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Phenobarbital
Test CodePHEN
Alias/See Also
Luminal
CPT Codes
80184
Preferred Specimen
Serum (gold top) tube
Minimum Volume
0.5 mL
Other Acceptable Specimens
Lithium Heparin Plasma (green top) tube
Instructions
.
Transport Container
Serum (gold top) tube or Lithium Heparin Plasma (green top) tube
Transport Temperature
Room Temperature or Refrigeration
Specimen Stability
Room Temperature - 24 hours; Refrigerated - 1 month
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Quantity Not Sufficient, IV contamination
Methodology
Turbidimetric
Setup Schedule
Daily upon receipt
Report Available
Upon completion of analysis
Reference Range
10 - 40 ug/mL
Clinical Significance
Phenobarbital is a commonly prescribed anti-convulsant used mainly in the treatment of seizure disorders, and is particularly useful for tonic-clonic, partial focal motor, temporal lobe, and febrile seizures. Phenobarbital measurements are used to monitor patient compliance and therapy, and to diagnose potential overdose.