Ureteral tube drawing device and ureteral stent matched with ureteral tube drawing device

Abstract

The utility model discloses a ureter extubator, which belongs to the technical field of medical instruments and particularly comprises an operating part and an application part which are made of silica gel, an operating handle and a connecting sealing joint are respectively mounted at the tail end of the operating part, and the application part mainly comprises a straight-through tube, a front-end tube and a magnet head. An arc transition design is adopted between the straight-through pipe and the front-end pipe, the magnet head is inserted and fixed to the front end of the front-end pipe, and a plurality of drainage holes A are formed in the pipe wall, close to the front end, of the front-end pipe. The middle section of the application portion at the front end of the tube drawing device is in arc transition, production of the tube drawing device is facilitated, the tube drawing device can be prevented from scratching the urethra after entering the urethra, the urethra infection risk is reduced, the magnet head at the front end of the tube drawing device is in solid design, and the magnet head is convenient to use. A permanent magnet is adopted at the magnetic suction end at the end of the ureteral stent used in cooperation with the ureteral stent, in the catheter drawing operation process, the two-way adsorption fixing effect that opposite poles of the two magnets attract each other is achieved, and the catheter taking success rate is greatly increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a ureteral tube extractor and a ureteral stent matched with the same. BACKGROUND

[0002] In a urinary system operation, the ureteral stent is a commonly used ureteral supporting device with double functions of supporting and draining. In the traditional ureteral stent, an endoscope clamp is used for tube extraction operation. Since the endoscope is a rigid instrument, the examination and tube extraction operation will increase the pain and trouble of the patient and increase the risk of urethral and bladder injury and infection. Therefore, a tube extractor without endoscope and a ureteral stent matched with the same appear on the market, such as a novel double J tube and tube extractor disclosed in the publication No. CN207666961U. In the publication, a flexible tube extractor is used to take out the double J tube (i.e. the ureteral stent) by magnetic attraction to realize the operation of taking out the tube without cystoscope (i.e. the endoscope). However, the tube extractor and the double J tube disclosed in the publication have the following problems in practice:

[0003] 1. The obtuse angle between the front end application part (i.e. the straight-through part one and the straight-through part two) is designed to be 145-160 degrees. The convex part of the angle is easy to scratch the urethra after entering the urethra, which increases the risk of urethral infection. In addition, it is difficult to produce the angle with medical plastic or silicone tube in actual application.

[0004] 2. The magnetic ring at the end of the matched double J tube is a ring-shaped stainless steel without magnetic field. When the tube extractor is used to take out the tube, the permanent magnet ring at the end of the tube extractor is used for one-way adsorption. The end of the magnet ring is a smooth surface, and the surface of the magnet ring is a circular surface. The contact area between the two is very small, and the magnetic attraction effect is limited. The adsorption may fall off during the tube extraction process, and the adsorption operation needs to be repeated many times.

[0005] Based on the above problems, the novel double J tube and tube extractor disclosed in the publication CN207666961U are further improved, and a ureteral tube extractor and a ureteral stent matched with the same are provided. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a ureteral tube extractor and a ureteral stent matched with the same to solve the above problems in the prior art.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A ureteral tube puller, comprising an operation part and an application part made of silica gel, a handle and a connecting sealing joint are respectively installed at the tail end of the operation part, the application part mainly comprises a straight-through pipe, a front-end pipe and a magnet head, a circular arc transition design is adopted between the straight-through pipe and the front-end pipe, the magnet head is fixedly inserted into the front end of the front-end pipe, and a plurality of drainage holes A are formed in the pipe wall near the front end of the front-end pipe.

[0009] Further, the drainage holes A are 2-6 and are equally distributed on the circumferential surface of the front-end pipe.

[0010] Further, the surfaces of the operation part and the application part are attached with a PVP hydrophilic coating, the front end of the operation part is inserted into the inner side of the tail end of the straight-through pipe in the application part and is fixed by an adhesive, the inner side of the tail end of the straight-through pipe is provided with an anti-falling ring, and the outer wall of the front end of the operation part is provided with an anti-falling groove for cooperating with the anti-falling ring.

[0011] Further, the magnet head adopts a solid circular cone design, and the front end of the magnet head extends out of the front-end pipe, the outer diameter of the magnet head is larger than the inner diameter of the front-end pipe, and the magnet head is inserted into the inner side of the front end of the front-end pipe to support the pipe wall of the front-end pipe and form an outward expansion part at the end of the front-end pipe.

[0012] Further, the magnet head is made of a neodymium-iron-boron strong magnet, the surface of the magnet head is provided with a gold plating layer, and the front end of the magnet head is designed as an arc-shaped concave surface.

[0013] Further, the central angle of the transition circular arc between the straight-through pipe and the front-end pipe is 30-60 degrees.

[0014] A ureteral stent, which is used in cooperation with the ureteral tube puller, comprises a stent pipe body, a plurality of drainage holes B are uniformly distributed on the stent pipe body, curved portions are arranged at both ends of the stent pipe, and the curved portions are respectively a bladder fixing end and a renal pelvis fixing end, wherein a magnetic suction end head is fixedly arranged at the end of the curved portion for the bladder fixing end.

[0015] Further, the magnetic suction end head is fixedly inserted into the inner side of the front end of the curved portion, the end surface of the other end of the magnetic suction head is designed as a spherical surface and extends out of the outer side of the curved portion, and a through hole is arranged in the middle of the magnetic suction end head for drainage.

[0016] Further, the magnetic suction end head is made of any one of a neodymium-iron-boron strong magnet or a medical-grade stainless steel with magnetism, and a gold plating layer is arranged on the surface of the magnetic suction end head.

[0017] Advantages:

[0018] The middle section of the front end application part of the tube puller is changed from the traditional obtuse angle design to an arc transition, which is not only beneficial to the production of the tube puller, but also can avoid scratching the urethra after the tube puller enters the urethra, reduces the risk of urethral infection, and the hydrophilic coating arranged on the surface of the application part is more conducive to the movement of the application part of the tube puller in the urethra.

[0019] The magnet head of the front end of the tube puller is designed as a solid, and the magnetic attraction end of the ureteral stent end used in cooperation with the tube puller is a permanent magnet with a magnetic field. During the implementation of the tube pulling operation, the bidirectional adsorption fixing effect of the double magnets with opposite poles is realized, so that the magnet head of the end of the tube puller can more easily capture the ureteral stent, and the adsorption fixing effect is much better than that of one-way adsorption, which can greatly increase the success rate of tube removal. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a ureteral tube puller structure schematic view in the embodiment one of the utility model;

[0021] Figure 2 It is a ureteral stent structure schematic view used in cooperation with the ureteral tube puller in the embodiment one in the utility model;

[0022] Figure 3 It is a ureteral tube puller cross section structure schematic view in the embodiment two of the utility model;

[0023] Figure 4 It is a ureteral stent structure schematic view used in cooperation with the ureteral tube puller in the embodiment two in the utility model.

[0024] In the drawing: 1, operation part; 101, anti-off groove; 2, application part; 201, straight-through pipe; 202, front end pipe; 203, magnet head; 204, drainage hole A; 205, outward expansion part; 206, arc concave surface; 207, anti-off ring; 3, connecting sealing joint; 4, operation handle; 5, stent pipe body; 6, drainage hole B; 7, bending part; 8, magnetic attraction end. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the utility model will be briefly introduced in combination with the drawings and the description of the embodiment or the prior art, and obviously, the following description of the structure of the drawings is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor. It should be noted that the description of these embodiment modes is used to help understand the utility model, but does not constitute a limitation on the utility model.

[0026] In response to the problems found in practice with the publicly disclosed patent technology "CN207666961U, a novel double-J stent and a stent puller," which easily scratches the urethra, is difficult to manufacture, and has poor fixation effect on the stent tube during tube removal, we propose a ureteral stent puller and a ureteral stent that works in conjunction with it; the specific solution is as follows:

[0027] Example 1:

[0028] like Figures 1-2 As shown, this embodiment provides a ureteral catheter removal device, including an operating part 1 and an application part 2 made of silicone. Both the operating part 1 and the application part 2 are coated with a layer of PVP hydrophilic coating, making the catheter removal device move more smoothly in the urethra. The tail end of the operating part 1 is respectively equipped with an operating handle 4 and a connecting sealing connector 3. The application part 2 mainly consists of a straight tube 201, a front end tube 202, and a magnetic head 203. The straight tube 201 and the front end tube 202 adopt an arc transition design, with the central angle of the transition arc between the straight tube 201 and the front end tube 202 being 30-60 degrees. This design is beneficial for the production of plastic or silicone products, and the arc design allows for smoother entry into the urethra, avoiding urethral scratches. The magnetic head 203... The device adopts a solid frustum design, and the magnet head 203 is inserted and fixed to the front end of the front end tube 202. The front end of the magnet head 203 extends out of the front end tube 202, and the outer diameter of the magnet head 203 is larger than the inner diameter of the front end tube 202. After the magnet head 203 is inserted into the inner side of the front end of the front end tube 202, it expands the tube wall of the front end tube 202 and forms an outward expansion 205 at the end of the front end tube 202. This design can ensure the stability of the insertion device between the magnet head 203 and the front end tube 202. Several drainage holes A204 are opened on the tube wall near the front end of the front end tube 202. In order to improve the drainage effect of urine in the bladder, there are 2-6 drainage holes A204, which are evenly distributed on the circumferential surface of the front end tube 202.

[0029] like Figure 2 As shown, a ureteral stent is used in conjunction with the aforementioned ureteral catheter removal device. It includes a stent body 5 with several drainage holes B6 evenly distributed on it. Both ends of the stent body have bends 7, one for fixing the bladder and the other for fixing the renal pelvis. A magnetic end 8 is fixed to the end of the bend 7 at the bladder-fixed end. One end of the magnetic end 8 is inserted and fixed to the inner side of the front end of the bend 7. A perforation for drainage is provided in the middle of the magnetic end 8, penetrating both ends. The other end of the magnetic end 8 extends outward from the bend 7.

[0030] In order to improve the stability of the connection between the tube extractor and the ureteral stent, the magnet head 203 and the magnetic end head 8 are both made of neodymium-iron-boron strong magnet, and in the process of tube extraction operation, the double-magnet opposite-pole attraction bidirectional adsorption fixing effect is realized, so that the magnet head 203 at the end of the tube extractor can more easily capture the ureteral stent, and the adsorption fixing effect is much better than that of unidirectional adsorption, which can greatly increase the success rate of tube extraction.

[0031] In order to improve the safety of urinary system operation and reduce the risk of infection, the surface of the magnetic end head 8 and the surface of the magnet head 203 are both provided with a gold plating layer, so as to improve the biocompatibility between the neodymium-iron-boron strong magnet and the human body after entering the human body.

[0032] Embodiment two:

[0033] As shown in Figure 3 , the difference between the present embodiment and embodiment one is that: in order to facilitate production, the operation part 1 and the application part 2 of the whole tube extractor are designed in a split manner, and after being produced separately, the front end of the operation part 1 is inserted into the inside of the tail end of the straight-through pipe 201 in the application part 2 and is fixed by adhesive, and in order to prevent the operation part 1 and the application part 2 from being separated, a separation-preventing ring 207 is arranged on the inside of the tail end of the straight-through pipe 201, and the outer wall of the front end of the operation part 1 is provided with a separation-preventing groove 101 for cooperating with the separation-preventing ring 207.

[0034] Embodiment three:

[0035] As shown in Figures 3-4 , the difference between the present embodiment and embodiments one and two is that: the front end of the magnet head 203 is designed as an arc-shaped concave surface 206, and the end surface of the other end of the magnetic end head 8 is designed as a spherical surface, and the magnetic end head 8 is made of medical-grade stainless steel with magnetism, and by means of the arc-shaped concave surface 206 design at the end of the magnet head 203 and the spherical surface design of the magnetic end head 8, the contact area between the magnet head 203 and the magnetic end head 8 can be increased, and the adsorption connection strength between the two can be greatly improved.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A ureteral catheter extractor, comprising an operating part (1) and an application part (2) made of silicone, the tail end of the operating part (1) is respectively provided with an operating handle (4) and a connecting sealing joint (3), characterized in that, The application part (2) is mainly composed of a straight-through pipe (201), a front-end pipe (202) and a magnet head (203), the straight-through pipe (201) and the front-end pipe (202) are designed with a circular arc transition, the magnet head (203) is fixedly inserted into the front end of the front-end pipe (202), and a plurality of drainage holes A (204) are formed in the pipe wall near the front end of the front-end pipe (202).

2. The ureteral evacuator according to claim 1, wherein, The drainage holes A (204) are 2-6 in number and are equidistantly distributed on the circumferential surface of the front-end pipe (202).

3. The ureteral evacuator according to claim 1, wherein, The surfaces of the operation part (1) and the application part (2) are attached with a PVP hydrophilic coating, the front end of the operation part (1) is inserted into the inner side of the tail end of the straight-through pipe (201) in the application part (2) and is fixed by an adhesive, the inner side of the tail end of the straight-through pipe (201) is provided with an anti-falling ring (207), and the outer wall of the front end of the operation part (1) is provided with an anti-falling groove (101) for cooperating with the anti-falling ring (207).

4. The ureteral evacuator according to claim 1, wherein, The magnet head (203) is designed as a solid circular cone, the front end of the magnet head (203) extends out of the front-end pipe (202), the outer diameter of the magnet head (203) is greater than the inner diameter of the front-end pipe (202), and the magnet head (203) is inserted into the inner side of the front end of the front-end pipe (202) to support the pipe wall of the front-end pipe (202) and form an outwardly expanded portion (205) at the end of the front-end pipe (202).

5. The ureteral evacuator according to claim 4, wherein, The magnet head (203) is made of a neodymium-iron-boron strong magnet, the surface of the magnet head (203) is provided with a gold plating layer, and the front end of the magnet head (203) is designed as an arc-shaped concave surface (206).

6. The ureteral evacuator according to claim 1, wherein, The central angle of the transition circular arc between the straight-through pipe (201) and the front-end pipe (202) is 30-60 degrees.

7. A ureteral stent, characterized in that, The ureteral stent is used in cooperation with the ureteral tube extractor according to any one of the above claims 1-6, and comprises a stent pipe body (5), a plurality of drainage holes B (6) are uniformly distributed on the stent pipe body (5), the two ends of the stent pipe are provided with curved portions (7), and the two curved portions (7) are respectively a bladder fixing end and a renal pelvis fixing end, wherein the curved portion (7) of the bladder fixing end is fixedly provided with a magnetic end head (8) at the end portion.

8. A ureteral stent according to claim 7, wherein, One end of the magnetic end head (8) is fixedly inserted into the inner side of the front end of the curved portion (7), the end surface of the other end of the magnetic end head is designed as a spherical surface and extends out of the outer side of the curved portion (7), and the middle portion of the magnetic end head (8) is provided with a through hole penetrating through the two ends of the magnetic end head (8) for drainage.

9. A ureteral stent according to claim 8, wherein, The magnetic end head (8) is made of a neodymium-iron-boron strong magnet, and the surface of the magnetic end head (8) is also provided with a gold plating layer.

Images