Phenytoin




Test Mnemonic

PHT

CPT Codes

  • 80185 - QTY (1)

LOINC ®

3968-5

Aliases

  • Dilantin

Performing Laboratory

Cleveland Clinic Laboratories


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLPlasmaSodium or Lithium heparin (Green) RefrigeratedDo not collect in a gel separator tube. Centrifuge and transfer plasma/serum to a CCL tube and refrigerate.

Alternate Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLSerumNo additive (Red) RefrigeratedDo not collect in a gel separator tube. Centrifuge and transfer plasma/serum to a CCL tube and refrigerate.
1 mLPlasmaEDTA (Lavender) RefrigeratedDo not collect in a gel separator tube. Centrifuge and transfer plasma/serum to a CCL tube and refrigerate.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
0.5 mL     

Stability

Environmental Condition Description
Ambient After separation from cells: 4 days
RefrigeratedAfter separation from cells: 4 days
FrozenAfter separation from cells: 1 month

Days Performed

Sun - Sat

Turnaround Time

8 hours

Methodology

Name Description
Kinetic Interaction of Microparticles in a Solution 

Reference Range

Phenytoin
Sex Age From Age To Type Range Range Unit
   Years99 YearsNormal10.0 - 20.0ug/mL
   Years99 YearsUrgent> 40.0ug/mL

Special Info

Do not collect in a gel separator tube. Draw once steady state is achieved.