| 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 # |
Dilantin (Phenytoin)
Test CodeDIL
Alias/See Also
Phenytoin
CPT Codes
80185
Preferred Specimen
Serum (gold top) tube
Minimum Volume
0.5 mL
Other Acceptable Specimens
Lithium Heparin Plasma (green top) tube
Transport Container
Serum (gold top) tube or Lithium Heparin Plasma (green top) tube
Transport Temperature
Room Temperature or Refrigeration
Specimen Stability
Room Temperature - 8 hours; Refrigerated - 7 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed, Quantity Not Sufficient, EDTA (purple top tube) contamination, IV contamination
Methodology
Colorimetric
Setup Schedule
Daily upon receipt
Report Available
Upon completion of analysis
Limitations
Specimens with elevated Total Protein > 9.0 g/dL may give a positive bias greater than 2.3 ug/mL.
Reference Range
Therapeutic Range: 10 - 20 ug/mL
Clinical Significance
Phenytoin is a widely prescribed anticonvulsant drug used in the treatment of generalized and partial seizures. Phenytoin measurements are used to monitor patient compliance and therapy and to diagnose potential overdose.