Valproic Acid, Total and Free
Test Mnemonic
VPAFT2
CPT Codes
- 80164 - QTY (1)
- 80165 - QTY (1)
Performing Laboratory
Cleveland Clinic Laboratories
FDA Category
Laboratory Developed Test
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 3 mL | Serum | No additive (Red) | Refrigerated | Do not collect in a gel separator tube. Centrifuge and transfer serum to a CCL tube and refrigerate. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1.8 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | Not acceptable |
| Refrigerated | After separation from cells: 5 days |
| Frozen | After separation from cells: 14 days |
Days Performed
Sun - Sat
Turnaround Time
8 hours
Methodology
| Name | Description |
|---|---|
| Homogenous Enzyme Immunoassay (HEIA) |
Reference Range
| Valproic Acid | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | 50 - 100 | ug/mL | Years | 99 Years | Urgent | > 150 | ug/mL |
| Valproic Acid, Free | |||||
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | 4.0 - 30.0 | ug/mL | Years | 99 Years | Urgent | > 75.0 | ug/mL |
Special Info
Do not collect in a gel separator tube. Draw immediately before next dose.