Test Code GENTT Gentamicin, Trough LAB26
Test Method
Turbidimetric Inhibition Immunoassay; Beckman DXC600
Performance
Testing is performed Monday through Sunday.
Routine: Typically completed within 4 hours after
the specimen arrives at the testing site.
Expedite: Typically completed within 2 hours after the
specimen arrives at the testing site.
STAT: Typically completed within 1 hour after the
specimen
arrives at the testing site.
Useful For
Monitoring adequacy of serum concentration during gentamicin
therapy
Specimen Requirement
0.5 mL of serum or plasma is required for testing.
CPT Code Information
80170 Therapeutic Drug Levels; Gentamicin
Reference Values
<2 mcg/mL
-
Toxic Level: >2 mcg/mL
- The effective therapeutic concentration for pediatric
patients
may be higher than adults.
LOINC Code Information
3665-7 Gentamicin [Mass/Volume] In Serum Or Plasma-Trough
Additional Specimen Collection Information
Collect blood in a lithium heparin green-top or red-top
tube.
Serum and plasma gel tubes are not acceptable. Lipemic samples
>
4+ turbidity must be cleared prior to analysis. It is
recommended
that the serum or plasma be separated from contact with cells
within 2 hours from time of collection. Serum or plasma should
be
stored refrigerated if assays are not completed within 8 hours.
If
assays are not completed within 48 hours, freeze the sample.