Phenytoin, Free & Total PHEN
|Method(s)||Quantitative Enzyme Multiplied Immunoassay Technique|
|Collect||One 6 mL plain red top tube.|
2 mL serum refrigerated (Min: 1 mL). Separate from cells within 2 hours of collection.
Patient preparation: Timing of specimen collection: Pre-dose (trough) draw-At steady state concentration.
|Stability||After separation from cells: Ambient: 4 days; Refrigerated: 4 days; Frozen: 1 month|
Citrated plasma, serum separator tubes (SST). Tubes that contain liquid anticoagulant.
|Notes||Separate serum from cells within 2 hours of collection. Additional required information: 1. DOSE - List drug amount and include the units of measure; 2. ROUTE - List the route of administration (IV, oral, etc); 3. DOSE FREQUENCY - Indicate how often the dose is administered (per day, per week, as needed, etc.); 4. TYPE OF DRAW - Indicate the type of blood draw (peak, trough, random, etc.)|
|Preferred Specimen Collection Device(s)|