Glaucoma drainage valve catheter leading-in forceps

Abstract

The glaucoma drainage valve catheter leading-in tweezers comprise a tweezers body, the tweezers body comprises two tweezers handle parts, and the end faces, away from each other, of the two tweezers handle parts are provided with anti-skid lines arranged in the transverse direction; one ends of the two tweezers handle parts are closed ends, the other ends of the two tweezers handle parts are open ends, and tweezers tips are arranged at the open ends; a catheter can be clamped between the two forceps tips, and anti-skid textures are arranged on the end faces, making contact with the catheter, of the two forceps tips. The forceps tips are provided with the arc-shaped piece structures matched with the head end of the drainage valve catheter, the included angle of 135 degrees is formed between the forceps tips and the extension line of the forceps handle part, and the arc-shaped design of the arc-shaped pieces and an angle adjusting mechanism are combined, so that a doctor can firmly clamp the catheter, accurately adjust the direction of the drainage valve catheter and easily adjust the angle of a drainage tube; the device is inserted in parallel with the prefabricated tunnel and is prevented from entering a false channel.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a glaucoma drainage valve catheter introducer forceps. Background Art

[0002] Glaucoma is a blinding eye disease mainly characterized by increased intraocular pressure. Long-term high intraocular pressure can lead to optic nerve damage and irreversible visual field defects. For glaucoma patients who are ineffective in drug and laser treatments, surgical intervention is one of the important means to control intraocular pressure. Among them, glaucoma drainage valve implantation is a common surgical method. By implanting a drainage catheter and a drainage plate into the eye, aqueous humor is drained into the subconjunctival space outside the eye, thereby reducing intraocular pressure.

[0003] In glaucoma drainage valve implantation, the precise placement of the catheter is one of the key steps for the success of the surgery. The surgery generally includes the following steps: First, a conjunctival incision and a scleral flap are made on the surface of the eyeball. After fixing the drainage plate, a drainage tube tunnel is made; subsequently, the catheter of the drainage valve is inserted into the anterior chamber through the tunnel to ensure the smooth drainage of aqueous humor. Making the drainage tube tunnel requires first puncturing into the anterior chamber at about 0.5 - 1.0 mm behind the limbus gray line under the scleral flap with a syringe needle. When the needle is seen to enter the anterior chamber at the limbus, change the puncture direction to form a tunnel parallel to the iris; subsequently, insert the trimmed drainage tube through the scleral tunnel into the anterior chamber, ensuring that it is parallel to the iris after entering the anterior chamber and as far away from the cornea as possible without contacting the iris. There are the following technical defects: (1) Difficult angle control: After fixing the body part of the drainage valve disc, it is necessary to change the direction of the drainage tube so that it can be inserted parallel to the direction of the prefabricated tunnel. However, traditional tools are difficult to precisely control the angle of the drainage tube. Such angle deviation may cause the drainage tube to enter a false tract (such as the space between the sclera or conjunctival tissues) or be unable to be inserted, resulting in drainage failure or postoperative complications (such as catheter blockage, intraocular hemorrhage, or infection); (2) Unstable catheter clamping: Currently, the commonly used surgical tools are mostly ordinary micro forceps or flat-tip forceps, and the tip design of which cannot firmly clamp the head end of the glaucoma drainage valve catheter. Due to the smooth surface and small diameter of the catheter, it is particularly easy to slide or fall off when clamping and changing the direction of the catheter, resulting in difficult surgical operation; (3) Complicated surgical operation: The design of existing tools does not fully consider the convenience of surgical operation. When a doctor clamps and guides the catheter, it is necessary to repeatedly adjust the position and angle of the forceps, increasing the surgical time and operation difficulty, and also increasing the surgical risk.

[0004] Therefore, how to design a glaucoma drainage valve catheter introducer forceps that can firmly clamp the head end of the catheter to prevent sliding or falling off; how to design a glaucoma drainage valve catheter introducer forceps that can precisely guide the catheter to enter the eye parallel to the tunnel layer and avoid entering a false tract has become an urgent problem to be solved. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a pair of forceps for introducing a glaucoma drainage valve catheter to solve at least one of the above technical problems.

[0006] The technical solution of the present invention is: a pair of forceps for introducing a glaucoma drainage valve catheter, including an integrated forceps body, the forceps body is made of stainless steel, the forceps body includes two forceps handle parts, and anti-slip lines arranged horizontally are provided on the end faces of the two forceps handle parts away from each other; one end of the two forceps handle parts is a closed end, and the other ends of the two forceps handle parts are both open ends, and forceps tips are provided at the open ends, and the included angle between the forceps tips and the extension line of the forceps handle parts is 135°; any one of the forceps tips is a rectangular plate bent into an arc-shaped piece, and rounded corners are provided at the ends of the arc-shaped piece away from the forceps handle parts. A catheter can be clamped between the two forceps tips, and anti-slip textures are provided on the end faces of the two forceps tips in contact with the catheter; the width of the arc-shaped piece is 0.4 mm, and the length of the arc-shaped piece parallel to the axial direction of the catheter is 1.5 mm; the thickness of the arc-shaped piece decreases from the thickness at the end near the forceps handle part towards the end of the forceps tip.

[0007] The overall structure of the present invention uses high-rigidity medical stainless steel material to ensure that it can withstand a certain operating force during the operation without bending or deforming; the overall structure includes the forceps tips, connecting parts and forceps handle parts of the forceps, and is designed integrally to ensure the stability and durability of the overall structure; the forceps tips are designed with an arc-shaped piece structure matching the head end of the drainage valve catheter, and the width of the arc-shaped piece is 0.4 mm, which is about 2 / 3 of the outer diameter of the commonly used Ahmed glaucoma drainage valve catheter. Anti-slip textures are provided on the inner wall of the arc-shaped piece to increase the friction during clamping, ensure stable clamping of the catheter, prevent the catheter from sliding or falling off during the operation, and significantly improve the stability, accuracy and safety of the surgical operation; the length of the arc-shaped piece parallel to the axial direction of the catheter is 1.5 mm, which is convenient for stably guiding the insertion direction of the catheter; the included angle between the forceps tips and the extension line of the forceps handle parts is 135 degrees, which ensures the doctor's field of vision and meets the operation requirements; the combination of the arc-shaped design of the arc-shaped piece and the angle adjustment mechanism enables the doctor to easily adjust the angle of the drainage tube to ensure that it is inserted parallel to the prefabricated tunnel and avoid entering a false passage; the arc-shaped piece gradually becomes thinner near the end of the forceps tip, which is convenient for accurately positioning the opening of the tunnel; the forceps handle part is straight, which has the advantages of simple manufacturing and stable holding. Anti-slip lines (horizontal stripes) are provided on the surface of the forceps handle part to increase the friction during holding and prevent the hand from sliding; it solves the technical defects of unstable clamping, easy entry of the catheter into a false passage, difficult control of the catheter angle and complex surgical operation existing in the existing tools during the implantation of the glaucoma drainage valve.

[0008] The beneficial effects of the present invention:

[0009] The forceps for introducing a glaucoma drainage valve catheter of the present invention can stably hold the catheter, prevent it from sliding or falling off during the implantation process, and reduce repeated operations during the surgery; the angle formed by the forceps handle and the forceps tip helps the doctor accurately control the angle of the catheter, ensure its parallel insertion into the prefabricated tunnel, effectively reduce common complications during the surgery (such as catheter displacement, false passage formation, etc.), and reduce the surgical risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is the front view of the present invention.

[0011] Figure 2 is the top view of the present invention.

[0012] Figure 3 is the schematic diagram of the state of using the present invention to hold the catheter.

[0013] Figure 4 is Figure 3 the sectional view taken along line A-A of

[0014] In the figure: 1. Forceps tip; 2. Connecting part; 3. Forceps handle; 4. Anti-collision device; 5. Catheter; 6. Glaucoma drainage valve disk body part. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Referring to Figures 1-4 , the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0017] Example 1. A pair of forceps for introducing a glaucoma drainage valve catheter, referring to Figure 1 , Figure 3 , Figure 4, including a forceps body of an integrated structure, the forceps body is made of stainless steel. The forceps body includes two forceps handle parts 3, and anti-slip patterns arranged horizontally are provided on the end faces of the two forceps handle parts 3 that are away from each other; one end of the two forceps handle parts 3 is a closed end, and the other ends of the two forceps handle parts 3 are both open ends, and forceps tips 1 are provided on the open ends. The included angle between the forceps tips 1 and the extension line of the forceps handle parts 3 is 135°; any one of the forceps tips 1 is a rectangular plate bent into an arc-shaped piece, and rounded corners are provided at the ends of the arc-shaped piece away from the forceps handle parts 3, avoiding sharp angles from damaging tissues; a catheter 5 can be clamped between the two forceps tips 1, and anti-slip textures are provided on the end faces of the two forceps tips 1 in contact with the catheter 5; the width of the arc-shaped piece is 0.4 mm, and the length of the arc-shaped piece parallel to the axial direction of the catheter 5 is 1.5 mm; the thickness of the arc-shaped piece decreases from the end near the forceps handle part 3 towards the end of the forceps tip 1. The overall structure of the present invention uses high-rigidity medical stainless steel material to ensure that it can withstand a certain operating force during the operation without bending or deforming; the overall structure includes the forceps tips, connecting parts and forceps handle parts of the forceps, and adopts an integrated design to ensure the stability and durability of the overall structure; the forceps tips are designed with an arc-shaped piece structure matching the head end of the drainage valve catheter. The width of the arc-shaped piece is 0.4 mm, which is about 2 / 3 of the outer diameter of the commonly used Ahmed glaucoma drainage valve catheter. Anti-slip textures are provided on the inner wall of the arc-shaped piece to increase the friction during clamping, ensure stable clamping of the catheter, prevent the catheter from sliding or falling off during the operation, and significantly improve the stability, accuracy and safety of the surgical operation; the length of the arc-shaped piece parallel to the axial direction of the catheter is 1.5 mm, which is convenient for stably guiding the insertion direction of the catheter; the included angle between the forceps tips and the extension line of the forceps handle parts is 135 degrees, which ensures the doctor's field of vision while meeting the operation requirements; the combination of the arc-shaped design of the arc-shaped piece and the angle adjustment mechanism enables the doctor to firmly clamp the catheter, accurately adjust the direction of the drainage valve catheter, easily adjust the angle of the drainage tube, and insert it parallel to the prefabricated tunnel to avoid entering a false passage; the arc-shaped piece gradually becomes thinner near the end of the forceps tip, which is convenient for accurately positioning the opening of the tunnel; the forceps handle part is straight, which has the advantages of simple manufacturing and stable holding. Anti-slip patterns (horizontal stripes) are provided on the surface of the forceps handle part to increase the friction during holding and prevent the hand from sliding; it solves the technical defects of the existing tools in the implantation of glaucoma drainage valves, such as unstable clamping, easy entry of the catheter into a false passage, difficult control of the catheter angle, and complex surgical operation.

[0018] Embodiment 2: On the basis of Embodiment 1, chamfers are provided at the edges of the arc-shaped piece. The present invention adopts an arc-shaped design at the edges of the arc-shaped piece to avoid damage to the catheter or surrounding tissues caused by sharp edges.

[0019] Embodiment 3: On the basis of Embodiment 1, refer to Figure 2, an anti-collision device 4 is provided on the inner end surface of one of the forceps handle parts 3, and a special-shaped groove is provided on the inner end surface of the other forceps handle part 3. The special-shaped groove is matched with the anti-collision device 4. In the present invention, there is an anti-collision device between the two forceps handle parts. When clamping, the anti-collision device can prevent the deformation of the forceps caused by excessive clamping force, and at the same time ensure the tight alignment of the two forceps tips.

[0020] Embodiment 4: On the basis of Embodiment 3, the anti-collision device 4 includes a stud, the stud is fixed to the forceps handle part 3, and a nut is provided on the stud. In the present invention, the combination of the stud fixed to the forceps handle part and the nut can conveniently adjust the anti-collision device, prevent the deformation of the forceps caused by excessive clamping force, and at the same time ensure the tight alignment of the two forceps tips.

[0021] Embodiment 5: On the basis of Embodiment 3, any one of the forceps tips 1 is connected to the forceps handle part 3 through a connecting part 2. The connecting part 2 is of an L-shaped structure, and an arc transition is provided at the included angle of the L-shaped structure. The included angle of the L-shaped structure is an obtuse angle, the obtuse angle is 135°, and the cross bar of the L-shaped structure is connected to the forceps tip 1. In the present invention, the forceps tip and the forceps handle part are seamlessly connected through the connecting part of the L-shaped structure. After connection, the included angle between the forceps tip and the extension line of the forceps handle part is 135 degrees, which ensures the doctor's field of vision while meeting the operation requirements; the arc transition at the included angle of the L-shaped structure avoids damaging tissues at sharp angles.

[0022] Embodiment 6: On the basis of Embodiment 5, the length of the forceps body is 10 - 15 cm. In the present invention, the length of the forceps body is 10 - 15 cm to adapt to the narrow operation space in ophthalmic surgery.

[0023] Embodiment 7: On the basis of Embodiment 5, the section between the forceps handle part 3 and the vertical bar of the L-shaped structure is a variable-diameter section. A corner is provided between the variable-diameter section and the inner side surface of the forceps handle part 3. The corner is an obtuse angle, and the cross-sectional area of the variable-diameter section at the corner point is larger than the cross-sectional area of one end of the connecting part 2. In the present invention, a variable-diameter section is provided between the forceps handle part and the connecting part. By changing the section thickness or width, its elasticity and rigidity can be adjusted, reducing the elasticity to reduce the required operation force while maintaining the flexibility of clamping.

[0024] Embodiment 8: On the basis of Embodiment 5, one end of the catheter 5 protrudes from the forceps tip 1. One end of the catheter 5 is provided with an inclined surface. The other end of the catheter 5 is bent and leaves the forceps body. The other end of the catheter 5 is connected to the glaucoma drainage valve disc body part 6. In the present invention, an inclined surface is provided at one end of the catheter, enabling the doctor to easily adjust the angle of the drainage tube to ensure that it is inserted parallel to the prefabricated tunnel and avoid entering a false passage; the other end of the catheter is connected to the glaucoma drainage valve disc body part.

[0025] During specific implementation, the user holds the glaucoma drainage valve catheter introducer forceps. First, place the head end of the glaucoma drainage valve catheter 5 in the arc-shaped piece of the forceps tip 1 to ensure that the catheter 5 is firmly clamped. The direction of the drainage valve catheter can be easily adjusted through the angle between the forceps handle 3 and the forceps tip 1. After inserting the forceps tip 1 wrapped with the head end of the drainage tube into the tunnel, fix the forceps tip 1 and then slowly push the catheter 5 parallel to the direction of the pre-made tunnel into the anterior chamber. Subsequently, slightly loosen the forceps to complete the implantation operation.

[0026] The above is only the preferred implementation mode of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A glaucoma drainage valve catheter introducer forceps, comprising a forceps body with an integrated structure, characterized in that: The tweezer body is made of stainless steel. The tweezer body includes two tweezer handle parts (3). Anti-slip patterns arranged horizontally are provided on the end faces of the two tweezer handle parts (3) that are away from each other; one end of the two tweezer handle parts (3) is a closed end, and the other ends of the two tweezer handle parts (3) are both open ends. Tweezer tips (1) are provided on the open ends. The included angle between the tweezer tips (1) and the extension line of the tweezer handle parts (3) is 135°; any one of the tweezer tips (1) is a rectangular plate bent into an arc-shaped piece, and rounded corners are provided at the ends of the arc-shaped piece away from the tweezer handle parts (3). A catheter (5) can be clamped between the two tweezer tips (1). Anti-slip textures are provided on the end faces of the two tweezer tips (1) that contact the catheter (5); the width of the arc-shaped piece is 0.4 mm, and the length of the arc-shaped piece parallel to the axial direction of the catheter (5) is 1.5 mm; the thickness of the arc-shaped piece decreases from the end near the tweezer handle parts (3) towards the end of the tweezer tip (1).

2. The glaucoma drainage valve catheter introducer forceps according to claim 1, characterized in that: A chamfer is provided at the edge of the arc-shaped piece.

3. The glaucoma drainage valve catheter introducer forceps according to claim 1, wherein: An anti-collision device (4) is provided on the inner end face of one of the tweezer handle parts (3), and a special-shaped groove is provided on the inner end face of the other tweezer handle part (3). The special-shaped groove matches the anti-collision device (4).

4. A pair of forceps for introducing a glaucoma drainage valve catheter according to claim 3, characterized in that: The anti-collision device (4) includes a stud. The stud is fixed to the tweezer handle part (3), and a nut is provided on the stud.

5. A glaucoma drainage valve catheter introducer forceps according to claim 3, characterized in that: Any one of the tweezer tips (1) is connected to the tweezer handle part (3) through a connecting part (2). The connecting part (2) is an L-shaped structure. An arc transition is provided at the included angle of the L-shaped structure. The included angle of the L-shaped structure is an obtuse angle, and the obtuse angle is 135°. The horizontal bar of the L-shaped structure is connected to the tweezer tip (1).

6. The glaucoma drainage valve catheter introducing forceps according to claim 5, characterized in that: The length of the tweezer body is 10 - 15 cm.

7. A glaucoma drainage valve catheter introducing forceps according to claim 5, characterized in that: A variable-diameter section is provided between the tweezer handle part (3) and the vertical bar of the L-shaped structure. A corner is provided between the variable-diameter section and the inner side surface of the tweezer handle part (3). The corner is an obtuse angle. The cross-sectional area of the variable-diameter section at the corner point is larger than the cross-sectional area of one end of the connecting part (2).

8. A glaucoma drainage valve catheter introducing forceps according to claim 5, characterized in that: One end of the catheter (5) protrudes from the tweezer tip (1). A bevel is provided at one end of the catheter (5). The other end of the catheter (5) bends and leaves the tweezer body. The other end of the catheter (5) is connected to the glaucoma drainage valve disc body part (6).

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