Gentamicin Trough

Test Code

GENT

CPT Codes
80170

Preferred Specimen

GREEN Lithium Heparin Plasma

Minimum Volume

0.50 mL

Other Acceptable Specimens

SST Serum Separator, Red No Gel

Instructions

Separate from cells within 1 hour of collection

Transport Container

GREEN Lithium Heparin

Transport Temperature

Room Temperature

Specimen Stability

Room Temperature: 2 hours; Refrigerated: 7 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Not separated from cells within 1 hour of collection

Methodology
Vitros 7600

Limitations

Concentrations of ß-lactam antibiotics (penicillins and cephalosporins) at therapeutic levels may inactivate gentamicin in vivo and in vitro. Specimens from patients receiving ß-lactam antibiotics (penicillins and cephalosporins) must be analyzed immediately upon receipt or stored frozen to prevent in vitro inactivation of gentamicin.

Clinical Significance

Serum or plasma gentamicin measurements are used in the diagnosis and treatment of gentamicin overdose and in monitoring levels of gentamicin to ensure appropriate therapy

Performed By
RFGH Laboratory

Performing Laboratory
RFGH Laboratory

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.