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Unilateral vestibulotoxicity due to systemic gentamicin therapy
1Department of Neurology, Alfred Hospital, Melbourne, Australia. John.Waterston@med.mnash.edu.au
Acta Oto-Laryngologica
|September 3, 1998
Summary
Systemic gentamicin can cause vestibular dysfunction. This study found patients with ataxia and oscillopsia but no vertigo, suggesting unilateral or asymmetrical bilateral vestibular loss after gentamicin exposure.
Area of Science:
- Ototoxic effects of antibiotics
- Neuroscience
- Vestibular system disorders
Background:
- Systemic gentamicin is known to cause bilateral vestibular dysfunction.
- Symptoms include chronic vestibular insufficiency, such as ataxia and oscillopsia.
- Vertigo is a common symptom associated with vestibular loss.
Purpose of the Study:
- To investigate cases of vestibular dysfunction following gentamicin exposure.
- To explore the mechanisms behind the absence of vertigo in affected patients.
- To understand the presentation of gentamicin-induced vestibular injury.
Main Methods:
- Case report of 6 patients with ataxia and oscillopsia.
- Caloric testing to assess vestibular function.
- Analysis of patient history for vertigo and gentamicin exposure.
Main Results:
- All 6 patients presented with ataxia and oscillopsia.
- No history of vertigo was reported in these patients.
- Caloric testing revealed severe unilateral loss of vestibular function.
Conclusions:
- The absence of vertigo may indicate subacute unilateral vestibular loss allowing for compensation.
- Alternatively, asymmetrical recovery following bilateral vestibular loss is a possible explanation.
- Vestibular hair cell regeneration after aminoglycoside damage may contribute to asymmetrical recovery.
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