OBJECTIVES: To characterize the relationship between cochlear duct length (CDL) and initial hearing preservation among cochlear implant recipients of a fully inserted 31.5 mm flexible lateral wall electrode array. STUDY DESIGN: Retrospective review. SETTING: Tertiary academic referral center. PATIENTS: Adult cochlear implant recipients who presented preoperatively with unaided hearing detection thresholds of ≤ 65 dB HL at 125 Hz and underwent cochlear implantation with a 31.5 mm flexible lateral wall array. INTERVENTION: Cochlear implantation with a hearing preservation surgical approach. MAIN OUTCOME MEASURES: Computed tomography was reviewed to determine CDL. Hearing preservation was characterized by the shift in low-frequency pure-tone average (LFPTA; 125, 250, and 500 Hz), and shift in individual unaided hearing detection thresholds at 125, 250, and 500 Hz. RESULTS: Nineteen patients met the criteria for inclusion. The mean CDL was 34.2 mm (range: 30.8-36.5 mm). Recipients experienced a mean LFPTA shift of 27.6 dB HL (range: 10-50 dB HL). Significant, negative correlations were observed between CDL and smaller threshold shifts at individual frequencies and LFPTA (p ≤ 0.048). CONCLUSION: A longer CDL is associated with greater likelihood of preserving low-frequency hearing with long arrays. Low-frequency hearing preservation is feasible with fully inserted long flexible arrays within the initial months after cochlear implantation. Preoperative measurement of CDL may facilitate a more individualized approach in array selection to permit optimal cochlear coverage while enhancing hearing preservation outcomes.
OBJECTIVES: To characterize the relationship between cochlear duct length (CDL) and initial hearing preservation among cochlear implant recipients of a fully inserted 31.5 mm flexible lateral wall electrode array. STUDY DESIGN: Retrospective review. SETTING: Tertiary academic referral center. PATIENTS: Adult cochlear implant recipients who presented preoperatively with unaided hearing detection thresholds of ≤ 65 dB HL at 125 Hz and underwent cochlear implantation with a 31.5 mm flexible lateral wall array. INTERVENTION: Cochlear implantation with a hearing preservation surgical approach. MAIN OUTCOME MEASURES: Computed tomography was reviewed to determine CDL. Hearing preservation was characterized by the shift in low-frequency pure-tone average (LFPTA; 125, 250, and 500 Hz), and shift in individual unaided hearing detection thresholds at 125, 250, and 500 Hz. RESULTS: Nineteen patients met the criteria for inclusion. The mean CDL was 34.2 mm (range: 30.8-36.5 mm). Recipients experienced a mean LFPTA shift of 27.6 dB HL (range: 10-50 dB HL). Significant, negative correlations were observed between CDL and smaller threshold shifts at individual frequencies and LFPTA (p ≤ 0.048). CONCLUSION: A longer CDL is associated with greater likelihood of preserving low-frequency hearing with long arrays. Low-frequency hearing preservation is feasible with fully inserted long flexible arrays within the initial months after cochlear implantation. Preoperative measurement of CDL may facilitate a more individualized approach in array selection to permit optimal cochlear coverage while enhancing hearing preservation outcomes.
Authors: Michael W Canfarotta; Margaret T Dillon; Emily Buss; Harold C Pillsbury; Kevin D Brown; Brendan P O'Connell Journal: Otol Neurotol Date: 2019-09 Impact factor: 2.311
Authors: Marie-Charlot Jurawitz; Andreas Büchner; Theo Harpel; Mark Schüssler; Omid Majdani; Anke Lesinski-Schiedat; Thomas Lenarz Journal: Audiol Neurootol Date: 2014-10-01 Impact factor: 1.854
Authors: George B Wanna; Brendan P O'Connell; David O Francis; Rene H Gifford; Jacob B Hunter; Jourdan T Holder; Marc L Bennett; Alejandro Rivas; Robert F Labadie; David S Haynes Journal: Laryngoscope Date: 2017-06-22 Impact factor: 3.325
Authors: Nicholas A George-Jones; Anthony M Tolisano; J Walter Kutz; Brandon Isaacson; Jacob B Hunter Journal: Otol Neurotol Date: 2020-10 Impact factor: 2.311
Authors: Christopher K Giardina; Michael W Canfarotta; Nicholas J Thompson; Douglas C Fitzpatrick; Sarah E Hodge; Jenna Baker; Brendan P O'Connell Journal: Otol Neurotol Date: 2020-07 Impact factor: 2.619
Authors: Amit Walia; Matthew A Shew; Abhinav Ettyreddy; Shannon M Lefler; Pawina Jiramongkolchai; Cameron C Wick; Nedim Durakovic; Craig A Buchman; Jacques A Herzog Journal: Otol Neurotol Date: 2022-04-01 Impact factor: 2.311
Authors: Michael W Canfarotta; Margaret T Dillon; Kevin D Brown; Harold C Pillsbury; Matthew M Dedmon; Brendan P O'Connell Journal: Otolaryngol Head Neck Surg Date: 2021-02-16 Impact factor: 5.591
Authors: Judith E Spiro; Joachim Müller; Jennifer L Spiegel; Daniel Polterauer; John-Martin Hempel; Martin Canis Journal: Eur Arch Otorhinolaryngol Date: 2021-05-29 Impact factor: 2.503