection

Alternate transport container:

Gold serum separator (SST) tube

False bottom plasma/serum transport vial/tube (AHL)

Transport and stability:

Refrigerated (preferred) - 7 days

Ambient - 2 days

Frozen - 3 months

Reason for rejection:

Improper labels (unlabeled or mislabeled)
Hemolysis (some procedures)
Improper anticoagulant or ratio
Delay in transport
Improper storage temperature affecting results
Inappropriate timing of collection
Improper container
Leaking container resulting in compromised specimen
Quantity not sufficient (QNS)

Performance

Performing lab:

AHL - Chemistry: C

Days set up:

Daily

TAT:

1 day

Method:

Homogeneous enzyme immunoassay

Clinical and Interpretive info

Reference ranges:

6.0 - 20.0 µg/mL

Results that require action (critical):

>40 µg/mL

If total valproic acid is >150 μg/mL, no call

Billing

CPT codes:

80165

Tracking

Date created:

11/30/2001

Revised date:

12/26/2022

Review date:

01/05/2024