Diphenylhydantoin, Serum

CERNER / EPIC MNEMONIC: DIL
POE DESCRIPTION: DILANTIN, TOTAL; DILANTIN
CPT CODE: 80185
TEST INFORMATION: Optimal sampling time is at trough, just before the next dose.
DAYS PERFORMED: Daily, 24 hours
TURNAROUND TIME: Routine: 4 hours; stat: 1 hour
CONTAINER TYPE: Red top tube - 4 mL
SPECIMEN REQUIREMENTS:

2.0 mL blood (1.0 mL serum)

MINIMUM VOLUME: 1.0 mL blood (0.2 mL serum)
REFERENCE RANGE: Therapeutic: 10-20 µg/mL
METHODOLOGY:

Enzyme Immunoassay

CRITICAL VALUES: >30 µg/mL
TEST SYNONYM(S):Dilantin.; Phenytoin