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Test Code LAB31 Phenytoin (Dilantin) Level

Performing Lab

Arnot Ogden Medical Center

Ordering Recommendations

Monitoring for appropriate therapeutic concentration.

Assessing compliance or toxicity.

Collect

Serum or Plasma

Collection Device

Gold Top Tube, Green Top Tube

Collection Instructions

Draw a sample within two to four hours after an intravenous loading dose and, at steady state, collect a specimen representing the trough level just before the next scheduled dose

Specimen Volume

5 mL

Stability (from collection to initiation)

Room Temp 8 Hours
Refrigerated 30 Days
Frozen 3 Months

 

Storage/Transport Temperature

Room Temp, Refrigerated or Frozen

Minimum Requirements

1 mL

Specimen Handling

Sample must be separated within 2 hours of centrifugation.

Methodology

Enzyme Immunoassay

Remarks

TURN AROUND TIME

STAT 1 Hour
Routine 8 Hours

Start Date

6/4/20

Last Review Date

7/14/25 ES