Balance function after cochlear implant and inner ear anomaly: Comparison of dynamic posturography

Introduction. The purpose of the present study is to investigate the effect of electrical-acoustic stimulation on vestibular function in CI patients by using the EquiTest and to help answer the question of whether electrically stimulating the inner ear using a cochlear implant influences the balance system in any way.Material and Methods. A test population () was selected at random from among the cochlear implant recipients. Dynamic posturography (using the EquiTest) was performed with the device switched off an switched on.Results. In summary, it can be said that an activated cochlear implant affects the function of the vestibular system and may, to an extent, even lead to a stabilization of balance function under the static conditions of dynamic posturography, but nevertheless also to a significant destabilization. Significant improvements in vestibular function were seen mainly in equilibrium scores under conditions 4 and 5, the composite equilibrium score, and the vestibular components as revealed by sensory analysis.Conclusions. Only under the static conditions are significantly poorer scores achieved when stimulation is applied. It may be that the explanation for any symptoms of dizziness lies precisely in the fact that they occur in supposedly noncritical situations, since, when the cochlear implant makes increased demands on the balance system, induced disturbances can be centrally suppressed.

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The Influence of a Cochlear Implant Electrode on the Mechanical Function of the Inner Ear

Otology & Neurotology ◽

10.1097/mao.0b013e3181ca372b ◽

2010 ◽

Vol 31 (3) ◽

pp. 512-518 ◽

Cited By ~ 20

Author(s):

Alexander M. Huber ◽

Sim Jae Hoon ◽

Bonabi Sharouz ◽

Bodmer Daniel ◽

Eiber Albrecht

Keyword(s):

Cochlear Implant ◽

Inner Ear ◽

Mechanical Function

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A new cochlear implant electrode with a “cork”-type stopper for inner ear malformations

Auris Nasus Larynx ◽

10.1016/j.anl.2013.12.011 ◽

2014 ◽

Vol 41 (4) ◽

pp. 331-336 ◽

Cited By ~ 18

Author(s):

Levent Sennaroğlu ◽

Gamze Atay ◽

Münir Demir Bajin

Keyword(s):

Cochlear Implant ◽

Inner Ear ◽

Inner Ear Malformations ◽

Ear Malformations

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

Life ◽

10.3390/life11040301 ◽

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.

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Role of Computed Tomography and Magnetic Resonance Imaging in detecting the Prevalence of inner ear anomalies among cochlear implant candidates

QJM ◽

10.1093/qjmed/hcab106.007 ◽

2021 ◽

Vol 114 (Supplement_1) ◽

Author(s):

Alaa Nasser Hussain Zaher ◽

Tougan Taha Abd El Aziz ◽

Ahmed Samy Abdelrahman

Keyword(s):

Magnetic Resonance Imaging ◽

Computed Tomography ◽

Hearing Loss ◽

Cochlear Implant ◽

Inner Ear ◽

Resonance Imaging ◽

High Resolution Computed Tomography ◽

Vestibular Aqueduct ◽

Incomplete Partition ◽

Ear Anomalies

Abstract Background Hearing loss management using cochlear implants in patients with inner ear anomalies has long been discussed in the otology community. Magnetic resonances imaging (B,/IRI) and Computed tomography (CT) play important roles in the preoperative assessment of inner ear abnormalities such as cochlear nerve deficiency and variant anatomy as these abnormalities may not only affect the decision of the implantation procedure or the patient's prognosis regarding auditory improvement, but also the risk of complications. Objective To examine the prevalence of inner ear anomalies among cochlear implant recipients in patients with congenital sensorineural hearing loss among the pediatric age group in the Demerdash hospital, Ain Shams university using High resolution computed tomography (HRCT) and MRI imaging. Methods A retrospective descriptive study over the course of 9 months that included all patients that are candidates for cochlear implant referred to the Radiology department, Ain Shams University Hospitals for a preoperative imaging in the form of CT and VIRI scans. Results CT and MRI scans of 33 patients who had congenital hearing loss and were candidates for cochlear implantation with total 66 ears were reviewed. Inner ear anomalies were identified in 8 patients representing a prevalence (24.2%) with 14 ear diseased. Anomalies were seen bilaterally in 6 patients and unilaterally in 2 patients. Among the 14 diseased ear, 9 ears (64.3%) were seen with incomplete partition Il, 7 ears (50%) were seen with enlarged vestibular aqueduct, 4 ears (28.6%) were seen with cochlear hypoplasia, 3 ears (21.4%) were seen with semicircular canal aplasia, 2 ears (14.3%) were seen with incomplete partition type I, 2 ears (14.3%) were seen with cochlear nerve aplasia, 2 ears with cochlear aplasia (14.3%), I ear (7.1%) was seen with common cavity ear (7.1%) with complete labyrinthine aplasia. Conclusion Prevalence of inner ear anomalies among cochlear implant candidates was 24.2%. This result is consistent with results worldwide and the most common anomalies were Incomplete partition Il and large vestibular aqueduct. Abbreviations Computed tomography (CT), Magnetic resonance imaging (MRI), High resolution computed tomography (HRCT), Internal auditory canal (IAC), Cerebellopontine angle (CPA).

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Cochlear implant in immune mediated inner ear diseases: Impedance variations and clinical outcomes

Cochlear Implants International ◽

10.1080/14670100.2021.1992149 ◽

2021 ◽

pp. 1-10

Author(s):

Francesca Atturo ◽

Ginevra Portanova ◽

Francesca Yoshie Russo ◽

Daniele De Seta ◽

Laura Mariani ◽

...

Keyword(s):

Cochlear Implant ◽

Inner Ear ◽

Clinical Outcomes ◽

Ear Diseases ◽

Immune Mediated

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Effect of using smart phones on balance functions

QJM ◽

10.1093/qjmed/hcab094.021 ◽

2021 ◽

Vol 114 (Supplement_1) ◽

Author(s):

N Hazzaa ◽

DM Hassan ◽

Sh Mahmoud

Keyword(s):

Healthy Subjects ◽

Smart Phone ◽

Balance Function ◽

Visual Fatigue ◽

Vestibular Disorder ◽

Dynamic Posturography ◽

Group I ◽

Significant Difference ◽

Group Ii ◽

Composite Scores

Abstract Objective To investigate the effect of visual fatigue caused by smart phone on the balance function. Subjects and Methods Forty subjects divided into 2 groups were included in the present study . Group I, twenty normal healthy subjects with mean age of 28.8 years. Group II, twenty subjects with a clinical diagnosis of peripheral vestibular disorder with mean age of 38.85years. They were subjected to a computer vision syndrome questionnaire (CVS-Q) , occulomotor tests of videonystagmography (VNG) and sensory organization test (SOT) of computerized dynamic posturography (CDP) before and after visual fatigue induction. Results Significant differences existed between C5, 6 and composite scores in group I and in C4 and composite scores in group II after visual fatigue induction. However, there was no significant difference between occulomotor tests in both groups after visual fatigue induction. Conclusions The smart phone use can affect the balance function in healthy subjects and augment the deficit in those with balance problem. Reducing visual fatigue should be considered through various procedures as taking proper rest, adjusting the brightness of screen, avoid any wrong posture and using filters if possible.

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The Effect of Pulling Out Cochlear Implant Electrodes on Inner Ear Microstructures: A Temporal Bone Study

International Journal of Otolaryngology ◽

10.1155/2011/107176 ◽

2011 ◽

Vol 2011 ◽

pp. 1-4 ◽

Cited By ~ 2

Author(s):

Ingo Todt ◽

Rainer O. Seidl ◽

Arne Ernst

Keyword(s):

Cochlear Implant ◽

Inner Ear ◽

Temporal Bone ◽

Basilar Membrane ◽

Temporal Sequence ◽

Pull Out ◽

Temporal Bones

The exchange of an cochlear implant or the re-positioning of an electrode have become more frequently required than a decade ago. The consequences of such procedures at a microstructural level within the cochlea are not known. It was the aim of the present study to further investigate the effects of an CI electrode pull-out. Therefore 10 freshly harvested temporal bones (TB) were histologically evaluated after a cochlear implant electrode pull-out of a perimodiolar electrode. In additional 9 TB the intrascalar movements of the CI electrode while being pulled-out were digitally analysed by video- capturing. Histologically, a disruption of the modiolar wall or the spiral osseous lamina were not observed. In one TB, a basilar membrane lifting up was found, but it could not be undoubtedly attributed to the pull-out of the electrode. When analyzing the temporal sequence of the electrode movement during the pull-out, the electrode turned in one case so that the tip elevates the basilar membrane. The pull- out of perimodiolarly placed CI electrodes does not damage the modiolar wall at a microstructural level and should be guided (e.g., forceps) to prevent a 90 o turning of the electrode tip into the direction of the basilar membrane.

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Launching of a cochlear implant program at the Cracow Otolaryngology Clinic

Polski Przegląd Otorynolaryngologiczny ◽

10.5604/01.3001.0013.1410 ◽

2019 ◽

Vol 8 (1) ◽

pp. 1-5

Author(s):

Maciej Wiatr ◽

Kazimierz Niemczyk ◽

Jacek Składzień ◽

Agnieszka Wiatr

Keyword(s):

Cochlear Implant ◽

Inner Ear ◽

Bone Conduction ◽

Acoustic Trauma ◽

Sensory Cells ◽

Hearing Disorders ◽

Speech Processor ◽

External Part ◽

The Right ◽

Specialist Center

Introduction: It is estimated that hearing impediment affects approximately 12% of the population. Some forms of hearing disorders can be successfully treated conservatively, while in others surgery plays a key role. Often, therapeutic methods are exhausted and the patient faces the decision about the need for acoustic organ prosthesis. Depending on the causes of anomalies, apparatus for air conduction, bone conduction or cochlear implants are used. A cochlear implant replaces the damaged sensory cells of the inner ear. It constitutes an electronic prosthesis of the acoustic organ, composed of two parts. The internal part (implanted in the inner ear) consists of an implant and electrodes, which conduct electrical signals to the cochlea. The external part consists of a microphone, a speech processor, and a transmitter. Care report: A 70-year-old patient with deep hearing loss in the right ear and deafness of the left ear. During the interview, the patient denied mechanical injuries of the head and neck, acoustic trauma, inflammation or otorrhea. Based on the conducted tests, qualification otolaryngology, audiology, and otoneurology, radiology, surdologopedy and psychology were performed for cochlear implant insertion. The patient was qualified for cochlear implantation in the left ear under general anesthesia. The surgical team was composed of dr hab. Maciej Wiatr, prof. dr hab. Kazimierz Niemczyk, prof. dr hab. Jacek Składzień, MD Agnieszka Wiatr with anesthetic monitoring under the supervision of MD Renata Witkowska. The patient was discharged home on day 7 after surgery in good general and local condition. Simultaneous rehabilitation was started at the Center for Daily Rehabilitation of Hearing and Speech at the Specialist Center of Diagnosis and Rehabilitation for Children and Adolescents with Hearing Disabilities of the Polish Association of the Deaf in Cracow.

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