Communication Development in Children Who Receive the Cochlear Implant Younger than 12 Months: Risks versus Benefits

Dettman, Shani; Pinder, Darren; Briggs, Robert; Dowell, Richard C.; Leigh, Jaime

doi:10.1097/aud.0b013e31803153f8

Cited by 337 publications

(291 citation statements)

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“…This is reflected in all the areas of speech and language development. These children can achieve performance comparable to their normal hearing counter parts if implanted within 2 years of age [4,5,[36][37][38]. Early identification of hearing deficit is the most important and key factor for timely intervention in the management of congenitally hearing impaired population.…”

Section: Discussionmentioning

confidence: 99%

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Pediatric Cochlear Implantation—Why the Delay

Kothari

Keshree

Bhatnagar³

2015

Indian J Otolaryngol Head Neck Surg

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The aim of the study was to evaluate the factors that act as barriers and delay the process of cochlear implantation in children with congenital profound sensorineural hearing loss. This is a cross sectional observational study in which 154 children with profound sensorineural deafness attending ENT outdoor from Jan 2013 to June 2014 at Sri Aurobindo Institute of Medical College and PG Institute, Indore, were included in the study. Information was taken from the parents of the candidates regarding the reasons for the delay in reporting, the delay in intervention and a detailed history was also taken to evaluate the possible reason for the hearing loss with the help of open ended questions. The most common cause for the delay in reporting was lack of information about the availability of technique and procedure for cochlear implant. Financial constrain was the most common cause for the delay in getting the cochlear implant surgery.

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Section: Discussionmentioning

confidence: 99%

“…With the increasing evidence of the safety of cochlear implant surgery in infants increasing number of younger infants are receiving implants [4][5][6]. After locomotor disability in India deafness is the second most common form of disability [7].…”

Section: Introductionmentioning

confidence: 99%

Pediatric Cochlear Implantation—Why the Delay

Kothari

Keshree

Bhatnagar³

2015

Indian J Otolaryngol Head Neck Surg

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“…Further, thousands of very young deaf children, including congenitally deaf infants, now are receiving CIs (Dettman et al, 2007). Although it is encouraging that many children with CIs eventually can be mainstreamed into public education settings, it is also important to recognize that many pediatric CI users lag far behind in language development (Ponton et al, 1996;Svirsky et al, 2000;Geers, 2004;Nicholas and Geers, 2007), and some children cannot even discriminate between the most basal and most apical electrodes of their implants (Dawson et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Factors influencing neurotrophic effects of electrical stimulation in the deafened developing auditory system

et al. 2008

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Research in animal models has demonstrated that electrical stimulation from a cochlear implant (CI) may help prevent degeneration of the cochlear spiral ganglion (SG) neurons after deafness. In cats deafened early in life, effective stimulation of the auditory nerve with complex signals for several months preserved a greater density of SG neurons in the stimulated cochleae as compared to the contralateral deafened ear. However, SG survival was still far from normal even with early intervention with an implant. Thus, pharmacologic agents and neurotrophic factors that might be used in combination with an implant are of great interest. Exogenous administration of GM1 ganglioside significantly reduces SG degeneration in deafened animals studied at 7-8 weeks of age, but after several months of stimulation, GM1-treated animals show only modestly better preservation of SG density compared to age-matched non-treated animals. A significant factor influencing neurotrophic effects in animal models is insertion trauma, which results in significant regional SG degeneration. Thus, an important goal is to further improve human CI electrode designs and insertion techniques to minimize trauma.Another important issue for studies of neurotrophic effects in the developing auditory system is the potential role of critical periods. Studies examining animals deafened at 30 days of age (rather than at birth) have explored whether a brief initial period of normal auditory experience affects the vulnerability of the SG or cochlear nucleus (CN) to auditory deprivation. Interestingly, SG survival in animals deafened at 30-days was not significantly different from age-matched neonatally deafened animals, but significant differences were observed in the central auditory system. CN volume was significantly closer to normal in the animals deafened at 30 days as compared to neonatally deafened animals. However, no difference was observed between the stimulated and contralateral CN volumes in either deafened group. Measurements of AVCN spherical cell somata showed that after later onset of deafness in the 30-day deafened group, mean cell size was significantly closer to normal than in the neonatally deafened group. Further, electrical stimulation elicited a significant increase in spherical cell size in the CN ipsilateral to the implant as compared to the contralateral CN in both deafened groups.Neuronal tracer studies have examined the primary afferent projections from the SG to the CN in neonatally deafened cats. CN projections exhibit a clear cochleotopic organization despite severe auditory deprivation from birth. However, when normalized for the smaller CN size after deafness, projections were 30-50% broader than normal. After unilateral electrical stimulation there was no difference between projections from the stimulated and non-stimulated ears. These findings suggest that early normal auditory experience may be essential for the normal development (or subsequent Publisher's Disclaimer: This is a PDF file of an unedited manuscript...

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“…КИ является единственным эффективным методом восстановления слуха после поражения улитки при БМ. Необходимо помнить о том, что в РК существуют стандарты КИ у детей с НСТ слуха [33][34][35][36][37], согласно которым, пациенты, имеющие тяжелую степень тугоухости или глухоту после БМ, оперируются в срочном порядке [38].…”

Section: результаты и обсуждениеunclassified

Sensorineural hearing loss after bacterial meningitis in children

Seidullayeva

Zhaxylykova

Bayesheva³

et al. 2017

J CLIN MED KAZ

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Sensorineural hearing loss -form of hearing loss up to its total lossat which any of the sites of the sound-receiving part can be damaged. The most important problem of patients with sensorineural hearing loss is lack of effective treatment and inability to restore hearing because 80% of patients who suffered from bacterial meningitis loss of hearing is accompanied by ossification of internal ear structures. However, bacterial meningitis is still registered in Kazakhstan and is a reason of development of sensorineural hearing loss and often accompanied byossification of internal ear structures in children and adults leading to longterm neurological lesions, such as hearing impairments or hearing loss. For early diagnosis of hearing loss in children with bacterial meningitis, an audiological examination should be performed in the first 48 hours from the onset of the diseaseand after discharge from the hospital for 1 year. To date, the only effective method of hearing restoration is surgery -cochlear implantation. This review of the literature is devoted to one of the actual complications of bacterial meningitis -sensorineural deafness in children.Keywords: bacterial meningitis, sensorineural hearing loss, children, S.pneumoniae, H.influenzae, N.meningitidis. ТҰЖЫРЫМДАМАНейросенсорлық кереңдік-естуді қабылдайтын анализатордың қандай да бір бөлімінің зақымдалу әсерінен есту қабілетінің толық жоғалуы. Нейросенсорлық кереңдікпен сыртқаттанған науқастастардың негізгі мәселесі тиімді емнің болмауы және есту қабілетін қалыпқа келтірудің қиындығы болып табылады. Өйткені, бактериалдық менингитпен ауырған 80% науқастарда естудің жоғалуы ішкі құлақ осси-фикациясымен байқалады. Бірақ, Қазақстанда бактериалдық менингит аурушаңдылығы әлі де тіркеледі және балалар мен ересектерде нейросенсорлық кереңдіктің себебі болып табылады, сонымен қатар ұзақ мерзімді есту қабілетінің төмендеуі немесе естудің жоғалуы сияқты неврологиялық асқынуларға алып келеді. Балалардағы бактериалдық менингиттен кейінгі есту қабілетінің жоғалуын ерте анықтау үшін, аурудың басталуынан бастап алғашқы 48 сағатта және ауруханадан емделіп шыққаннан кейін 1 жыл ішінде аудиологиялық тексе-ру жүргізу қажет. Қазіргі таңда естуді қалпына келтірудің ең тиімді әдісі ота арқылы -кохлеарлы имплантацияны жасау болып табылады. Берілген әдебиетке шолуда балалардағы бактериальдық менингиттен кейінгі негізгі асқынулардың бірі нейросенсорлықкереңдікке арналған.Маңызды сөздер: бактериалдық менингит, нейросенсорлық кереңдік, балалар, пневмококк, гемофилдік таяқша, менингококк. .

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Communication Development in Children Who Receive the Cochlear Implant Younger than 12 Months: Risks versus Benefits

Cited by 337 publications

References 38 publications

Pediatric Cochlear Implantation—Why the Delay

Pediatric Cochlear Implantation—Why the Delay

Factors influencing neurotrophic effects of electrical stimulation in the deafened developing auditory system

Sensorineural hearing loss after bacterial meningitis in children

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