Test Name: | Phenytoin, Total |
Epic Order Code: | LAB31 | | |
CPT Code: | 80185 | | |
Specimen(s) Type: | Serum | | |
Acceptable Container(s): | Top is red. |
Testing Schedule: | 24 hrs/day, 7 days/week |
Turn Around Time: | STAT: 1 hour | | |
| Routine: 2 hours | | |
Collection Information: | No special patient preparation is required. Obtain specimen by standard collection procedures. |
Transport Information: | Deliver to lab immediately. All specimens must be signed into the laboratory. |
Reference Clients: | If unable to deliver to the lab within 1 hour, centrifuge the specimen and remove serum from the red cells. Store and transport at 2-8° C. Specimen must be received in the lab within 24 hours. |
Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport. |
Reference Range: | 10.0 - 20.0 µg/mL |
| Critical: > 30 µg/mL |
Additional Information: | Due to the observed cross-reactivity of this assay with fosphenytoin, it is recommended that specimens be collected at least 2 hours after an intravenous dose and at least 4 hours after an intramuscular dose of fosphenytoin. |