Evidence-Based modification of intratympanic gentamicin injections in patients with intractable vertigo

Feng Zhai, Jian Ping Liu, Chun Fu Dai, Qi Wang, Peter S. Steyger

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


OBJECTIVES: To compare the cochlear distribution of low-dose fluorescent gentamicin after intra-tympanic administration in guinea pig (GPs) with clinical data of low dose intra-tympanic gentamicin in patients with intractable vertigo. MATERIALS AND METHODS: Purified gentamicin-Texas Red (GTTR) was injected intratympanically into GPs and the cochlear distribution and time course of GTTR fluorescence in outer hair cells (OHCs) was determined using confocal microscopy. RESULTS: GTTR was rapidly taken up by OHCs, particularly in the subcuticular zone. GTTR was distributed in the cochlea in a decreasing baso-apical gradient, and was retained within OHCs without significant decrease in fluorescence until 4 weeks after injection. CONCLUSION: OHCs rapidly take up GTTR after intra-tympanic administration with slow clearance. CLINICAL APPLICATION: A modified low-dose titration intratympanic approach was applied to patients with intractable Ménière's Disease (MD) based on our animal data and the clinical outcome was followed. After the modified intratympanic injections for MD patients, vertigo control was achieved in 89% patients, with hearing deterioration identified in 16% patients. The 3-week interval titration injection technique thereby had a relatively high vertigo control rate with a low risk of hearing loss, and is a viable alternative to other intratympanic injection protocols.

Original languageEnglish (US)
Pages (from-to)642-648
Number of pages7
JournalOtology and Neurotology
Issue number4
StatePublished - Jun 2010
Externally publishedYes


  • Gentamicin
  • Intratympanic injection
  • Méniére's disease
  • Vertigo

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Sensory Systems
  • Clinical Neurology


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