TORP vs round window implant for hearing restoration of patients with extensive ossicular chain defect

Colletti, Vittorio; Carner, Marco; Colletti, Liliana

doi:10.1080/00016480802642070

Cited by 66 publications

(63 citation statements)

References 12 publications

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“…The first article on RW vibroplasty was published by Colletti et al [2009] describing the technique and the outcome in 7 patients and proposing a new rehabilitation alternative for mixed hearing losses. They reported that the highest gains were obtained at 1 and 2 kHz, where an overcorrection of the threshold often occurred.…”

Section: Discussionmentioning

confidence: 99%

“…Based on these data, and the ability of these devices to deliver amplified sound energy in the middle ear, the idea of placing the transducer close to the cochlea in case of abnormal middle ear emerged. Colletti et al [2009] described the first cases of VSB placed on the round window (RW), followed by other authors employing the VSB in a wide range of middle ear diseases such as otosclerosis with mixed hearing loss [Venail et al, 2009], stabilized chronic otitis media after tympanoplasty failure and aural atresia [Frenzel et al, 2009]. In mixed hearing loss, tympanoossicular chain reconstruction alone often fails to restore an optimal hearing and needs to be associated with a hearing aid.…”

Section: Introductionmentioning

confidence: 99%

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Functional Results of Vibrant Soundbridge Middle Ear Implants in Conductive and Mixed Hearing Losses

et al. 2011

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Objective: Our purpose was to evaluate the results of Vibrant Soundbridge (VSB) in conductive or mixed hearing loss. Materials and Methods: Twenty-five adult patients (29 ears) with a mixed or conductive hearing loss and various etiologies were included in this retrospective study. The preoperative ipsilateral pure tone average was 71 ± 3.0 dB, and the average bone conduction threshold was 42 ± 2.8 dB (n = 29). The transducer was placed on the long apophysis of the incus (n = 16), in the round window (n = 10) or on the stapes (n = 3). Results: No complications were noted. The bone conduction threshold remained unchanged. VSB was activated in all cases. The postoperative pure tone average without VSB was 63 ± 3.9 dB (n = 24) and with VSB in free-field condition 24 ± 2.1 dB (n = 22). Conclusions: VSB is safe and efficacious for auditory rehabilitation in conductive and mixed hearing losses.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functional Results of Vibrant Soundbridge Middle Ear Implants in Conductive and Mixed Hearing Losses

et al. 2011

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“…However, coupling the transducer to an ossicle is difficult in ears with middle ear disease, such as congenital aural atresia and ossicular malformation. An alternative way of coupling sound to the cochlea by driving the round window membrane (RWM), called reverse drive, was developed, and some preliminary studies on middle ear implantable devices have been reported (Colletti et al 2006(Colletti et al , 2009Kiefer et al 2006;Beltrame et al 2009;Linder et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Measurement of Basilar Membrane Motion During Round Window Stimulation in Guinea Pigs

Chen

Guan

Zhang

et al. 2014

JARO

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Driving the cochlea in reverse via the round window membrane (RWM) is an alternative treatment option for the hearing rehabilitation of a nonfunctional or malformed middle ear. However, cochlear stimulation from the RWM side is not a normal sound transmission pathway. The basilar membrane (BM) motion elicited by mechanical stimulation of the RWM is unknown. In this study, the BM movement at the basal turn was investigated in both reverse via RWM drive and acoustic stimulation in the ear canal or forward drive in postmortem isolated temporal bone preparations of guinea pigs. During reverse drive, a magnetcoil was coupled on RWM, and the BM vibration at the basal turn and the movement of the incus tip were measured with laser Doppler vibrometry. During forward drive, the vibration of the incus tip induced by sound pressure in the ear canal resulted in BM vibration and the BM movement at the same location as that in the reverse stimulation was measured. The displacement ratio of the BM to RWM in reverse drive and the ratio of the BM to incus in forward drive were compared. The results demonstrated that the BM response measured in both situations was similar in nature between forward and reverse drives. This study provides new knowledge for an understanding of BM movement induced by reverse drive via the RWM stimulation.

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“…However, current publications [Baumgartner et al, 2010;Boeheim et al, 2010;Colletti et al, 2006;Colletti et al, 2009;Cuda et al, 2009;Frenzel et al, 2009;Kiefer and Staudenmaier, 2010;Linder et al, 2009;Streitberger et al, 2009;Wollenberg et al, 2007] reveal a considerable variability regarding the degree of hearing restoration. To approach this issue, different methods of coupling an actuator to the RW membrane have been investigated in human temporal bone experiments [Arnold et al, 2010;Nakajima et al, 2010].…”

Section: Introductionmentioning

confidence: 99%

Conditions for Highly Efficient and Reproducible Round-Window Stimulation in Humans

Schraven¹,

Hirt²,

Goll³

et al. 2011

Audiol Neurotol

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Round-window stimulation is a new clinical approach for the application of active middle-ear implants. To investigate factors influencing the efficiency of round-window stimulation, experiments in 6 human temporal bones were performed with different actuator geometries and coupling conditions. The experiments show that the amplitude ratio between stapes and round-window actuator vibration is most efficient when using a 1.0-mm diameter rod with a 30° inclined tip geometry and an attached silicone pad. In this case, the amplitude ratio is 0.34 for frequencies up to 1.5 kHz and 0.27 for frequencies up to 20 kHz, with a standard deviation of only 4–6 dB at most frequencies. The analysis of data presented here and in a companion paper suggests that control of proper round-window membrane pretension as well as the inclined tip geometry are the major requirements for maximal performance.

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TORP vs round window implant for hearing restoration of patients with extensive ossicular chain defect

Abstract: Good functional results and stability at 36 months were obtained with both procedures. The extrusion rates for T-TORP were low. So far no extrusion has been observed for RWI. Hearing results were statistically much better for RWI vs T-TORP for all investigated parameters.

Cited by 66 publications

References 12 publications

Functional Results of Vibrant Soundbridge Middle Ear Implants in Conductive and Mixed Hearing Losses

Functional Results of Vibrant Soundbridge Middle Ear Implants in Conductive and Mixed Hearing Losses

Measurement of Basilar Membrane Motion During Round Window Stimulation in Guinea Pigs

Conditions for Highly Efficient and Reproducible Round-Window Stimulation in Humans

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