[Cochlear implantation (problems, methods, perspectives)].

Abstract

We suppose that topical problems of cochlear implantation comprise preoperative diagnosis of the acoustic nerve condition, programmimg of the speech processor using objective evaluation of acoustic function, design of new strategies of stimulation of speech processors and criteria of choice for existing strategies. In solving the above problems, the following methods are of special importance: registration of electrically evoked potential of acoustic nerve action (EPAN), registration of electrically evoked acoustic potentials (EAEP), registration of electrically evoked reflex of the musculus stapedius (ERMS). 27 patients with cochlear implants were examined to evaluate the above methods in terms of speech prosesses programming. The findings enable the conclusion that all three methods can be successively used in programming of the speech processor. While EPAN and EAEP can be used for approximate estimation of sensation threshold, ERMS registration is highly effective for determinaion of maximal comfortable level of stimulation.