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Test Code LAB31 Phenytoin (Dilantin)

Department

CHEMISTRY

Collection Requirements

Draw just prior to next dose.

Primary Collection Container

Green PST (Lithium Heparin)

Alternate Collection Container

Green Microtainer PST

Transport

Plasma refrigerated

Preferred Transport Temperature

Refrigerated

Processing

Centrifuge and refrigerate.

Separate from gel if testing is to be delayed more than 8 hours.

Stability

Refrigerated: 48 hours

Minimum Testing Volume

0.5 mL

Reference Range

10-20 mcg/mL

Methodology

Roche c503 The assay is based on the kinetic interaction of microparticles in a solution (KIMS)

Performed

Sunday – Saturday

Reported

As completed

CPT Codes

80185

Unacceptable Conditions

Specimens remaining on gel longer than 8 hours are unacceptable.