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Test Code VALP VALPROIC ACID

Performing Laboratory

Porter Hospital Laboratory

Specimen Requirements

Specimen Type: Blood
Container/Tube: Tiger top, serum gel
Also Acceptable: Green top (Lithium Heparin)
Specimen Volume: Full tube, submit 0.4 mL serum
Specimen Minimum Volume: 0.35 mL
Collection Instructions:
1. Send specimen in original tube.
2. If there is a delay in transport of >1 hour, centrifuge tube.
3. Centrifuged samples are stable for:
• 8 hours at room temperature
• 2 days at 2 – 8º C
For longer storage, freeze at -20ºC or colder.

Specimen Transport Temperature

Refrigerated

Days Performed

Daily; Available STAT

Test Classification and CPT Coding

80164

Normal Reference Values

50-100 mcg/mL

Critical Values

> 150 µg/mL