Plugging device

Abstract

The utility model discloses a plugging device and relates to the technical field of medical instruments.The plugging device comprises a plugging body used for stretching in along a ureter, the plugging body is provided with a deformation wire made of memory alloy, and the deformation wire can deform to form a plugging structure when heated; therefore, one side of the calculus in the ureter, which is close to the kidney, is blocked. According to the plugging device, the deformation wire made of the memory alloy can automatically deform to form the plugging structure when the temperature rises, the problems that an existing plugging device is complex in structure, large in operation difficulty and prone to causing damage to the ureter wall are effectively solved, the simple, reliable and safe plugging effect is achieved, and the safety and efficiency of an operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a plugging device. BACKGROUND

[0002] In the lithotripsy surgery of urology, in order to effectively discharge the stone particles, it is usually necessary to pass circulating water into the ureter through an endoscope to help the discharge of the stone particles. However, this operation mode has certain limitations. Due to the complex structure of the ureter, which is curved and may have narrow parts, small stone particles may enter the deep kidney calyx along with the water flow during the stone crushing process, making it difficult to completely remove them, and even possibly causing further damage to the patient.

[0003] The existing plugging device can prevent the drift of stones and stone particles to a certain extent, but has obvious defects. For example, the structure of the existing plugging device is complex, and accurate control is required during operation, which increases the difficulty and time cost of the surgery. In addition, the complex structure design may cause the device to move poorly in the ureter, especially at the curved and narrow parts of the ureter, which is easy to cause damage to the ureter wall, affecting the safety and effectiveness of the surgery. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a plugging device that can automatically deform into a plugging structure when heated by using a deformation wire made of a memory alloy, effectively solving the problems of complex structure, high operation difficulty and easy damage to the ureter wall of the existing plugging device, achieving a simple, reliable and safe plugging effect, and improving the safety and efficiency of the surgery.

[0005] To achieve the above-mentioned purpose, the present application provides a plugging device, which comprises a plugging main body for extending along the ureter, wherein the plugging main body is provided with a deformation wire made of a memory alloy, and the deformation wire can deform into a plugging structure when heated, thereby plugging on the side of the kidney to which the stone in the ureter deviates.

[0006] In some embodiments, the deformation wire is in a straight line shape before heating, and the plugging structure is in a funnel shape after heating.

[0007] In some embodiments, the funnel shape has a first end portion and a second end portion, the diameter of the first end portion is smaller than that of the second end portion, the first end portion is arranged to face the kidney, and the second end portion is arranged to face the stone.

[0008] In some embodiments, the plugging device further comprises an elastic wire, and the elastic wire is wound around the plugging main body.

[0009] In some embodiments, the plugging main body comprises a first pipe and a second pipe.

[0010] The first pipe, the deformed wire and the second pipe are connected in sequence.

[0011] In some embodiments, the elastic wire is wound around the first pipe and the second pipe.

[0012] In some embodiments, the first pipe, the deformed wire and the second pipe are integrally formed.

[0013] In some embodiments, the first pipe has a first end and a second end, the second end of the first pipe is connected with the deformed wire, and the pipe diameter of the first pipe increases from the first end to the second end.

[0014] The second pipe has a first end and a second end, the first end of the second pipe is connected with the deformed wire, and the pipe diameter of the second pipe is constant from the first end to the second end.

[0015] In some embodiments, the occlusion body is made of a nickel-titanium memory alloy.

[0016] In some embodiments, the occlusion device further comprises an elastic film, and the elastic film covers the deformed wire.

[0017] With respect to the above background technology, the occlusion device provided by the present application mainly comprises an occlusion body for extending along the ureter, the occlusion body is provided with a deformed wire made of a memory alloy, and the deformed wire can be deformed to form an occlusion structure when heated, so as to be occluded on one side of the kidney where the stone in the ureter deviates.

[0018] In the lithotripsy surgery of urology, the existing occlusion device has many defects, such as complex structure, large operation difficulty and easy to cause damage to the ureteral wall. In view of these problems, the present application provides an innovative occlusion device, the core of which is a deformed wire made of a memory alloy, which can automatically deform under specific temperature conditions to form an effective occlusion structure.

[0019] Specifically, the occlusion device mainly includes an occlusion main body for extending along the ureter, and the key innovation point is that the occlusion main body is provided with deformation wires. The deformation wires are made of a memory alloy and have unique shape memory characteristics. In a low temperature state (such as room temperature), the deformation wires remain in a straight shape, facilitating the smooth insertion of the device into the ureter through a ureteroscope or a catheter. When the device reaches the predetermined position, the deformation wires will automatically respond and change shape by changing the temperature, including but not limited to body temperature change, injection of hot water, etc., and finally form a cluster, funnel or other suitable occlusion structure with a diameter larger than that of the original deformation wire. This structure can jointly hinder the flow of stones in the ureter, especially effectively occlude the flow of stones deviating to one side of the kidney, preventing stone particles from entering the deep kidney.

[0020] The ingeniousness of this design is that it takes advantage of the shape memory effect of the memory alloy, avoiding the drawbacks of traditional occlusion devices that require complex mechanical structures or manual operation to achieve occlusion. The automatic deformation capability of the memory alloy not only simplifies the structure of the device, but also reduces the complexity of surgical operation and the risk of damage to the ureteral wall caused by improper operation. At the same time, since the deformation wires can automatically expand at body temperature, this occlusion device can better adapt to the structural differences of different patients' ureters, improving the safety and reliability of the operation.

[0021] In combination with the above structure and process description, it can be seen that the occlusion device has at least the following beneficial effects: the occlusion device, by using deformation wires made of a memory alloy, can automatically deform to form an occlusion structure when heated, effectively solving the problems of complex structure, high operation difficulty and easy damage to the ureteral wall of existing occlusion devices, achieving a simple, reliable and safe occlusion effect, and improving the safety and efficiency of the operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0023] Figure 1 a schematic diagram of the occlusion device provided by the embodiments of the present application;

[0024] Figure 2 a schematic diagram of the occlusion structure provided by the embodiments of the present application;

[0025] Figure 3 a position diagram of the stone in the ureter;

[0026] Figure 4 Effect diagram of endoscope probe lithotripsy;

[0027] Figure 5 Position diagram of the occlusion device provided by the embodiment of the present application in the ureter;

[0028] Figure 6 Schematic diagram of the first pipe and the elastic wire provided by the embodiment of the present application;

[0029] Figure 7 Schematic diagram of the second pipe and the elastic wire provided by the embodiment of the present application.

[0030] Wherein:

[0031] The occlusion device 100,

[0032] The occlusion main body 1, the deformation wire 11, the first pipe 12, the second pipe 13, the occlusion structure 101,

[0033] The elastic wire 2, the welding point 21,

[0034] The ureter 01, the calculus 02, the kidney 03, the bladder 04, the endoscope probe 05. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] Please refer to Figures 1 to 5 Wherein, Figure 1 Schematic diagram of the occlusion device provided by the embodiment of the present application, Figure 2 Schematic diagram of the occlusion structure provided by the embodiment of the present application, Figure 3 Position diagram of the calculus in the ureter, Figure 4 Effect diagram of endoscope probe lithotripsy, Figure 5 Position diagram of the occlusion device provided by the embodiment of the present application in the ureter.

[0038] In a first specific embodiment, the occlusion device 100 provided by the present application mainly comprises an occlusion body 1 for extending along the ureter 01, and the occlusion body 1 is provided with a deformation wire 11 made of a memory alloy, which can be deformed to form an occlusion structure 101 at a high temperature, so as to be occluded on one side of the stone 02 deviated to the kidney 03 in the ureter 01.

[0039] In the lithotripsy surgery of urology, the existing occlusion device has many defects, such as complex structure, high operation difficulty and easy to cause damage to the ureter wall. In view of these problems, the present application provides an innovative occlusion device 100, the core of which is to use a deformation wire 11 made of a memory alloy, which can automatically deform under certain temperature conditions to form an effective occlusion structure 101.

[0040] Specifically, the occlusion device 100 mainly comprises an occlusion body 1 for extending along the ureter 01, and the key innovation point is that the deformation wire 11 is arranged on the occlusion body 1. The deformation wire 11 is made of a memory alloy and has unique shape memory characteristics. In a low temperature state (such as room temperature), the deformation wire 11 maintains a straight shape, which facilitates the device to be smoothly inserted into the ureter 01 through a ureteroscope or a catheter. When the device reaches the predetermined position, the deformation wire 11 will automatically respond and change shape by changing the temperature, including but not limited to body temperature change, injection of hot water, etc. Finally, a group, funnel or other suitable occlusion structure 101 with a larger diameter than the original deformation wire 11 is formed. This structure can jointly hinder the flow of the stone 02 in the ureter 01, especially effectively occlude the flow of the stone 02 deviated to the kidney 03 side, and prevent the stone particles from entering the deep part of the renal calyx.

[0041] The ingeniousness of this design is that it takes advantage of the shape memory effect of the memory alloy, avoiding the drawbacks of traditional occlusion devices that need complex mechanical structures or manual operation to achieve occlusion. The automatic deformation capability of the memory alloy not only simplifies the structure of the device, but also reduces the complexity of the operation and the risk of damage to the ureter 01 wall due to improper operation. At the same time, since the deformation wire 11 can automatically expand at body temperature, this occlusion device 100 can better adapt to the structural differences of different patients' ureters 01, improving the safety and reliability of the operation.

[0042] In combination with the above structure and process description, it can be seen that the occlusion device 100 has at least the following beneficial effects: the occlusion device 100 uses a deformation wire 11 made of a memory alloy, which can automatically deform to form an occlusion structure 101 at a high temperature, effectively solving the problems of complex structure, high operation difficulty and easy damage to the ureter 01 wall of the existing occlusion device, achieving a simple, reliable and safe occlusion effect, and improving the safety and efficiency of the operation.

[0043] It should be noted that the change of the deformed wire 11 to the occlusion structure 101 is the overall assembly after the deformed wire 11 in a wire shape is deformed. The purpose of this change is to form an effective occlusion structure 101 in the ureter 01 to hinder the flow of the calculus 02, especially to prevent the flow of the calculus 02 to the side of the kidney 03. The present embodiment does not limit the specific shape of the deformed wire 11 after deformation, as long as the overall structure changes compared to the original wire shape and can achieve the occlusion function, which is within the allowable range of the present embodiment. Therefore, whether it is a lump shape, a spherical shape, an umbrella shape or any other shape that can achieve the occlusion function, it belongs to the protection scope of the present application.

[0044] In some embodiments, the deformed wire 11 is in a straight line shape before heating, and the occlusion structure 101 is in a funnel shape after heating.

[0045] In the present embodiment, the design of the deformed wire 11 has a unique temperature response characteristic, and the shape change under different temperature conditions is the key mechanism to achieve the occlusion function. Specifically, the deformed wire 11 remains in a straight line shape at low temperature (such as room temperature), which facilitates the smooth insertion of the occlusion device 100 into the ureter 01 through the ureteroscope or catheter, ensuring the ease and flexibility of the device during the implantation process. The straight line shape of the deformed wire 11 has high stability and flexibility at low temperature, which can adapt to the structure of the ureter 01 and reduce the risk of damage to the ureter wall.

[0046] When the occlusion device 100 reaches the predetermined position, the deformed wire 11 begins to change shape as the temperature rises (for example, through body temperature or injection of hot water, etc.). Finally, the deformed wire 11 forms a funnel-shaped occlusion structure 101. The funnel-shaped design has important functional significance. The funnel-shaped occlusion structure 101 can closely fit the inner wall of the ureter 01, forming an effective occlusion barrier to hinder the flow of the calculus 02, especially to prevent the flow of the calculus 02 to the side of the kidney 03. This shape change not only improves the reliability of the occlusion effect, but also better adapts to the structural differences of the ureter 01 of different patients, enhancing the universality and applicability of the occlusion device 100.

[0047] As shown in Figure 2 The occlusion structure 101 is formed by the coiled deformation of the deformed wire 11. The deformed wire 11 itself is made of a shape memory alloy, which has a unique shape memory characteristic and can automatically change shape under certain temperature conditions. In a low temperature state, the deformed wire 11 remains in a straight line shape, facilitating the smooth insertion of the occlusion device 100 into the ureter 01. When the temperature rises, the deformed wire 11 will gradually coil and wind according to the preset shape memory program, and finally form an occlusion structure 101 with a certain shape and structure.

[0048] The process of coiling is a manifestation of the properties of shape memory alloy. During the heating process, the microstructure inside the deformed wire 11 changes, leading to a change in shape on the macro level. Specifically, the deformed wire 11 gradually bends and coils from a straight state, forming shapes similar to a ball, an umbrella, or other suitable shapes. These shape changes allow the deformed wire 11 to closely fit the inner wall of the ureter 01, thereby achieving an effective occlusion function. The formation process of the occlusion structure 101 is continuous and controllable, ensuring the reliability and safety of the occlusion device 100 during surgery.

[0049] Through the coiling deformation of the deformed wire 11, the occlusion structure 101 not only achieves effective occlusion of the stone 02 in the ureter 01, but also adapts to the anatomical differences of different patients' ureters 01. This design fully utilizes the shape memory effect of shape memory alloy, avoiding the drawbacks of traditional occlusion devices that require complex mechanical structures or manual operation to achieve occlusion, simplifying the surgical operation process, reducing the risk of surgery, and improving the safety and efficiency of surgery.

[0050] In some embodiments, the funnel shape has a first end and a second end, the first end has a smaller diameter than the second end, the first end faces the kidney 03, and the second end faces the stone 02.

[0051] In this embodiment, the funnel-shaped occlusion structure 101 has clear structural features and functional layout. The funnel-shaped occlusion structure 101 has two ends: a first end and a second end. The first end has a smaller diameter, while the second end has a larger diameter. This design allows the open end of the funnel shape (the second end) to face the stone 02, while the narrower end (the first end) faces the kidney 03.

[0052] This structural layout has important functional significance. The larger diameter of the second end can effectively cover the area where the stone 02 is located, forming a wide barrier surface to prevent stone fragments from flowing to the kidney 03 side during the lithotripsy procedure. Because the second end has a larger diameter, it can better adapt to the shape of the inner wall of the ureter 01, ensuring a close fit between the occlusion structure 101 and the ureter wall, thereby improving the reliability and stability of the occlusion effect.

[0053] At the same time, the smaller diameter of the first end faces the kidney 03, which helps to reduce the pressure and damage to the inner wall of the ureter 01. Through this ingenious structural design, the occlusion device 100 can effectively prevent stone 02 fragments from entering the kidney 03 while minimizing the risk of damage to the ureter 01 wall, improving the safety and efficiency of the surgery.

[0054] Please refer to Figure 6 andFigure 7 , Figure 6 This is a schematic diagram of the first tubular component and the elastic winding wire provided in the embodiments of this application. Figure 7 This is a schematic diagram of the second tube and the elastic winding provided in the embodiments of this application.

[0055] In some embodiments, the sealing device 100 further includes an elastic winding 2, which is wound around the sealing body 1.

[0056] In this embodiment, the occlusion device 100 is designed not only to include a deformable wire 11 made of shape memory alloy, but also to incorporate an elastic winding wire 2. The elastic winding wire 2 is wound around the occlusion body 1, and its main function is to increase the overall strength and stability of the occlusion device 100. By winding the elastic winding wire 2 around the occlusion body 1, the durability and reliability of the device during the surgical procedure can be effectively improved, ensuring that the occlusion structure 101 can withstand certain pressure and tension during its formation and use.

[0057] The placement of the elastic winding 2 is not specifically limited in this embodiment, meaning it can be flexibly wound around any part of the occlusion body 1 to meet different design needs and functional requirements. This design flexibility provides more possibilities for the optimization of the occlusion device 100, and also enables the device to better adapt to different surgical scenarios and differences in patient anatomy. By adding the elastic winding 2, the occlusion device 100 achieves effective occlusion while further improving its stability and safety under complex surgical conditions.

[0058] Alternatively, the elastic winding 2 is made of stainless steel and is wound around the outside of the sealing body 1 in a spring-like structure.

[0059] In some cases, a weld point 21 is provided at the end of the elastic winding 2 to fix the elastic winding 2 to the sealing body 1 by welding. More specifically, the weld point 21 is located at the first end of the first pipe fitting 12.

[0060] In some embodiments, the sealing body 1 includes a first fitting 12 and a second fitting 13; wherein the first fitting 12, the deformable wire 11, and the second fitting 13 are connected in sequence.

[0061] In this embodiment, the sealing body 1 is formed by sequentially connecting a first tube 12, a deformable wire 11, and a second tube 13 to form an integral structure. The first tube 12 can be considered the upper section of the sealing body 1, the deformable wire 11 the middle section, and the second tube 13 the lower section. This segmented design allows the sealing device 100 to better adapt to the needs of surgical procedures during use.

[0062] Specifically, the first tube 12 serves as the upper section of the occlusion body 1 and is the first part inserted into the ureter 01. Its design and size allow the occlusion device 100 to smoothly enter the ureter 01 and guide the subsequent deformation wire 11 and second tube 13 into the predetermined position. The front end of the first tube 12 usually has a smaller diameter to facilitate smooth insertion into the ureter 01 through the ureteroscope or catheter, reducing damage to the ureter wall.

[0063] The deformation wire 11 serves as the middle section of the occlusion body 1 and is the core part of the occlusion device 100. It is made of a shape memory alloy and can automatically deform when heated to form an occlusion structure 101. The shape memory property of the deformation wire 11 allows it to maintain a straight shape at low temperatures, facilitating insertion into the ureter 01, and automatically expand at body temperature or other preset temperatures to form an effective occlusion structure.

[0064] The second tube 13 serves as the lower section of the occlusion body 1 and serves as a connection to external equipment and control of the occlusion body 1. It is usually connected to the ureteroscope or other surgical instruments, providing an interface for the doctor to operate. The design and size of the second tube 13 allow it to stably connect to external equipment and provide necessary support and control functions during surgery. Through the second tube 13, the doctor can accurately control the insertion depth and position of the occlusion device 100, ensuring that the occlusion structure 101 can accurately expand at the predetermined position.

[0065] This segmented design not only improves the flexibility and adaptability of the occlusion device 100, but also enhances the operational convenience and reliability during surgery. Through the sequential connection of the first tube 12, deformation wire 11 and second tube 13, the occlusion device 100 can better adapt to the anatomical structure of different patients' ureters, while ensuring the safety and effectiveness of the surgery.

[0066] In some embodiments, the elastic winding wire 2 is wound around the first tube 12 and the second tube 13.

[0067] In this embodiment, the purpose of this design is to further enhance the overall structural strength and stability of the occlusion body 1, ensuring the reliability and durability of the occlusion device 100 during surgical operation.

[0068] Specifically, the elastic winding wire 2 is tightly combined with the first tube 12 and the second tube 13 through winding. This winding structure not only provides additional mechanical support, but also enhances the anti-deformation ability of the occlusion body 1 under stress. Since the first tube 12 and the second tube 13 serve as the upper section and the lower section of the occlusion body 1 respectively, they will bear different forces during surgery, including friction during insertion and tension during operation. The winding of the elastic winding wire 2 can evenly distribute these forces, preventing damage caused by local stress concentration.

[0069] In addition, the elastic property of the elastic wire 2 can also provide a certain flexibility, so that the occlusion body 1 can better adapt to the anatomical structure of the ureter 01 during operation. This flexibility helps to reduce damage to the ureter wall, while ensuring the flexibility and operational convenience of the occlusion device 100 during surgery.

[0070] In some embodiments, the first tube 12, the deformation wire 11 and the second tube 13 adopt an integrated design.

[0071] In this embodiment, the first tube 12, the deformation wire 11 and the second tube 13 adopt an integrated design, i.e. they are all made of memory alloy. This design not only ensures the consistency of the occlusion device 100 in terms of material properties, but also improves the strength and reliability of the overall structure by eliminating the connection points between different components. The integrated structure enables the occlusion body 1 to better adapt to the anatomical structure of the ureter during surgery, reducing the risk of damage that may be caused by stress concentration at the connection, thereby improving the safety and efficiency of the surgery.

[0072] Although the first tube 12, the deformation wire 11 and the second tube 13 are all made of memory alloy material, the deformation wire 11 is specially treated to have the ability to automatically deform at a specific temperature. This property enables the deformation wire 11 to deform from a straight shape to an occlusion structure 101, such as a funnel shape or other suitable shape, at body temperature or other pre-set temperature, to achieve occlusion of the stone in the ureter. The first tube 12 and the second tube 13 mainly serve the purpose of support and connection, ensuring the stability and operational convenience of the occlusion device 100 during surgery. The first tube 12, as the upper segment of the occlusion body 1, is responsible for guiding the device to be smoothly inserted into the ureter; the second tube 13, as the lower segment, connects to external equipment and provides an operating interface, so that the doctor can accurately control the insertion depth and position of the occlusion device 100.

[0073] In some embodiments, the first tube 12 has a first end and a second end, the second end of the first tube 12 is connected to the deformation wire 11, and the tube diameter of the first tube 12 increases from the first end to the second end; the second tube 13 has a first end and a second end, the first end of the second tube 13 is connected to the deformation wire 11, and the tube diameter of the second tube 13 remains unchanged from the first end to the second end.

[0074] In this embodiment, the design of the first tube 12 and the second tube 13 has unique structural features to meet the different needs of the occlusion device 100 in the operation. Specifically, the first tube 12 has a first end and a second end, and the tube diameter gradually increases from the first end to the second end. This variable diameter design makes the front end of the first tube 12 have a smaller diameter, which facilitates the smooth entry of the device into the ureter 01, reduces friction and damage to the ureter wall. With the gradual increase of the tube diameter, the second end of the first tube 12 is connected with the deformation wire 11, which not only provides sufficient support force, but also ensures that the deformation wire 11 can smoothly unfold when heated to form an effective occlusion structure 101.

[0075] At the same time, the second tube 13 also has a first end and a second end, and the tube diameter remains unchanged from the first end to the second end. This constant diameter design makes the second tube 13 have high structural strength and stability, which can withstand various forces that may occur during the operation, including friction during insertion and tension during operation. The first end of the second tube 13 is connected with the deformation wire 11, which not only ensures the integrity of the occlusion device 100, but also enables the second tube 13 to effectively transmit the operation instructions of external equipment, ensuring accurate control of the occlusion device 100 during the operation.

[0076] The cleverness of this design is that the first tube 12 of the upper segment adopts a variable diameter structure to facilitate the smooth entry of the device into the ureter 01, while the second tube 13 of the lower segment adopts a constant diameter structure to ensure the strength and stability of the device during the operation. Through this segmented design, the occlusion device 100 not only better adapts to the anatomical structure of the ureter 01, but also provides reliable support and control during the operation, thereby improving the safety and efficiency of the operation. This structural design not only optimizes the performance of the occlusion device 100, but also provides greater convenience and reliability for the operation.

[0077] In some embodiments, the occlusion body 1 is made of nickel-titanium memory alloy.

[0078] In this embodiment, the nickel-titanium memory alloy is a material with unique shape memory properties, which can automatically recover to a preset shape under certain temperature conditions. The selection of this material provides a key functional basis for the occlusion device 100, enabling it to achieve effective occlusion function during the operation.

[0079] Specifically, the shape memory effect of the nickel-titanium memory alloy enables the deformation wire 11 to automatically deform when heated to form the occlusion structure 101. This property not only simplifies the operation process of the occlusion device 100, but also improves the safety and efficiency of the operation. The automatic deformation capability of the nickel-titanium memory alloy reduces the dependence on manual operation and reduces the risk of damage to the ureter wall due to improper operation.

[0080] In addition, the nickel-titanium memory alloy also has good biocompatibility and durability. This material is widely used in the medical field, which can ensure the safety and reliability of the occlusion device 100 in the human body. The high strength and super-elasticity of the nickel-titanium memory alloy enable the occlusion body 1 to withstand certain pressure and tension during the operation, ensuring the stability and effectiveness of the occlusion structure 101.

[0081] The occlusion body 1 made of nickel-titanium memory alloy not only has shape memory effect, but also provides strong guarantee for the overall performance of the occlusion device 100 through the biocompatibility and mechanical properties of the material. The choice of this material makes the occlusion device 100 better adapt to the operation requirements, ensures the safety and effectiveness of the operation, and provides a more reliable treatment plan for the patient.

[0082] In some embodiments, the occlusion device 100 also includes an elastic film, which covers the deformation wire 11.

[0083] In this embodiment, the introduction of the elastic film provides additional functional characteristics for the occlusion device 100, especially before and after the deformation of the deformation wire 11, the elastic film can maintain a stable state, ensuring the reliability of the occlusion structure 101 during formation and use.

[0084] Specifically, the elastic properties of the elastic film enable it to closely fit the surface of the deformation wire 11 during the deformation of the deformation wire 11 from a straight shape to the occlusion structure 101. This close fit not only ensures the integrity of the occlusion structure 101, but also provides a layer of protection for the surface of the occlusion structure 101. This protective surface can effectively reduce the friction between the occlusion structure 101 and the ureter wall, reduce the risk of damage to the ureter wall, and also help the occlusion structure 101 better adapt to the anatomical structure of the ureter.

[0085] In addition, the elastic film can further provide hydrophilic surface properties. The hydrophilic surface can spread the liquid (such as body fluid, physiological saline) on the surface of the occlusion structure 101, further reducing the friction between the occlusion structure 101 and the ureter wall, and also enhancing the biocompatibility of the occlusion structure 101. This hydrophilic property not only helps the smooth operation of the occlusion device 100 during the operation, but also reduces the discomfort of the patient caused by foreign body sensation.

[0086] Through the protection and hydrophilic properties of the elastic film, the occlusion device 100 can more safely and effectively achieve the occlusion function during the operation process. The introduction of the elastic film not only improves the reliability of the occlusion device 100, but also enhances the operation convenience and patient comfort during the operation process. This design enables the occlusion device 100 to achieve effective occlusion while minimizing damage to the ureter wall, improving the safety and efficiency of the operation.

[0087] As shown in Figure 3 , the stone 02 in the ureter 01 is often located in the narrow area of the ureter 01.

[0088] As shown in Figure 4 , in clinical practice, a laser fiber loaded by an endoscope probe 05 is often used for lithotripsy, and physiological saline is continuously introduced to impact the stones, and the stones may be impacted into the kidney 03 with the water flow.

[0089] As shown in Figure 5 , to solve the problem that the stones may be impacted into the kidney 03 with the water flow, the present application provides an occlusion device 100, which performs occlusion in advance above the stone 02 before laser lithotripsy, to ensure that smaller stones do not flow into the kidney 03.

[0090] For example, in a normal temperature state, the occlusion device 100 in a Figure 1 state is placed above the stone 02 under ultrasonic guidance; before lithotripsy, hot water at 45±5℃ is injected first, 40℃ is the temperature at which the shape memory alloy begins to deform, and 50℃ is the temperature after deformation is completed, after about 2mL of hot water is introduced, the occlusion device 100 will complete the deformation within 2s to form a dense occlusion structure 101, avoiding the upward entry of the stone 02 into the deep calyx. After lithotripsy is completed, if it is to be removed, cold water at about 5℃ can be introduced, which will make the compression force after deformation smaller, and it can be taken out of the body under the pulling of a foreign body forceps. Figure 2

[0091] It should be noted that many components mentioned in the present application are general standard components or components known to those skilled in the art, the structure and principle of which can be known by the skilled person through a technical manual or through a conventional experimental method.

[0092] It should be noted that in the present specification, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between the entities.

[0093] ​The sealing device provided by the application is described in detail above. The principles and implementation manners of the application are described by applying specific examples in the present document, and the above description of the examples is only used to help understand the method of the application and its core idea. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A sealing device, characterized in that, It includes a blocking body for extending along the ureter, the blocking body having a deformable wire made of shape memory alloy, the deformable wire being able to deform into a blocking structure when heated, thereby blocking the stone in the ureter on the side deviating towards the kidney.

2. The sealing device according to claim 1, characterized in that, The deformable wire is straight before heating, and the sealing structure is funnel-shaped after heating.

3. The sealing device according to claim 2, characterized in that, The funnel shape has a first end and a second end, the diameter of the first end is smaller than the diameter of the second end, the first end faces the kidney, and the second end faces the stone.

4. The sealing device according to claim 1, characterized in that, It also includes an elastic winding wire, which is wound around the sealing body.

5. The sealing device according to claim 4, characterized in that, The sealing body includes a first pipe fitting and a second pipe fitting; The first pipe fitting, the deformable wire, and the second pipe fitting are connected in sequence.

6. The sealing device according to claim 5, characterized in that, The elastic wire is wound around the first pipe fitting and the second pipe fitting.

7. The sealing device according to claim 5, characterized in that, The first pipe fitting, the deformable wire, and the second pipe fitting are designed as a single piece.

8. The sealing device according to claim 5, characterized in that, The first pipe fitting has a first end and a second end, the second end of the first pipe fitting is connected to the deformable wire, and the pipe diameter of the first pipe fitting increases from the first end to the second end; The second pipe fitting has a first end and a second end. The first end of the second pipe fitting is connected to the deformable wire. The pipe diameter of the second pipe fitting remains unchanged from the first end to the second end.

9. The sealing device according to claim 7, characterized in that, The sealing body is made of nickel-titanium shape memory alloy.

10. The sealing device according to claim 1, characterized in that, It also includes an elastic membrane that covers the deformable filament.

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