Optimization of kinetic energy harvesters design for fully implantable Cochlear Implants

Sudano, Angelo; Accoto, Dino; Francomano, M. T.; Salvinelli, Fabrizio; Guglielmelli, Eugenio

doi:10.1109/iembs.2011.6091892

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…However, due to the excellent functional results of cochlear implantation in most patients [1] , there is recently also a growing focus on patient comfort issues; e.g., current developments in cochlear implantation are the establishment of minimally invasive techniques not even needing mastoidectomy or posterior tympanotomy [9][10][11][12][13] , the development of fully implantable devices [14] , and the use of absorbable skin sutures [15] for maximising patient comfort and benefit.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Skin Scars Following Cochlear Implant Surgery

Bräun¹,

Langhagen²,

Berghaus³

et al. 2014

Int Adv Otol

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OBJECTIVE:The understanding of speech is the most important outcome parameter after cochlear implantation. However, due to the excellent functional results of cochlear implantation in most patients, there is recently also a growing focus on patient comfort issues, e.g., aesthetic results. MATERIALS and METHODS:This study evaluated 34 skin scars after cochlear implant surgery in adults using the Stony Brook Scar Evaluation Scale, a well-validated instrument with a high interrater reliability and construct validity for evaluating the aesthetic outcome of skin scars. RESULTS:The mean follow-up time was 62 months. Using a retroauricular incision, the scars had an excellent to good aesthetic appearance in 85% of the cases. Revision surgery was the main factor for aesthetically unsatisfactory scars. CONCLUSION:The aesthetic outcome of skin scars after cochlear implant surgery is excellent or good for the majority of the patients. The most important risk factor for an unsatisfactory aesthetic outcome is revision surgery, an issue that should be communicated in preoperative counselling.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Skin Scars Following Cochlear Implant Surgery

Bräun¹,

Langhagen²,

Berghaus³

et al. 2014

Int Adv Otol

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“…With these drawbacks in mind, several groups have focused on designing and building a fully implantable cochlear implant (9, 23, 24). Before this can be achieved, there are technical hurdles that must be overcome, including power constraints, miniaturization of the speech processor, reliable connectors, and finally an implantable microphone.…”

Section: Introductionmentioning

confidence: 99%

An Intracochlear Pressure Sensor as a Microphone for a Fully Implantable Cochlear Implant

Creighton¹,

Guan

Park

et al. 2016

Otology &Amp; Neurotology

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Goal To validate an intracochlear piezoelectric sensor for its ability to detect intracochlear pressure and function as a microphone for a fully implantable cochlear implant. Methods A PVDF piezoelectric pressure sensor was inserted into a human fresh cadaveric round window at varying depths. An external sound pressure stimulus was applied to the external auditory canal (EAC). EAC pressure, stapes velocity, and piezoelectric sensor voltage output were recorded. Results The PVDF sensor was able to detect the intracochlear sound pressure response to an acoustic input to the EAC. The frequency response of the pressure measured with the intracochlear sensor was similar to that of the pressure at the EAC, with the expected phase delay of the middle ear transmission. The magnitude of the response increased and smoothened with respect to frequency as the sensor was inserted more deeply into the scala tympani. Artifact measurements, made with the sensor in air near the round window, showed flat frequency response in both magnitude and phase, which were distinct from those measured when the sensor was inserted in the round window. Conclusion This study describes a novel method of measuring intracochlear pressure for an otologic microphone composed of a piezoelectric polymer, and demonstrates feasibility. Our next goal is to improve device sensitivity and bandwidth. Our long-term objective is to imbed the piezoelectric sensor within a conventional cochlear implant electrode, to enable a device to both measure intracochlear sound pressure and deliver electrical stimulus to the cochlea, for a fully implantable cochlear implant.

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Energy Harvesting Research: The Road from Single Source to Multisource

2018

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Energy harvesting technology may be considered an ultimate solution to replace batteries and provide a long-term power supply for wireless sensor networks. Looking back into its research history, individual energy harvesters for the conversion of single energy sources into electricity are developed first, followed by hybrid counterparts designed for use with multiple energy sources. Very recently, the concept of a truly multisource energy harvester built from only a single piece of material as the energy conversion component is proposed. This review, from the aspect of materials and device configurations, explains in detail a wide scope to give an overview of energy harvesting research. It covers single-source devices including solar, thermal, kinetic and other types of energy harvesters, hybrid energy harvesting configurations for both single and multiple energy sources and single material, and multisource energy harvesters. It also includes the energy conversion principles of photovoltaic, electromagnetic, piezoelectric, triboelectric, electrostatic, electrostrictive, thermoelectric, pyroelectric, magnetostrictive, and dielectric devices. This is one of the most comprehensive reviews conducted to date, focusing on the entire energy harvesting research scene and providing a guide to seeking deeper and more specific research references and resources from every corner of the scientific community.

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Optimization of kinetic energy harvesters design for fully implantable Cochlear Implants

Cited by 4 publications

References 13 publications

Evaluation of Skin Scars Following Cochlear Implant Surgery

Evaluation of Skin Scars Following Cochlear Implant Surgery

An Intracochlear Pressure Sensor as a Microphone for a Fully Implantable Cochlear Implant

Energy Harvesting Research: The Road from Single Source to Multisource

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