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HelpTest Code VALPF Valproic Acid, Free, Serum
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 2 mL
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.
Children's Mercy Hospital
Note:
CMH COLLECTION: 3 mL in red gel vacutainer
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Frozen | 28 days | ||
| Ambient | 72 hours |
Useful For
Monitoring free valproic acid in therapy
Assessing compliance
Evaluating potential toxicity
Reject Due To
| Gross hemolysis | Reject |
Day(s) Performed
Monday through Sunday
Report Available
Same day/1 dayReporting Name
Valproic Acid, Free, SReference Values
Therapeutic: 5-25 mcg/mL
Critical value: >30 mcg/mL
Method Name
Ultrafiltration Followed by Immunoassay
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80165