A New Floating Piezoelectric Microphone for Fully Implantable Cochlear Implants in Middle Ear
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Le résumé fourni par la source
OBJECTIVE: Our team designed a long-lasting, well-sealed microphone, which uses laser welding and vacuum packaging technology. This study examined the sensitivity and effectiveness of this new floating piezoelectric microphone (NFPM) designed for totally implantable cochlear implants (TICIs) in animal experiments and intraoperative testing. METHODS: Different NFPM frequency responses from 0.25 to 10 kHz at 90 dB SPL were analyzed using in vivo testing of cats and human patients. The NFPM was tested in different positions that were clamped to the ossicular chains or placed in the tympanic cavity of cats and human patients. Two volunteers' long incus foot and four cats' malleus neck of the ossicular chain were clamped with the NSFM. The output electrical signals from different locations were recorded, analyzed, and compared. The NFPM was removed after the test without causing any damage to the middle-ear structure of the cats. Intraoperative tests of the NFPM were performed during the cochlear implant surgery and the cochlear implant surgery was completed after all tests. RESULTS: Compared with the results in the tympanic cavity, the NFPM could detect the vibration from the ossicular chain more sensitively in cat experiments and intraoperative testing. We also found that the signal output level of the NFPM decreased as the acoustic stimulation strength decreased in the intraoperative testing. CONCLUSION: The NFPM is effective in the intraoperative testing, making it feasible as an implantable middle-ear microphone for TICIs. LEVEL OF EVIDENCE: 4 Laryngoscope, 134:937-944, 2024.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- A New Floating Piezoelectric Microphone for Fully Implantable Cochlear Implants in Middle Ear
- Date Crossref
- 08/07/2023
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Fudan University Department of Otology and Skull Base Surgery pays non établi dans la noticeUniversité ou école supérieure
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Shanghai Medical Information Center pays non établi dans la noticeInstitution
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Ministry of Health pays non établi dans la noticeOrganisme public
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The Affiliated Yongchuan Hospital of Chongqing Medical University pays non établi dans la noticeÉtablissement de santé
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Chongqing Medical University Department of Otorhinolaryngology pays non établi dans la noticeUniversité ou école supérieure
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Shanghai Auditory Medical Center Shanghai China pays non établi dans la noticeÉtablissement de santé
Department of Otology and Skull Base Surgery — Fudan University, Shanghai Medical Information Center et Ministry of Health, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.