BACKGROUND: Postoperative imaging studies by numerous groups have revealed that final cochlear implant (CI) electrode position impacts audiological outcomes with scalar location consistently shown to be a significant factor. Modiolar proximity has been less extensively studied, and findings regarding the effect of insertion depth have been inconsistent. METHODS: Using previously developed automated algorithms, we determined CI electrode position in an Institutional Review Board-approved database of 220 CI ears. Generalized linear models (GLM) were used to analyze the relationship between audiological outcomes and factors including age, duration of CI use, device type, and electrode position. RESULTS: For precurved arrays, GLM revealed that scalar position, modiolar proximity, base insertion depth, and sex were significant factors for Consonant-Nucleus-Consonant (CNC) words (R = 0.43, p < 0.001, n = 92 arrays), while scalar position, modiolar proximity, age, and postlingual onset of deafness were significant for Bamford-Kawal-Bench Sentences in Noise (BKB-SIN) (R = 0.51, p < 0.001, n = 85) scores. Other factors were not significant in the final model after controlling for these variables. For straight arrays, we found the insertion depth, postlingual deafness, and length of CI use to be highly significant (R = 0.47, p < 0.001) factors for CNC words (91 arrays), while for BKB-SIN scores the most significant (R = 0.47, p < 0.001) factors were insertion depth, younger age, and postlingual deafness (89 arrays). CONCLUSION: Our results confirm the significance of electrode positioning in audiological outcomes. The most significant positional predictors of outcome for precurved arrays were full scala tympani (ST) insertion and the modiolar distance, while for the lateral wall arrays the depth of insertion was the most significant factor.
BACKGROUND: Postoperative imaging studies by numerous groups have revealed that final cochlear implant (CI) electrode position impacts audiological outcomes with scalar location consistently shown to be a significant factor. Modiolar proximity has been less extensively studied, and findings regarding the effect of insertion depth have been inconsistent. METHODS: Using previously developed automated algorithms, we determined CI electrode position in an Institutional Review Board-approved database of 220 CI ears. Generalized linear models (GLM) were used to analyze the relationship between audiological outcomes and factors including age, duration of CI use, device type, and electrode position. RESULTS: For precurved arrays, GLM revealed that scalar position, modiolar proximity, base insertion depth, and sex were significant factors for Consonant-Nucleus-Consonant (CNC) words (R = 0.43, p < 0.001, n = 92 arrays), while scalar position, modiolar proximity, age, and postlingual onset of deafness were significant for Bamford-Kawal-Bench Sentences in Noise (BKB-SIN) (R = 0.51, p < 0.001, n = 85) scores. Other factors were not significant in the final model after controlling for these variables. For straight arrays, we found the insertion depth, postlingual deafness, and length of CI use to be highly significant (R = 0.47, p < 0.001) factors for CNC words (91 arrays), while for BKB-SIN scores the most significant (R = 0.47, p < 0.001) factors were insertion depth, younger age, and postlingual deafness (89 arrays). CONCLUSION: Our results confirm the significance of electrode positioning in audiological outcomes. The most significant positional predictors of outcome for precurved arrays were full scala tympani (ST) insertion and the modiolar distance, while for the lateral wall arrays the depth of insertion was the most significant factor.
Authors: Laura K Holden; Charles C Finley; Jill B Firszt; Timothy A Holden; Christine Brenner; Lisa G Potts; Brenda D Gotter; Sallie S Vanderhoof; Karen Mispagel; Gitry Heydebrand; Margaret W Skinner Journal: Ear Hear Date: 2013 May-Jun Impact factor: 3.570
Authors: Kimerly A Powell; Gregory J Wiet; Brad Hittle; Grace I Oswald; Jason P Keith; Don Stredney; Steven Arild Wuyts Andersen Journal: Int J Comput Assist Radiol Surg Date: 2021-02-13 Impact factor: 2.924
Authors: William G Morrel; Katherine E Riojas; Robert J Webster; Jack H Noble; Robert F Labadie Journal: Int J Comput Assist Radiol Surg Date: 2020-05-14 Impact factor: 2.924
Authors: Trevor L Bruns; Katherine E Riojas; Robert F Labadie; Robert J Webster Iii Journal: IEEE Trans Biomed Eng Date: 2022-01-20 Impact factor: 4.538
Authors: William G Morrel; Jourdan T Holder; Benoit M Dawant; Jack H Noble; Robert F Labadie Journal: Otolaryngol Head Neck Surg Date: 2020-02-25 Impact factor: 3.497
Authors: Katelyn A Berg; Jack H Noble; Benoit M Dawant; Robert T Dwyer; Robert F Labadie; René H Gifford Journal: J Acoust Soc Am Date: 2021-04 Impact factor: 1.840
Authors: Calvin D Eiber; Jean Delbeke; Jorge Cardoso; Martijn de Neeling; Sam E John; Chang Won Lee; Jerry Skefos; Argus Sun; Dimiter Prodanov; Zach McKinney Journal: IEEE Open J Eng Med Biol Date: 2021-02-22
Authors: Elise E Zhao; James R Dornhoffer; Catherine Loftus; Shaun A Nguyen; Ted A Meyer; Judy R Dubno; Theodore R McRackan Journal: JAMA Otolaryngol Head Neck Surg Date: 2020-07-01 Impact factor: 6.223