In patients with a cochlear implant (CI), the first critical point in processing auditory information from sound stimuli that leads to comprehension is the interface between the electrode and the cochlear nerve, which is dependent on providing appropriate current input. The purpose of this work was to evaluate the longitudinal differences in psychoacoustic fitting parameters in CI users. We stu...

1. Balkany TJ, Connell SS, Hodges AVet al. Conservation of residual acoustic hearing after cochlear implantation. Otol Neurotol 2006;27:1083-8. 2. von Ilberg C, Kiefer J, Tillein Jet al. Electric-acoustic stimulation of the auditory system. New technology for severe hearing loss. ORL; journal for oto-rhino-laryngology and its related specialties 1999;61:334-40. 3. Gantz BJ, Turner CW. Combining...

This study reviews the cochlear histology from four hearing preservation cochlear implantation experiments conducted on 73 guinea pigs from our institution, and relates histopathological findings to residual hearing. All guinea pigs had normal hearing prior to surgery and underwent cochlear implantation via a cochleostomy with a silastic-platinum dummy electrode. Pure tone auditory brainstem re...

OBJECTIVE Multi-centre collaborative study to develop and refine the design of a prototype thin perimodiolar cochlear implant electrode array and to assess feasibility for use in human subjects. STUDY DESIGN Multi-centre temporal bone insertion studies. MATERIALS AND METHODS The modiolar research array (MRA) is a thin pre-curved electrode that is held straight for initial insertion with an ...

Background: Cochlear implants are now an acceptable therapeutic option for those patients with irreversible hearing loss and deaf-mutism. The surgery is time consuming and complicated. Hence, the technique of anaesthesia plays a crucial role in success of cochlear implant surgery. Cochlear implant patients have various types of syndromes which are important from anaesthetic as well as surgical ...

Aims The cochlear implant is an electroneural implanted device which helps to restore communication in patients with profound auditory deafness. The implant, works on the concept of direct electrical stimulation of the spiral ganglion cells, within the cochlea. The cochlea is a snail-like coiled structure, apart of the inner-ear labyrinth; its role is to convert hydro-dynamic vibrations to elec...

Aline Gomes Bittencourt, Robinson Koji Tsuji, João Paulo Ratto Tempestini, Alfredo Luiz Jacomo, Ricardo Ferreira Bento, Rubens de Brito 1 Doctoral student in the Department of Otorhinolaryngology, Medical School, University of São Paulo, São Paulo, Brazil (Fellow in Otological and Skull Base Surgery at Hospital das Clínicas, University of São Paulo, São Paulo, Brazil). 2 PhD in Sciences (Associ...

OBJECTIVES Atraumatic and complete insertion of the electrode array is a stated objective of cochlear implant surgery. However, it is known that obstructions within the cochlea such as new bone formation, cochlear otosclerosis, temporal bone fracture, and cochlear anomalies may limit the depth of insertion of the electrode array. In addition, even among patients without obvious clinical or radi...

In the classic view of cochlear mechanics, the cochlea is comprised of two identical fluid chambers separated by the cochlear partition (CP). In this view the traveling wave pressures in the two chambers mirror each other; they are equal in magnitude and opposite in phase. A fast pressure mode adds approximately uniformly. More recent models of cochlear mechanics take into account the structura...

Objectives: Gastroduodenal agents may have the differential role in GERD (gastroesophageal reflux disease). Besides pepsin and bile acid reflux, trypsin might also play a significant role in the middle ear pathologies. The aim of the current study was to identify trypsin with the presence of bile acid and pepsin in the middle ear fluids of children undergoing myringotomy and tube placement for ...