Electrocochleography in Cochlear Implant Recipients With Residual Hearing

2017 ◽  
Vol 38 (3) ◽  
pp. e161-e167 ◽  
Author(s):  
Kanthaiah Koka ◽  
Aniket A. Saoji ◽  
Leonid M. Litvak
Keyword(s):  
Cochlear Implant ◽  
Residual Hearing

scholarly journals In Situ 3D-Imaging of the Inner Ear Synapses with a Cochlear Implant

Life ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 301
Author(s):  
Kathrin Malfeld ◽  
Nina Armbrecht ◽  
Holger A. Volk ◽  
Thomas Lenarz ◽  
Verena Scheper
Keyword(s):  
Cochlear Implant ◽  
Inner Ear ◽  
Laser Scanning ◽  
3D Imaging ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Sensory Cells ◽  
Residual Hearing ◽  
Preparation Methods

In recent years sensorineural hearing loss was found to affect not exclusively, nor at first, the sensory cells of the inner ear. The sensory cells’ synapses and subsequent neurites are initially damaged. Auditory synaptopathies also play an important role in cochlear implant (CI) care, as they can lead to a loss of physiological hearing in patients with residual hearing. These auditory synaptopathies and in general the cascades of hearing pathologies have been in the focus of research in recent years with the aim to develop more targeted and individually tailored therapeutics. In the current study, a method to examine implanted inner ears of guinea pigs was developed to examine the synapse level. For this purpose, the cochlea is made transparent and scanned with the implant in situ using confocal laser scanning microscopy. Three different preparation methods were compared to enable both an overview image of the cochlea for assessing the CI position and images of the synapses on the same specimen. The best results were achieved by dissection of the bony capsule of the cochlea.

scholarly journals Impact of Intrascalar Electrode Location, Electrode Type, and Angular Insertion Depth on Residual Hearing in Cochlear Implant Patients

2015 ◽  
Vol 36 (8) ◽  
pp. 1343-1348 ◽  
Author(s):  
George B. Wanna ◽  
Jack H. Noble ◽  
Rene H. Gifford ◽  
Mary S. Dietrich ◽  
Alex D. Sweeney ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Residual Hearing ◽  
Insertion Depth ◽  
Electrode Location

Preservation of Residual Hearing After Cochlear Implant Surgery With Deep Insertion Electrode Arrays

2019 ◽  
Vol 40 (4) ◽  
pp. e373-e380 ◽  
Author(s):  
Cristina Sierra ◽  
Manuela Calderón ◽  
Eduardo Bárcena ◽  
Alexandra Tisaire ◽  
Eduardo Raboso
Keyword(s):  
Cochlear Implant ◽  
Residual Hearing ◽  
Electrode Arrays ◽  
Implant Surgery ◽  
Deep Insertion ◽  
Cochlear Implant Surgery

scholarly journals Acoustic to Electric Pitch Comparisons in Cochlear Implant Subjects with Residual Hearing

2006 ◽  
Vol 7 (2) ◽  
pp. 110-124 ◽  
Author(s):  
Colette Boëx ◽  
Lionel Baud ◽  
Grégoire Cosendai ◽  
Alain Sigrist ◽  
Maria-Izabel Kós ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Residual Hearing

Electrode design and insertional depth-dependent intra-cochlear pressure changes: a model experiment

2017 ◽  
Vol 132 (3) ◽  
pp. 224-229 ◽  
Author(s):  
P Mittmann ◽  
A Ernst ◽  
I Todt
Keyword(s):  
Cochlear Implant ◽  
Fluid Pressure ◽  
Electrode Array ◽  
Lateral Wall ◽  
Peak Frequency ◽  
Peak Amplitude ◽  
Residual Hearing ◽  
Electrode Arrays ◽  
Pressure Peak ◽  
Pressure Changes

AbstractBackground:Preservation of residual hearing is one of the major goals in modern cochlear implant surgery. Intra-cochlear fluid pressure changes influence residual hearing, and should be kept low before, during and after cochlear implant insertion.Methods:Experiments were performed in an artificial cochlear model. A pressure sensor was inserted in the apical part. Five insertions were performed on two electrode arrays. Each insertion was divided into three parts, and statistically evaluated in terms of pressure peak frequency and pressure peak amplitude.Results:The peak frequency over each third part of the electrode increased in both electrode arrays. A slight increase was seen in peak amplitude in the lateral wall electrode array, but not in the midscalar electrode array. Significant differences were found in the first third of both electrode arrays.Conclusion:The midscalar and lateral wall electrode arrays have different intra-cochlear fluid pressure changes associated with intra-cochlear placement, electrode characteristics and insertion.

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