Phenytoin

Overview

  • EPIC Code:
  • LAB31
  • Soft Test Code:
  • PHENY
Alternate Names
  • Dilantin
  • Phenytoin Level, Total

Specimen Collection & Preparation

Specimen Requirements:

-OR-

1.0 mL Serum from a Red Top Tube in a Plastic Vial
Minimum Volume:
0.25 mL Serum*
Neonatal Volume:
0.3 mL Whole Blood Red Microtainer*

* This volume does not allow for repeat testing

Collection Instructions:

Should be drawn 2 - 4 hours after IV dose, or just prior to next oral dose

Do not collect in a gel barrier tube

Green microtainer is preferred for capillary collection


Rejection Criteria:

Gel Barrier Tube (SST or PST)


Transport and Storage:
  • Ambient (18-24°C): 4 Days
  • Refrigerated (2-8°C): 4 Days

Clinical Interpretation

Reference Range:

10 - 20 ug/mL


Critical Ranges:

> 40.0 ug/mL


Methodology:
  • Immunoassay (IA)

Production Schedule

Sites Performed
  • Parkview Regional Medical Center
Days Performed
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Departments
  • Chemistry
Turn Around Time

Same day/next day


Coding & Compliance

CDM

01485145


CPT Coding

80185