PHENYTOIN (DILANTIN) | |
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Test Code: 139 | Specimen Collection: Plasma from a Lavender or Lithium Heparin |
Component: Phenytoin | Method: IA |
Collection Notes: Collect as a trough just before the next dose. Plasma should be physically separated from cells as soon as possible with a maximum limit of 2 hours from the time of collection. Centrifuge and physically separate the plasma using a plastic transfer pipette into a separate plastic transfer tube. | |
Clinical Utility: Phenytoin is used for the treatment of grand mal and complex partial seizures. Phenytoin levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity. | |
CPT Code: 80185 | Testing Location: Sent to reference lab |
SPECIMEN/STABILITY TYPETemperature:Plasma (1 mL), EDTA Ambient 5 Days Refrigerated 10 Days Frozen 30 Days Plasma (1 mL), Lithium Heparin Ambient 5 Days Refrigerated 10 Days Frozen 30 Days |