Test Overview
Test Methodology

Fluorescence Polarization Immunoassay (FPIA)

Test Usage

Monitor therapeutic drug level

Reference Range *

Therapeutic: Peak: 5-10 mcg/mL; Trough: 0.0 - 2.0 mcg/mL.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 hours

Soft Order Code
GENPK
MiChart Code
Gentamicin Level, Peak
Laboratory
Chemical Pathology
Section
Automation
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

Collect blood in a SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. For maximum clinical significance, usual sampling times are Peak: 0.5 to 1 hour after the end of a 30 minute I.V. infusion (one hour following I.M. administration) or Trough: immediately before next dose is given. Indicate whether specimen is Peak, Trough, or Random level.

Alternate Specimen
Red top or Green top tube (heparin).
Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
80170
Fee Code
23312
LOINC
Trough 22747-0; Peak 22746-2; Random 15106-8
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