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Ossicular prosthesis adjusting device

a technology of adjusting device and ossicular prosthesis, which is applied in the field of adjusting device for adjustable length ossicular prosthesis, can solve the problems of unfavorable treatment of ossicular prosthesis, and difficulty in manipulating micro-sized implants with hands or specialty instruments

Active Publication Date: 2009-07-14
CLARITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this damage results in a discontinuity of bone between the tympanic membrane and the oval window, no sound conducts and hearing loss results.
This type of procedure creates two problems.
It is extremely difficult to manipulate these micro-sized implants with the hands or specialty instruments.
The second problem is unwanted handling of a sterile implant.
Because the surgeon has to adjust the length of the implant using his fingers or an instrument, contamination issues increase.
There is also the possibility that the prosthesis could be bent or deformed during handling.

Method used

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Examples

Experimental program
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Embodiment Construction

[0028]Referring to FIGS. 1 and 2, an ossicular prosthesis delivery system 10 comprises an ossicular prosthesis 12 and an adjusting device 14. The adjusting device 14 comprises a main body 16, a plunger 18 and a protective shield 20.

[0029]Referring to FIGS. 3, 3A, 3B and 3C, the main body 16 is of elongate one piece plastic construction including an outer wall 22 between a first end wall 24 and a second end wall 26. The outer wall 16 is cylindrical at an operating portion 28 adjacent the first end wall 24 and semi-cylindrical cylindrical at an adjusting portion 30 proximate the second end wall 26. The operating portion 28 includes a cylindrical through bore 32. The adjusting portion 30 includes a semi-cylindrical upwardly opening channel 34 coaxial with the through bore 32. The second end wall 26 forms a shoulder 36 at the juncture with the channel 34. A semi-circular notch 38 in the second end wall 26 is coaxial with the channel 34. An upwardly opening cavity 40 is provided in the s...

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Abstract

An ossicular prosthesis delivery system having an ossicular prosthesis including an enlarged head and a shaft axially, moveably mounted to the head to adjust shaft length. An elongate main body having an operating portion, including a cylindrical through bore, connected to an adjusting portion, including a generally semi-cylindrical upwardly opening channel coaxial with the bore. An end wall at a distal end of the adjusting portion includes a through passage coaxial with the channel and an upwardly opening cavity. An elongate cylindrical plunger has a claw at one end. The plunger is received in the bore with the claw in the channel and an opposite end extending outwardly of the operating portion. The ossicular prosthesis' shaft is positioned in the channel with the head received in the cavity and the plunger is rotatable in the bore to capture the shaft and is reciprocally moveable in the bore to adjust shaft length of the ossicular prosthesis.

Description

FIELD OF THE INVENTION[0001]This invention relates to ossicular prosthesis used for replacement and reconstruction and, more particularly to an adjusting device for an adjustable length ossicular prosthesis.BACKGROUND OF THE INVENTION[0002]Due to disease, trauma, or congenital malformation, the ossicles of the middle ear are sometimes damaged. If this damage results in a discontinuity of bone between the tympanic membrane and the oval window, no sound conducts and hearing loss results. Some or all of these ossicles can be replaced with a small prosthesis.[0003]The use of middle ear prosthesis for reconstructing the ossicular chain has gone through a myriad of changes over the years. Since each ear has different anatomical dimensions, the length of middle ear prosthesis varies, from 2 mm to 8 mm, on average, with each patient. The most recent trend in otology is the use of titanium prostheses. These are commonly offered as a fixed length prosthesis or an adjustable type prosthesis. T...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A61F2/18A61F11/00
CPCA61F2/18A61F2002/183A61F2250/0007
Inventor WHITE, MICHAEL D.PRESCOTT, ANTHONY D.REITAN, HARLAN J.
Owner CLARITY
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