| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Phenytoin, Total : 713
Test CodePTNT or 713
Alias/See Also
Dilantin; Hydantoin
CPT Codes
80185
Instructions
Collect as a trough just prior to next dose. For patients receiving fosphenytoin therapy, collect as a trough at least 2 hours after IV infusion or at least 4 hours after IM injection.
Plain red. Also acceptable: lavender (EDTA), green (no gel) (sodium heparin) tube, or green (no gel) (lithium heparin) tube.
Plain red. Also acceptable: lavender (EDTA), green (no gel) (sodium heparin) tube, or green (no gel) (lithium heparin) tube.
Transport Container
Centrifuge plain red, lavender, or green tube and aliquot 1 mL (Min: 0.2 mL) serum or plasma into a standard transport tube.
Transport Temperature
Refrigerated.
Specimen Stability
After separation from cells: Ambient: 5 days; Refrigerated: 10 days; Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum separator tube.
Methodology
Immunoassay (IA)
Setup Schedule
Tuesday-Saturday
Report Available
1-4 days (From receipt at performing laboratory)
Reference Range
10.0-20.0 mg/L
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.
Performing Laboratory
Quest Diagnostics
