CN210228402U

CN210228402U - Low-stress five-claw auditory ossicle prosthesis

Info

Publication number: CN210228402U
Application number: CN201920340316.3U
Authority: CN
Inventors: Jie Wang; 王杰; Takuji Koike; 小池卓二; Fei Zhao; 赵非; Yinan Hui; 惠一楠; Dewei Wang; 王德伟
Original assignee: Anhui Aofu Intelligent Minimally Invasive Medical Devices Co ltd
Current assignee: Anhui aofu intelligent minimally invasive medical instrument Group Co.,Ltd.
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2020-04-03
Anticipated expiration: 2029-03-18

Abstract

The utility model discloses a low-stress five-claw auditory ossicle prosthesis, which comprises a top disc, a connecting rod and a stirrup clip, wherein the top disc is provided with ribs, the bottom of the top disc is provided with a recessed cavity, so that the top disc is in a cover shape, and the periphery of the top disc forms an annular edge; the top disc is connected with the connecting rod through a ball joint; the stirrup clamp is of a five-claw structure; the structure of the top disc is changed, so that when the top disc is in contact with the tympanic membrane, the contact stress can be reduced, and the damage to the tympanic membrane caused by an acute angle generated when the top disc is obliquely placed can be avoided; the top disc is connected with the connecting rod through the ball-and-socket joint, so that the angle between the top disc and the connecting rod can be flexibly and conveniently adjusted, and the eardrum pressure buffer device is suitable for buffering the shear stress of the artificial auditory ossicle on the eardrum when the pressure of different middle ears changes; the stapes clamp is arranged into a five-claw specific thickness structure, so that the stapes clamp is suitable for tightness when being connected with the stapes, and the stapes can not be damaged due to over-tightness or fall off due to over-looseness.

Description

Low-stress five-claw auditory ossicle prosthesis

Technical Field

The utility model relates to the technical field of medical equipment, specifically a ossicle prosthesis is listened to five claws of low stress.

Background

The ossicles of the middle ear (consisting of three ossicles, called auditory ossicle chain, in sequence from the outside inwards: malleus, incus, stapes, the stapes consisting of the stapes arch and the stapes footplate, the latter being in contact with the perilymph fluid of the inner ear, the last structure of the middle ear that transmits vibrations to the inner ear) are often damaged by disease, trauma or congenital deformities. The incumbent is most often an injury to the incus. If the incus injury causes a discontinuity or fixation between the tympanic membrane and the stapes footplate, the vibrations transmitted from the tympanic membrane are not efficiently transmitted to the stapes bone, resulting in conductive hearing loss. When the damaged incus is replaced by the ossicular prosthesis, vibrations transmitted from the tympanic membrane will be transmitted by the ossicular prosthesis to the head of the stapes, thereby partially or fully compensating for the conductive hearing loss caused by the damage of the incus. In addition, the auditory ossicles in physiological states have the hammering block joint, the incudostapetum joint, the stapedial ring ligament, the soft link between the tympanic membrane and the malleus, and the ligaments of the malleus and the incus, so that the tympanic auditory ossicle chain system can buffer the middle ear cavity pressure changes. Such an ossicular prosthesis replacing the incus is also referred to as a partially artificial ossicle or a partially ossicular prosthesis.

Currently, a part of auditory ossicle prosthesis is generally composed of a top disc, a connecting rod and a clamp, so as to replace an incus. When the existing ossicular prosthesis is used, the top disc is in contact with the tympanic membrane at the contact part of the ossicular prosthesis, and the tympanic membrane is damaged and perforated even the implant is removed due to overlarge tangential stress and normal stress on the tympanic membrane caused by the pressure change of the middle ear cavity; the top disc is fixed with the connecting rod, and the normal stress and the shear stress of the tympanic membrane at the contact part of the tympanic membrane and the artificial ossicle can not be obviously increased due to the hard connection mode which can not buffer the pressure change of the middle ear cavity; in addition, the stapes clamp is typically four, seven or eight-pronged, and there are problems with over-loosening or over-tightening of the stapes head.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a low-stress five-claw auditory ossicle prosthesis which can reduce the stress between the auditory ossicle prosthesis and the tympanic membrane, relieve the damage to the tympanic membrane, and is easy to adapt to the change of the tympanic membrane position through the self-adaptive adjustment of the angle between the top disc and the connecting rod when the middle ear pressure changes, thereby buffering the pressure change of the middle ear; the blade thickness of the clamp is adjusted to realize fixation to the stapes head, but ischemia, decalcification and necrosis caused by excessive pressure on the stapes are avoided; in addition, the utility model is convenient to be connected with the stapes bone and has proper tightness.

The utility model provides a technical scheme that its technical problem adopted is:

a low-stress five-claw auditory ossicle prosthesis comprises a top disc, a connecting rod and a stirrup clip, wherein the top disc is provided with ribs, the bottom of the top disc is provided with a recessed cavity, so that the top disc is in a cover shape, and the periphery of the top disc forms an annular edge; the top disc is connected with the connecting rod through a ball joint; the stapes clip is a five-claw structure.

Furthermore, the ribs of the top plate are S-shaped.

Furthermore, a buffer spring is arranged in the ball-and-socket joint.

Further, the top disc is circular or oval.

Further, the ball-and-socket joint is located at the center or eccentric position of the top plate.

The utility model has the advantages that:

the structure of the top disc is changed, so that when the top disc is in contact with the tympanic membrane, the contact stress can be reduced, and the damage to the tympanic membrane caused by an acute angle generated when the tympanic membrane and the top disc are relatively inclined is avoided, even perforation of the tympanic membrane or removal of an implant is avoided;

secondly, the ribs on the top disc are arranged in an S shape, so that the visual field during operation can be enlarged, blind areas can be reduced, and the quality of the auditory ossicle prosthesis can be reduced;

thirdly, the top disc is connected with the connecting rod through the ball-and-socket joint, the angle between the top disc and the connecting rod can be adjusted in a self-adaptive manner, and the device is suitable for the change of the relative position between the eardrum and the top disc caused by the change of the middle ear pressure in different degrees;

a buffer spring is arranged in the ball-and-socket joint, so that the air pressure change of a part of middle ears can be buffered, the pressure of the top disc on the eardrum is reduced, the damage of the top disc on the eardrum is further reduced, and the falling rate of the implant is reduced;

and fifthly, the stapes clamp is arranged into a five-claw structure, so that the stapes clamp is proper in tightness when being connected with the stapes, and the stapes cannot be damaged due to over-tightness or fall off due to over-looseness.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a bottom perspective view of the present invention;

fig. 3 is a side view of the present invention.

Detailed Description

Referring to fig. 1 to 3, the present invention provides a low stress five-claw auditory ossicle prosthesis, which comprises a top plate 1, a connecting rod 2 and a stapes clip 3; the top plate 1 is provided with ribs 4, and the ribs 4 are S-shaped; the bottom of the top disc 1 is provided with a recessed cavity 5, so that the top disc is in a cover shape, and an annular edge 6 is formed at the periphery of the top disc; the top disc 1 is connected with the connecting rod 2 through a ball-and-socket joint 7, and preferably, a buffer spring 8 is arranged in the ball-and-socket joint 7; the stapes clip 3 is a five-claw structure, the five claws are two claws at the back, one claw at the front and one claw at two sides, the two claws at the back enable the stapes clip to be matched with the stapes tendon at the back of the stapes head; the two bilateral claws are slightly inclined inwards and are easy to be embedded into the space between the stapes arches below the stapes head; the front claw prevents the artificial auditory ossicle and the stapes head from sliding backwards, and plays a role in fixing the position of the artificial auditory ossicle; in addition, the design facilitates removal for repositioning during use without damaging the stapes and the stapes annulus ligament by adjusting the elasticity of each jaw structure; the top plate 1 is circular or oval; the ball joint 7 is located in the center of the top plate 1, and may be located in an eccentric position.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the invention is not limited to the embodiments described herein, but is capable of other embodiments according to the invention, and may be used in various other applications, including, but not limited to, industrial. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. A low-stress five-claw auditory ossicle prosthesis comprises a top disc, a connecting rod and a stirrup clip, wherein the top disc is provided with a rib, and the low-stress five-claw auditory ossicle prosthesis is characterized in that the bottom of the top disc is provided with an inwards recessed cavity, so that the top disc is in a cover shape, and the periphery of the top disc forms an annular edge; the top disc is connected with the connecting rod through a ball joint; the stapes clip is a five-claw structure.

2. A low stress five-pronged auditory ossicle prosthesis according to claim 1 wherein the top disc ribs are S-shaped.

3. A low stress five-jaw auditory ossicle prosthesis according to claim 1 or 2 wherein a buffer spring is provided in the ball and socket joint.

4. A low stress five-jaw auditory ossicle prosthesis according to claim 3 wherein the top disc is circular or oval in shape.

5. A low stress five-jaw auditory ossicle prosthesis according to claim 4 wherein the ball and socket joint is located in the center or off center of the top disc.