CN210542040U

CN210542040U - Cornea trephine

Info

Publication number: CN210542040U
Application number: CN201920786998.0U
Authority: CN
Inventors: 陈蔚
Original assignee: Wenzhou Medical University
Current assignee: Wenzhou Medical University
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-05-19
Anticipated expiration: 2029-05-29

Abstract

The utility model provides a cornea trephine, the front end including handle and handle is equipped with cyclic annular head, sets up connecting portion between handle and the cyclic annular head, and cyclic annular head is non-perfect circular structure, and the edge of cyclic annular head is slick and sly transition's arc, and cyclic annular head is the axisymmetric figure, and preferably oval has solved to the great pathological change of the range of fatiguing, especially infectious keratitis, and current trephine can not agree with the focus form completely when boring the cornea of cutting, destroys the defect of the limbus of top and below easily, the utility model discloses a cornea trephine is applicable to the irregularly shaped cornea shape of various non-perfect circles.

Description

Cornea trephine

Technical Field

The utility model particularly relates to the technical field of ophthalmic medical equipment, concretely relates to cornea trephine.

Background

Blinding keratopathy, together with diabetic retinopathy and glaucoma, are three major blinding diseases in the world today. Blinding keratopathy is mostly caused by infectious keratitis, corneal dystrophy, corneal degeneration, or corneal trauma. Currently, the only way to revive patients with blinding keratopathy is to perform corneal transplantation. According to statistics, more than 150 patients with blindness-causing keratopathy exist in China, but because the source of the corneal donor is very limited, only about I ten thousand patients can receive the corneal transplantation operation every year. Therefore, improving the survival rate of corneal donors, perfecting corneal transplantation surgery, and reducing postoperative complications during surgery are critical to the success of corneal transplantation surgery. In the corneal transplantation operation, the process of cutting the cornea of a patient by using a corneal trephine is the most critical operation in the whole operation.

However, because the cornea is in a transverse oval shape, the existing trephine cannot completely fit with the focus shape when drilling and cutting the cornea, and is easy to damage the upper corneal limbus and the lower corneal limbus for the lesion with a large involvement range, especially infectious keratitis.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical defects existing in the prior art, the utility model provides a corneal trephine.

The utility model discloses a technical solution be: the utility model provides a cornea trephine, includes the handle, the front end of handle be equipped with cyclic annular head, handle and cyclic annular head between still be equipped with connecting portion, handle and cyclic annular head pass through connecting portion and be connected and the axis at handle place and the plane at cyclic annular head place between have the contained angle, cyclic annular head be non-perfect circular structure, the edge of cyclic annular head be slick and sly transitional arc, cyclic annular head be the axisymmetric figure.

The annular head comprises a long diameter and a short diameter which penetrate through the center of the annular head, and the long diameter and the short diameter are vertically arranged.

The length of the long diameter is 1mm greater than that of the short diameter.

The length of the long diameter is 2-13 mm.

The connecting portion be dog-leg shape, dog-leg shape's connecting portion one end link to each other and set up with the handle collineation with the handle, the other end links to each other and sets up with the plane piece coplane at cyclic annular head place with the edge of cyclic annular head.

The included angle between the connecting parts in the zigzag shape is 10-170 degrees.

The annular head is oval, and the length of the major diameter of the oval annular head is 1mm greater than that of the minor diameter of the oval annular head.

The handle, the annular head and the connecting part are of an integrated structure, the handle is made of a titanium alloy material, and the connecting part and the annular head are made of a medical stainless steel material.

The thickness of the upper end surface of the annular structure of the annular head is larger than that of the lower end surface.

The handle on whole be provided with the dull polish layer, the front end of handle be provided with a plurality of and be used for making things convenient for holding the annular lug of application of force.

The utility model has the advantages that: the utility model provides a cornea trephine, the front end including handle and handle is equipped with cyclic annular head, sets up connecting portion between handle and the cyclic annular head, and cyclic annular head is the non-normal circular structure, and the edge of cyclic annular head is slick and sly transition's arc, and cyclic annular head is the axisymmetric figure, and preferably oval has solved to the great pathological change of the range of reaching, especially infectious keratitis, and current trephine can not agree with the focus form completely when boring and cutting the cornea, destroys the marginal defect of top and below easily the utility model discloses a cornea trephine is applicable to various non-normal circular dysmorphism's cornea focus shape.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the structure of the ring-shaped head of the present invention.

Wherein 1-handle, 2-annular head, 3-connecting part, 11-annular lug.

Detailed Description

Now combine fig. 1, fig. 2 to explain further, the utility model discloses a cornea trephine, including handle 1, the front end of handle 1 be equipped with cyclic annular head 2, its characterized in that, handle 1 and cyclic annular head 2 between still be equipped with connecting portion 3, handle 1 and cyclic annular head 2 be connected through connecting portion 3 and the axis at handle 1 place and the plane at cyclic annular head 2 place have the contained angle within a definite time, cyclic annular head 2 be non-normal circular structure, the edge of cyclic annular head 2 be slick and sly transitional arc, cyclic annular head 2 be the axisymmetric figure. The annular head 2 comprises a long diameter and a short diameter which pass through the center of the annular head 2, and the long diameter and the short diameter are vertically arranged. The length of the long diameter is 1mm greater than that of the short diameter. The length of the long diameter is 2-13 mm. The annular head 2 is preferably elliptical, and the length of the major diameter of the elliptical annular head 2 is greater than the length of the minor diameter by 1 mm. The utility model provides a to the great pathological change of the scope of reaching, especially infectious keratitis, current trephine can not agree with the focus form completely when boring and cutting the cornea, destroys the defect of the limbus of top and below easily, the utility model discloses a cornea trephine is applicable to various non-perfect circle dysmorphism corneal shape.

Connecting portion 3 be dog-leg shape, dog-leg shape's connecting portion 3 one end link to each other and set up with handle 1 collineation with handle 1, the other end links to each other with the edge of cyclic annular head 2 and sets up with the plane piece coplane at cyclic annular head 2 place. The included angle between the connecting parts 3 in the zigzag shape is 10-170 degrees.

The handle 1, the annular head part 2 and the connecting part 3 are of an integrated structure, the handle 1 is made of a titanium alloy material, and the connecting part 3 and the annular head part 2 are made of a medical stainless steel material.

The thickness of the upper end surface of the annular structure of the annular head 2 is larger than that of the lower end surface.

The handle 1 on the whole be provided with the dull polish layer, the front end of handle 1 be provided with a plurality of be used for making things convenient for to hold annular lug 11 of application of force.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a cornea trephine, includes handle (1), the front end of handle (1) be equipped with cyclic annular head (2), its characterized in that, handle (1) and cyclic annular head (2) between still be equipped with connecting portion (3), handle (1) and cyclic annular head (2) pass through connecting portion (3) and be connected and the axis at handle (1) place and the plane at cyclic annular head (2) place to have the contained angle between, cyclic annular head (2) be non-normal circular structure, the edge of cyclic annular head (2) be the arc of rounding off, cyclic annular head (2) be the axisymmetric figure.

2. A corneal trephine according to claim 1, wherein the annular head (2) comprises a major axis and a minor axis extending through the centre of the annular head (2), the major and minor axes being arranged vertically.

3. A corneal trephine according to claim 2, wherein the length of the major diameter is greater than the length of the minor diameter by 1 mm.

4. A corneal trephine according to claim 2, wherein the length of the major diameter is 2-13 mm.

5. A corneal trephine according to claim 2, wherein the connecting portion (3) is in the shape of a dogleg, and one end of the dogleg-shaped connecting portion (3) is connected to the handle (1) and is arranged in line with the handle (1), and the other end is connected to the edge of the annular head (2) and is arranged coplanar with the plane member on which the annular head (2) is arranged.

6. A corneal trephine according to claim 5, wherein the angle between the zigzag-shaped connecting portions (3) is 10 ° to 170 °.

7. A corneal trephine according to claim 1, wherein the annular head (2) is elliptical, the elliptical annular head (2) having a major diameter longer than a minor diameter by 1 mm.

8. The corneal trephine according to claim 1, wherein the handle (1), the annular head (2) and the connecting part (3) are of an integral structure, the handle (1) is made of a titanium alloy material, and the connecting part (3) and the annular head (2) are made of a medical stainless steel material.

9. A corneal trephine according to claim 1, wherein the annular structure of the annular head (2) has an upper end thickness greater than a lower end thickness.

10. The corneal trephine according to claim 1, wherein the handle (1) is integrally provided with a frosted layer, and the front end of the handle (1) is provided with a plurality of annular projections (11) for facilitating force application by hand holding.