Air-Bone Gap Component of Inner-Ear Origin in Audiograms of Cochlear Implant Candidates

Attias, Joseph; Ulanovski, David; Shemesh, Rafael; Kornreich, Liora; Nageris, Ben I.; Preis, Michal; Peled, M.; Efrati, Michal; Raveh, Eyal

doi:10.1097/mao.0b013e3182544cba

Cited by 10 publications

(11 citation statements)

References 21 publications

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“…This study confirms previous findings that the ABG was the largest in patients with LVA at lower frequencies [13,20,21] .…”

Section: Discussionsupporting

confidence: 82%

“…An examination of the literature studies revealed that the hearing loss associated with IP-II and LVA malformations is heterogeneous, and the conductive component is not associated with middle ear pathologies [2,12,13,17,18,[20][21][22][23][24][25][26] . Roesch et al [25] found that patients with IP-II and isolated LVA malformations were diagnosed not only with severe to profound hearing loss but also with moderate asymmetrical hearing loss.…”

Section: Discussionmentioning

confidence: 99%

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Audiological and Radiological Characteristics in Incomplete Partition Malformations

Batuk¹,

Çınar²,

Özgen³

et al. 2017

Int Adv Otol

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OBJECTIVE:To compare the audiological and radiological findings of patients with incomplete partition malformations (IPs) and analyze the relationship between the audiological and radiological findings. MATERIALS and METHODS:The study included 84 patients (168 ears) with IPs as follows: 26 patients with Type I;IP-I (41 ears), 54 patients with Type II;IP-II (108 ears), and 4 patients with Type III;IP-III (8 ears). Remaining 11 ears were diagnosed with other inner ear malformations. Air and bone conduction thresholds were determined with pure tone audiometry, and the air bone gap was recorded in all patients with IPs. Magnetic resonance imaging studies and computerized tomography scans of the temporal bones were analyzed using the PACS system of our university. RESULTS:It was found that all the ears with IP-I were diagnosed with severe to profound hearing loss. The degree of the hearing loss varied from mild to severe/profound in patients with IP-II. Severe to profound mixed hearing loss (MHL) was determined in all ears with IP-III. The air bone gap was larger in the lower frequencies in the IP-II cases diagnosed with MHL. There was not a significant difference between the air bone gap and the size of the vestibular aqueduct in ears with IP-II (p>0.05).CONCLUSION: Each type of IP has different audiological findings. Depending on the type and degree of the hearing loss, it is possible to choose the appropriate audiological intervention. Patients with IP should be evaluated according to the type of malformation.

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“…This study confirms previous findings that the ABG was the largest in patients with LVA at lower frequencies [13,20,21] .…”

Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Audiological and Radiological Characteristics in Incomplete Partition Malformations

Batuk¹,

Çınar²,

Özgen³

et al. 2017

Int Adv Otol

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“…Participants included patients who underwent cochlear implant surgery at a tertiary university-affiliated medical center in 2000-2012. On the basis of previous findings that patients before and after cochlear implantation may have an ABG in the presence of a normal middle ear [6], and the limitation of BC measurements in severe-to-profound hearing loss, we restricted the study group to patients with a known ABG of [10 dB for at least three consecutive frequencies (250, 500, 1,000 Hz) who were able to cooperate during behavioral audiometry. Only those in whom BC thresholds could be reliably masked were included.…”

Section: Setting and Patientsmentioning

confidence: 99%

“…The study was approved by the institutional ethics committee (approval number 6184; 2012). The preoperative findings in some of the participants were presented in our earlier study [6].…”

Section: Setting and Patientsmentioning

confidence: 99%

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Pattern of hearing loss following cochlear implantation

Raveh

Attias

Nageris

et al. 2014

Eur Arch Otorhinolaryngol

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Cochlear implantation is associated with deterioration in hearing. Despite the fact that the damage is presumed to be of sensory origin, residual hearing is usually assessed by air-conduction thresholds alone. This study sought to determine if surgery may cause changes in air- and bone-conduction thresholds producing a mixed-type hearing loss. The sample included 18 patients (mean age 37 years) with an air-bone gap of 10 dB over three consecutive frequencies and measurable masked and reliable bone-conduction thresholds of operated and non-operated ears who underwent cochlear implant surgery. All underwent comprehensive audiologic and otologic assessment and imaging before and after surgery. The air-bone gap in the treated ears was 17-41 dB preoperatively and 13-59 dB postoperatively over 250-4,000 Hz. Air-conduction thresholds in the treated ears significantly deteriorated after surgery, by a mean of 10-21 dB. Bone-conduction levels deteriorated nonsignificantly by 0.8-7.5 dB. The findings indicate that the increase in air-conduction threshold after cochlear implantation accounts for most of the postoperative increase in the air-bone gap. Changes in the mechanics of the inner ear may play an important role. Further studies in larger samples including objective measures of inner ear mechanics may add information on the source of the air-bone gap.

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Cochlear implantation via round window or cochleostomy: Effect on hearing in an animal model

et al. 2016

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Air-Bone Gap Component of Inner-Ear Origin in Audiograms of Cochlear Implant Candidates

Abstract: In cochlear implant candidates, the presence of a third window could cause an ABG because of stapes motion-induced shunting of acoustic energy outside the cochlear duct in response to air-conducted stimuli while bone conduction is preserved.

Cited by 10 publications

References 21 publications

Audiological and Radiological Characteristics in Incomplete Partition Malformations

Audiological and Radiological Characteristics in Incomplete Partition Malformations

Pattern of hearing loss following cochlear implantation

Cochlear implantation via round window or cochleostomy: Effect on hearing in an animal model

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