Easily-installed ossicle prosthesis capable of accurately adjusting length

Abstract

The utility model discloses an auditory ossicle prosthesis capable of accurately adjusting length and convenient to install, which is used for replacing or bridging at least one link of a human auditory ossicle chain. Comprising a first fixing element mechanically connected with a periosteum or a link of an auditory ossicle chain and a second fixing element mechanically connected with another link or part of the link of the auditory ossicle chain or directly connected with an inner ear; the first fixing element is connected with an external threaded rod, the second fixing element is connected with an internal threaded sleeve, the external threaded rod is in threaded connection with an internal threaded hole of the internal threaded sleeve, and the external threaded rod is in threaded connection with a locking nut used for locking and fixing the external threaded rod and the internal threaded sleeve. According to the auditory ossicle prosthesis, the length of the auditory ossicle prosthesis can be accurately adjusted through the threaded fit of the external threaded rod and the internal threaded sleeve; after adjustment is completed, locking and fixing can be conducted through a locking nut, so that the overall rigidity of the auditory ossicle prosthesis is guaranteed; and the sound conduction effect is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an ossicle prosthesis that can be accurately adjusted in length and is easy to install. Background Technology

[0002] In ossicular chain reconstruction surgery, ossicular implants serve as a reliable artificial substitute to replace ossicular structures damaged by disease. This allows for the repair of the mechanical conduction mechanism between the periosteum and the stapes footplate, thereby restoring or improving the function of the middle ear's sound transmission system.

[0003] Existing ossicular prostheses achieve adjustable length through various structures in the central rod section; for example, they utilize clasp connections (such as in existing patent CN116035764A), spring-like connections (such as in existing patent CN116196141A), and structures employing the plastic deformation of materials (such as in existing patents CN101889909B and CN213250050U). These ossicular prostheses share a common problem: insufficient rigidity, resulting in poor sound transmission; and the length cannot be accurately controlled.

[0004] There is also a type of detachable ossicle prosthesis currently on the market, such as... Figure 1 As shown, it includes: an implant stem 1 and an implant foot 2. The implant stem 1 can be broken at the incision 3 to achieve overall length adjustment. The detachable ossicle prosthesis can only be shortened to a fixed length each time, such as 0.5 mm (single segment length) or an integer multiple thereof. The length can only be adjusted in a fixed unit, and the rigidity at the incision is still relatively weak, affecting sound conduction. In addition, it needs to be removed for adjustment before being reinstalled.

[0005] Furthermore, the applicant of this utility model previously filed a patent application (application number 202323073940.7) for an ossicular prosthesis, which adjusts the length by inserting a first and second rod portion. After adjusting to a preset length, the first and second rod portions are pinched and fixed together using forceps or the like. This ossicular prosthesis cannot achieve accurate length adjustment during surgery. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides an ossicle prosthesis that can be accurately adjusted in length and is easy to install.

[0007] This utility model discloses an ossicular prosthesis that can be accurately adjusted in length and is easy to install, which replaces or bridges at least one link of the human ossicular chain, including: a first fixation element mechanically connected to the periosteum or a link of the ossicular chain, and a second fixation element mechanically connected to another link or part of the ossicular chain or directly to the inner ear.

[0008] The first fixing element is connected with an outer threaded rod, the second fixing element is connected with an inner threaded sleeve, the outer threaded rod is screwed in the inner threaded hole of the inner threaded sleeve, and a locking nut is screwed on the outer threaded rod to lock and fix the outer threaded rod and the inner threaded sleeve; length adjustment of the ossicular prosthesis is realized based on the screwing length of the outer threaded rod in the inner threaded sleeve.

[0009] As a further improvement of the utility model, the outer threaded rod is coaxially arranged with the first fixing element and is an integral structure, the inner threaded sleeve is coaxially arranged with the second fixing element and is an integral structure, and the outer threaded rod is coaxially arranged with the inner threaded sleeve.

[0010] As a further improvement of the utility model, the first fixing element is a top plate, and the second fixing element is a claw; or, the first fixing element is a claw, and the second fixing element is a top plate.

[0011] As a further improvement of the utility model, the first fixing element is a top plate, a plurality of through holes are arranged around a center ring on the top plate, a plurality of circular grooves are uniformly distributed on the outer circumferential surface of the top plate, and a doctor can top the circular grooves with a thimble or other tools during the operation process to facilitate rotation of the top plate; the claw is composed of a plurality of clamping legs, and the end faces of all the clamping legs are in the same plane.

[0012] As a further improvement of the utility model, a top groove is arranged on each side surface of the locking nut, and a doctor can top the top groove with a thimble or other tools during the operation process to facilitate rotation of the locking nut.

[0013] As a further improvement of the utility model, the first fixing element, the second fixing element, the outer threaded rod and the inner threaded sleeve are titanium pieces.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model can realize accurate adjustment of the length of the ossicular prosthesis through the threaded cooperation of the outer threaded rod and the inner threaded sleeve, can lock and fix the ossicular prosthesis through the locking nut after the adjustment is completed, can ensure the rigidity of the whole ossicular prosthesis, and can enhance the conduction effect of sound.

[0016] The utility model sets the circular grooves on the outer circumferential surface of the top plate and sets the top groove on the locking nut, so that the doctor can top the circular grooves of the first fixing element or the top groove of the locking nut with a thimble or other tools during the operation process, can realize real-time adjustment and locking of the length of the ossicle, and is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Structure diagram of existing cut-off ossicular prosthesis;

[0018] Figure 2 The utility model discloses a ossicular prosthesis which can be accurately adjusted in length and is convenient to install;

[0019] Figure 3 The utility model discloses Figure 2 Front view;

[0020] Figure 4 The utility model discloses Figure 3 A-A section view of

[0021] Figure 5 The utility model discloses Figure 2 Top view of

[0022] Figure 6 The utility model discloses Figure 5 B-B section view of

[0023] Symbol explanation:

[0024] 1, implant handle; 2, implant foot; 3, cutout.

[0025] 10, first fixing element; 11, through hole; 12, circular groove; 20, second fixing element; 21, clamping foot; 30, external thread rod; 40, internal thread sleeve; 41, internal thread hole; 50, locking nut; 51, top groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0027] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings:

[0030] like Figures 2 to 6 As shown, this utility model provides an ossicular prosthesis with accurate length adjustment and convenient installation, which replaces or bridges at least one link of the human ossicular chain, including: a first fixing element 10 mechanically connected to the periosteum or a link of the ossicular chain, and a second fixing element 20 mechanically connected to another link or part of the ossicular chain or directly to the inner ear; wherein, the first fixing element 10 is connected to an external threaded rod 30, and the second fixing element 20 is connected to an internal threaded sleeve 40, the external threaded rod 30 is screwed into the internal threaded hole 41 of the internal threaded sleeve 40, and a locking nut 50 is screwed onto the external threaded rod 30 for locking and fixing the external threaded rod 30 and the internal threaded sleeve 40; the length adjustment of the ossicular prosthesis, that is, the length between the first fixing element 10 and the second fixing element 20, is realized based on the screwing length of the external threaded rod 30 into the internal threaded sleeve 40.

[0031] Specifically:

[0032] The external threaded rod 30 of this utility model is coaxially arranged with the first fixing element 10 and is an integral structure; the internal threaded sleeve 40 is coaxially arranged with the second fixing element 20 and is an integral structure; the external threaded rod 30 and the internal threaded sleeve 40 are coaxially arranged, as shown below. Figure 2 As shown. In this invention, the first fixing element 10 is a top plate, and the second fixing element 20 is a claw; or, the first fixing element 10 is a claw, and the second fixing element 20 is a top plate; preferably... Figure 2The first fixing element 10 is a top plate, and a plurality of through holes 11 are arranged around the center ring on the first fixing element 10; the second fixing element 20 is a claw, and the claw is composed of a plurality of clamping legs 21, and the end faces of all the clamping legs 21 are in the same plane. In use, the first fixing element 10 can be connected to the malleus, and the second fixing element 20 can be connected to the stapes; based on this, the auditory ossicular chain is perfected. Due to the above structure of the claw, the claw has both a planar structure and a claw structure, so that the claw is convenient to use in different operations (stapes non-retention or stapes partial retention); for example, when the stapes is not retained, the planar surfaces of the four clamping legs of the claw can be abutted and fixed on the stapes bottom plate; when the stapes is retained or partially retained, the four clamping legs of the claw can be gripped on the stapes.

[0033] The first fixing element 10 of the utility model is uniformly distributed with a plurality of circular grooves 12 on the outer circumferential surface, such as Figure 2 The above circular groove design has the advantages that: in the operation process, the doctor abuts the top pin or other tools in the circular groove 12 to facilitate the rotation of the first fixing element 10, and then the length of the auditory ossicular prosthesis is adjusted. The utility model can be provided with a top groove 51 on each side surface of the locking nut 50, and the above top groove design has the advantages that: in the operation process, the doctor abuts the top pin or other tools in the top groove 51 to facilitate the rotation of the locking nut 50, and then the locking and fixing of the external thread rod 30 and the internal thread sleeve 40 are realized. It should be noted that: the circular groove 12 and the top groove 51 can also be selected to be omitted, and the doctor can also realize the corresponding rotation operation by abutting the top pin or other tools on the first fixing element 10 and the locking nut 50, but the use effect is relatively poor.

[0034] The first fixing element 10, the second fixing element 20, the external thread rod 30 and the internal thread sleeve 40 of the utility model are preferably pure titanium pieces.

[0035] The use method of the utility model is:

[0036] Coarse adjustment: the doctor takes out the auditory ossicular prosthesis from the sterile bag, the external thread rod 30 is screwed into the internal thread sleeve 40, and the length of the auditory ossicular prosthesis is coarsely adjusted to the required length by adjusting the screwed-in length of the external thread rod 30; at this time, the locking nut 50 can be locked or not locked;

[0037] Placement: the first fixing element 10 of the auditory ossicular prosthesis after coarse adjustment is placed at the malleus position, and the second fixing element 20 is placed at the stapes position;

[0038] Fine adjustment: the doctor puts the first fixed element 10 in the circular groove 12 by the thimble or other tools, rotates the first fixed element 10, and then accurately adjusts the length of the ossicular prosthesis to the required length; then, the doctor puts the thimble or other tools in the top groove 51 to rotate the locking nut 50, locks the outer threaded rod 30 and the inner threaded sleeve 40, and completes the operation.

[0039] The utility model has the advantages that:

[0040] The utility model discloses the thread cooperation of outer threaded rod and inner threaded sleeve can realize the accurate adjustment of the length of ossicular prosthesis, and after the adjustment is completed, can lock and fix through the locking nut to guarantee the rigidity of the ossicular prosthesis whole, and the conduction effect of sound is enhanced.

[0041] The utility model discloses the circular groove is established on the outer periphery of the top plate, and the top groove is set up on the locking nut, and in the operation process, the ossicular prosthesis does not need to be taken out, and the doctor can put the thimble or other tools in the circular groove of the first fixed element or the top groove of the locking nut to carry out the real-time adjustment and locking of the length of the ossicle, and the operation is convenient.

[0042] The above is only the preferred embodiment of the utility model and is not used for limiting the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An ossicular prosthesis which is easily length-adjustable and easy to install, which replaces or bridges at least one link of the human ossicular chain, characterized in that, The application relates to a length-adjustable ossicular prosthesis. The first fixing element is mechanically connected with the periosteum or a link of the ossicular chain, and the second fixing element is mechanically connected with another link or part of a link of the ossicular chain or directly with the inner ear. An externally-threaded rod is connected with the first fixing element, an internally-threaded sleeve is connected with the second fixing element, the externally-threaded rod is screwed in the internally-threaded hole of the internally-threaded sleeve, a locking nut is screwed on the externally-threaded rod to lock and fix the externally-threaded rod and the internally-threaded sleeve; and the length of the ossicular prosthesis is adjusted based on the screwing length of the externally-threaded rod in the internally-threaded sleeve.

2. The ossicle prosthesis of claim 1, wherein The externally-threaded rod is coaxially arranged with the first fixing element and is an integral structure, the internally-threaded sleeve is coaxially arranged with the second fixing element and is an integral structure, and the externally-threaded rod is coaxially arranged with the internally-threaded sleeve.

3. The ossicle prosthesis of claim 1, wherein The first fixing element is a top plate, and the second fixing element is a claw; or the first fixing element is a claw, and the second fixing element is a top plate.

4. The ossicle prosthesis of claim 3, wherein The first fixing element is a top plate, a plurality of through holes are arranged around a central ring on the top plate, and a plurality of circular grooves are uniformly distributed on the outer circumferential surface of the top plate; the claw is composed of a plurality of clamping legs, and the end faces of all the clamping legs are in the same plane.

5. The ossicle prosthesis of claim 1, wherein Each side surface of the locking nut is provided with a top groove.

6. The ossicle prosthesis of claim 1, wherein The first fixing element, the second fixing element, the externally-threaded rod and the internally-threaded sleeve are titanium pieces.

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