Phenytoin, Free
Test Mnemonic
PHTFR
CPT Codes
- 80186 - QTY (1)
LOINC ®
3969-3
Aliases
- Dilantin, Free
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 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 |
|---|---|---|---|---|---|
| 1.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | After separation from cells: 7 days |
| Refrigerated | After separation from cells: 7 days |
| Frozen | After separation from cells: 14 days |
Days Performed
Sun - Sat
Turnaround Time
8 hours
Methodology
| Name | Description |
|---|---|
| Kinetic Interaction of Microparticles in a Solution |
Reference Range
| Phenytoin, Free | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | 1.0 - 2.0 | ug/mL | Years | 99 Years | Urgent | > 4.0 | ug/mL |
Special Info
Do not collect in a gel separator tube. Draw once steady state is achieved.