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Test Code PNYA Phenytoin, Total, Serum

Useful For

Monitoring for appropriate therapeutic concentration

 

Assessing compliance or toxicity

Method Name

Kinetic Interaction of Microparticles in a Solution (KIMS)

Reporting Name

Phenytoin, Total, S

Specimen Type

Serum Red


Specimen Required


Collection Container/Tube: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial within 2 hours of collection.


Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 7 days
  Frozen  14 days
  Ambient  7 days

Reject Due To

Gross hemolysis Reject

Reference Values

Therapeutic: 10.0-20.0 mcg/mL

Critical value: ≥30.0 mcg/mL

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 day

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

LOINC Code Information

Test ID Test Order Name Order LOINC Value
PNYA Phenytoin, Total, S 3968-5

 

Result ID Test Result Name Result LOINC Value
PNYA Phenytoin, Total, S 3968-5

NY State Approved

Yes

CPT Code Information

80185 

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-Neurology Specialty Testing Client Test Request (T732)

-Therapeutics Test Request (T831)