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Test Code LAB31 Phenytoin Level (Dilantin), Total

Collection:

Specimen: Blood

Container: Plain Red Top Tube. Avoid the use of separator tubes and gels.

Volume: 5 mL; Minimum 1 mL

 

Pediatric Collection:

One Red microtainer filled to 600 uL.

Stability:

Once serum is separated from cells:

 

Ambient: 8 Hours

Refrigerated (preferred): 1 Week

Frozen: 2 Weeks

Turn Around Time (TAT):

STAT: 1 HOUR

Routine: 3 HOURS

Test Availability:

24 hours a day / 7 days a week

Performing Laboratory Section:

Chemistry / UMC MAIN LABORATORY

Reference Interval:

Therapeutic: 10.0 - 20.0  mcg/mL

Toxic: > 30 mcg/mL

Interpretive Data:

Effective 7/14/2015, phenytoin (dilantin) is measured by an immunochemiluminescent assay on the Abbott ARCHITECT i2000 analyzers. This assay is FDA-approved for serum and plasma only. Testing other biological fluids has not been validated. Serum/plasma reference ranges do not apply to other sample types. Interpret with caution.

Additional Test Codes

DIL