Gentamicin, Peak and Trough (Client 53380)

Test Code

32669

CPT Codes
Restricted Client Code - All other clients should use test code 444

Preferred Specimen

1 mL serum (x2) collected in red-top tubes (no gel)

Patient Preparation
Collect peak at the end of 60-minute IV infusion, 30 minutes after the end of 30-minute IV infusion or 60 minutes after the IM dose. Collect as trough just before next dose.

Minimum Volume

0.2 mL (x2)

Other Acceptable Specimens

1 mL plasma collected in EDTA (lavender-top) tube, sodium heparin (green-top) tube, or lithium heparin (green-top) tube

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 5 days
Refrigerated: 7 days
Frozen: Unacceptable

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

Serum separator tube

Methodology
Immunoassay

Setup Schedule

Set up: Tues-Sat; Report available: 3 days

Clinical Significance

Gentamicin is an aminoglycoside antibiotic used in the
treatment of gram-positive and gram-negative bacterial
infections, especially Pseudomonas, Proteus, Klebsiella and
Staphylococcus. Gentamicin is potentially nephrotoxic and
ototoxic. Serial monitoring of peak and trough serum levels
may provide the clinician with information to maintain safe
and therapeutic levels.

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.