| The floating mass transducer on the round window versus attachment to an ossicular replacement prosthesis. | |
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MedLine Citation:
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PMID: 20930654 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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HYPOTHESIS: The Vibrant Soundbridge floating mass transducer (FMT) is part of a commercially available implantable hearing device in which the FMT can be placed in the round window (RW) niche or attached to a partial (V-PORP) or total ossicular replacement prosthesis (V-TORP) contacting the stapes head or footplate. The goal is to provide efficient transfer of sound vibration into the cochlea. The hypothesis is that the FMT location on the prosthesis is superior to the RW location. BACKGROUND: No direct comparisons of the 3 FMT sites have been performed using the same measurement location. METHODS: A new measurement method called the third window method was used in eleven fresh human temporal bones to compare the sites. A small hole was made into the scala tympani of the temporal bones preserving the endosteum. A reflective target was placed on the third window endosteum and displacement of the cochlear fluid was measured using a Polytec HLV-1000 laser Doppler vibrometer. The input to the FMT at all locations was a constant 316 millivolts (mV); the frequency range was 0.5 to 8.0 kHz. RESULTS: The V-PORP and V-TORP FMT locations both provided statistically significant better performance above 1.0 kHz than the RW site but not below that frequency. The V-PORP and V-TORP responses were similar at all test frequencies. CONCLUSION: In this temporal bone model, the FMT provided better higher frequency performance when attached to a PORP or TORP than in the RW niche. |
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Authors:
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Yoshitaka Shimizu; Sunil Puria; Richard L Goode |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology Volume: 32 ISSN: 1537-4505 ISO Abbreviation: Otol. Neurotol. Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2010-12-15 Completed Date: 2011-03-25 Revised Date: 2012-01-04 |
Medline Journal Info:
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Nlm Unique ID: 100961504 Medline TA: Otol Neurotol Country: United States |
Other Details:
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Languages: eng Pagination: 98-103 Citation Subset: IM |
Affiliation:
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Department of Veterans Affairs, Palo Alto Health Care System, Palo Alto, California, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Humans Ossicular Prosthesis* Prosthesis Implantation / methods Round Window, Ear / surgery* Temporal Bone / surgery* Transducers |
| Grant Support | |
ID/Acronym/Agency:
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DC05960/DC/NIDCD NIH HHS; R01 DC005960-01A2/DC/NIDCD NIH HHS; R01 DC005960-06/DC/NIDCD NIH HHS; R01 DC005960-07/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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