CN219645966U

CN219645966U - Middle ear bracket

Info

Publication number: CN219645966U
Application number: CN202222762179.7U
Authority: CN
Inventors: 王宇; 潘滔; 鲁兆毅
Original assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Current assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-09-08
Anticipated expiration: 2032-10-19

Abstract

The utility model relates to a middle ear support, which comprises a tympanic membrane surface, a connecting part and a tympanic membrane surface; the connecting part is a strip-shaped structure body, one end of the strip-shaped structure body is connected with the tympanic membrane surface, and the other end of the strip-shaped structure body is connected with the tympanic membrane surface; the tympanic membrane surface is a first round sheet structure provided with a V-shaped opening, and the tympanic membrane surface is provided with a second round sheet structure provided with a U-shaped opening; the openings of the V-shaped notch and the U-shaped notch face the same direction. The middle ear bracket can prevent the injured mucous membranes of the inner side wall and the outer side wall from contacting to form scar adhesion and increase the air circulation of the tympanic cavity of the middle ear.

Description

Middle ear bracket

Technical Field

The utility model relates to the technical field of artificial organs, in particular to a middle ear bracket.

Background

Tympanography is the main treatment modality for treating middle ear diseases such as chronic suppurative otitis media and middle ear cholesteatoma. The procedure involves opening the tympanic cavity, clearing inflammatory lesions in the tympanic cavity, reestablishing the ossicular chain connection to restore hearing.

Some patients develop adhesive otitis media at a long term after a tympanogram. The cause of the adhesion of middle ear operation cavity is mainly: 1. the eustachian tube is not smooth, which causes long-term negative pressure in the eustachian chamber, eardrum invagination, such as secretion of naso-nasosinusitis, nasopharyngeal swelling blocking eustachian tube orifice, or eustachian tube dysfunction; 2. inflammation of middle ear, more defects of tympanic mucosa in operation, inflammatory swelling of mucosa after operation, etc. At present, aiming at the possibly-occurring adhesive otitis media, cartilage can be placed on the inner side of the tympanic membrane in the tympanogram, and the tympanic membrane is supported by the rigidity of the cartilage to prevent the tympanic membrane from being adhered to the inner wall of the tympanic membrane. Although the cartilage can play a good role in preventing adhesion, the cartilage is difficult to completely adapt to the shape and size of the tympanic membrane, the area without the cartilage still can be invaginated and adhered, and if the placed cartilage is too large, once the cholesterol tumor in the tympanic membrane recurs, the cholesterol tumor is difficult to be discovered through the tympanic membrane in early stage, and is easy to invade deeply.

Disclosure of Invention

The utility model aims to provide a middle ear bracket, which solves the problems that the shape and the size of a tympanic membrane are difficult to be completely matched, scar adhesion is formed by contacting damaged mucous membranes of the inner side wall and the outer side wall, and the ventilation performance of a tympanic cavity of the middle ear is poor in the prior art.

In order to achieve the above object, the present utility model provides a middle ear support comprising a tympanic membrane surface, a connection part and a promontory surface; the connecting part is a strip-shaped structure body, one end of the strip-shaped structure body is connected with the tympanic membrane surface, and the other end of the strip-shaped structure body is connected with the tympanic membrane surface; the tympanic membrane surface is a first round sheet structure provided with a V-shaped opening, and the tympanic membrane surface is provided with a second round sheet structure provided with a U-shaped opening; the openings of the V-shaped notch and the U-shaped notch face the same direction.

Optionally, the tympanic membrane surface is made of degradable polymer material, the connecting part is made of degradable polymer material, and the tympanic membrane surface is made of degradable polymer material.

Optionally, the tympanic membrane face, the junction and the promontory face are coaxially disposed.

Optionally, the tympanic membrane face, the connection portion and the promontory face are integrally formed.

Optionally, the first circular sheet structure and the second circular sheet structure are respectively circular sheet structures with equal thickness.

Optionally, the radius of the tympanic membrane surface is 2-4 mm, and the thickness is 0.2-0.5 mm; the radius of the V-shaped notch is 1.5-3.5 mm, and the included angle is 25-50 degrees.

Optionally, the radius of the promontory face is 1.5-3 mm, and the thickness is 0.2-0.5 mm; the opening depth of the U-shaped notch is 1.2-2.5 mm, the arc radius of the bottom of the opening is 1-2 mm, and the central angle is 90-180 degrees.

Optionally, the connecting portion is a cylindrical structure; the length of the cylindrical structure body is 5-10 mm, and the diameter of the bottom surface is 0.5-1 mm.

Optionally, an included angle α between a plane of the tympanic membrane surface and a major diameter of the connecting portion is 70 ° to 110 °.

Optionally, an included angle β between the plane of the promontory face and the major diameter of the connecting part is 70-110 °.

Through the technical scheme, by adopting the middle ear bracket, a layer of physical isolation belt can be formed between the outer side wall (tympanic membrane) of the tympanic cavity and the inner side wall (promontory of the tympanic cavity) of the tympanic cavity within a period of time after operation, so that the damaged mucous membrane of the inner side wall and the outer side wall can be prevented from contacting to form scar adhesion; in addition, the middle ear bracket structure can enable the middle ear tympanic cavity to have more space, and can increase the air circulation of the middle ear tympanic cavity. In addition, the utility model adopts degradable polymer materials, so that the middle ear bracket can be slowly degraded in the use process, and secondary injury caused by surgical removal is avoided.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

fig. 1 is a schematic view of the structure of a middle ear support according to the utility model.

Fig. 2 is a schematic representation of the tympanic membrane surface of a middle ear support of the present utility model.

Fig. 3 is a schematic representation of the promontory of a middle ear support of the present utility model.

Fig. 4 is a side view of a middle ear support of the present utility model.

Description of the reference numerals

1. A tympanic membrane surface; 2. a promontory of the drum; 3. v-shaped notch; 4. u-shaped notch; 5. and a connecting part.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper and lower" are used to refer generally to the upper and lower of the device in normal use, for example with reference to the orientation of the drawing of fig. 1, and "inner and outer" are used with respect to the outline of the device.

As shown in fig. 1, the present utility model provides a middle ear scaffold comprising a tympanic membrane surface 1, a junction 5 and a promontory surface 2; the connecting part 5 is a strip-shaped structure body, one end of the strip-shaped structure body is connected with the tympanic membrane surface 1, and the other end of the strip-shaped structure body is connected with the tympanic membrane surface 2; the tympanic membrane surface 1 is of a first round sheet structure provided with a V-shaped opening 3, and the promontory surface 2 is of a second round sheet structure provided with a U-shaped opening 4; the openings of the V-shaped notch 3 and the U-shaped notch 4 face the same direction.

Through the technical scheme, by adopting the middle ear bracket, a layer of physical isolation belt can be formed between the outer side wall (tympanic membrane) of the tympanic cavity and the inner side wall (promontory of the tympanic cavity) of the tympanic cavity within a period of time after operation, so that the damaged mucous membrane of the inner side wall and the outer side wall can be prevented from contacting to form scar adhesion; in addition, the middle ear bracket structure can enable the middle ear tympanic cavity to have more space, and can increase the air circulation of the middle ear tympanic cavity.

According to the present utility model, the drumhead 1 is a drumhead made of a degradable polymer material, the connecting part 5 is a connecting part made of a degradable polymer material, and the drumhead 2 is a drumhead made of a degradable polymer material. The utility model adopts degradable polymer materials, can lead the middle ear bracket to be slowly degraded in the using process, and avoid secondary injury caused by surgical removal.

In one embodiment, in order to enable the middle ear support to match the middle ear tympanic cavity, in particular to leave space for the malleus stem or artificial auditory ossicles near the tympanic membrane surface 1 and space for the stapes floor near the tympanic membrane surface 2, the V-shaped notch 3 on the tympanic membrane surface 1 and the U-shaped notch 4 on the tympanic membrane surface 2 can be set to have the same orientation or different orientations; for example, in one specific embodiment of the utility model, the V-shaped notch 3 in the tympanic membrane surface 1 and the U-shaped notch 4 in the tympanic membrane surface 2 of the middle ear support are both oriented upward.

In a preferred embodiment, the tympanostum face 1, the junction part 5 and the promontory face 2 may be coaxially arranged such that the junction part between the junction part 5 and the tympanostum face 1 and the promontory face 2 is not easily broken. To further enhance the mechanical strength of the middle ear support, the tympanic membrane surface 1, the junction 5 and the promontory surface 2 may be integrally formed.

As shown in fig. 2, the first circular sheet structure in the middle ear support of the present utility model may be a circular sheet structure with equal thickness, so that the tympanic membrane can be contacted with the tympanic membrane surface 1 as much as possible, and the function of protecting the tympanic membrane is achieved; the radius R of the tympanic membrane surface 1 is 2-4 mm, preferably 2.5-3.5 mm, and more preferably 3mm; the thickness is 0.2-0.5 mm; preferably 0.3 to 0.4mm, more preferably 0.3mm.

In one embodiment, the parameters of the V-shaped notch 3 on the tympanic membrane surface 1 include: the included angle gamma is 25-50 degrees, preferably 30-45 degrees, and more preferably 40 degrees; the radius r' is 1.5 to 3.5mm, preferably 2 to 3mm, more preferably 2.5mm.

In the above embodiment, the arrangement of the tympanic membrane surface 1 can make room for the malleus stem or artificial ossicles in the vicinity of the tympanic membrane with a greater degree of support of the tympanic membrane.

As shown in fig. 3, the second circular sheet structure in the middle ear support according to the present utility model may be an equal-thickness circular sheet structure, and the radius r of the promontory face 2 is 1.5-3 mm, preferably 2-2.5 mm, and more preferably 2.5mm; the thickness is 0.2 to 0.5mm, preferably 0.3 to 0.4mm, and more preferably 0.3mm.

In one embodiment, the opening depth of the U-shaped notch 4 is 1.2-2.5 mm, the circular arc radius of the bottom of the opening is 1-2 mm, and the central angle is 90-180 degrees.

As shown in fig. 4, the connecting portion 5 is a cylindrical structure; the length of the cylindrical structure is 5 to 10mm, preferably 7 to 8mm, and more preferably 7mm; the diameter of the bottom surface is 0.5 to 1mm, preferably 0.7 to 0.8mm, and more preferably 0.75mm.

Wherein an included angle alpha between the tympanic membrane surface 1 and the connecting part 5 in the middle ear bracket is 70-110 degrees, preferably 80-100 degrees, and more preferably 90 degrees; the angle β between the promontory face 2 and the junction 5 is 70 to 110 °, preferably 80 to 100 °, and more preferably 90 °.

In the above embodiment, the middle ear bracket can be more tightly supported in the tympanic cavity of the middle ear by limiting the parameters, so that the middle ear bracket has better postoperative recovery effect.

In one embodiment, the middle ear scaffold is comprised of a degradable polymeric material, including, but not limited to, a combination of one or more of the following: degradable polyurethane, degradable polyester, starch, cellulose, collagen, nitrocellulose or polymer materials blended with polylactic acid and polyglycolic acid, and the like. Preferably, a polymeric material is used that is a blend of polylactic acid and polyglycolic acid. The stent surface may or may not be optionally coated with one or more drugs. The medicine can adopt steroid hormone (such as dexamethasone, mometasone furoate, fluticasone furoate, etc.) and antibiotics (cephalosporins, macrolides, aminoglycosides, etc.), or the combination of the above medicines.

In the embodiment, the support is supported by the degradable substance, can be automatically degraded after the postoperative recovery period, does not need to be taken out by operation, and avoids secondary injury; in addition, the stent coating slow-release drug has the effects of resisting inflammation, relieving swelling and promoting mucous membrane repair, is beneficial to the postoperative middle ear surgical cavity repair and improves the surgical effect. In addition, the material used for the connection part 5 may allow the connection part 5 to be bent when the connection part 5 is long, so that the drumhead 1 and the promontory 2 can play a good supporting role.

The middle ear bracket of the first aspect of the utility model is generally applied to tympanic forming operation cases with serious middle ear lesions, more mucous membrane loss or obvious mucous membrane swelling, thereby providing a feasible scheme for preventing postoperative adhesion for operators. The specific application method comprises the following steps: part of the tympanic membrane surface 1 is attached to the tympanic membrane, and part of the tympanic membrane surface 2 is attached to the tympanic membrane.

The middle ear bracket has the following beneficial effects: 1. a layer of physical isolation belt is formed between the outer side wall (tympanic membrane) of the drum and the inner side wall (promontory) of the drum within a period of time after operation, so that the scar adhesion is avoided due to the contact of the damaged mucous membranes of the inner side wall and the outer side wall. 2. The material with certain elasticity and hardness is adopted, the shape of the support is similar to a dumbbell shape, and the support supports the tympanic cavity of the middle ear, thereby being beneficial to ventilation and drainage. 3. The stent coating slow-release medicine has the effects of resisting inflammation, relieving swelling and promoting mucous membrane repair, is beneficial to the postoperative middle ear cavity repair and improves the operation effect.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims

1. A middle ear scaffold, characterized in that it comprises a tympanic membrane surface (1), a junction (5) and a promontory surface (2); the connecting part (5) is a strip-shaped structure body, one end of the strip-shaped structure body is connected with the tympanic membrane surface (1), and the other end of the strip-shaped structure body is connected with the tympanic membrane surface (2);

the tympanic membrane surface (1) is of a first round sheet structure provided with a V-shaped opening (3), and the tympanic membrane surface (2) is of a second round sheet structure provided with a U-shaped opening (4); the openings of the V-shaped notch (3) and the U-shaped notch (4) face the same direction.

2. A middle ear support according to claim 1, wherein the tympanic membrane surface (1) is a tympanic membrane surface made of a degradable polymer material, the connecting part (5) is a connecting part made of a degradable polymer material, and the tympanic membrane surface (2) is a tympanic membrane surface made of a degradable polymer material.

3. A middle ear support according to claim 1, wherein the tympanic membrane surface (1), the connection (5) and the promontory surface (2) are coaxially arranged.

4. A middle ear support according to claim 1, wherein the tympanic membrane face (1), the connection part (5) and the promontory face (2) are integrally formed.

5. A middle ear support according to claim 1, wherein the first and second circular sheet structures are each circular sheet structures of equal thickness.

6. A middle ear support according to claim 1, wherein the tympanic membrane surface (1) has a radius of 2-4 mm and a thickness of 0.2-0.5 mm; the radius of the V-shaped notch (3) is 1.5-3.5 mm, and the included angle is 25-50 degrees.

7. A middle ear support according to claim 1, wherein the cape face (2) has a radius of 1.5-3 mm and a thickness of 0.2-0.5 mm; the opening depth of the U-shaped notch (4) is 1.2-2.5 mm, the radius of the circular arc at the bottom of the opening is 1-2 mm, and the central angle is 90-180 degrees.

8. Middle ear support according to claim 1, characterized in that the connection part (5) is a cylindrical structure; the length of the cylindrical structure body is 5-10 mm, and the diameter of the bottom surface is 0.5-1 mm.

9. A middle ear support according to claim 1, wherein the plane of the tympanic membrane (1) is at an angle α of 70-110 ° to the major diameter of the connection (5).

10. A middle ear support according to claim 1, wherein the angle β between the plane of the promontory face (2) and the major diameter of the junction (5) is 70-110 °.