Phenytoin, Plasma
Tests:Phenytoin, Plasma
Overview | |
|---|---|
| Department | Biochemistry |
| Test Code | PHTN |
| Synonyms | Dilantin |
| Availability | Monday - Sunday, testing routinely available out of hours |
| Turnaround Time | 1 - 2 hours |
| Stability – Add test | |
Specimen Requirements | |
| Specimen | Serum
Plasma |
| Preferred | 6 mL Plain Red-Top</span |
| Acceptable | 6 mL Li-Hep Green-Top |
| Unacceptable | |
| Specimen Transportation | Sample should be ideally collected immediately before next dose |
| Paediatric Requirements | 600 μL Li-Hep Microtainer |
Aliquot Requirements | |
| Sample | |
| Preferred Volume | |
| Minimum Volume | 1 mL |
| Aliquot Transportation | |
Clinical Information | |
| Reference Intervals | Reference Range: 40 - 80 umol/L (For trough levels) |
| Test Method | Abbott Alinity c series analyser using Abbott reagents.
Enzymatic immunoassay |
| Advanced Notice | |
| Patient Preparation | |
Comments | |
| Please supply last dosage details (time, date and dose) where possible, and collect sample immediately prior to next dose. | |
| Owner | Clair Crossley (Crossley1) |
|---|---|
| Last reviewed | 30.01.2026 |
| Next review | 30.01.2027 (OK) |