| Ordering Code | 440 |
|---|---|
| Test Name | Dilantin |
| Alias | Phenytoin Dilantin-125 Phenytek Diphenyldantoin |
| Preferred Specimen | Serum |
| Preferred Container | SST (Gold) |
| Other Specimen/Container | Plasma in Lithium Heparin (Green), Serum in Plain (Red) |
| Optimum Volume | 0.5 mL |
| Handling Instructions | Send aliquot if transport time >24 hours. |
| Transport Requirements | Oahu: Ambient Airline: Ambient Send frozen aliquot if transport time >4 days. |
| Specimen Stability | Ambient: 4 Days Refrigerated: 4 Days Frozen Serum: 1-2 months capped at -20 C Frozen serum samples should be thawed only once. Test cannot be added to >24 hours, unaliquoted specimens. Do not freeze Lithium Heparin Plasma. |
| Rejection Criteria | Grossly hemolyzed, Specimen older than stability limits, Uncentrifuged gel separator tube specimens >2 hours old, Unaliquoted gel separator tube specimens >24 hours old, Frozen Lithium Heparin plasma |
| Avail. Stat | YES |
| Analytic Time | 1 Day |
| Methodology | KIMS (Kinetic interaction of microparticles in a solution) |
Reference range(s)
The reference ranges listed below are valid on this date of June 29, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Dilantin | ALL | 10.0-20.0 | >= 30.0 | 10.0-20.0 | >= 30.0 | ug/mL |