CT pre-operative planning of a new semi-implantable bone conduction hearing device

Law, Eric K. C.; Bhatia, Kunwar S.; Tsang, Willis S. S.; Tong, Michael C. F.; Shi, Lin

doi:10.1007/s00330-015-3983-x

Cited by 28 publications

(14 citation statements)

References 13 publications

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“…Thus, AP may be used as a parameter for preoperative evaluation, to remind the surgeon of the possibility of dural or sigmoid sinus exposure during preparation of the bone bed for BC-FMT. Eric K, et al found the use of Lifts, or sigmoid sinus or dural depression, necessary to accommodate the BC-FMT in the majority of cases, including most mastoid placements [33].…”

Section: Discussionmentioning

confidence: 99%

The effect of anatomical variables and use of the Lifts system on hearing outcomes after implantation of an active transcutaneous bone conduction device in bilateral congenital conductive hearing loss

Yang

Zhao

Liu

et al. 2020

Journal of Otolaryngology - Head & Neck Surgery

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Background: Malformations of the temporal bone present different challenges to the implantation of a transcutaneous active bone conduction device, such as Bonebridge (Med-el, Innsbruck, Austria). This study aims to describe the benefits of high-resolution computed tomography (HRCT) in preoperative assessment and to analyze whether characteristics of the mastoid process, intraoperative compression of the dura or sigmoid sinus, and the use of the Lifts system, lead to differences in audiological performance after implantation. Methods: We examined 110 cases of congenital microtia. The structure of the temporal bone was examined using HRCT and a 3D simulation software program. The mean anteroposterior mastoid bone thickness from the external auditory canal to the sigmoid sinus was measured (a measurement referred to as "AP", hereafter). Sound field threshold (SFT), speech reception threshold (SRT) in noise, and word recognition score (WRS) in quiet, before and after implantation, were also measured. Independent variables were recorded in all patients: mastoid type (well pneumatized or poorly pneumatized), the presence of dural or sigmoid sinus compression, and the use of the Lifts system. Results: We found that the mean AP in the non-compression group was 16.2 ± 2.3 mm and in the compression group, 13.1 ± 2.9 mm (p < 0.001). We analyzed the hearing improvement of patients grouped by mastoid development, dural or sigmoid sinus compression, and use of the Lifts system, and found that these factors did not interact and that they had no influence on the hearing outcomes (p > 0.05).

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Section: Discussionmentioning

confidence: 99%

The effect of anatomical variables and use of the Lifts system on hearing outcomes after implantation of an active transcutaneous bone conduction device in bilateral congenital conductive hearing loss

Yang

Zhao

Liu

et al. 2020

Journal of Otolaryngology - Head & Neck Surgery

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“…20 A pre-operative temporal bone computed tomography (CT) scan using three-dimensional software is used to accurately assess the most suitable position for the bone conduction floating mass transducer, which is localised to two positions: the retrosigmoid region or the sinodural angle (presigmoid region) according to different factors such as mastoid hypoplasia, previous mastoid surgery and sigmoid sinus exposure. 21 Many studies have reported positively on the efficacy, safety and acoustic benefit of the device in conductive hearing loss, mixed hearing loss and single-sided deafness. 22,23 Vogt et al suggested that the sound localisation abilities of children with congenital unilateral conductive hearing loss improved when acoustic stimuli were presented to the impaired (Bonebridge implanted) side.…”

Section: Introductionmentioning

confidence: 99%

Horizontal sound localisation and speech perception in Bonebridge-implanted single-sided deafness patients

et al. 2020

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Objective This study aimed to investigate the benefit of Bonebridge devices in patients with single-sided deafness. Method Five patients with single-sided deafness who were implanted with Bonebridge devices were recruited in a single-centre study. Participants’ speech perception and horizontal sound localisation abilities were assessed at 6 and 12 months post-operatively. Speech intelligibility in noisy environments was measured in three different testing conditions (speech and noise presented from the front, speech and noise presented from the front and contralateral (normal ear) side separately, and speech presented from the ipsilateral (implanted Bonebridge) side and noise from the contralateral side). Sound localisation was evaluated in Bonebridge-aided and Bonebridge-unaided conditions at different stimuli levels (65, 70 and 75 dB SPL). Results All participants showed a better capacity for speech intelligibility in quiet environments with the Bonebridge device. The speech recognition threshold with the Bonebridge device was significantly decreased at both short- and long-term follow up in the speech presented from the ipsilateral (implanted Bonebridge) side and noise from the contralateral side condition (p < 0.05). Additionally, participants maintained similar levels of sound localisation between the Bonebridge-aided and unaided conditions (p > 0.05). However, the accuracy of localisation showed some improvement at 70 dB SPL and 75 dB SPL post-operatively. Conclusion The Bonebridge device provides the benefit of improved speech perception performance in patients with single-sided deafness. Sound localisation abilities were neither improved nor worsened with Bonebridge implantation at the follow-up assessments.

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“…Therefore, detailed preoperative, CT-based surgical planning was recommended in those situations [ 2 , 6 , 7 , 12 , 13 , 15 , 17 , 20 , 22 , 27 – 30 , 34 ]. The introduction of BCI Lifts increased the probability that the BC-FMT could be fitted to the bone with 4‑mm lifts in up to 100% of patients older than 9 years [ 20 , 28 ].…”

Section: Discussionmentioning

confidence: 99%

“…Preoperatively, the temporal bone is evaluated to determine placement of the BC-FMT. Several methods and tools have been described for this task, varying from a detailed visual analysis and two-dimensional (2D) measurements of standard computed tomography (CT) scans to sophisticated planning tools and preoperative "virtual surgery" [2,6,7,12,13,15,17,[27][28][29][30]34].…”

Section: Surgical Techniquementioning

confidence: 99%

Implantation of a new active bone conduction hearing device with optimized geometry

Plontke

Götze

Wenzel

et al. 2020

HNO

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CT pre-operative planning of a new semi-implantable bone conduction hearing device

Abstract: • Preoperative temporal bone CT is essential for determining Bonebridge device suitability. • Mastoid under-pneumatisation and prior mastoidectomy predict a retrosigmoid Bonebridge position. • 3D simulation software is recommended for precise device positioning.

Cited by 28 publications

References 13 publications

The effect of anatomical variables and use of the Lifts system on hearing outcomes after implantation of an active transcutaneous bone conduction device in bilateral congenital conductive hearing loss

The effect of anatomical variables and use of the Lifts system on hearing outcomes after implantation of an active transcutaneous bone conduction device in bilateral congenital conductive hearing loss

Horizontal sound localisation and speech perception in Bonebridge-implanted single-sided deafness patients

Implantation of a new active bone conduction hearing device with optimized geometry

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