Test Code DLTN Dilantin® (Phenytoin), Plasma or Serum
Methodology
Turbidometric Immunoassay
Performing Laboratory
Aspen Valley Hospital
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Plasma
Container/Tube: Green-top (lithium heparin) tube(s)
Specimen: 2 mL (minimum volume: 0.5 mL) of lithium heparin plasma
Transport Temperature: Ambient
Collection Instructions: Spin down immediately and send entire tube to laboratory. If there is a delay in transport of >8 hours, send specimen refrigerated ≤7 days.
Note: 1. Indicate plasma on request
form.
2. Label specimen appropriately (plasma).
Reference Values
Therapeutic range: 10.0-20.0 µg/mL
Critical value (automatic call-back): >30.0 µg/mL
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
80185