CN113367841B

CN113367841B - Auditory ossicle prosthesis based on titanium periosteum

Info

Publication number: CN113367841B
Application number: CN202110786757.8A
Authority: CN
Inventors: 李晓雨; 吴芳; 刘阳; 蒯颢
Original assignee: 6th Medical Center of PLA General Hospital
Current assignee: 6th Medical Center of PLA General Hospital
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-08-16
Anticipated expiration: 2041-07-12
Also published as: CN113367841A

Abstract

The invention discloses an auditory ossicle prosthesis, which comprises a middle rod, wherein two ends of the middle rod are respectively provided with a supporting plate and a connector, the supporting plate is used for connecting a tympanic membrane, the connector is used for connecting a stapes, the supporting plate and the connector are integrally formed with the middle rod, and an included angle between the middle rod and a plane where the supporting plate is located is less than ninety degrees; the supporting plate is formed into an oval shape corresponding to the shape of the tympanic membrane, and the connecting point of the supporting plate and the middle rod is not overlapped with the circle center of the supporting plate; the intermediate lever is an elastic rod-shaped member capable of stretching. All the structures of the invention are integrally formed, the vibration effect of the tympanic membrane is good, and the postoperative recovery effect of the patient is ensured.

Description

Auditory ossicle prosthesis based on titanium periosteum

Technical Field

The invention relates to the technical field of medical auxiliary instruments, in particular to an auditory ossicle prosthesis based on a titanium periosteum.

Background

The ossicle (ossicle) is the smallest bone in the human body, also called ossicle, and the left and right ears are composed of three ossicles, anvil and stapes, most of which are located in the upper tympanic cavity and connected by ligaments and joints to form the ossicular chain. The malleus handle is arranged on the inner side surface of the tympanic membrane and is positioned between the mucosa layer and the fiber layer. The stapes footplate is the annulus ligament which is connected to the oval window, and the incus is between the hammer and the stapes. Auditory ossicle prostheses are generally surgically implanted to replace the function of the ossicles due to disease or congenital causes.

Chinese patent CN109730809A discloses a low-stress rotatable ossicle prosthesis, which can flexibly and conveniently adjust the angle between the top disc and the connecting rod, so that the top disc can reduce the contact stress when contacting with the tympanic membrane, and avoid the damage to the tympanic membrane caused by the acute angle generated when the top disc is placed obliquely. However, because the top plate and the connecting rod of the ossicular prosthesis with the structure are connected through the ball-and-socket joint, the vibration of the tympanic membrane can be influenced when being transmitted to the vestibule through the ball-and-socket joint, and the postoperative hearing recovery effect of a patient is further influenced.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides an auditory ossicle prosthesis based on a titanium periosteum, which has the following specific scheme:

an auditory ossicle prosthesis based on a titanium periosteum comprises a middle rod, wherein two ends of the middle rod are respectively provided with a supporting plate and a connector, the supporting plate is used for connecting a tympanic membrane, the connector is used for connecting a stapes, the supporting plate and the connector are integrally formed with the middle rod, and an included angle between the middle rod and a plane where the supporting plate is located is smaller than ninety degrees; the supporting plate is formed into an oval shape corresponding to the shape of the tympanic membrane, and the connecting point of the supporting plate and the middle rod is not overlapped with the circle center of the supporting plate; the intermediate lever is an elastic rod-shaped member capable of stretching.

Furthermore, the included angle between the middle rod and the plane where the supporting plate is located is eighty degrees to eighty-five degrees.

Further, the working surface of the supporting plate is concave towards the direction of the middle rod to form a funnel-shaped structure.

Furthermore, the working surface of the supporting plate is composed of a plurality of mutually staggered reinforcing ribs.

Furthermore, the body structure of the middle rod is a first compression spring, the inner diameter of the first compression spring gradually increases from one end close to the supporting plate to one end far away from the supporting plate, and the tail end of the first compression spring far away from the supporting plate forms the connecting head.

Further, the inner diameter of the first compression spring distal to the blade end is greater than the width of the stapes arch.

Furthermore, a second compression spring is fixedly connected in the first compression spring, and the tail end of the second compression spring, which is far away from the supporting plate, forms the connector; the outer diameter of the second compression spring is gradually reduced from one end close to the supporting plate to one end far away from the supporting plate, and the end face, far away from the supporting plate, of the tail end of the second compression spring is located on the same plane as the end face, far away from the supporting plate, of the first compression spring; the first compression spring has an inner diameter distal to the blade end that is greater than the width of the stapes plate, and the second compression spring has an inner diameter distal to the blade end that is less than the width of the stapes arch.

Furthermore, the tail end of the second compression spring is fixedly connected with a connecting ball, the connecting ball forms the connector, and the ball diameter of the connecting ball is larger than the inner diameter of the second compression spring far away from the supporting plate end.

Further, the working surface of the supporting plate contacting with the tympanic membrane and the working surface of the connecting head contacting with the stapes are both subjected to rough treatment.

The invention has the beneficial effects that:

according to the ossicle prosthesis based on the titanium periosteum, all the structures are integrally formed, the vibration effect of the tympanic membrane is good, and the postoperative recovery effect of a patient is guaranteed.

Drawings

Figure 1 is a schematic structural view of the present invention,

figure 2 is a schematic view of the connection point of the pallet and the intermediate bar according to the invention,

figure 3 is a normal ossicular image and data measurement I,

figure 4 is a normal ossicular image and data measurement II,

figure 5 is a normal ossicular image and data measurement III,

figure 6 is a normal ossicular image and data measurement IV,

figure 7 is a normal ossicular image and data measurement V,

figure 8 is a schematic view (front view) of the connection of the pallet to the intermediate bar according to another embodiment of the present application,

figure 9 is a schematic view (right view) of a pallet according to another embodiment of the present application,

figure 10 is a schematic structural view of yet other embodiments of the present application,

figure 11 is a schematic structural view of yet further embodiments of the present application,

figure 12 is an exploded view of yet other embodiments of the present application,

fig. 13 is a schematic structural view of a second compression spring according to a further improved embodiment of the present application.

Figure number and name: 1. the middle rod 11, the first compression spring 12, the second compression spring 13, the connecting ball 2, the supporting plate 21, the reinforcing rib 3, the connector 4, the tympanic membrane 5 and the stapes.

Detailed Description

To explain the technical content, structural features, attained objects and effects of the present invention in detail, embodiments are described below in detail with reference to the accompanying drawings.

With reference to fig. 1 and 2, the ossicle prosthesis based on the titanium periosteum disclosed by the invention comprises a middle rod 1, wherein two ends of the middle rod 1 are respectively provided with a supporting plate 2 and a connector 3, the supporting plate 2 is used for connecting a tympanic membrane 4, the connector 3 is used for connecting a stapes 5, the supporting plate 2 and the connector 3 are integrally formed with the middle rod 1, and an included angle alpha between planes of the middle rod 1 and the supporting plate 2 is less than ninety degrees; the supporting plate 2 is formed into an oval shape corresponding to the shape of the tympanic membrane 4, and the connecting point of the supporting plate 2 and the middle rod 1 is not overlapped with the circle center of the supporting plate 2; the intermediate lever 1 is an elastic rod-shaped member capable of extending and contracting.

With reference to fig. 3-7, it can be seen that: after the small auditory bone implantation operation is completed, the included angle between the small auditory bone main body rod and the tympanic membrane is more common between eighty one degree and eighty four degrees; the angle α between the intermediate bar 1 and the plane of the pallet 2 is therefore eighty-two degrees.

In other embodiments of the present application, as shown in fig. 8 and 9, the working surface of the pallet 2 is recessed in the direction of the intermediate beam 1 to form a funnel-shaped structure, and the working surface of the pallet 2 is formed by a plurality of ribs 21 which are staggered with each other.

The funnel-shaped supporting plate is more matched with the actual structure of the tympanic membrane, so that cholesteatoma formed by invagination of the upper tympanic cavity or perforation formed by sedimentation of the tympanic membrane or the ear drum pushed out by the ossicle supporting plate can be effectively prevented after the ossicle is implanted into the operation; the working surface of the supporting plate is formed by staggered reinforcing ribs (similar to a cobweb structure), so that the weight of the whole auditory ossicle prosthesis is reduced as much as possible on the premise of ensuring the strength of the supporting plate; in addition, the eardrum can grow into the gap between the reinforcing ribs at the later stage, and the connecting effect of the postoperative ossicle prosthesis and human tissues is ensured; in addition, the supporting plate is made of flexible high polymer materials and can be cut according to actual operation requirements.

Referring to fig. 10, in still other embodiments of the present application, the body structure of the intermediate rod 1 is a first compression spring 11, the inner diameter of the first compression spring 11 gradually increases from the end close to the supporting plate 2 to the end away from the supporting plate 2, and the end of the first compression spring 11 away from the supporting plate 2 forms the connecting head 3. The inner diameter of the first compression spring 11 remote from the end of the blade is greater than the width of the stapes arch.

When the patient has less loss of the stapes (when the full stapes arch remains), the end of the first compression spring remote from the blade can be placed directly over the stapes arch, since the presence of the stapes arch prevents the first compression spring from disengaging from the stapes; then a plurality of tissue blocks are filled around the stent, and after the stapes related tissues grow after operation, the tissue blocks are tightly connected with the tail end of the first compression spring.

As shown in fig. 11 and 12, in further embodiments of the present application, a second compression spring 12 is fixedly connected inside the first compression spring 11, and the end of the second compression spring 12 away from the supporting plate 2 constitutes the connecting head 3; the outer diameter of the second compression spring 12 is gradually reduced from one end close to the supporting plate 2 to one end far away from the supporting plate 2, and the end face of the second compression spring 12 far away from the supporting plate 2 and the end face of the first compression spring 11 far away from the supporting plate 2 are positioned on the same plane; the first compression spring 11 has an inner diameter remote from the end of the blade which is greater than the width of the stapes plate, and the second compression spring 12 has an inner diameter remote from the end of the blade which is less than the width of the stapes arch.

When the stapes of a patient is seriously damaged due to the pathological changes (only a stapes bottom plate is left), because the stability of the first compression spring cannot be ensured due to the absence of stapes movement, the first compression spring needs to be sleeved on the stapes plate at the moment, and the tail end of the second compression spring, which is far away from the supporting plate, is tightly supported on the stapes plate under the action of elasticity, so that the middle rod formed by the first compression spring and the second compression spring cannot be separated from the stapes; then a plurality of tissue blocks are filled around the stent, and after the stapes related tissues grow after operation, the tissue blocks are tightly connected with the tail end of the first compression spring.

In a further improved embodiment of the present application, as shown in fig. 13, a connecting ball 13 is fixedly connected to the end of the second compression spring 12, the connecting ball 13 forms the connecting head 3, and the ball diameter of the connecting ball 13 is larger than the inner diameter of the second compression spring 12 at the end far from the supporting plate. Therefore, after the auditory ossicle prosthesis is implanted into an operation, at least one point of the connector is always in contact with the stapes under the action of the second compression spring, and the effect of transmitting the vibration of the tympanic membrane is ensured.

In addition, the working surface of the splint 2 contacting the tympanic membrane 4 and the working surface of the connector 3 contacting the stapes 5 are roughened. Not only conveniently be connected it with human tissues such as tympanic membrane and stapes in the art, more make things convenient for human tissues such as postoperative tympanic membrane and stapes to permeate and grow in corresponding structure, make its combination inseparabler, improve postoperative recovery effect.

Therefore, the invention is not limited to the specific embodiments and examples, but rather, all equivalent variations and modifications are within the scope of the invention as defined in the claims and the specification.

Claims

1. The utility model provides an auditory ossicle prosthesis based on titanium periosteum, includes intermediate lever (1), the both ends of intermediate lever (1) are equipped with layer board (2) and connector (3) respectively, layer board (2) are used for connecting tympanic membrane (4), connector (3) are used for connecting stapes (5), its characterized in that: the supporting plate (2) and the connector (3) are integrally formed with the middle rod (1), and an included angle between the plane where the middle rod (1) and the supporting plate (2) are located is smaller than ninety degrees; the supporting plate (2) is formed into an oval shape corresponding to the shape of the tympanic membrane (4), and the connecting point of the supporting plate (2) and the middle rod (1) is not coincident with the circle center of the supporting plate (2); the middle rod (1) is a telescopic elastic rod-shaped piece;

the body structure of the middle rod (1) is a first compression spring (11), the inner diameter of the first compression spring (11) is gradually increased from one end close to the supporting plate (2) to one end far away from the supporting plate (2), and the tail end of the first compression spring (11) far away from the supporting plate (2) forms the connector (3);

a second compression spring (12) is fixedly connected in the first compression spring (11), and the tail end of the second compression spring (12) far away from the supporting plate (2) forms the connecting head (3); the outer diameter of the second compression spring (12) is gradually reduced from one end close to the supporting plate (2) to one end far away from the supporting plate (2), and the end face, far away from the supporting plate (2), of the second compression spring (12) and the end face, far away from the supporting plate (2), of the first compression spring (11) are located on the same plane; the inner diameter of the first compression spring (11) remote from the end of the supporting plate is greater than the width of the stapes plate, and the inner diameter of the second compression spring (12) remote from the end of the supporting plate is smaller than the width of the stapes arch.

2. An ossicular prosthesis based on titanium periosteum according to claim 1, wherein: the included angle between the middle rod (1) and the plane where the supporting plate (2) is located is eighty degrees to eighty-five degrees.

3. An ossicular prosthesis based on titanium periosteum according to claim 1, wherein: the working surface of the supporting plate (2) is sunken towards the direction of the middle rod (1) to form a funnel-shaped structure.

4. An ossicular prosthesis based on titanium periosteum according to claim 3, wherein: the working surface of the supporting plate (2) is composed of a plurality of mutually staggered reinforcing ribs (21).

5. An auditory ossicle prosthesis based on a titanium periost according to claim 1 characterized in that: the tail end of the second compression spring (12) is fixedly connected with a connecting ball (13), the connecting ball (13) is formed into the connecting head (3), and the ball diameter of the connecting ball (13) is larger than that of the second compression spring (12) far away from the inner diameter of the supporting plate end.

6. An ossicular prosthesis based on titanium periosteum according to any one of claims 1-5, wherein: the working face that layer board (2) with tympanic membrane (4) contact and connector (3) with the working face that stapes (5) contact all passes through rough treatment.