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A prospective study of gentamicin ototoxicity.
Acta Oto-Laryngologica
|September 1, 1978
Summary
Gentamicin therapy can cause ototoxicity, affecting hearing and vestibular function, even at low serum levels. Careful monitoring and judicious use are essential due to potential irreversible damage.
Area of Science:
- Otolaryngology
- Nephrology
- Pharmacology
Background:
- Gentamicin is a widely used antibiotic for severe infections.
- Ototoxicity is a known adverse effect of gentamicin therapy.
- Assessing ototoxicity risk factors is crucial for patient safety.
Purpose of the Study:
- To prospectively evaluate the ototoxic potential of intravenous gentamicin.
- To correlate serum gentamicin levels with ototoxicity.
- To determine the reversibility of gentamicin-induced ototoxicity.
Main Methods:
- Prospective otoneurological study involving 20 patients.
- Intravenous administration of gentamicin with regular serum level monitoring.
- Audiographic and electronystagmographic assessments before, during, and after treatment.
Main Results:
- Ten patients (50%) exhibited ototoxicity, primarily cochlear.
- Four cases of cochlear ototoxicity were fully reversible.
- Two patients developed severe hearing loss; one also had bilateral vestibular dysfunction.
- Low gentamicin serum levels did not preclude ototoxicity.
Conclusions:
- Gentamicin ototoxicity can occur even with low serum concentrations.
- Ototoxicity may manifest as cochlear or vestibular damage, with varying reversibility.
- Gentamicin should be reserved for severe infections or when less toxic alternatives fail.