Valproic Acid Drug Level

Label Mnemonic:	VALP
Epic code:	LAB25
Downtime form:	A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Chemistry
6240 RCP
356-3527

Specimen(s):

Plasma

Collection Medium:

Plasma Separator Tube 4.5 mL

Alternate Collection Media:

Call laboratory for additional acceptable specimen collection containers.

Minimum:

3 mL whole blood in light green top tube or ONE Microtainer^®.

Testing Schedule:

24 hrs/day, 7 days a week, including holidays.

Turn Around Time:

1 hour (upon receipt in laboratory)

Reference Range:

50-100 μg/mL

Critical value: >150 μg/mL

Test Limitations:

Criterion: recovery plus or minus 10% of initial value at 
concentrations of 50 μg/mL and 100 μg/mL.

Icterus: No significant interference from bilirubin up to an I index 
of 
30 (approximate bilirubin concentration: 30 mg/dL).

Hemolysis: No significant interference from hemoglobin up to an H 
index 
of 500 (approximate hemoglobin concentration: 500 mg/dL).

Lipemia (Intralipid): No significant interference up to an L index of 
500 (approximate triglycerides concentration: 1000 mg/dL). There is 
poor correlation between turbidity and triglycerides concentration.

No significant interference from total protein of 2-12 g/dL.

Methodology:

Homogenous Enzyme Immunoassay

CPT Code:

80164

See Additional Information:
Chemistry Critical Lab Values