Middle-ear implant

Details Middle-ear implant Middle-ear implant

A - Human Necessities

61

F

A61F 2/18 (2006.01) A61F 11/00 (2006.01)

Patent

CA 2378361

This invention relates to surgical methods and prosthetic devices for ameliorating hearing loss in patients having ailments of the middle ear. The implant of the invention includes a gas-filled balloon (26) having a pliant membrane (26a) of biocompatible material. The balloon (26) is made such that the acoustic impedance presented by the balloon (26) to the eardrum is low enough to permit the eardrum to vibrate freely in response to sound waves. Because the balloon membrane (26a) is substantially impermeable to gases and water, the implant can function effectively within the middle-ear chamber for an extended period.

Cette invention concerne des techniques chirurgicales et des dispositifs prosthétiques destinés à améliorer l'ouïe chez des patients atteints de troubles de l'oreille moyenne. L'implant selon l'invention comporte un ballonnet (26) rempli de gaz qui est muni d'une membrane (26a) pliable réalisée dans un matériau biocompatible. Le ballonnet (26) est ainsi conçu que l'impédance acoustique qu'il présente pour la membrane du tympan est suffisamment faible pour que ladite membrane puisse vibrer librement en réponse aux ondes sonores. Comme la membrane (26a) du ballonnet est essentiellement imperméable aux gaz et à l'eau, l'implant peut fonctionner correctement dans la chambre de l'oreille moyenne pendant une période prolongée.

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