Affiliation:
1. Department of Otology and Skull Base Surgery, Eye Ear Nose & Throat Hospital Fudan University Shanghai China
2. Shanghai Auditory Medical Center Shanghai China
3. NHC Key Laboratory of Hearing Medicine (Fudan University) Shanghai China
4. Department of Otorhinolaryngology The First Affiliated Hospital of Chongqing Medical University Chongqing China
Abstract
ObjectiveOur 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.MethodsDifferent 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.ResultsCompared 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.ConclusionThe NFPM is effective in the intraoperative testing, making it feasible as an implantable middle‐ear microphone for TICIs.Level of Evidence4 Laryngoscope, 134:937–944, 2024
Funder
National Natural Science Foundation of China
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献