US 8,506,628 B2Granted

Ossicular prosthesis having helical coil

AssigneeEnteroptyx

InventorEric M. Kraus

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Abstract

An ossicular prosthesis includes a proximal end provided with an open conically helical coil for engaging a first ossicular structure, and a distal bell head, piston, or shoe for engaging a second ossicular structure. A connecting element extends therebetween the two to hold the helical coil structure which engages the second ossicular engagement structure in a preferably fixed relationship. The helical coil defines a plurality of spaced apart adjacent windings, with open spaces between the windings. Each adjacent winding decreases in diameter from the proximal to distal end. The windings of the coil may be adjusted relative to each other in length or angle to fit the anatomy. In accord with a one method of use, the helical coil and optionally other portions of the prosthesis function as an armature or endoskeleton. A cement may be provided over the prosthesis to reconstruct the eroded or missing ossicles.

Claims17

Dependent claims

An ossicular prosthesis for implantation in a middle ear of a human for reconstruction of an ossicular chain, the middle ear including a tympanic membrane with tissue and the ossicular chain of the middle ear including a stapes, said prosthesis comprising:

a) an open-wound helical conical wire-form coil having a first end and a second end, said first end includes a first winding defining a first diameter and said second end includes a second winding defining a smaller second diameter, and at least two windings between said first and second windings, said coil continuous between said first and second windings, said first end of said coil capable of being positioned directly against the tissue;
b) an engagement structure including one of a bell head, a piston, and a shoe for engaging a portion of the stapes;
and
c) a connecting element coupling said second end of said coil to said engagement structure in a fixed orientation,
wherein said ossicular prosthesis is of a suitable size and material for implantation into the middle ear with said prosthesis extending from the tympanic membrane to the portion of the stapes to stably retain the prosthesis between the tympanic membrane and the portion of the stapes to at least partially reconstruct the ossicular chain.

2 more elements

a) an open-wound helical conical coil having a first end and a second end, said first end includes a first winding defining a first diameter and said second end includes a second winding defining a smaller second diameter, and at least two windings between said first and second windings, said coil continuous between said first and second windings, said first end of said coil capable of being positioned directly against the tissue;
b) an engagement structure including one of a bell head, a piston, and a shoe for engaging a portion of the stapes, said engagement structure having an axis;
and
c) a connecting element coupling said second end of said coil to said engagement structure in a fixed orientation,
a longitudinal axis extending between the center of the windings of said coil, said longitudinal axis of said coil is not parallel to said axis of said engagement structure,
wherein said coil is plastically deformable to adjust at least one of (i) a length of said wire-form coil along said longitudinal axis and (ii) a diameter of at least one winding, and
wherein said ossicular prosthesis is of a suitable size and material for implantation into the middle ear with said prosthesis extending from said tympanic membrane to the portion of the stapes to at least partially reconstruct the ossicular chain.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/295,725Filed 14 Nov 2011 · division
Priority: 6 Feb 2008
Published: US 2012/0123538 A117 May 2012
Granted: 13 Aug 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

A61F 2/18
Prostheses implantable into the body: internal ear or nose parts, e.g. ear-drums
A61F 2002/183
Internal ear or nose parts, e.g. ear-drums: ear parts
A61F
Filters implantable into blood vessels

Family

Application12/026,912Parent of this division · filed 6 Feb 2008
US 2012/0123538 A1Pre-grant publication · published 17 May 2012
US 8,057,542 B2Parent of this division
US 2009/0198334 A1Published application
US 8,506,628 B2This patent

From the US filing history. Foreign family members aren’t listed.