Gas injection separation needle

Abstract

This utility model relates to an air-injection separation needle, solving the problems of existing air-injection separation needles easily scratching the cornea and having low separation efficiency. It includes a needle connector connected to a syringe needle tube and a needle body. The tail end of the needle body is fixed to the needle connector. The front end of the needle body has a flat, hollow separation air-injection section, and the front end of the separation air-injection section has a gradually tapering insertion guide. The side of the separation air-injection section is arc-shaped and has two or more air injection holes. The two or more air injection holes on the side of the flat separation air-injection section allow for air injection to the bottom of the separated corneal layers, thus quickly separating the cornea into layers. Furthermore, the arc-shaped side of the flat separation air-injection section reduces the risk of corneal scratches.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a gas injection separation needle. Background Technology

[0002] Before transplantation, the donor cornea must be separated into layers. In the current process, an injection needle is usually used to inject air into the separated cornea to separate it and prevent corneal tearing. However, the existing injection needle is usually a round needle, which can easily scratch the cornea and has low air injection efficiency. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing gas injection separation needles that easily scratch the cornea and have low separation efficiency.

[0004] The technical solution adopted to solve the technical problem proposed by this utility model is as follows: The gas injection separation needle of this utility model includes a needle connection part connected to the syringe needle tube and a needle body. The tail end of the needle body is fixed on the needle connection part. The front end of the needle body is provided with a flat hollow separation gas injection part. The front end of the separation gas injection part is provided with a gradually changing insertion guide part. The side of the separation gas injection part is arc-shaped and has two or more gas injection holes.

[0005] The technical solutions that further define this utility model include: The side profile of the gas injection section is snake-head shaped, circular, elliptical, or polygonal.

[0006] The cross-section of the gas injection section is arc-shaped.

[0007] The air injection port includes a central hole located at the front end of the separation air injection section and symmetrical side holes located on both sides.

[0008] The symmetrical side holes are evenly arranged.

[0009] Through the above technical solution, the beneficial effects of this utility model are as follows: The front end of the needle body of the gas injection separation needle of this utility model is provided with a flat hollow separation gas injection part, the front end of the separation gas injection part is provided with a gradually changing insertion guide part, the side of the separation gas injection part is arc-shaped, and the side of the separation gas injection part is provided with two or more gas injection holes. The flat separation gas injection part with two or more gas injection holes can inject air into the bottom of the separated corneal layer, thereby quickly separating the cornea into layers. In addition, the flat separation gas injection part with an arc-shaped side is less likely to scratch the cornea. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the gas injection and separation part of the gas injection and separation needle of this utility model, which is shaped like a snake's head.

[0011] Figure 2 This is a side view of the structure of a gas injection separation needle according to the present invention.

[0012] Figure 3 This is a schematic diagram of the elliptical structure of the gas injection and separation part of the gas injection and separation needle of this utility model.

[0013] Figure 4 This is a schematic diagram of the polygonal structure of the gas injection and separation part of the gas injection and separation needle of this utility model.

[0014] Figure 5 This is a schematic diagram of the circular separation and injection section of the gas injection and separation needle of this utility model. Detailed Implementation

[0015] The structure of this utility model will be further described below with reference to the accompanying drawings.

[0016] Reference Figures 1 to 5 The present invention relates to an air-injection separation needle, comprising a needle connector 1 connected to a syringe needle tube and a needle body 2. The tail end of the needle body is fixed to the needle connector, and the front end of the needle body is provided with a flat, hollow separation air-injection part 21. The front end of the separation air-injection part is provided with a gradually tapering insertion guide part 22, which facilitates the insertion of the needle body into the bottom of the separated corneal layer. The side 23 of the separation air-injection part is arc-shaped to prevent the separation air-injection part from scratching the cornea, and the side of the separation air-injection part is provided with two or more air injection holes 24. The two or more air injection holes on the side of the flat separation air-injection part enable air injection into the bottom of the separated corneal layer, thereby quickly separating the cornea into layers.

[0017] In this embodiment, the side profile of the separating air injection section is snake-head shaped. In specific implementations, the separating air injection section can also be circular, elliptical, or polygonal. In this embodiment, the air injection port 24 includes a central port 241 located at the front end of the separating air injection section and symmetrical side ports 242 located on both sides. In this embodiment, there are two pairs of symmetrical side ports, evenly arranged. In specific implementations, an appropriate number of symmetrical side ports can be set as needed. This enables rapid separation of the corneal layer.

[0018] In this embodiment, the cross-section of the gas-injection separation section is arc-shaped, i.e., flat. The upper part 25 and the lower part 26 of the gas-injection separation section are arc-shaped (see...). Figure 2 This facilitates the separation of the corneal layers and makes it easier for the operator to use.

[0019] The gas injection separation needle of this invention has two or more gas injection holes on the side of the flat separation gas injection part of the needle body, which can inject gas into the bottom of the separated corneal layers and quickly separate the cornea into layers. In addition, the side of the flat separation gas injection part is arc-shaped, which makes it less likely to scratch the cornea.

[0020] Although specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of the present invention. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of the present invention.

Claims

1. A gas injection separation needle, comprising a needle connector for connection to a syringe needle tube and a needle body, wherein the tail end of the needle body is fixed to the needle connector, characterized in that: The front end of the needle body is provided with a flat, hollow separation and injection section, the front end of the separation and injection section is provided with a gradually changing insertion guide section, the side of the separation and injection section is arc-shaped, and the side of the separation and injection section is provided with two or more injection holes.

2. The gas injection separation needle as described in claim 1, characterized in that: The side profile of the gas injection section is snake-head shaped, circular, elliptical, or polygonal.

3. The gas injection separation needle as described in claim 1, characterized in that: The cross-section of the gas injection section is arc-shaped.

4. The gas injection separation needle as described in claim 1, characterized in that: The air injection port includes a central hole located at the front end of the separation air injection section and symmetrical side holes located on both sides.

5. A gas injection separation needle as described in claim 4, characterized in that: The symmetrical side holes are evenly arranged.

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