Minimally invasive glaucoma drainage tube with fixing device

Abstract

The utility model discloses a minimally invasive glaucoma drainage tube with a fixing device. The minimally invasive glaucoma drainage tube comprises a drainage tube body and the fixing device. The side wall of the drainage tube body is provided with a weak part, the fixing device comprises a fixing piece, the fixing piece is arranged in the weak part, the shape of the fixing piece is matched with that of the weak part, the fixing piece is connected with the side wall of the weak part, and the top end of the fixing piece extends towards the top end of the drainage tube body. The fixing piece can automatically extend outwards to extend out of the weak portion after external binding force is removed, and the fixing piece can be completely located in the weak portion when the fixing piece retracts inwards under the action of external force. The minimally invasive glaucoma drainage tube cannot move towards the pupil direction, so that the operation effect is guaranteed, and meanwhile smooth implementation of minimally invasive implantation cannot be affected.

Description

Technical Field

[0001] This utility model relates to the field of ophthalmic surgical equipment technology, specifically to a minimally invasive glaucoma drainage tube with a fixation device. Background Technology

[0002] Subconjunctival glaucoma drainage tube implantation involves inserting an artificially designed drainage tube into the anterior chamber through a puncture needle under the conjunctiva. Figure 1 The posterior anatomical spatial relationship after implantation is shown in the figure. Figure 2 This allows the aqueous humor to be directly drained into the subconjunctival sac or subfascial sac.

[0003] The main problem with existing subconjunctival minimally invasive glaucoma drainage tubes is that, after surgery, some of the drainage tubes may shift towards the pupil (e.g., Figure 3 However, due to space limitations, such as adding a fixing device to the outer wall of the drainage tube (e.g.) Figure 4 If the needle cannot be inserted, the drainage tube cannot be implanted through a needle puncture and injection technique (i.e., the needle cannot be inserted). The drainage tube can only be implanted through a non-minimally invasive method with a larger wound, which leads to postoperative scarring and affects the success rate of the surgery. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a minimally invasive glaucoma drainage tube with a fixation device. After this minimally invasive glaucoma drainage tube is implanted, it will not shift towards the pupil due to the presence of the fixation device, thereby ensuring the safety and effectiveness of the surgery. At the same time, the fixation device will not affect the smooth progress of the minimally invasive implantation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a minimally invasive glaucoma drainage tube with a fixation device, comprising:

[0006] Drainage tube body; and

[0007] The fixing device includes a weak portion on the side wall of the drainage tube body. The fixing device includes a fixing member disposed within the weak portion. The shape of the fixing member is adapted to the weak portion. The fixing member is connected to the side wall of the weak portion. The top end of the fixing member extends towards the top end of the drainage tube body. When the external binding force is released, the fixing member can automatically extend outward from the weak portion, and when it retracts under the action of external force, the fixing member can be completely located within the weak portion.

[0008] Furthermore, there are at least two fasteners.

[0009] Furthermore, the number of the fasteners is even, and the fasteners are arranged symmetrically in pairs.

[0010] Furthermore, the weak part gradually tilts towards the central axis of the drainage tube body from its top to its bottom.

[0011] Furthermore, the bottom of the weak portion has a depth of 40-60 μm along the radial direction of the drainage tube body.

[0012] Furthermore, the inner wall of the weak part is inclined outward at 30-45° relative to the central axis of the drainage tube body.

[0013] Furthermore, the fixing device is located 3-6 mm away from the top of the drainage tube.

[0014] The beneficial effects of this utility model are:

[0015] The aforementioned minimally invasive glaucoma drainage tube with fixation device includes a drainage tube body and a fixation device. A weak portion is formed on the side wall of the drainage tube body. The fixation device includes a fixator disposed within the weak portion. The shape of the fixator is adapted to the weak portion, and the fixator is connected to the side wall of the weak portion. The top end of the fixator extends towards the top end of the drainage tube body. When external restraint is released, the fixator can automatically extend outward from the weak portion, and when retracted under external force, the fixator can be completely contained within the weak portion.

[0016] In use, first place the tail end of the drainage tube inside the puncture needle, then continue pushing the drainage tube body into the puncture needle until the entire drainage tube body is inside the puncture needle. Then, perform the drainage tube implantation procedure through the puncture needle. Once the puncture needle reaches the target position, push the drainage tube body out of the puncture needle, positioning it in the Tenons' sac under the conjunctiva. After the drainage tube body is removed from the puncture needle, the external restraint force is released, and the tip of the fixation piece automatically extends outward from the weak point and inserts into the connective tissue within the Tenons' sac. This creates an inverted loop at the implantation site, facing the pupil, thus preventing the drainage tube from moving towards the pupil.

[0017] Using the aforementioned minimally invasive glaucoma drainage tube with a fixation device, the drainage tube can be smoothly inserted into the puncture needle, and the glaucoma drainage tube implantation surgery can be completed using a minimally invasive method. Furthermore, after the drainage tube is pushed out of the puncture needle, its fixation device opens to play a limiting and fixing role, which can significantly prevent the occurrence of complications such as further displacement of the drainage tube into the anterior chamber and towards the pupil after the drainage tube is implanted. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a minimally invasive implantation method for existing glaucoma drainage tubes;

[0020] Figure 2 Anatomical spatial location diagram after minimally invasive implantation of an existing glaucoma drainage tube;

[0021] Figure 3 The existing glaucoma drainage tube was displaced towards the pupil after minimally invasive implantation.

[0022] Figure 4 A schematic diagram of installing a fixing device on the outer wall of the drainage tube;

[0023] Figure 5 A schematic diagram of a minimally invasive glaucoma drainage tube with a fixation device provided in an embodiment of this utility model;

[0024] Figure 6 for Figure 5 A schematic diagram showing the outward extension of the fixation component in a minimally invasive glaucoma drainage tube with a fixation device;

[0025] Figure 7 for Figure 1 The diagram shows the positional relationship of components in a minimally invasive glaucoma drainage tube with a fixation device.

[0026] Figure 8 for Figure 1 The diagram shows a minimally invasive glaucoma drainage tube with a fixation device during the insertion of a puncture needle.

[0027] Figure 9 for Figure 1 The diagram shown illustrates the completion of a minimally invasive glaucoma drainage tube implantation with a fixation device.

[0028] Figure label:

[0029] 1. Pupil; 100. Drainage tube body; 110. Weak point; 200. Fixation device; 210. Fixation component; 300. Puncture needle. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Please see Figures 5 to 9This utility model provides a minimally invasive glaucoma drainage tube with a fixation device 200, including a drainage tube body 100 and a fixation device 200.

[0032] Please see Figure 5 , 6 Specifically, a weak portion 110 is provided on the side wall of the drainage tube body 100. The fixing device 200 includes a fixing member 210, which is disposed in the weak portion 110. The shape of the fixing member 210 is adapted to the weak portion 110, and the bottom end of the fixing member 210 is hinged to the side of the weak portion 110 near the tail end of the drainage tube body 100. The top end of the fixing member 210 extends towards the top end of the drainage tube body 100. After the external binding force is released, the top end of the fixing member 210 can automatically extend out of the weak portion 110. When the fixing member 210 is retracted, the fixing member 210 is completely located in the weak portion 110.

[0033] See Figure 8 In use, first place the tail end of the drainage tube into the puncture needle 300, then continue to push the drainage tube body 100 into the puncture needle 300 until the entire drainage tube body 100 is within the puncture needle 300. The drainage tube is then implanted through the puncture needle 300. Once the puncture needle 300 reaches the target position, the drainage tube body 100 is pushed out of the puncture needle 300, positioning it within the Tenons' sac under the conjunctiva. After the drainage tube body 100 is removed from the puncture needle 300, the external restraint is released, and the tip of the fixation member 210 automatically extends outward from the weak part 110. The front end of the fixation member 210 is inserted into the connective tissue within the Tenons' sac. (See [reference needed]). Figure 9 This allows for the formation of an inverted shape at the implantation site, pointing towards pupil 1, and the drainage tube can then be moved in the opposite direction towards pupil 1.

[0034] In this embodiment, the number of fasteners 210 can be one. However, to improve the fixing effect, at least two fasteners 210 are provided. Preferably, the number of fasteners 210 is an even number, and the fasteners 210 are arranged symmetrically in pairs. This further improves the fixing effect.

[0035] In practical implementation, the weak point 110 and the fixing element 210 can be formed by carving on the side wall of the drainage tube body 100. When the insertion needle is inserted, the fixing element 210 automatically retracts; when it is removed from the puncture needle 300, the fixing element 210 automatically extends outward. The material of the drainage tube body 100 can be a cationic polymer material (SIBS) through cutting.

[0036] During processing, wedge-shaped cuts and transverse cuts can be made on the side wall of the drainage tube body 100 to form a weak part 110 that is inclined in a wedge shape from the top end of the drainage tube body 100 to the bottom end and gradually towards the central axis of the drainage tube body 100. The fixing part 210 is formed from the part that was not cut off.

[0037] See Figure 7 Furthermore, the depth h1 of the bottom of the weak portion 110 along the radial direction of the drainage tube body 100 can be 40-60 μm. The inclination angle of the inner wall of the weak portion 110 relative to the central axis of the drainage tube body 100 is 30-45°. This facilitates the extension or retraction of the fixing member 210. In addition, the distance h2 between the fixing device 200 and the top of the drainage tube body 100 should be 3-6 mm to ensure the fixing effect of the fixing member 210.

[0038] The aforementioned minimally invasive glaucoma drainage tube with fixation device 200 can be smoothly inserted into the puncture needle 300, and the glaucoma drainage tube implantation surgery can be completed using a minimally invasive method. Furthermore, after the drainage tube is pushed out of the puncture needle 300, its fixation device 200 opens to play a limiting and fixing role, which can significantly prevent the occurrence of complications such as further displacement of the drainage tube into the anterior chamber and towards the pupil 1 after the drainage tube is implanted.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A minimally invasive glaucoma drainage tube with a fixation device, characterized in that, include: Drainage tube body; and The fixing device includes a weak portion on the side wall of the drainage tube body. The fixing device includes a fixing member disposed within the weak portion. The shape of the fixing member is adapted to the weak portion. The fixing member is connected to the side wall of the weak portion. The top end of the fixing member extends towards the top end of the drainage tube body. When the external binding force is released, the fixing member can automatically extend outward from the weak portion, and when it retracts under the action of external force, the fixing member can be completely located within the weak portion.

2. The minimally invasive glaucoma drainage tube with fixation device according to claim 1, characterized in that, There are at least two fasteners.

3. The minimally invasive glaucoma drainage tube with fixation device according to claim 1, characterized in that, The number of the fasteners is even, and the fasteners are arranged symmetrically in pairs.

4. The minimally invasive glaucoma drainage tube with fixation device according to claim 1 or 2, characterized in that, The weak part gradually slopes towards the central axis of the drainage tube body from its top to its bottom.

5. The minimally invasive glaucoma drainage tube with fixation device according to claim 3, characterized in that, The bottom of the weak section has a depth of 40-60 μm along the radial direction of the drainage tube body.

6. The minimally invasive glaucoma drainage tube with fixation device according to claim 4, characterized in that, The inner wall of the weak part is inclined outward at 30-45° relative to the central axis of the drainage tube.

7. The minimally invasive glaucoma drainage tube with fixation device according to claim 5, characterized in that, The distance between the fixing device and the top of the drainage tube is 3-6 mm.

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