Surgical device for corneal endothelial cell scraping

Abstract

The utility model relates to the technical field of animal experiments, in particular to a surgical device for scraping corneal endothelial cells, which comprises a pushing and injecting component, a connecting component and a connecting component. The first end of the hose is connected to the connector; the first end of the sleeve is connected to the second end of the hose; the first end of the flexible scraping part is connected to the second end of the sleeve. According to the surgical device, the hard structure including the flexible silicone tube serves as a scraping component, the front end of the flexible silicone tube is exposed, the front end of the hard structure is in a hook shape, it can be guaranteed that the front end of the flexible silicone tube has reliable direction certainty, and an operator can have good controllability; in addition, the flexible scraping structure can reduce damage to cornea wounds, and due to the fact that the area of the wounds is reduced, sterility is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of animal experiments, in particular to a surgical device for scraping corneal endothelial cells. Background Art

[0002] The cornea consists of five layers: the corneal epithelium, Descemet's membrane, stroma, Descemet's membrane, and endothelium. The endothelium, located at the innermost layer of the cornea, acts as a pump, continuously discharging moisture from the stroma to maintain corneal transparency. In the event of lesions or damage to the corneal endothelium, scraping away the diseased or necrotic corneal endothelial cells promotes corneal repair and regeneration, restoring corneal transparency and normal function. As the innermost layer of the cornea, the endothelium performs both barrier and pump functions and is crucial for maintaining corneal transparency.

[0003] In the scraping surgery of corneal endothelial cells, a component with a hook-shaped end is usually used to scrape the corneal endothelial cells. For example, the technical solution shown in Patent Document 1 adopts an integrated device of a spoon body, a spoon tip and a handle. The user operates the spoon tip by holding the handle to complete the scraping of the corneal endothelial cells. A channel is provided in the handle for injecting liquid or air at the spoon tip. However, the hard spoon tip in the solution can easily cause the corneal wound to increase during operation, and the risk of bacterial infection is also increased. Therefore, the hard spoon tip is not an ideal scraping tool. For example, the technical solution shown in Patent Document 2, in the solution, a spherical expansion portion is provided at the end of the metal wire, and a silicone tube is provided outside the expansion portion, thereby increasing the flexibility of the structure and avoiding damage to the posterior elastic layer. However, the outer diameter of the silicone tube in this method is large and there is a risk of falling off. Therefore, it is necessary to propose a new surgical device for scraping corneal endothelial cells to overcome the above problems.

[0004] Prior art literature:

[0005] Patent Document 1: CN105055080A Corneal Endothelial Cell Scraper

[0006] Patent Document 2: CN216962719U A rabbit corneal endothelium scraping device Utility Model Content

[0007] In view of the technical problems existing in the conventional surgical instruments for scraping corneal endothelial cells for animal experiments, the first aspect of the present invention provides a surgical device for scraping corneal endothelial cells, comprising:

[0008] The push injection component includes a connection port;

[0009] a hose, a first end of which is connected to the connection port;

[0010] a cannula having a first end connected to the second end of the hose;

[0011] a flexible scraping member having a first end connected to the second end of the sleeve;

[0012] a hard supporting component, sleeved on the outside of the flexible scraping component to support the flexible scraping component, with a first end connected to the flexible scraping component and a second end extending toward the free end of the flexible scraping component;

[0013] Wherein, the second end of the rigid support component is provided with a hook portion, and the free end of the flexible scraping component extends in the same direction as the axis of the hook portion;

[0014] The second end of the flexible scraping component is provided with a push hole, which is connected to the push hole through the flexible scraping component, the sleeve and the channel in the hose. The push hole can push or suck liquid to the position of the second end of the flexible scraping component through the push hole.

[0015] Preferably, the free end of the flexible scraping member is constructed as a flexible hollow cylindrical structure.

[0016] Preferably, the flexible scraping component includes a main body portion and a connecting portion and an extending portion connected to both ends of the main body portion, and the main body portion is wrapped by the hard supporting component.

[0017] Preferably, the length of the hook portion is L1, the length of the extension portion is L2, and the length ratio of L1 to L2 is 2:1.

[0018] Preferably, the hard supporting component is constructed as a hollow tube structure, and the hook portion is formed by pre-bending the hollow tube structure into a predetermined angle.

[0019] Preferably, the angle between the hook portion and the hard supporting component is 90 to 100 degrees.

[0020] Preferably, the outer diameter of the extension portion is 0.5 mm to 2 mm, and the outer diameter of the hook portion is 1 mm to 2.5 mm.

[0021] Preferably, the outer wall of the sleeve is connected to a needle holder.

[0022] Preferably, the connection port of the push injection component includes a threaded connection port, and the hose is detachably connected to the connection port.

[0023] Preferably, the flexible scraping member comprises a hollow silicone tube.

[0024] Compared with the existing technology, the surgical device for scraping corneal endothelial cells proposed in the present invention uses a hard structure including a flexible silicone tube as a scraping component. The front end of the flexible silicone tube is exposed, and the front end of the hard structure is hook-shaped, which can ensure that the front end of the flexible silicone tube has reliable direction determination, which is beneficial for the surgeon to have good controllability. In addition, this flexible scraping structure can reduce damage to the corneal wound. Since the wound area is reduced, the sterility is also significantly improved.

[0025] At the same time, the flexible scraping component and the injection component are connected by a hose. During the scraping process, the injection component can continuously inject fluid forward to keep the anterior chamber full and flush out the detached tissue in time. The fact that the two are connected by a hose also makes them highly independent. The surgeon can focus more on operating the scraping component to complete the scraping operation, and the assistant can independently operate the injection component to perform injection during the operation, thereby improving the efficiency and success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic structural diagram of a surgical device for scraping corneal endothelial cells shown in the present invention.

[0028] Figure 2 It is a structural schematic diagram of the flexible scraping component shown in the present utility model. DETAILED DESCRIPTION

[0029] In order to better understand the technical content of the present invention, specific embodiments are given and described below with reference to the accompanying drawings.

[0030] like Figure 1 、 2 As shown, the surgical device for scraping corneal endothelial cells according to an embodiment of the present invention includes an injection component 10, a hose 20, a cannula 30, a flexible scraping component 50, and a hard support component 40. The injection component 10, the hose 20, the cannula 30, and the flexible scraping component 50 are sequentially connected to each other, and the hard support component 40 is provided on the outer wall of the flexible scraping component 50 to provide support therefor.

[0031] The push injection component 10 includes a connecting port 11 , a first end of the hose 20 is connected to the connecting port 11 , a first end of the sleeve 30 is connected to a second end of the hose 20 , and a first end of the flexible scraping component 50 is connected to a second end of the sleeve 30 .

[0032] Thus, the difference from the prior art is that the scraping component proposed in this application is a flexible scraping component, and unlike the flexible structure sleeved on the front end of the hard steel wire, the scraping component of the utility model is an overall flexible main body. By setting a hard support to the outside of the flexible main body to make the end of the flexible main body controllable, and scraping the endothelial cells through this flexible structure, the damage to other structures caused by the operation can be reduced, the wound can be reduced, and the flexible structure has high reliability and no risk of falling off.

[0033] At the same time, the flexible scraping component structure designed by the utility model can make the size of the flexible scraping component smaller, which is particularly suitable for scraping operations of smaller corneal endothelial cells, such as experimental animals such as experimental monkeys or experimental mice.

[0034] In a further embodiment, the second end of the flexible scraping component 50 is provided with a push hole 60, which is connected to the push component 10 through the flexible scraping component 50, the sleeve 30 and the channel in the hose 20. The push component 10 can push or suck liquid to the position of the second end of the flexible scraping component 50 through the push hole 60.

[0035] It should be understood that during an endothelial scraping operation, the purpose of the flexible scraping component 50 is to scrape the endothelial cells. The surgeon must manipulate the flexible scraping component 50 to a predetermined position, typically with one hand. The surgeon's other hand must control the state of the eyeball to facilitate the scraping of the endothelial cells. Furthermore, during the endothelial cell scraping operation, in order to maintain the filling of the anterior chamber and flush out detached endothelial cells, it is necessary to continuously inject filling fluid into the scraping portion. This requires the cooperation of the injection component 10, which can be operated independently by an assistant according to the surgeon's instructions.

[0036] In the embodiment of the present invention, since the flexible scraping component 50 (first operating structure) and the injection component 10 (second operating structure) are connected by a hose 20, the movement of the flexible scraping component 50 and the movement of the injection component 10 are relatively independent, and the two do not interfere with each other. In view of this, the operator can operate the flexible scraping component 50 more flexibly and is less affected by other components. By having the operator and the assistant operate two independent structures respectively, the operator can focus more on the scraping operation, which is conducive to improving the efficiency of the scraping operation.

[0037] As an optional embodiment, the hard support component 40 is sleeved on the outside of the flexible scraping component 50 to support the flexible scraping component 50. The first end of the hard support component 40 is connected to the flexible scraping component 50, and the second end extends toward the free end of the flexible scraping component 50.

[0038] As an optional embodiment, a hook portion 41 is provided at the second end of the hard supporting component 40 , and the extending direction of the free end of the flexible scraping component 50 is the same as the axial direction of the hook portion 41 .

[0039] It should be understood that the hook 41 limits the extension direction of the free end of the flexible scraping member 50 so that the direction of the free end of the flexible scraping member 50 is determined, thereby facilitating the user to control the position of the free end of the flexible scraping member 50 .

[0040] In an optional embodiment, the free end of the flexible scraping member 50 is constructed as a flexible hollow columnar structure. The hollow columnar structure can scrape the endothelial cells while satisfying the need for liquid extraction, and the columnar structure is not likely to cause damage to other structures.

[0041] As an optional embodiment, Figure 2 As shown, the flexible scraping member 50 includes a main body portion 52 and a connecting portion 51 and an extending portion 53 connected to both ends of the main body portion 52 . The main body portion 52 is wrapped by the hard supporting member 40 .

[0042] Optionally, the flexible scraping member 50 comprises a hollow silicone tube.

[0043] In this way, the connecting portion 51 is connected to the sleeve 30, so that the liquid guide channel formed by the hose 20, the sleeve 30 and the flexible scraping component 50 is more integrated, and the hard supporting component 40 supports the outside of the main body portion 52, so that most of the flexible scraping component 50 has a certain shape and position, that is, the flexible scraping component 50 is more operable.

[0044] In an optional embodiment, the hard supporting component 40 is constructed as a hollow tube structure, and the hook portion 41 is formed by pre-bending the hollow tube structure into a predetermined angle.

[0045] As an optional embodiment, the hard supporting component 40 is a stainless steel hollow tube, which covers the outer wall of the hollow silicone tube. The front end of the stainless steel hollow tube is bent so that the extension portion 53 can extend in a predetermined direction.

[0046] In an optional embodiment, the angle between the hook portion 41 and the hard supporting component 40 is 90 to 100 degrees.

[0047] Optionally, the length of the hook portion 41 is L1, the length of the extension portion 53 is L2, and the length ratio of L2 to L1 is 2: 1. The outer diameter of the extension portion 53 is 0.5 mm to 2 mm, and the outer diameter of the hook portion 41 is 1 mm to 2.5 mm.

[0048] In an optional embodiment, the hose 20 can be a silicone tube, and the sleeve 30 is harder than the hose 20, for example, a heat shrink tube is used. The outer wall of the sleeve 30 is connected to the needle holder 31, and the user can better control the position of the extension part 53 through the needle holder 31.

[0049] As an optional embodiment, the connection port 11 of the push injection component 10 includes a threaded connection port. The push injection component 10 can be a screw-type syringe. The end of the hose 20 is provided with a screw-type connection structure, and the hose 20 is detachably connected to the connection port 11. This facilitates replacement and removal of the syringe and ensures that the syringe does not fall off during injection and withdrawal.

[0050] Combine Figure 1 、 2 As shown, the method for scraping corneal endothelial cells using the surgical device for scraping corneal endothelial cells of the above embodiment is as follows:

[0051] S1. Make two incisions at the limbus, one opening as the surgical channel and the other as the drainage channel for the detached corneal endothelium.

[0052] S2. The surgeon holds the needle holder 31 and inserts the flexible scraper 50 parallel to the incision of the surgical corridor into the anterior chamber, especially the extension 53. The flexible tube 20 provides the surgeon and the assistant with more stable and wider operating space.

[0053] S3. The extension part 53 is directed toward the cornea, and the extension part 53 contacts the corneal endothelium, so that the corneal endothelial cells can be scraped. During the scraping of the corneal endothelial cells, the anterior chamber is continuously perfused to discharge the detached endothelial cells in time and fill the anterior chamber to avoid damaging the intraocular tissue during the operation.

[0054] During use, liquid is injected into the anterior chamber through the syringe, hose 20, needle holder 31 and flexible scraping component 50 to keep the anterior chamber full during the operation, avoiding damage to intraocular tissues such as the iris and lens caused by shallowing of the anterior chamber during the operation, thereby improving the efficiency and success rate of the operation.

[0055] While the present invention has been described above with reference to preferred embodiments, this is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A surgical device for scraping corneal endothelial cells, characterized in that: include: The injection component (10) includes a connecting port (11); A hose (20), a first end of which is connected to the connection port (11); a sleeve (30) having a first end connected to the second end of the hose (20); a flexible scraping member (50) having a first end connected to the second end of the sleeve (30); a hard supporting component (40) sleeved on the outside of the flexible scraping component (50) to support the flexible scraping component (50), with a first end connected to the flexible scraping component (50) and a second end extending toward the free end of the flexible scraping component (50); The second end of the hard supporting component (40) is provided with a hook portion (41), and the free end of the flexible scraping component (50) extends in the same direction as the axis of the hook portion (41); The second end of the flexible scraping component (50) is provided with a push hole (60), and the push hole (60) is connected with the push component (10) through the flexible scraping component (50), the sleeve (30) and the channel in the hose (20), and the push component (10) can push or suck liquid to the position where the second end of the flexible scraping component (50) is located through the push hole (60).

2. The surgical device for scraping corneal endothelial cells according to claim 1, characterized in that: The free end of the flexible scraping component (50) is constructed as a flexible hollow cylindrical structure.

3. The surgical device for scraping corneal endothelial cells according to claim 1, characterized in that: The flexible scraping component (50) comprises a main body portion (52) and a connecting portion (51) and an extending portion (53) connected to both ends of the main body portion (52). The main body portion (52) is wrapped by the hard supporting component (40).

4. The surgical device for scraping corneal endothelial cells according to claim 3, characterized in that: The length of the hook portion (41) is L1, the length of the extension portion (53) is L2, and the length ratio of L2 to L1 is 2:

1.

5. The surgical device for scraping corneal endothelial cells according to claim 1, characterized in that: The hard supporting component (40) is constructed as a hollow tube structure, and the hook portion (41) is formed by pre-bending the hollow tube structure into a predetermined angle.

6. The surgical device for scraping corneal endothelial cells according to claim 5, characterized in that: The angle between the hook portion (41) and the hard supporting component (40) is 90 to 100 degrees.

7. The surgical device for scraping corneal endothelial cells according to claim 1, characterized in that: The outer diameter of the extension portion (53) is 0.5 mm to 2 mm, and the outer diameter of the hook portion (41) is 1 mm to 2.5 mm.

8. The surgical device for scraping corneal endothelial cells according to claim 1, characterized in that: The outer wall of the sleeve (30) is connected to the needle holder (31).

9. The surgical device for scraping corneal endothelial cells according to claim 1, characterized in that: The connection port (11) of the injection component (10) comprises a threaded connection port, and the hose (20) is detachably connected to the connection port (11).

10. The surgical device for scraping corneal endothelial cells according to any one of claims 1 to 9, characterized in that: The flexible scraping member (50) comprises a hollow silicone tube.

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