Alpha Medical Lab
Phenytoin (Dilantin)
Ordered Test Code:
PHENYTOIN
| Lab Test Component | Requirement |
|---|---|
| Test Name | Phenytoin (Dilantin) |
| Alpha’s Order Test Code | PHENYTOIN |
| Specimen Collection Tube | Red Top (no gel)/1mL |
| Collection Tube Handling | Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube |
| Minimum Volume | 0.2mL |
| Transport Temperture | Refrigerated |
| Stability | Refrigerated: 10 days; Frozen: 30 days |
| Collection Instructions | 1mL serum collected in a red-top tube (no gel) |
Clinical Significance
Phenytoin is an anticonvulsant hydantoin used for the treatment of generalized tonic-clonic (grand mal) and complex partial seizures. Phenytoin is also used for prophylaxis in neurosurgical procedures. Phenytoin levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.
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