Phenytoin, Free




Test Mnemonic

PHTFR

CPT Codes

  • 80186 - QTY (1)

LOINC ®

3969-3

Aliases

  • Dilantin, Free

Performing Laboratory

Cleveland Clinic Laboratories


Specimen Requirements

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

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1.5 mL     

Stability

Environmental Condition Description
AmbientAfter separation from cells: 7 days
RefrigeratedAfter separation from cells: 7 days
FrozenAfter separation from cells: 14 days

Days Performed

Sun - Sat

Turnaround Time

8 hours

Methodology

Name Description
Kinetic Interaction of Microparticles in a Solution 

Reference Range

Phenytoin, Free
Sex Age From Age To Type Range Range Unit
   Years99 YearsNormal1.0 - 2.0ug/mL
   Years99 YearsUrgent> 4.0ug/mL

Special Info

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