Computed-Tomography Estimates of Interaural Mismatch in Insertion Depth and Scalar Location in Bilateral Cochlear-Implant Users

被引：8

作者：

Goupell, Matthew J. ^{[1
]}

Noble, Jack H. ^{[2
,3
,4
]}

Phatak, Sandeep A. ^{[5
]}

Kolberg, Elizabeth ^{[1
]}

Cleary, Miranda ^{[1
]}

Stakhovskaya, Olga A. ^{[1
,5
]}

Jensen, Kenneth K. ^{[5
]}

Hoa, Michael ^{[6
]}

Kim, Hung Jeffrey ^{[6
]}

Bernstein, Joshua G. W. ^{[5
]}

机构：

[1] Univ Maryland, Dept Hearing & Speech Sci, College Pk, MD 20742 USA

[2] Vanderbilt Univ, Dept Hearing & Speech Sci, 221 Kirkland Hall, Nashville, TN 37235 USA

[3] Vanderbilt Univ, Dept Elect Engn & Comp Sci, 221 Kirkland Hall, Nashville, TN 37235 USA

[4] Vanderbilt Univ, Med Ctr, Dept Otolaryngol, Nashville, TN 37232 USA

[5] Walter Reed Natl Mil Med Ctr, Natl Mil Audiol & Speech Pathol Ctr, Bethesda, MD USA

[6] Georgetown Univ, Dept Otolaryngol Head & Neck Surg, Med Ctr, Washington, DC USA

来源：

OTOLOGY & NEUROTOLOGY | 2022年 / 43卷 / 06期

基金：

美国国家卫生研究院;

关键词：

Bilateral cochlear implants; Computed-tomography scans; Interaural mismatch; AUDITORY BRAIN-STEM; BINAURAL INTERACTION COMPONENT; ELECTRODE-NEURON INTERFACE; PLACE-OF-STIMULATION; SPEECH RECOGNITION; TIME SENSITIVITY; SPIRAL GANGLION; HEARING; PITCH; POSITION;

D O I：

10.1097/MAO.0000000000003538

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Hypothesis Bilateral cochlear-implant (BI-CI) users will have a range of interaural insertion-depth mismatch because of different array placement or characteristics. Mismatch will be larger for electrodes located near the apex or outside scala tympani, or for arrays that are a mix of precurved and straight types. Background Brainstem superior olivary-complex neurons are exquisitely sensitive to interaural-difference cues for sound localization. Because these neurons rely on interaurally place-of-stimulation-matched inputs, interaural insertion-depth or scalar-location differences for BI-CI users could cause interaural place-of-stimulation mismatch that impairs binaural abilities. Methods Insertion depths and scalar locations were calculated from temporal-bone computed-tomography scans for 107 BI-CI users (27 Advanced Bionics, 62 Cochlear, 18 MED-EL). Results Median interaural insertion-depth mismatch was 23.4 degrees or 1.3 mm. Mismatch in the estimated clinically relevant range expected to impair binaural processing (>75 degrees or 3 mm) occurred for 13 to 19% of electrode pairs overall, and for at least three electrode pairs for 23 to 37% of subjects. There was a significant three-way interaction between insertion depth, scalar location, and array type. Interaural insertion-depth mismatch was largest for apical electrodes, for electrode pairs in two different scala, and for arrays that were both-precurved. Conclusion Average BI-CI interaural insertion-depth mismatch was small; however, large interaural insertion-depth mismatch-with the potential to degrade spatial hearing-occurred frequently enough to warrant attention. For new BICI users, improved surgical techniques to avoid interaural insertion-depth and scalar mismatch are recommended. For existing BI-CI users with interaural insertion-depth mismatch, interaural alignment of clinical frequency tables might reduce negative spatial-hearing consequences.

引用

页码：666 / 675

页数：10

共 11 条

[11] Effect of interaural electrode insertion depth difference and independent band selection on sentence recognition in noise and spatial release from masking in simulated bilateral cochlear implant listening
Fathima, Hasna
Bhat, Jayashree S.
Pitchaimuthu, Arivudai Nambi
EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY, 2023, 280 (07) : 3209 - 3217

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