Laboratory Services
Phenytoin (Dilantin)
Print this pageUpdated Test Information:
| Test Description |
Phenytoin (Dilantin)
|
|
|---|---|---|
| Synonym(s) |
Dilantin, Diphenylhydantoin, DPH |
|
| Test ID |
DIL
|
|
| Performing Lab |
Labcorp |
|
| General Information |
Phenytoin Level |
|
| Container Type |
Red-top tube OR green-top (heparin) tube. DO NOT USE A GEL-BARRIER TUBE. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant. |
|
| Specimen Type |
Serum |
|
| Specimen Requirements |
1 mL |
|
| Alternate Specimen Type |
Mint PST, Red Top, Lav Top or Green Top |
|
| Specimen Collection / Processing Instructions |
Serum/Plasma must be centrifuged and aliquoted to a plastic tube within 24 hours of collection |
|
| Minimum Sample Volume |
0.5 mL |
|
| Pediatric Min. Volume (if applicable) |
1 full Mint Microtainer |
|
| Stability |
Room temperature |
|
| Unacceptable Specimen Conditions |
Hemolysis |
|
| Methodology |
Enzyme Multiplies Immunoassay technique (EMIT) |
|
| Estimated TAT |
2 Days |
|
| Testing Schedule |
Daily |
|
| CPT Code(s) |
80185 |
|
| Reference Range |
Units: mcg/mL Male |
|
| STAT Orderable (Y/N) |
No |
|
| LOINC Code(s) |
3968-5 |
