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Test Code LAB24 Valproic Acid (Depakote)

Department

CHEMISTRY

Collection Requirements

PEAK AND TROUGH DRUG LEVELS SHOULD BE DRAWN DURING THE SAME DOSE CYCLE, with the Peak drawn 1-4 hours after the dose and the Trough drawn immediately prior to the next dose.

Primary Collection Container

Green PST (Lithium Heparin)

Alternate Collection Container

Green Microtainer PST

Transport

Refrigerated

Preferred Transport Temperature

Refrigerated

Processing

Centrifuge and refrigerate.

Separate from gel if testing is to be delayed more than 8 hours.

Stability

Ambient: 8 hours

Refrigerated: 48 hours, if separated from gel

Minimum Testing Volume

0.5 mL

Reference Range

50 – 100 µg/ml

Methodology

Roche c503 enzyme immunoassay.

Performed

Sunday – Saturday

Reported

As completed

CPT Codes

80164

Unacceptable Conditions

Specimens on gel longer than 8 hours.