Long-Term Evolution of the Electrical Stimulation Levels for Cochlear Implant Patients

Jose Luis Vargas; Manuel Sainz; Cristina Roldan; Isaac Alvarez; Angel de la Torre

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자료유형: 학술저널

저자정보: Jose Luis Vargas Manuel Sainz Cristina Roldan Isaac Alvarez Angel de la Torre

저널정보: 대한이비인후과학회 Clinical and Experimental Otorhinolaryngology Clinical and Experimental Otorhinolaryngology 제5권 제4호

발행연도: 2012.1

수록면: 194 - 200 (7page)

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imObjectives. The stimulation levels programmed in cochlear implant systems are affected by an evolution since the first switch-on of the processor. This study was designed to evaluate the changes in stimulation levels over time and the relationship between post-implantation physiological changes and with the hearing experience provided by the continuous use of the cochlear implant. Methods. Sixty-two patients, ranging in age from 4 to 68 years at the moment of implantation participated in this study. All subjects were implanted with the 12 channels COMBI 40+ cochlear implant at San Cecilio University Hospital, Granada,Spain. Hearing loss etiology and progression characteristics varied across subjects. Results. The analyzed programming maps show that the stimulation levels suffer a fast evolution during the first weeks after the first switch-on of the processor. Then, the evolution becomes slower and the programming parameters tend to be stable at about 6 months after the first switch-on. The evolution of the stimulation levels implies an increment of the electrical dynamic range, which is increased from 15.4 to 20.7 dB and improves the intensity resolution. A significant increment of the sensitivity to acoustic stimuli is also observed. For some patients, we have also observed transitory changes in the electrode impedances associated to secretory otitis media, which cause important changes in the programming maps. Conclusion. We have studied the long-term evolution of the stimulation levels in cochlear implant patients. Our results show the importance of systematic measurements of the electrode impedances before the revision of the programming map. This report also highlights that the evolution of the programming maps is an important factor to be considered in order to determine an adequate calendar fitting of the cochlear implant processor.

#Cochlear implant #Electrical stimulation #Prosthesis adjustment #Bioelectrical impedance

참고문헌 (20)

참고문헌 신청

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