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Valproic Acid, Plasma or Serum

Performing Laboratory

Rutland Regional Medical Center Laboratory

Specimen Requirements

Specimen Type: Blood
Container/Tube: 
Preferred:
Light-green top (lithium heparin gel)

Acceptable: Gold top, serum gel

Specimen Volume: Full tube

Specimen Minimum Volume: 2 mL

Collection Instructions:

1. Draw blood 30 minutes before dose.

2. Send specimen in original tube.

3. If there is a delay in transport of >1 hour, centrifuge tube.

Days Performed

Daily

Analytical Time:

1 day

Available Stat

Methodology

Turbidimetric Inhibition

Test Classification and CPT Coding

80164

Normal Reference Values

Therapeutic concentration: 50-100 µg/mL

Specimen Transport Temperature

Refrigerated

Critical Values

>150 µg/mL (automatic call-back)