Cornea drilling and cutting device

Abstract

The utility model discloses a cornea drilling and cutting device, and relates to the technical field of cornea cutting devices. The cornea drilling and cutting device overcomes the technical defect that an existing cornea drilling and cutting device is not beneficial to standardized drilling and cutting operation. The cornea drilling and cutting device comprises a tool bit, a handle and a drilling pillow. The cutter head comprises a cutting edge part and a cutter handle part which are of an integrated structure, and the cutting edge part and the cutter handle part form a step-shaped sleeve structure; the knife handle part and the handle are detachably clamped and fixed, and the handle is provided with a window communicated with an inner cavity of the knife handle part; the drilling face is a butterfly-shaped concave face, and a drainage hole is formed in the butterfly-shaped concave face. The placement condition of the cornea within the shielding range of the tool bit can be checked through the window on the handle, so that the cornea is flatly placed on the butterfly-shaped concave surface before the handle is pressed downwards for formal drilling and cutting, and the displacement of the cornea on a drilling pillow can be found in time; according to the principle of capillarity, the cornea placed on the butterfly-shaped concave surface of the drilling pillow is tightly attached to the butterfly-shaped concave surface while the drainage hole discharges the preserving fluid on the cornea, so that bubble bulging or displacement during drilling and cutting is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of corneal cutting devices. Background Art

[0002] Before corneal transplantation surgery, it is necessary to appropriately drill and cut the donor cornea according to the size of the corneal lesion of the patient. The device for drilling and cutting the cornea includes a trephine and a drill pillow. The cornea is placed in a butterfly concave surface that fits the shape of the cornea in the drill pillow, and then the excess part of the cornea is drilled and cut off by the trephine.

[0003] Since the existing device for drilling and cutting the cornea has problems such as uneven placement of the donor cornea in the butterfly concave surface or displacement before drilling and cutting during the drilling and cutting process, problems such as non-perpendicular corneal incisions, non-roundness, and residual posterior tissue occur, resulting in complications such as poor incision healing and corneal astigmatism. Summary of the Utility Model

[0004] In summary, the purpose of the present utility model is to solve the technical deficiency that the existing device for drilling and cutting the cornea is not conducive to standardized drilling and cutting operations, and to propose a corneal drilling and cutting device.

[0005] To solve the technical deficiencies proposed by the present utility model, the technical solution adopted is as follows:

[0006] A corneal drilling and cutting device includes a cutter head, a handle, and a drill pillow; the cutter head includes a blade part and a handle part with an integrated structure, and the blade part and the handle part form a stepped sleeve structure; the handle part is fixedly connected to the handle through detachable clamping, and a window communicating with the inner cavity of the handle part is provided on the handle; the drilling surface on the drill pillow is a butterfly concave surface, and drainage holes are provided at the butterfly concave surface.

[0007] The technical solutions for further limiting the present utility model include:

[0008] A handle slot that fits the handle part is provided on the handle, the window penetrates the bottom of the handle slot, and the opening of the window is a circle with a diameter equal to or smaller than the inner diameter of the handle part.

[0009] Elastic clamping members are provided on the inner wall of the handle slot, and convex clamping blocks that cooperate with the outer wall of the handle part for clamping are provided on the elastic clamping members.

[0010] A guide post is provided at each of the four corner positions of the handle; a guide hole corresponding to the guide post is provided on the drill pillow.

[0011] Two or more scale lines are provided in the butterfly concave surface, and each scale line is arranged along the radial direction of the butterfly concave surface, and the scale interval is 1 mm.

[0012] The described drill pillow is in the shape of a cube. On the upper, lower, left, and right side surfaces of the drill pillow, there is a butterfly-shaped concave surface for corneal drilling and cutting, and anti-slip patterns are provided on the front and rear side surfaces of the drill pillow.

[0013] The described drill pillow is not white.

[0014] Furthermore, the non-white color is black, blue, yellow, or green.

[0015] The edge diameter of the butterfly-shaped concave surface is 16 mm, and the radius of curvature of the butterfly-shaped concave surface is 7.6 - 7.8 mm.

[0016] The beneficial effects of the present utility model are as follows: Through the window on the handle of the present utility model, the placement situation of the cornea within the range blocked by the tool bit can be viewed, ensuring that the cornea is flatly placed on the butterfly-shaped concave surface before the handle is pressed down for formal drilling and cutting, and any displacement of the cornea on the drill pillow can be detected in a timely manner; According to the principle of capillary action, for the cornea placed on the butterfly-shaped concave surface of the drill pillow, while the preservation liquid on the cornea is drained through the drainage holes, the cornea is closely attached to the butterfly-shaped concave surface, preventing the formation of air bubbles or displacement during drilling and cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of the tool bit and the handle of the present utility model after disassembly;

[0019] Figure 3 is a cross-sectional structural schematic diagram of the tool bit and the handle of the present utility model after disassembly;

[0020] Figure 4 is a cross-sectional structural schematic diagram of the tool bit and the handle of the present utility model in a combined connection state. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present utility model in conjunction with the accompanying drawings and the preferred specific embodiments of the present utility model.

[0022] Refer to Figures 1 to 4As shown in the figure, a corneal drilling and cutting device disclosed by the utility model includes a cutter head 1, a handle 2 and a drill pillow 3; the cutter head 1 includes a blade part 11 and a tool shank part 12 with an integral structure, and the blade part 11 and the tool shank 12 form a stepped sleeve structure; since the cutter head 1 is a vulnerable part, the cutting edge of the blade part 11 will be worn after multiple drillings. In order to facilitate the quick replacement of the cutter head 1, the tool shank part 12 and the handle 2 are fixedly connected by detachable clamping; the structure of the detachable clamping connection between the tool shank part 12 and the handle 2 also facilitates the combined use of the handle 2 and cutter heads 1 of different specifications, with better compatibility. In order to ensure that the cornea within the shielding range of the cutter head 1 is placed flat and attached to the butterfly concave surface before the handle 2 presses down to formally drill the cornea, a window 21 communicating with the inner cavity of the tool shank part 12 is provided on the handle 2; the drilling surface on the drill pillow 3 is a butterfly concave surface, and a drain hole is provided at the butterfly concave surface.

[0023] In the specific implementation process, the preferred solution is: the handle 2 is provided with a tool shank slot 22 that matches the tool shank part 12, the window 21 penetrates the bottom of the tool shank slot 22, and the opening of the window is a circle with a diameter equal to or smaller than the inner diameter of the tool shank part 12, that is, the handle 2 is provided with a stepped through hole, and the tool shank part 12 of the head cutter 1 is inserted into the stepped through hole and abuts against the edge of the tool shank part 12 through the step in the stepped through hole. The structure of the detachable clamping connection between the tool shank part 12 and the handle 2 includes an elastic clamping member 23 provided on the inner wall of the tool shank slot 22 of the handle 2, and a raised clamping block 231 that cooperates with the outer wall of the tool shank part for clamping is provided on the elastic clamping member 23. After the tool shank part 12 is inserted into the tool shank slot 22 of the handle 2, the raised clamping block 231 can be elastically clamped on the anti-slip pattern on the outer wall of the tool shank part 12, the annular clamping groove or the step at the boundary between the tool shank part 12 and the blade part 11, ensuring that the cutter head 1 and the handle 2 form a stable whole, and the two can be separated under the action of a relatively large external force.

[0024] In order to achieve the precise positioning of the handle 2 and the drill pillow 3 when the utility model drills the cornea, a guide post 24 is provided at each of the four corners of the handle 2; a guide hole 32 corresponding to the guide post is provided on the drill pillow 3.

[0025] Two or more scales are provided in the butterfly concave surface, and each scale is arranged along the radial direction of the butterfly concave surface, and the scale interval is 1 mm. The scale not only facilitates the positioning of the cornea placement, but also facilitates the identification of the drilling specifications.

[0026] Since the drill pillow 3 is also prone to wear after being used multiple times, in order to improve the utilization rate of the drill pillow 3, the drill pillow 3 is in the shape of a cube, and a butterfly concave surface for cutting the cornea is provided on each of the upper, lower, left, and right side surfaces of the drill pillow. Anti-slip patterns are provided on the front and rear side surfaces of the drill pillow 3. The drill pillow is non-white, preferably black, blue, yellow or green. When there is a donor cornea with a small area of leukoplakia but still usable, the non-white background of the drill pillow can be used to avoid the leukoplakia and other parts that affect the curative effect of corneal transplantation, and the donor cornea can be drilled. The size of the butterfly concave surface on the drill pillow 3 is preferably: the edge diameter is 16 mm, and the radius of curvature of the butterfly concave surface is 7.6-7.8 mm.

Claims

1. A corneal drilling and cutting device, comprising a cutter head, a handle and a drilling pillow; the cutter head comprises a blade portion and a handle portion of an integrated structure, the blade portion and the handle portion forming a stepped sleeve structure; characterized in that: The shank portion is fixed to the handle by detachable snap connection, and a viewing window communicating with the inner cavity of the shank portion is provided on the handle; the drilling surface on the drill pillow is a butterfly-shaped concave surface, and a drainage hole is provided on the butterfly-shaped concave surface.

2. A corneal drilling device according to claim 1, characterized in that: The handle is provided with a handle slot which matches the handle part, the viewing window passes through the bottom of the handle slot, and the window opening is a circle with a diameter equal to or smaller than the inner cavity diameter of the handle part.

3. A corneal drilling device according to claim 2, characterized in that: An elastic clamping piece is arranged on the groove wall of the knife handle slot, and a protruding clamping block which is matched and clamped with the outer wall of the knife handle is arranged on the elastic clamping piece.

4. A corneal drilling device according to claim 1, characterized in that: A guide column is respectively arranged at the four corners of the handle; and a guide hole corresponding to the guide column is arranged on the drill pillow.

5. A corneal drilling device according to claim 1, characterized in that: The butterfly-shaped concave surface is provided with more than two scales, each scale is arranged along the radial direction of the butterfly-shaped concave surface, and the scale interval is 1mm.

6. A corneal drilling device according to claim 1, characterized in that: The drilling pillow is in a cube shape, and a butterfly-shaped concave surface for drilling and cutting the cornea is provided on the upper, lower, left and right sides of the drilling pillow, and anti-slip grooves are provided on the front and rear sides of the drilling pillow.

7. A corneal drilling device according to claim 1, characterized in that: The drill pillow is non-white.

8. A corneal drilling device according to claim 7, characterized in that: The non-white color is black, blue, yellow or green.

9. A corneal drilling device according to claim 1, characterized in that: The edge diameter of the butterfly-shaped concave surface is 16 mm, and the curvature radius of the butterfly-shaped concave surface is 7.6-7.8 mm.

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