Neural Response Telemetry and Auditory/Nonauditory Sensations in 15 Recipients of Auditory Brainstem Implants

2005 ◽  
Vol 16 (04) ◽  
pp. 219-227 ◽  
Author(s):  
Steven R. Otto ◽  
Michael D. Waring ◽  
Johannes Kuchta
Keyword(s):  
Neuronal Activity ◽  
Vestibular Schwannoma ◽  
Electrode Array ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Neural Response ◽  
Neural Response Telemetry ◽  
Auditory Brainstem Implants ◽  
Sound Processor

Auditory brainstem implants (ABIs) provide a means of restoring some hearing sensations to individuals with neurofibromatosis type 2 (NF2) who are deaf after vestibular schwannoma removal. In this study, neural response telemetry (NRT) was used to record electrically evoked neuronal activity near the ABI electrode array in 15 such subjects. Our interest was to investigate whether NRT recordings from the brainstem might be useful in implanting or programming ABIs. We therefore sought relationships between postoperative NRT recordings and the sensations reported by the subjects in response to the test stimuli. However, no clear relationships among these variables were found, and it was not possible to differentiate recordings associated with auditory versus nonauditory sensations. The findings suggest that the categorization of NRT recordings used in this study is inappropriate for assisting with placement of an ABI electrode array intra-operatively or for programming the sound processor postoperatively.

Speech Perception in Auditory Brainstem Implants in Neurofibromatosis Type 2

2012 ◽  
Vol 73 (S 02) ◽  
Author(s):  
C. Matthies ◽  
R. Mlynski ◽  
S. Brill ◽  
J. Mueller ◽  
C. Varallyay ◽  
...  
Keyword(s):  
Speech Perception ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Neurofibromatosis Type 2 ◽  
Auditory Brainstem Implants

scholarly journals Combined translabyrinthine, anterior petrosal approach for resection of collision vestibular schwannoma and petrous apex meningioma in neurofibromatosis type 2, with auditory brainstem implant placement

2021 ◽  
Vol 5 (2) ◽  
pp. V17
Author(s):  
Usman A. Khan ◽  
Jillian H. Plonsker ◽  
Rick A. Friedman ◽  
Marc S. Schwartz
Keyword(s):  
Vestibular Schwannoma ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Neurofibromatosis Type 2 ◽  
Petrous Apex ◽  
Surgical Decision ◽  
Implant Placement ◽  
History Of ◽  
Sporadic Tumors

The natural history of neurofibromatosis type 2 (NF2) is profound bilateral hearing loss. The decision to pursue microsurgery may be more complicated in NF2 than with sporadic tumors. Schwannomas in NF2 often occur with other skull base tumors. Treatment should be tailored to preserve auditory perception for as long as possible. The authors present the case of a man with NF2 and a vestibular schwannoma who has poor hearing on the same side as a large petrous apex meningioma, both opposite to a well-hearing ear. This case highlights surgical decision-making and technical nuances during resection of collision tumors in NF2. The video can be found here: https://stream.cadmore.media/r10.3171/2021.7.FOCVID21130

Update of ABI Outcomes in Non-tumor Adults

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P61-P62
Author(s):  
Vittorio Colletti ◽  
Robert V. Shannon ◽  
Marco Carner ◽  
Sheila Veronese ◽  
Liliana Colletti
Keyword(s):  
Cochlear Implant ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Tumor Patients ◽  
Open Set ◽  
Sound Detection ◽  
The Difference ◽  
Auditory Brainstem Implants ◽  
Hearing Outcomes

Objective The traditional indication for auditory brainstem implants (ABIs) is neurofibromatosis type 2 (NF2) in subjects older than 12 years. In our department, the indications for ABIs have been extended to non-tumor children and adults with cochlear or cochlear nerve injuries or malfunctions who would not benefit from a cochlear implant. The results obtained in non-tumor adults are reported in this study. Methods In our department, from April 1997 to February 2008, ABIs have been implanted in a total of 114 patients (83 adults and 31 children) for different tumor and non-tumor diseases. 15 patients out of 114 have elsewhere previously had a CI with no sound detection. The retrosigmoid-transmeatal approach was used in all tumor patients and the retrosigmoid approach was used in all non-tumor patients. Results All patients had a functioning implantation, and reported auditory sensations with activation of various numbers of electrodes. At 1 year after implantations, non-tumor adults scored from 10% to 100% in open set speech perception tests (average 57%), and tumor patients scored from 5% to 30% (average 11%). The difference between these results is statistically significant (p < 0.01). Conclusions Hearing outcomes are better in non-tumor than tumor patients, with a significant number of non-tumor patients that are able to understand speech at a level comparable to that of the most successful cochlear implant users, including conversational telephone use.

scholarly journals Cochlear Implantation in Patients with Neurofibromatosis Type 2 and Patients with Vestibular Schwannoma in the Only Hearing Ear

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Erika Celis-Aguilar ◽  
Luis Lassaletta ◽  
Javier Gavilán
Keyword(s):  
Cochlear Implants ◽  
Vestibular Schwannoma ◽  
Cochlear Implantation ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Neurofibromatosis Type 2 ◽  
Environmental Sound ◽  
Auditory Brainstem Implant ◽  
Surgical Option

Cochlear implants are a new surgical option in the hearing rehabilitation of patients with neurofibromatosis type 2 (NF2) and patients with vestibular schwannoma (VS) in the only hearing ear. Auditory brainstem implant (ABI) has been the standard surgical treatment for these patients. We performed a literature review of patients with NF2 and patients with VS in the only hearing ear. Cochlear implantation (CI) provided some auditory benefit in all patients. Preservation of cochlear nerve integrity is crucial after VS resection. Results ranged from environmental sound awareness to excellent benefit with telephone use. Promontory stimulation is recommended although not crucial. MRI can be performed safely in cochlear implanted patients.

scholarly journals Auditory Brainstem Implants in Neurofibromatosis Type 2: Early and Long-term Results

2017 ◽  
Vol 78 (S 01) ◽  
pp. S1-S156
Author(s):  
Cordula Matthies ◽  
Goetz Gelbrich ◽  
Robert Mlynski ◽  
Rudolf Hagen ◽  
Wafaa Shehata-Dieler
Keyword(s):  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Neurofibromatosis Type 2 ◽  
Long Term Results ◽  
Auditory Brainstem Implants

Hearing restoration with auditory brainstem implants after radiosurgery for neurofibromatosis Type 2

2001 ◽  
Vol 95 (6) ◽  
pp. 1028-1033 ◽  
Author(s):  
Michel Kalamarides ◽  
Alexis Bozorg Grayeli ◽  
Didier Bouccara ◽  
Emmanuelle Ambert Dahan ◽  
Wolf Peter Sollmann ◽  
...  
Keyword(s):  
Radiation Treatment ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Neurofibromatosis Type 2 ◽  
Sound Recognition ◽  
Tumor Removal ◽  
Environmental Sound ◽  
Content Type ◽  
Auditory Brainstem Implants

✓ The auditory brainstem implant (ABI) is designed to restore useful auditory sensations in patients with neurofibromatosis Type 2 (NF2). The implantation is usually performed at the time of tumor removal in patients who do not undergo radiation treatment. The authors evaluated the performance of ABIs in three patients with NF2 in whom vestibular schwannoma continued to grow after radiation treatment. These three patients with NF2 received a 21-channel ABI; a translabyrinthine approach was used for both the tumor removal and the ABI placement. The interval between radiosurgery and the tumor removal plus device implantation ranged from 2 to 11 years. In all cases, the tumor was growing and the patients presented with total deafness. The mean number of active electrodes in these three patients was equivalent to the average results reported in other patients who received ABIs. The patients in this study used the ABI regularly for everyday life and obtained useful levels of environmental sound recognition. It is concluded that hearing function can be rehabilitated using ABIs in patients with NF2, even if radiosurgery fails to control the tumor growth.

scholarly journals Auditory Brainstem Implants

2010 ◽  
Vol 2 (2) ◽  
pp. 151-155 ◽  
Author(s):  
Mohan Kameswaran ◽  
S Raghunandhan
Keyword(s):  
Cochlear Nucleus ◽  
Fourth Ventricle ◽  
World Literature ◽  
Tumor Resection ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Current Status ◽  
Cochlear Nerve Aplasia ◽  
Auditory Brainstem Implants

Abstract Auditory brainstem implants (ABIs) are currently indicated for patients with neurofibromatosis type 2 (NF-2) tumors involving both vestibulocochlear nerves. The ABI helps bypass the damaged cochlear nerves and stimulates the cochlear nucleus in the brainstem directly thereby restoring auditory sensation. The implant is usually placed in the lateral recess of the fourth ventricle after tumor resection. The indications for ABI have recently expanded onto even nontumoral cases, such as congenital bilateral cochlear nerve aplasia. In such cases, the ABI helps bypass the nonfunctioning hypoplastic or absent cochlear nerves and stimulates the cochlear nucleus directly thereby restoring auditory sensation. This article reviews the nuances of this sophisticated implant, shares our experience with auditory brainstem implantation and its current status in world literature.

Auditory brainstem implants in neurofibromatosis Type 2: is open speech perception feasible?

2014 ◽  
Vol 120 (2) ◽  
pp. 546-558 ◽  
Author(s):  
Cordula Matthies ◽  
Stefan Brill ◽  
Csanad Varallyay ◽  
Laszlo Solymosi ◽  
Goetz Gelbrich ◽  
...  
Keyword(s):  
Speech Perception ◽  
Word Recognition ◽  
Tumor Volume ◽  
Neurofibromatosis Type ◽  
Auditory Brainstem ◽  
Neurofibromatosis Type 2 ◽  
Open Set ◽  
Auditory Mode ◽  
Auditory Brainstem Implants

Object Patients with bilateral auditory nerve destruction may perceive some auditory input with auditory brainstem implants (ABIs). Despite technological developments and trials in new stimulation sites, hearing is very variable and of limited quality. The goal of this study was to identify advantageous and critical factors that influence the quality of auditory function, especially speech perception. Methods The authors conducted a prospective study on ABI operations performed with the aid of multimodality neuromonitoring between 2005 and 2009 in 18 patients with neurofibromatosis Type 2. Outcome was evaluated by testing word recognition (monotrochee-polysyllabic word test at auditory-only mode [MTPa]) and open speech perception (Hochmair-Schulz-Moser [HSM] sentence test), both in pure auditory mode. The primary outcome was the HSM score at 24 months. The predictive meaning of general clinical data, tumor volume, number of active electrodes, duration of deafness, and early hearing data was examined. Results In 16 successful ABI activations the average score for MTPa was 89% (SD 13%), and for HSM it was 41% (SD 32%) at 24 months. There were 2 nonresponders, 1 after radiosurgery and the other in an anatomical variant. Direct facial nerve reconstruction during the same surgery was followed by successful nerve recovery in 2 patients, with a simultaneous very good HSM result. Patients' age, tumor extension, and tumor volume were not negative predictors. There was an inverse relationship between HSM scores and deafness duration; 50% or higher HSM scores were found only in patients with ipsilateral deafness duration up to 24 months. The higher the deafness sum of both sides, the less likely that any HSM score will be achieved (p = 0.034). In patients with total deafness duration of less than 240 months, higher numbers of active electrodes were significantly associated with better outcomes. The strongest cross-correlation was identified between early MTPa score at 3 months and 24-month HSM outcome. Conclusions This study documents that open-set speech recognition in pure auditory mode is feasible in patients with ABIs. Large tumor volumes do not prevent good outcome. Positive preconditions are short ipsilateral and short bilateral deafness periods and high number of auditory electrodes. Early ability in pure auditory word recognition tests indicates long-term capability of open speech perception.

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