OBJECTIVES: 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.
OBJECTIVES: 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.
Authors: Isaac Alvarez; Angel de la Torre; Manuel Sainz; Cristina Roldán; Hansjoerg Schoesser; Philipp Spitzer Journal: Ear Hear Date: 2010-02 Impact factor: 3.570
Authors: Beth A Holstad; Valerie G Sonneveldt; Beverly T Fears; Lisa S Davidson; Roxanne J Aaron; Marie Richter; Maggie Matusofsky; Christine A Brenner; Michael J Strube; Margaret W Skinner Journal: Ear Hear Date: 2009-02 Impact factor: 3.570
Authors: Bart Vaerenberg; Cas Smits; Geert De Ceulaer; Elie Zir; Sally Harman; N Jaspers; Y Tam; Margaret Dillon; Thomas Wesarg; D Martin-Bonniot; L Gärtner; Sebastian Cozma; Julie Kosaner; Sandra Prentiss; P Sasidharan; Jeroen J Briaire; Jane Bradley; J Debruyne; R Hollow; Rajesh Patadia; Lucas Mens; K Veekmans; R Greisiger; E Harboun-Cohen; Stéphanie Borel; Dayse Tavora-Vieira; Patrizia Mancini; Helen Cullington; Amy Han-Chi Ng; Adam Walkowiak; William H Shapiro; Paul J Govaerts Journal: ScientificWorldJournal Date: 2014-02-04
Authors: Teresa G Vos; Margaret T Dillon; Emily Buss; Meredith A Rooth; Andrea L Bucker; Sarah Dillon; Adrienne Pearson; Kristen Quinones; Margaret E Richter; Noelle Roth; Allison Young; Matthew M Dedmon Journal: Laryngoscope Date: 2021-02-16 Impact factor: 2.970