Phenytoin, Plasma

Overview
Department	Biochemistry
Test Code	PHTN
Synonyms	Dilantin
Turnaround Time	1 - 2 hours
Specimen Requirements
Specimen Type	Serum Plasma
Specimen Transportation	Sample should be ideally collected immediately before next dose
Preferred	6 mL Plain Red-Top</span
Acceptable	or Li-Hep Green-Top
Pediatric Requirements	600 μL  Li-Hep Microtainer
Aliquot Requirements
Sample Type
Minimum Volume	1 mL
Aliquot Transportation
Stability – Add test
Clinical Information
Reference Intervals	Reference Range: 40 - 80 umol/L (For trough levels)
Test Method	Roche Cobas 6000 using Roche Online reagents
Advanced Notice
Patient Preparation
Comments
Please supply last dosage details (time, date and dose) where possible, and collect sample immediately prior to next dose.