scholarly journals Evolution of impedance values in cochlear implant patients after early switch-on

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246545
Author(s):  
Jeff Jia-Fu Wei ◽  
Tao-Hsin Tung ◽  
Lieber Po-Hung Li
Keyword(s):  
Hearing Loss ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Treatment Modality ◽  
Longitudinal Design ◽  
The Past ◽  
Factors Influencing ◽  
Early Activation ◽  
Effective Treatment Modality ◽  
Underlying Mechanisms

Cochlear implantation is currently the most effective treatment modality for severe to profound sensorineural hearing loss. Over the past few years, at the Department of Otolaryngology, Cheng Hsin General Hospital (Taipei, Taiwan), cochlear implant devices have been switched on within 24 hours of their implantation. Differences in impedance evolution after early switch-on for different devices have not been previously discussed. The present study aimed to investigate the impedance evolution of one device and the factors influencing this after early activation. Results are compared to published results of other devices. A total of 16 patients who received Advanced BionicsTM devices and had early activation within 24 hours of implantation, were included in the study. Impedance telemetry was recorded intraoperatively and postoperatively at 1 day, 1 week, 2 weeks, 4 weeks and 8 weeks. A stepwise increase was observed in the impedance evolution. To the best of our knowledge, the present study is the first to investigate the impedance evolution of the different devices after early switch-on within 24 hours of implantation and its influencing factors. Further research with a longitudinal design to compare the differences in electrode impedances between patients activated early versus those activated after a few weeks will be necessary for the disclosure of the underlying mechanisms.

Impact of Cochlear Implantation on Neurocognitive Subdomains in Adult Cochlear Implant Recipients

2021 ◽  
pp. 1-10
Author(s):  
Christiane Völter ◽  
Lisa Götze ◽  
Imme Haubitz ◽  
Janine Müther ◽  
Stefan Dazert ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Verbal Fluency ◽  
Homogeneous Population ◽  
Delayed Recall ◽  
Hearing Status ◽  
Age Related ◽  
Significant Difference ◽  
The Impact

<b><i>Introduction:</i></b> Age-related hearing loss affects about one-third of the population worldwide. Studies suggest that hearing loss may be linked to cognitive decline and auditory rehabilitation may improve cognitive functions. So far, the data are limited, and the underlying mechanisms are not fully understood. The study aimed to analyze the impact of cochlear implantation on cognition in a large homogeneous population of hearing-impaired adults using a comprehensive non-auditory cognitive assessment with regard to normal-hearing (NH) subjects. <b><i>Material and Methods:</i></b> Seventy-one cochlear implant (CI) candidates with a postlingual, bilateral severe or profound hearing loss aged 66.3 years (standard deviation [SD] 9.2) and 105 NH subjects aged 65.96 years (SD 9.4) were enrolled. The computer-based neurocognitive tool applied included 11 subtests covering attention (M3), short- and long-term memory (recall and delayed recall), working memory (0- and 2-back, Operation Span [OSPAN] task), processing speed (Trail Making Test [TMT] A), mental flexibility (TMT B), inhibition (cFlanker and iFlanker), and verbal fluency. CI patients underwent a neurocognitive testing preoperatively as well as 12 months postoperatively. Impact of hearing status, age, gender, and education on cognitive subdomains was studied. Additionally, after controlling for education and age, cognitive performance of CI subjects (<i>n</i> = 41) was compared to that of NH (<i>n</i> = 34). <b><i>Results:</i></b> CI users achieved significantly better neurocognitive scores 12 months after cochlear implantation than before in most subtests (M3, [delayed] recall, 2-back, OSPAN, iFlanker, and verbal fluency; all <i>p</i> &#x3c; 0.05) except for the TMT A and B. A significant correlation could be found between the postoperative improvement in speech perception and in the attentional task M3 (<i>p</i> = 0.01). Hearing status (<i>p</i> = 0.0006) had the strongest effect on attention, whereas education had a high impact on recall (<i>p</i> = 0.002), OSPAN (<i>p</i> = 0.0004), and TMT A (<i>p</i> = 0.005) and B (<i>p</i> = 0.003). Inhibition was mainly age-dependent with better results in younger subjects (<i>p</i> = 0.016). Verbal fluency was predicted by gender as females outperformed men (<i>p</i> = 0.009). Even after controlling for age and education NH subjects showed a significantly better performance than CI candidates in the recall (<i>p</i> = 0.03) and delayed recall (<i>p</i> = 0.01) tasks. Postoperatively, there was no significant difference between the 2 groups anymore. <b><i>Conclusion:</i></b> Impact of cochlear implantation on neurocognitive functions differs according to the cognitive subdomains. Postoperatively, CI recipients performed as good as age- and education-matched NH subjects.

Cochlear Implant Patients with Superficial Siderosis

2009 ◽  
Vol 20 (06) ◽  
pp. 348-352 ◽  
Author(s):  
Sarah A. Sydlowski ◽  
Michael J. Cevette ◽  
Jon Shallop ◽  
David M. Barrs
Keyword(s):  
Central Nervous System ◽  
Hearing Loss ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Case Reports ◽  
Superficial Siderosis ◽  
Viable Option ◽  
Retrospective Case ◽  
Fatal Disease ◽  
The Central Nervous System

Background: Considered a rare disorder, superficial siderosis of the central nervous system (SSCN) has become more frequently diagnosed in recent years. As it is characterized by progressive sensorineural hearing loss, patients' needs may surpass the capability of hearing aid technology. Despite the retrocochlear nature of the disorder, patients have undergone cochlear implantation (CI) with varying success. Purpose: To summarize the issues surrounding cochlear implant candidates with SSCN as well as highlight trends in performance postimplantation. Research Design: Retrospective case reports of seven cochlear implant candidates detail the symptoms, typical audiologic presentation, and array of clinical issues for patients with this progressive and potentially fatal disease. Results: Despite the retrocochlear component of a hearing loss caused by SSCN, cochlear implantation may be a viable option. Conclusions: It is essential that the CI audiologist not only be aware of the disorder but also be well versed in the resulting implications for the cochlear implant process. A more thorough case history, an expanded candidacy test battery, and knowledge of the typical presentation of SSCN are critical. The diagnosis of SSCN will impact expectations for success with the cochlear implant, and counseling should be adjusted accordingly.

scholarly journals Complications of cochlear implant surgery

2004 ◽  
Vol 132 (9-10) ◽  
pp. 302-305 ◽  
Author(s):  
Rade Kosanovic ◽  
Zoran Ivankovic ◽  
Sandra Stojanovic
Keyword(s):  
Hearing Loss ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Fatal Outcome ◽  
Modern Technology ◽  
Hearing Impairments ◽  
Severe Hearing Loss ◽  
Cochlear Implant Surgery ◽  
Coding Strategies ◽  
The World

During the last several decades, cochlear implant has been fully recognized in treatment of severe hearing loss. Development of modern technology enabled inconceivable possibilities of technical qualities of the device as well as development of usable coding strategies, which led to extraordinary results in patient rehabilitation. Although cochlear implantation has become one of the routine operative procedures throughout the world nowadays, it gives rise to certain complications. These complications, though rare, can sometimes be very serious, even with fatal outcome. If cochlear implantation is performed by experienced and well-educated team of experts, the possibility of complications is minimal and is certainly not the argument against cochlear implantation as a method of treatment of severe hearing impairments.

Audiological outcome of stapes surgery for far advanced cochlear otosclerosis

2017 ◽  
Vol 131 (11) ◽  
pp. 961-964 ◽  
Author(s):  
C Heining ◽  
R Banga ◽  
R Irving ◽  
C Coulson ◽  
P Monksfield
Keyword(s):  
Hearing Loss ◽  
Cochlear Implant ◽  
Revision Surgery ◽  
Cochlear Implantation ◽  
Stapes Surgery ◽  
Hearing Thresholds ◽  
Suitable Treatment ◽  
Conductive Component ◽  
Clinically Significant ◽  
Hearing Outcomes

AbstractBackground:Patients with advanced otosclerosis can present with hearing thresholds eligible for cochlear implantation. This study sought to address whether stapes surgery in this patient group provides a clinically significant audiological benefit.Objectives:To assess pre- and post-operative hearing outcomes of patients with advanced otosclerosis, and to determine what proportion of these patients required further surgery including cochlear implantation.Methods:Between 2002 and 2015, 252 patients underwent primary stapes surgery at our institution. Twenty-eight ears in 25 patients were deemed to have advanced otosclerosis, as defined by pure audiometry thresholds over 80 dB. The patients’ records were analysed to determine audiological improvement following stapes surgery, and assess whether any further surgery was required.Results:The audiological outcome for most patients who underwent primary stapes surgery was good. A minority of patients (7 per cent) required revision surgery. Patients who underwent cochlear implantation after stapes surgery (10 per cent) also demonstrated a good audiological outcome.Conclusion:Stapes surgery is a suitable treatment option for patients with advanced otosclerosis, and should be considered mandatory, before offering cochlear implantation, for those with a demonstrable conductive component to their hearing loss. A small group of patients get little benefit from surgery and subsequently a cochlear implant should be considered.

Cochlear Implants in Children: Reliability of Computed Tomography

1992 ◽  
Vol 107 (3) ◽  
pp. 410-417 ◽  
Author(s):  
Michael A. Seicshnaydre ◽  
Michele H. Johnson ◽  
M. Suzanne Hasenstab ◽  
George H. Williams
Keyword(s):  
Computed Tomography ◽  
Hearing Loss ◽  
Cochlear Implant ◽  
Temporal Bone ◽  
Cochlear Implants ◽  
Cochlear Implantation ◽  
Ct Scans ◽  
Presurgical Evaluation ◽  
Preoperative Ct ◽  
Ct Studies

Preoperative temporal bone computed tomography (CT) can demonstrate anatomic details relevant to surgical management and is therefore essential in the presurgical evaluation of patients receiving cochlear implants. The purpose of this study was to evaluate preoperative CT studies and compare them to surgical findings in 34 children who received the Nucleus multichannel cochlear implant. The focus of this report is to discuss the dependability of CT scans in predicting surgical findings at the time of cochlear implantation. Results indicate that agreement of CT interpretations with surgical findings is partially related to the etiology of hearing loss and the experience of the surgeon and neuroradiologist. Advantages and limitations of the CT scans in predicting surgical findings are discussed.

scholarly journals Cochlear implant surgery at the Clinical Center of Vojvodina - ten-year experience

2014 ◽  
Vol 67 (suppl. 1) ◽  
pp. 25-31
Author(s):  
Dragan Dankuc ◽  
Darja Segan ◽  
Zoran Komazec ◽  
Ljiljana Vlaski ◽  
Slobodanka Lemajic-Komazec ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Facial Nerve ◽  
Cochlear Implant ◽  
Surgical Procedures ◽  
Cochlear Implantation ◽  
Facial Nerve Paralysis ◽  
Nerve Paralysis ◽  
Implant Surgery ◽  
Clinical Center ◽  
Cochlear Implant Surgery

Introduction. The first cochlear implant surgery was performed at the Center for Cochlear Implantation of the Department of Ear, Nose and Throat Diseases, Clinical Center of Vojvodina in 2002 after long preparations and that was the first successful cochlear implantation in Serbia. Material and Methods. Over the period from November 2002 to November 2013, 99 patients underwent surgical procedures and 100 cochlear implants were placed. Results. The analysis encompassed 99 patients, the youngest and the oldest one being 1 year and 61 years old, respectively. Prelingual and postlingual deafness developed in 84 (84.9%) and in 15 (15.1%), respectively. Postlingual deafness was observed in all 11 adult patients. The prelingual deafness was diagnosed in 84 (95.4%) children, whereas in four (4.6%) children it occurred after the development of speech between 6 and 8 years of age. Progressive hearing loss was observed in 11 patients - seven adults and four children. The majority of our patients, i.e. 74 (74.75%) manifested idiopathic deafness of unknown cause. A range of usually reported hearing loss etiologies included ototoxic medications in seven (7.07%), hereditary factor in six (6.06%), and bacterial meningitis in four (4.04%) patients. Somewhat less common causes were perinatal hypoxia in three (3.03%), premature birth in three (3.03%), Down syndrome in one (1.01%), and chronic otitis media in one (1.01%) patient. Conclusion. Both intraoperative and postoperative complications were analyzed in the investigated patient population. The complications developed in 11 patients, i.e. in 10.5% of 105 surgical procedures. The majority of procedures (89.5%) were not accompanied by any post-surgical complications. Unsuccessful implantation in a single-step procedure and transient facial nerve paralysis can be considered most frequent among our patients, whereas cochlear ossification and transient ataxia occurred more rarely. Stimulation of facial nerve, intraoperative perilymph liquid gusher, device failure and late infections were recorded extremely rarely.

scholarly journals Current criteria for selecting cochlear implant in deaf patients: a review

2021 ◽  
Vol 9 (1) ◽  
pp. 50
Author(s):  
Santosh Kumar Swain
Keyword(s):  
Hearing Loss ◽  
Cochlear Implant ◽  
Neural Plasticity ◽  
Cochlear Implantation ◽  
Surgical Techniques ◽  
Low Frequency ◽  
Hearing Preservation ◽  
Electrode Arrays ◽  
Profound Hearing Loss ◽  
Unilateral Deafness

Cochlear implantation is indicated in patients with severe to profound hearing loss that cannot be adequately treated by other auditory rehabilitation measures. The definitive indication of cochlear implantation is made on the basis of an extensive interdisciplinary clinical, audiological, radiological, and psychological diagnostic work-up. There are numerous changes are happening in cochlear implant candidacy. These have been associated with concomitant changes in surgical techniques, which enhanced the utility and safety of cochlear implantation. Currently, cochlear implants are approved for individuals with severe to profound unilateral hearing loss rather than previously needed for bilateral profound hearing loss. Studies have begun using the short electrode arrays for shallow insertion in patients with low-frequency residual hearing loss. The advancement in designs of the cochlear implant along with improvements in surgical techniques reduce the complications and result in the safety and efficacy of the cochlear implant which further encourages the use of these devices. This review article aims to discuss the new concepts in the candidacy of the cochlear implant, cochlear implant in younger children and hearing preservation, a cochlear implant for unilateral deafness, bilateral cochlear implant, and cochlear implant with neural plasticity and selection of patients for the cochlear implant.

scholarly journals Giant genital wart in pregnancy: cryotherapy as a spray of hope

2020 ◽  
Vol 6 (3) ◽  
pp. 423
Author(s):  
Vivekananda Ittigi ◽  
Gouhare Afshan
Keyword(s):  
Effective Treatment ◽  
Liquid Nitrogen ◽  
Treatment Modality ◽  
Genital Wart ◽  
Pregnant Patient ◽  
Genital Warts ◽  
Pregnant Female ◽  
The Past ◽  
Effective Treatment Modality ◽  
In Pregnancy

<p>Giant genital warts are caused by (HPV) type 6 and 11. Genital warts in pregnancy pose a treatment challenge. Here we report a case of 19 years pregnant patient treated with cryotherapy. A 19 years mid-term pregnant female presented with complaints of mild itchy increasing growth over the genitalia, in the past 20 days. Examination revealed a pinkish solitary cauliflower like growth over labia majora. The patient was treated with liquid nitrogen cryotherapy with each cycle of freeze and thawing for 15 seconds each for 12 weeks, the lesion almost regressed. Cryotherapy is a safe, easy and effective treatment modality in pregnancy.</p>

scholarly journals Cochlear implantation restores cortical processing for spatial hearing in asymmetric hearing loss

2021 ◽  
Author(s):  
Chadlia Karoui ◽  
Kuzma Strelnikov ◽  
Pierre Payoux ◽  
Anne-Sophie Salabert ◽  
Chris James ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Cochlear Implant ◽  
Cochlear Implantation ◽  
Spatial Hearing ◽  
Cortical Activity ◽  
Asymmetry Index ◽  
Hemispheric Dominance ◽  
Sound Localisation ◽  
Monaural Stimulation ◽  
Asymmetric Hearing Loss

In asymmetric hearing loss (AHL), the normal pattern of contralateral hemispheric dominance for monaural stimulation is modified, with a shift towards the hemisphere ipsilateral to the better ear. The extent of this shift has been shown to relate to sound localisation deficits. In this study, we examined whether cochlear implantation to treat AHL can restore the normal functional pattern of auditory cortical activity and whether this relates to improved sound localisation. We recruited 10 subjects with a cochlear implant for AHL (AHL-CI) and 10 normally-hearing controls. The participants performed a voice/non-voice discrimination task with binaural and monaural presentation of the sounds, and the cortical activity was measured using positron emission tomography (PET) brain imaging with a H215O tracer. The auditory cortical activity was found to be lower in the AHL-CI participants for all of the conditions. A cortical asymmetry index was calculated and showed that a normal contralateral dominance was restored in the AHL-CI patients for the non-implanted ear, but not for the ear with the cochlear implant. It was found that the contralateral dominance for the non-implanted ear strongly correlated with sound localisation performance (rho = 0.8, p < 0.05). We conclude that the restoration of binaural mechanisms in AHL-CI subjects reverses the abnormal lateralisation pattern induced by the deafness, and that this leads to improved spatial hearing. Our results suggest that cochlear implantation fosters the rehabilitation of binaural excitatory/inhibitory cortical interactions, which could enable the reconstruction of the auditory spatial selectivity needed for sound localisation.

scholarly journals Migration of Cochlear Implant Magnets after Head trauma in an Adult and a Child

2007 ◽  
Vol 86 (10) ◽  
pp. 612-613 ◽  
Author(s):  
Robert J. Stokroos ◽  
Pirn van Dijk
Keyword(s):  
Wound Healing ◽  
Hearing Loss ◽  
Cochlear Implant ◽  
Sensorineural Hearing Loss ◽  
Effective Treatment ◽  
Cochlear Implants ◽  
Head Trauma ◽  
Cochlear Implantation ◽  
Proper Place ◽  
Device Failure

Cochlear implantation is considered to be a safe and effective treatment for severe to profound sensorineural hearing loss. Device failures are rare. We report the cases of 2 patients—a 44-year-old woman and a 3-year-old boy—with cochlear implants who were referred to our tertiary cochlear implant center for treatment of magnet migration secondary to mild head trauma. The migration had led to device failure in both cases. Surgical re-exploration was performed with nonmagnetic instruments, and both magnets were easily returned to their proper place. Postoperatively, implant function was restored to previous levels, and wound healing was uncomplicated. The incidence of magnet migration in cochlear implant patients is unknown. A few cases have been reported in children, but to the best of our knowledge, ours is the first report of magnet migration in an adult.

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