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Ossicular replacement prosthesis

A prosthesis, fluid technology, applied in the direction of prosthesis, medical science, ear implants, etc., can solve the problem of inability to realize such a device, and achieve the effect of high stiffness

Active Publication Date: 2010-03-24
MED EL ELEKTROMEDIZINISCHE GERAETE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They concluded that a combined spring and damper element was the best option for this application, although they acknowledged that such a device is currently not achievable

Method used

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Examples

Experimental program
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Embodiment Construction

[0050] In the following Figure 2 to Figure 11 In the description of , preferred embodiments of the ORP are described, designated by the general designations 10, 100, 200, 300, 400, 500, 600 and 700, respectively.

[0051] The first preferred embodiment of the present invention is figure 2 As shown in , in the figure, ORP 10 includes a container 12 having a single bore 14 in which a piston 22 is slidably mounted. A flexible cover 26 is secured to the container 12 and to the free end 24 of the piston 22 to enclose a chamber 28 filled with a fluid 30 (preferably a non-Newtonian expanding fluid). The piston 22 defines an annular gap 32 between the piston 22 and the bore 14 such that a fluid 30 can flow between the bore 14 and the chamber 28 through the gap 32 . Accordingly, the resistance of fluid 30 as it passes through annular gap 32 will affect the variation in the effective stiffness of ORP 10 in response to the type of load applied to ORP 10 . It should be noted that thi...

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PUM

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Abstract

The invention provides an ossicular replacement prosthesis (ORP) for coupling a first point to a second point in the middle ear of a patient, to replace all or part of the ossicular chain. The ORP comprises a coupling having a variable configuration for accounting for pressure differentials, said coupling comprising a fluid filled chamber (28, 14) having two relatively moveable portions (12, 22) for varying the configuration of the coupling. The coupling comprises unsealed means constituting leak means and flowpath means for permitting displacement of the fluid (30). The relative movement of the relatively moveable portions is controlled by the movement of the fluid in said chamber. The chamber is configured to restrict the movement of the fluid such that relative movement of the moveableportions is permitted in response to quasi-static changes in pressure, and is substantially prevented in response to vibrational changes corresponding to sound frequencies.

Description

technical field [0001] The present invention relates to an ossicle replacement prosthesis, in particular (but not excluding other possibilities), it relates to an ossicle replacement prosthesis comprising a Newtonian or non-Newtonian fluid system. Background technique [0002] An ossicular replacement prosthesis (ORP) is a construct used to replace part or all of one or more of the three bones of the ossicular chain of the human middle ear. A schematic representation of the ossicular chain is in figure 1 shown in . The ossicular chain, generally indicated by reference numeral 1, comprises three connected bones (called ossicles) extending through the middle ear from the eardrum (eardrum) 3 to the oval window (not shown). The bones include the malleus 5, which includes the important parts known as the neck or handle (more strictly, the shank) 7, and the head 9; the incus 11, which includes the main body, and the stapes 15. Part 13. These bones are also colloquially known a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/18
CPCA61F2002/183A61F2/18
Inventor 埃里克·威廉·艾贝尔弗兰克·亚伯拉罕
Owner MED EL ELEKTROMEDIZINISCHE GERAETE GMBH
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