SciELO - Scientific Electronic Library Online

vol.78 issue2Objective computorized evaluation of normal patterns of facial muscles contractionTinnitus in individuals without hearing loss and its relationship with temporomandibular dysfunction author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Brazilian Journal of Otorhinolaryngology

Print version ISSN 1808-8694


MAIA, Francisco Carlos Zuma e; DOLGANOV, Alexandre  and  LAVINSKY, Luiz. Assessing cochlear evoked potentials after electrocautery-induced trauma to the utricle. Braz. j. otorhinolaryngol. [online]. 2012, vol.78, n.2, pp.52-58. ISSN 1808-8694.

Utriculostomy is a new surgical alternative for Ménière's disease. The basis of this procedure is that the outcome of an electrocautery-induced utricular trauma does not affect cochlear function. However, a demonstration of the hypothesis that this approach to the utricle would preserve hearing is still pending. OBJECTIVE: To determine whether any changes would occur in the electrical potentials evoked in the cochlea and auditory nerve before, during, and 1 month after a surgical procedure in the utricule in an animal model. MATERIALS AND METHODS: An experimental study. Eight sheep underwent electrocautery-induced utricular trauma, and their cochlear function was assessed by electrocochleography - recording of electrical evoked potentials, in the preoperative, immediate postoperative and medium-term postoperative periods. The results were analyzed statistically. RESULTS: There were no statistically significant variations in amplitude (p = 0.099) and latency (p = 0.591) before and 1 month after the surgical procedure. There was a statistically significant change in the summation of the potential/action potential area ratio (p = 0.0122), a calculated loss of 11.8 dB. CONCLUSION: The intervention performed in this study enabled us to conclude that, taking into account the impaired electrophysiological responses observed during and 1 month after the surgical procedure, hearing was preserved in the operated sheep.

Keywords : saccule and utricle; surgical procedures; operative; meniere disease.

        · abstract in Portuguese     · text in Portuguese     · English ( pdf ) | Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License