Medialization of electrode array in cochlear implantation

2000 ◽  
Vol 114 (10) ◽  
pp. 746-749 ◽  
Author(s):  
S. J. Watts ◽  
P. Lindsey ◽  
M. Hawthorne
Keyword(s):  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Electrode Array ◽  
Main Thrust ◽  
Stapedial Reflex ◽  
Two Parameters

In the last few years, the main thrust of research into cochlear implantation has centred around the development of advanced multi-channel implants. A new area of development is now concentrating on maximizing the potential of each individual electrode in order to improve the quality of hearing. This study involved the medialization of the cochlear implant electrode array using a silastic positioner in five patients. Two parameters were measured, namely current units needed to produce a stapedial reflex, and impedance levels between the electrode and modiolus. On insertion of the cochlear implant, readings were taken before the insertion of the positioner, immediately afterwards and at two months.

scholarly journals A Cochlearis Implantáltak Funkcionális Indexe (CIFI) magyarországi bevezetésével szerzett kezdeti tapasztalatok

2019 ◽  
Vol 160 (33) ◽  
pp. 1296-1303
Author(s):  
Gréta Bodzai ◽  
Márton Kovács ◽  
János Uzsaly ◽  
Kinga Harmat ◽  
Adrienn Németh ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Social State ◽  
Remarkable Improvement ◽  
Quality Of Life Questionnaires ◽  
Function Index

Abstract: Introduction: The success of cochlear implantation can be evaluated with audiological measurements and quality of life questionnaires. Aim: Our aim was to translate and introduce the Cochlear Implant Function Index (CIFI) test to analyze the physical, psychological and social state of our cochlear implant patients. Method: Between 01. 11. 2016 and 31. 05. 2018, 30 patients filled the questionnaire before and 6 and 12 months after the implantation. Results and conclusion: Results showed a remarkable improvement in the quality of life in several patients even after 6 months. Further improvements could be measured after 12 months. Orv Hetil. 2019; 160(33): 1296–1303.

scholarly journals Extra- and Intracochlear Electrocochleography in Cochlear Implant Recipients

2015 ◽  
Vol 20 (5) ◽  
pp. 339-348 ◽  
Author(s):  
Adrian Dalbert ◽  
Flurin Pfiffner ◽  
Christof Röösli ◽  
Konrad Thoele ◽  
Jae Hoon Sim ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Middle Ear ◽  
Cochlear Implantation ◽  
Low Frequency ◽  
Electrode Array ◽  
Postoperative Phase ◽  
Residual Hearing ◽  
Middle Ear Effusion ◽  
Cochlear Function ◽  
Ear Effusion

Objective: To monitor cochlear function by extra- and intracochlear electrocochleography (ECoG) during and after cochlear implantation and thereby to enhance the understanding of changes in cochlear function following cochlear implantation surgery. Methods: ECoG responses to acoustic stimuli of 250, 500 and 1,000 Hz were recorded in 9 cochlear implant recipients with presurgical residual hearing. During surgery extracochlear ECoG recordings were performed before and after insertion of the cochlear implant electrode array. After insertion of the electrode array, intracochlear ECoG recordings were conducted using intracochlear electrode contacts as recording electrodes. Intracochlear ECoG recordings were performed up to 6 months after implantation. ECoG findings were correlated with findings from audiometric tests. Results: Extra- and intracochlear ECoG responses could be recorded in all subjects. Extracochlear ECoG recordings during surgery showed moderate changes. Loss or reduction of the ECoG signal at all three frequencies did not occur during cochlear implantation. During the first week following surgery, conductive hearing loss, due to middle ear effusion, led to a decrease in intracochlear ECoG signal amplitudes. This was not attributable to changes of cochlear function. All persistent reductions in ECoG response magnitude after normalization of the tympanogram occurred during the first week following implantation. Thresholds of ECoG signals were at or below hearing thresholds in all cases. Conclusion: Gross intracochlear trauma during surgery appears to be rare. In the early postoperative phase the ability to assess cochlear status by ECoG recordings was limited due to the regular occurrence of middle ear effusion. Still, intracochlear ECoG along with tympanogram recordings suggests that any changes of low-frequency cochlear function occur mainly during the first week after cochlear implantation. ECoG seems to be a promising tool to objectively assess changes in cochlear function in cochlear implant recipients and may allow further insight into the mechanisms underlying the loss of residual hearing.

scholarly journals Multicentre cohort study of cochlear implantation outcomes in Thailand

BMJ Open ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. e054041
Author(s):  
Patorn Piromchai ◽  
Napas Tanamai ◽  
Sivaporn Kiatthanabumrung ◽  
Suwicha Kaewsiri ◽  
Kanthong Thongyai ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Cohort Study ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Secondary Outcome ◽  
University Hospitals ◽  
Implant Surgery ◽  
Cochlear Implant Surgery ◽  
The Mean

ObjectivesTo report the status and outcomes of cochlear implantation in Thailand.DesignCohort study.SettingTertiary care and university hospitals.ParticipantsPatients who underwent cochlear implant surgery in Thailand.InterventionsThis project collected data from all government and university hospitals in Thailand where cochlear implant surgery was performed between 2016 and 2020.Primary and secondary outcome measuresBaseline characteristics, operation data, complications, audiological outcomes and quality of life were reported.ResultsThis study included 458 patients, and nearly half of the patients were children and adolescents (46.94%). The mean age of the patients was 2.96±5.83 years. At 1 year postoperatively, the mean pure tone average of the hearing threshold in the implanted ear significantly improved from unaided preoperative baseline (mean difference (MD) 64.23 dB HL; 95% CI 59.81 to 68.65; p<0.001). The mean speech recognition threshold also improved (MD 55.96 dB HL; 95% CI 49.50 to 62.42, p<0.001). The quality-of-life scores of the EQ-5D-5L, PedsQL and HUI3 questionnaires at 1 year showed improved mobility (range, 0–5; MD 0.65; 95% CI 0.05 to 1.25; p=0.037), hearing (range, 0–6; MD 0.96; 95% CI 0.30 to 1.61; p=0.006) and speech (range, 0–5; MD 0.44; 95% CI 0.04 to 0.84; p=0.031). Common complications included electrode dislodgement (2.18%), vertigo (1.23%) and meningitis (1.93%).ConclusionsExcellent audiological outcomes and improvement in the quality of life in the mobility, hearing and speech domains were observed in patients who underwent cochlear implantation in Thailand.

Cochlear implantation of a deaf blind patient with mitochondrial cytopathy

1999 ◽  
Vol 113 (4) ◽  
pp. 353-354 ◽  
Author(s):  
Helen E. Cullington
Keyword(s):  
Quality Of Life ◽  
Mitochondrial Dna ◽  
Case Report ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
The Body ◽  
Genetic Defects ◽  
Mitochondrial Cytopathy ◽  
Sensorineural Hearing Impairment

AbstractGenetic defects of the mitochondrial DNA often cause sensorineural hearing impairment, accompaniment by disorders of organs within the body. This case report describes cochlear implantation of a 33-year-old deaf blind female with mitochondrial cytopathy. The outcome was very successful, and vastly improved quality of life for this patient. Many cases of mitochondrial cytopathy cause progressive deafness; it is, therefore, likely that other patients with this unusual disorder will present for cochlear implant assessment.

Quality of Life after Sequential Bilateral Cochlear Implantation: An Updated Comprehensive Cochlear Implant Questionnaire

2016 ◽  
Vol 156 (2) ◽  
pp. 334-340 ◽  
Author(s):  
Edmund A. Nahm ◽  
Penny Liberatos ◽  
Qiuhu Shi ◽  
Erica Lai ◽  
Ana H. Kim
Keyword(s):  
Quality Of Life ◽  
Cochlear Implant ◽  
Cochlear Implantation

scholarly journals Cochlear Implant Surgical Technique: Our Experience

2018 ◽  
Vol 01 (01) ◽  
pp. 007-010
Author(s):  
Milind Kirtane ◽  
Kashmira Chavan
Keyword(s):  
Surgical Technique ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Electrode Array ◽  
Surgical Approaches ◽  
Implant Surgery ◽  
Original Technique ◽  
Cortical Mastoidectomy ◽  
Cochlear Implant Surgery ◽  
Posterior Tympanotomy

Abstract Introduction Different surgical approaches have been adopted for cochlear implantation, with cortical mastoidectomy–posterior tympanotomy being the most commonly followed technique. Method In this article, we describe the surgical technique for cochlear implant followed at our center, which has been successfully implemented in more than 2,500 cochlear implant surgeries. Cochlear implant surgery using the cortical mastoidectomy–posterior tympanotomy technique has been performed in more than 2,500 cases with some modifications to the original technique over a period of time. Results In spite of not using tie-down holes and securing down the receiver–stimulator with sutures, no cases of receiver–stimulator displacement or outward electrode migration have been noted with the current technique of creating a snug-fitting subperiosteal pocket along with a hook for the electrode array. Conclusion Adhering to a strict intraoperative surgical protocol plays an extremely important role in carrying out successful cochlear implant surgeries with minimal complications.

Self-Determination Calibration for Cochlear Implant Rehabilitation

2019 ◽  
pp. 121-154
Author(s):  
Dionysios Politis ◽  
Sophia Aidona ◽  
Petros Stagiopoulos ◽  
Georgios Kyriafinis ◽  
Jannis Constantinidis
Keyword(s):  
Quality Of Life ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Cognitive Skills ◽  
Therapeutic Approach ◽  
Medical Intervention ◽  
Hearing Impaired ◽  
Self Determination

Cochlear implantation is a well-established therapeutic approach for deaf or hearing-impaired patients. After the medical intervention, which aims to restore hearing, subjects undergo rehabilitation procedures in order to cure instructional disadvantages, problematic schooling circumstances, or deficits in their sociability. Essential physical, mental, social, and cognitive skills are taken into perspective, as the prerequisite of a notable aptitude determines the suitability of a subject to get professional and communal roles. Quality of life, as an indicator, provides the metrics that demonstrate the level of adoption with established norms.

Postlingually Deaf Adults of All Ages Derive Equal Benefits from Unilateral Multichannel Cochlear Implant

2011 ◽  
Vol 22 (10) ◽  
pp. 637-643 ◽  
Author(s):  
Edward Park ◽  
David B. Shipp ◽  
Joseph M. Chen ◽  
Julian M. Nedzelski ◽  
Vincent Y.W. Lin
Keyword(s):  
Quality Of Life ◽  
Speech Recognition ◽  
Cochlear Implant ◽  
Hearing Aids ◽  
Cochlear Implantation ◽  
Hearing Aid ◽  
Age Groups ◽  
Perceived Quality Of Life ◽  
Deaf Adults

Background: Controversy still exists regarding the impact of age on speech recognition following cochlear implant in postlingually deaf adults. In some studies elderly recipients did not perform as well as younger patients on standard speech recognition tests. Furthermore, previous studies have shown that cochlear implantation improves quality of life, as measured by self-administered questionnaires, but the sample sizes of these studies have been relatively small, thus making age stratification a challenge. Purpose: The primary objective was to assess whether the age at which a patient receives a unilateral cochlear implant affects improvements in speech recognition scores and perceived quality of life. A secondary objective was to determine whether preoperative use of hearing aids correlates with improvement in speech recognition and perceived quality of life after cochlear implantation. Research Design: A retrospective study in a tertiary referral center. Patients: A total of 161 postlingually deaf adults, who were divided based on age (<50, 50–65, >65) and on prior hearing aid(s) use. Intervention: All patients received a unilateral multichannel cochlear implant. Data Collection and Analysis: Speech recognition was quantified by percent correct scores on the Hearing in Noise Test sentences delivered in a quiet setting only (HINT%), and quality of life was quantified by the Hearing Handicap Inventory (HHI) before and 1 yr after cochlear implantation. Results: Speech recognition, as measured by HINT%, improved significantly and to similar extents in all three age groups following cochlear implantation. Similarly, quality of life as quantified by HHI improved markedly and to similar extents in all age groups. Whether hearing aids were used pre-implant, or whether the cochlear implant (CI) was implanted on the same side or contralateral to the hearing aid side, had no substantial effect on the patients’ performances on either speech recognition or quality of life. Moreover, there were no statistically significant correlations between pre-implant speech recognition scores and pre-implant quality of life scores or between postimplant speech recognition scores and postimplant quality of life scores. Conclusion: The findings of the present study demonstrate that cochlear implantation improves HINT% and HHI scores to similar extents across all age groups. This finding suggests that elderly patients may derive speech recognition and quality of life benefits similar to those of younger patients and that age should not be an essential factor in the determination of CI candidacy. Furthermore, prior use of a hearing aid, and its location in relation to the cochlear implant, does not influence the extent of improvement in speech recognition or quality of life measurements following cochlear implantation.

Another reason for intra-operative imaging during cochlear implantation

2008 ◽  
Vol 122 (4) ◽  
Author(s):  
M Viccaro ◽  
E De Seta ◽  
E Covelli ◽  
V Marvaso ◽  
R Filipo
Keyword(s):  
Cochlear Implant ◽  
Semicircular Canal ◽  
Cochlear Implantation ◽  
Electrode Array ◽  
Neural Response ◽  
Radiological Assessment ◽  
Implant Surgery ◽  
Stimulation Intensity ◽  
Cochlear Implant Surgery ◽  
The Right

AbstractObjective:We report a case of a rare cochlear implant complication: the introduction of the electrode array into the superior semicircular canal, with intra-operative measurements of neural response reactions suggesting reasonable functioning of the implant.Case report:A two-year old patient affected by congenital, profound, sensorineural deafness underwent bilateral cochlear implantation at the ENT clinic of the ‘La Sapienza’ University of Rome. Two Clarion 90k devices were implanted, and electrophysiological and radiological checks were performed. After the introduction of the array in the right side, neural response imaging was performed, and a neural potential was found only on two apical electrodes, at a stimulation intensity of 431 clinical units. The situation differed on the left side, where neural response imaging was present at a stimulation intensity of 300 clinical units on the two electrodes tested (one apical electrode (number three), and one middle electrode (number nine)). Intra-operative radiological assessment with a transorbital plain films was performed as usual in order to assess the position of the electrodes inside the cochlea. This radiography showed the electrode array to be in the superior semicircular canal in the right ear.Conclusion:Intra-operative monitoring tests during cochlear implant surgery play different roles; measurement of impedances and neural response imaging can evaluate the integrity of implant electrodes and the status of the electrode–cochlea interface, but it must not be the sole way in which correct positioning of the array is confirmed. In our opinion, intra-operative radiological assessment is mandatory during cochlear implant surgery.

scholarly journals Factors contributing to clinically important health utility gains in cochlear implant recipients

2021 ◽  
Author(s):  
Lida Müller ◽  
Petra Graham ◽  
Jasmin Kaur ◽  
Josie Wyss ◽  
Paula Greenham ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Health Utility ◽  
Speech Understanding ◽  
Health Utilities Index ◽  
Important Health ◽  
Attribute Levels ◽  
The Impact

Abstract Purpose Cochlear implantation can restore access to sound and speech understanding in subjects with substantial hearing loss. The Health Utilities Index Mark III (HUI3) measures the impact of an intervention on the patient’s quality of life and is sensitive to changes in hearing. In the current study we used factor analysis to predict a clinically important gain in HUI3 scores in adult cochlear implant recipients. Methods Data were collected in an observational study for 137 adult recipients from a single center who had at least 1-year HUI3 follow-up. Demographic and other baseline parameters were retrospectively analyzed for their association with a clinically important HUI3 scale gain, defined as at least 0.1 points. Data were also collected for the speech spatial qualities (SSQ) scale. Results Baseline telephone use and HUI3 hearing, speech and emotion attribute levels were significantly associated with clinically important gains in HUI3 scores. However, SSQ scores increased significantly with or without clinically important HUI3 gains. Conclusion Those subjects who were unhappy or experienced difficulties communicating with strangers or in a group were twice as likely to obtain a clinically important gain in health utility compared to those who were happy or had less difficulty communicating. Subjects who were unable to use the telephone prior to cochlear implantation were one and a half times more likely to obtain a clinically important gain. The SSQ scale was more sensitive to hearing improvements due to cochlear implantation. An inability to use the telephone is an easy to assess biomarker for candidacy for cochlear implantation.

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