Three-Year Postimplantation Auditory Outcomes in Children with Sequential Bilateral Cochlear Implantation

Scherf, Fanny; Deun, Lieselot Van; Wieringen, Astrid Van; Wouters, Jan; Desloovere, Christian; Dhooge, Ingeborg; Offeciers, Erwin; Deggouj, Naïma; Raeve, Leo De; Wuyts, Floris L.; Heyning, Paul Van de

doi:10.1177/000348940911800504

Cited by 38 publications

(34 citation statements)

References 38 publications

(41 reference statements)

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“…Their results were in accordance with the results shown in the groups with short or no interimplant intervals studied by Gordon and Papsin [2009]. In contrast to the results in the long interimplant interval groups of Gordon and Papsin [2009], Scherf et al [2009] reported that children who received their second CI (CI2) relatively late in life ( 1 6 years of age) and after long periods of unilateral CI use eventually developed a significant bilateral advantage for speech recognition in quiet. For children who received the CI2 before the age of 6 years, bilateral advantages emerged more rapidly.…”

Section: Introductionsupporting

confidence: 89%

“…For children who received the CI2 before the age of 6 years, bilateral advantages emerged more rapidly. However, we cannot draw a firm conclusion on the cause of differences between the 2 groups studied by Scherf et al [2009]. As opposed to the younger age group, the older age group did not only receive the CI2 at a later stage in life, but also the age in receiving the first CI (CI1) was considerably higher.…”

Section: Introductionmentioning

confidence: 78%

“…Several studies have mentioned a bilateral benefit for speech recognition in quiet [Gordon and Papsin, 2009;Kühn-Inacker et al, 2004;Scherf et al, 2009]. Gordon and Papsin [2009] assessed the effect of interimplant interval on their results for speech recognition.…”

Section: Introductionmentioning

confidence: 99%

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Sequential Bilateral Cochlear Implantation in Children: Development of the Primary Auditory Abilities of Bilateral Stimulation

Sparreboom

Snik²,

Mylanus³

2010

Audiol Neurotol

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The advantages of sequential bilateral cochlear implantation were assessed in 29 children with a severe to profound hearing loss. The effect of age at second implantation and the effect of duration of bilateral implant use on the outcomes in speech perception and directional hearing were investigated. The children received their second cochlear implant at an age ranging from 2.8 to 8.5 years. Measurements were carried out preoperatively and postoperatively after 6, 12 and 24 months of bilateral implant use. A matched control group of 9 children with a unilateral implant were also measured over time and were compared with the study group after 12 and 24 months. Speech reception in both quiet and in noise and lateralization were measured. After 24 months, a minimum audible angle task was carried out. Bilateral advantages with regard to speech reception in quiet and in noise were already present after 6 months of bilateral implant use and improved thereafter. After 24 months, speech reception in noise had significantly improved with bilateral implants compared to that of children with a unilateral implant. The percentage of children that could accurately lateralize increased from 57% after 6 months to 83% after 24 months. With regard to the minimum audible angle task, loudspeakers were placed on average at ±42°. Age at second implantation did not have an influence on all outcomes. From the results it can be concluded that the advantages of bilateral hearing occur after sequential bilateral implantation and that age at second implantation does not influence the amount of bilateral advantage. Furthermore, it can be concluded that longer periods of bilateral implant use lead to greater bilateral advantages.

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Section: Introductionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 78%

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Sequential Bilateral Cochlear Implantation in Children: Development of the Primary Auditory Abilities of Bilateral Stimulation

Sparreboom

Snik²,

Mylanus³

2010

Audiol Neurotol

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“…The clinical evidence reported to date supports the electrophysiological findings. Children who receive bilateral implants sequentially when younger adapt more quickly Galvin & Hughes, in press;Scherf et al, 2009) and generally have better speech perception and sound localization outcomes than those implanted when older (Galvin et al, 2007a). …”

Section: Timing Of First and Second Cochlear Implants; Sequential Andmentioning

confidence: 99%

“…As with unilateral implants, factors such as age at time of first implant and amount of pre-operative auditory stimulation in the ear implanted second contribute to outcomes, with younger children and those with pre-implant hearing aid use achieving better results (Galvin et al, 2007a;Peters et al, 2007;Wolfe et al, 2007;Zeitler et al, 2008) . Consistency of device use also influences outcomes, with most children implanted at younger ages adapting more quickly and with greater ease to using bilateral implants, whether they are simultaneously or sequentially implanted (Galvin et al, 2008a;Scherf et al, 2009). Older sequentially implanted children and young adults (who are responsible for their own consistency of device use) must be highly self-motivated in order to persist with learning to use their second cochlear implant; this can be particularly difficult for children aged 7-12 years, especially if they have not been involved in the decisionmaking process (Galvin et al, 2009).…”

Section: Factors Affecting Outcomesmentioning

confidence: 99%

Cochlear Implants in Children: A Review

Sarant¹

2012

Hearing Loss

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Simultaneous bilateral cochlear implants: Developmental advances do not yet achieve normal cortical processing

et al. 2017

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BackgroundSimultaneous bilateral cochlear implantation promotes symmetric development of bilateral auditory pathways but binaural hearing remains abnormal. To evaluate whether bilateral cortical processing remains impaired in such children, cortical activity to unilateral and bilateral stimuli was assessed in a unique cohort of 16 children who received bilateral cochlear implants (CIs) simultaneously at 1.97 ± 0.86 years of age and had ~4 years of CI experience, providing the first opportunity to assess electrically driven cortical development in the absence of reorganized asymmetries from sequential implantation.MethodsCortical activity to unilateral and bilateral stimuli was measured using multichannel electro‐encephalography. Cortical processing in children with bilateral CIs was compared with click‐elicited activity in 13 normal hearing children matched for time‐in‐sound. Source activity was localized using the Time Restricted, Artefact and Coherence source Suppression (TRACS) beamformer method.ResultsConsistent with dominant crossed auditory pathways, normal P1 activity (~100 ms) was weaker to ipsilateral stimuli relative to contralateral and bilateral stimuli and both auditory cortices preferentially responded to the contralateral ear. Right hemisphere dominance was evident overall. Children with bilateral CIs maintained the expected right dominance but differences from normal included: (i) minimal changes between ipsilateral, contralateral and bilateral stimuli, (ii) weaker than normal contralateral stimulus preference, (iii) symmetric activity to bilateral stimuli, and (iv) increased occipital lobe recruitment during bilateral relative to unilateral stimulation. Between‐group contrasts demonstrated lower than normal activity in the inferior parieto‐occipital lobe (suggesting deficits in sensory integration) and greater than normal left frontal lobe activity (suggesting increased attention), even during passive listening.ConclusionsTogether, findings suggest that early simultaneous bilateral cochlear implantation promotes normal‐like auditory symmetry but that abnormalities in cortical processing consequent to deafness and/or electrical stimulation through two independent speech processors persist.

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Three-Year Postimplantation Auditory Outcomes in Children with Sequential Bilateral Cochlear Implantation

Cited by 38 publications

References 38 publications

Sequential Bilateral Cochlear Implantation in Children: Development of the Primary Auditory Abilities of Bilateral Stimulation

Sequential Bilateral Cochlear Implantation in Children: Development of the Primary Auditory Abilities of Bilateral Stimulation

Cochlear Implants in Children: A Review

Simultaneous bilateral cochlear implants: Developmental advances do not yet achieve normal cortical processing

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