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Vanderbilt Pathology Laboratory Services

Test Directory



VALPROIC ACID BLOOD (VAL)

Department: Toxicology
Test Synonym(s): Depakene, Depakote, Valproate, VAL
CPT Codes: 80164
Methodology: FPIA
Reference Range: 0-150 yrs: Therapeutic range: 50 - 100 mcg/mL
Tube Type: Dark green top (Sodium Heparin)
Specimen: Blood
Alternate Specimen: Red top (no gel)
Pediatric Requirements: 1 dark green microtainer
Volume: 5 mL blood
Minimum Volume: 0.5 mL serum or plasma
Temperature: Refrigerated if not delivered to the lab immediately
Stability: Refrigerated: 2 days, frozen at -20 C for longer storage
Reasons for Rejection: Hemolysis, low volume
Days Performed: Daily
Times Performed: Continuous
TAT: Stat: 1 hour, routine: 2 hours
Special Instructions: Draw immediately before next dose. Refrigerate if not delivered immediately.

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