Ureteral stent unblocking device

Abstract

The invention discloses a blockage dredging device for a ureteral stent. The blockage dredging device is used for being inserted into the ureteral stent to achieve the blockage dredging effect. The invention belongs to the field of medical auxiliary instruments. Comprising a catheter which comprises a catheter wall and a catheter cavity defined by the catheter wall; the ultrasonic guide wire is provided with an output piece; the connecting piece is fixedly arranged at the end part of the conduit; the host is connected with the connecting piece; the detection head is fixedly arranged at the end, inserted into the human ureter, of the catheter; the suction assembly is used for sucking obstructions in the ureter; wherein a diaphragm is arranged in the tube cavity, so that a suction cavity is formed in the tube cavity; the ultrasonic guide wire is arranged in the tube cavity in a penetrating manner; the output part is used for generating high-frequency oscillation to emit ultrasonic waves to break the blockages; an ultrasonic transduction unit connected with the ultrasonic guide wire is arranged in the connecting piece; the detection head is electrically connected with the host so as to transmit an electric signal into the host. The device has the beneficial effects that the blockage condition in the ureteral stent is detected through the ultrasonic detection function, and blockage dredging is conducted through the ultrasonic principle.

Description

Technical Field

[0001] The present application relates to the field of medical auxiliary equipment, and in particular, to a ureteral stent unblocking device. Background Art

[0002] Ureteral stents are the most commonly used tools in the treatment of various benign and malignant urinary system diseases. Their functions include internal support and internal drainage. They can effectively relieve temporary upper urinary tract obstruction caused by upper urinary tract stones and ureteral edema, prevent postoperative ureteral stenosis and urine leakage, and facilitate the recovery of kidney function on the affected side. Ureteral stents are routinely left in the patient's body for a certain period of time. However, the use of ureteral stents is often accompanied by some complications. During the retention period, the ureteral stent will cross-link with various hydrophilic or lipophilic groups contained in body fluids and urine to form clumps, such as crust formation, which leads to poor drainage and blockage;

[0003] The current clinical method of clearing blockage is generally to insert a metal guide wire into the ureteral stent to clear the blockage. However, this method cannot observe the blockage during the clearing process and cannot control the force of the clearing process. Therefore, it is easy to cause the ureteral stent to be damaged. In severe cases, the ureteral stent needs to be replaced, which increases the burden on patients.

[0004] Therefore, it is necessary to design a ureteral stent unblocking device that can detect the internal blockage of the ureteral stent and can clear the blockage without causing damage to the ureteral stent. Summary of the invention

[0005] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0006] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a ureteral stent blockage clearing device, which is used to be inserted into a ureteral stent to clear the blockage, comprising:

[0007] A catheter, comprising a tube wall and a tube lumen defined by the tube wall;

[0008] An ultrasonic guidewire having an output member;

[0009] A connecting piece, fixedly arranged at the end of the conduit;

[0010] A host computer connected with the connecting piece;

[0011] The detection head is fixedly arranged at the end of the catheter inserted into the human ureter;

[0012] A suction component, used to suck out obstructions in the ureter;

[0013] Among them, a diaphragm is arranged in the lumen to form a suction cavity in the lumen; an ultrasonic guide wire is inserted into the lumen; the output part is used to generate high-frequency oscillation to emit ultrasonic waves to break up the blockage; an ultrasonic transducer unit connected to the ultrasonic guide wire is arranged in the connecting part; the detection head is electrically connected to the host to transmit the electrical signal to the host;

[0014] When clearing the blockage, the catheter is inserted into the ureteral stent, and the detection head can convert the detected blockage situation in the ureteral stent into an electrical signal and send it to the host; the host can receive and analyze the electrical signal; then the output part generates ultrasonic oscillation to clear the blockage; at this time, the detection head can detect the state of the blockage in real time, and promptly absorb the shattered blockage through the absorption component; in this way, the blockage situation of the blockage is automatically detected and cleared by ultrasound, and the blockage can be absorbed in time after being shattered, thereby improving the cleaning ability.

[0015] In some embodiments, the detection head is an ultrasonic probe;

[0016] The detection head is electrically connected to the signal amplifier through the ultrasonic guide wire, and the signal amplifier is used to receive and amplify the signal transmitted by the detection head;

[0017] The signal amplifier is electrically connected to the host to transmit the signal to the host.

[0018] In some embodiments, the connector includes a piston chamber in communication with the suction chamber and a conversion chamber in communication with the tubular chamber;

[0019] The piston chamber and the suction chamber are connected through a connecting pipe; a first one-way valve is installed on the connecting pipe, and the first one-way valve allows the medium in the suction chamber to enter the piston chamber; a suction port is arranged at the bottom of the suction chamber, and a first one-way valve is arranged on the suction port;

[0020] The ultrasonic guide wire penetrates into the conversion cavity and connects to the ultrasonic transducer unit located in the conversion cavity to convert the electrical power into mechanical power, and the ultrasonic transducer unit induces the output member to vibrate;

[0021] The ultrasonic transducer unit is connected to the host through a signal transmission module.

[0022] In some embodiments, the aspiration assembly comprises:

[0023] A piston block is movably disposed in the piston chamber;

[0024] A first electromagnet is disposed on the piston block;

[0025] A magnetic member, disposed on a surface of the piston chamber opposite to the first electromagnet;

[0026] A first elastic member, connecting the first electromagnet and the magnetic member;

[0027] Among them, the side wall of the piston cavity penetrates to the outside to form a discharge port; a second one-way valve is arranged at the groove of the discharge port, and the second one-way valve only allows the medium in the piston cavity to flow through the discharge port; an external storage box is also arranged at the discharge port; the first electromagnet is electrically connected to the central processing module, and the central processing module controls the power on / off of the first electromagnet and the first electromagnet can generate a magnetic attraction with the magnetic part after being energized; the first elastic part always gives the piston block an elastic force away from the magnetic part.

[0028] In some embodiments, the piston chamber is provided with a guide groove for guiding the movement of the piston block;

[0029] A guide rod corresponding to the guide groove is arranged on the piston block;

[0030] The inner wall of the guide groove forms a tapered portion;

[0031] A buffer rod is arranged on the side wall of the guide rod;

[0032] Wherein, a second elastic member is arranged between the buffer rod and the guide rod, and the second elastic member always gives the buffer rod elasticity close to the surface of the tapered portion.

[0033] In some embodiments, a magnetic attraction member is provided at the end of the buffer rod away from the surface of the tapered portion;

[0034] A second electromagnet is also arranged in the guide rod and is arranged opposite to the magnetic attraction member;

[0035] Wherein, the second electromagnet is electrically connected to the central processing module.

[0036] In some embodiments, a pulley is disposed at the end of the buffer rod.

[0037] In some embodiments, a water injection port is also provided in the lumen;

[0038] The water injection port is connected to an external water pump through a water pipe;

[0039] The diaphragm is located between the detection head and the suction port to provide a drainage port;

[0040] A second one-way valve is arranged on the drain outlet.

[0041] In some embodiments, the water pump is electrically coupled to the host.

[0042] The beneficial effect of the present application is that it provides a device for detecting the internal blockage of a ureteral stent through an ultrasonic detection function and clearing the blockage through the ultrasonic principle. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0044] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0045] In the attached picture:

[0046] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0047] Figure 2 It is a structural schematic diagram of a part of the embodiment, mainly showing the disassembly and assembly structure diagram of the conduit and the connector;

[0048] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing a half-section schematic diagram of a catheter;

[0049] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the installation position diagram of the suction port and the drain port;

[0050] Figure 5 It is a structural schematic diagram of a part of the embodiment, mainly showing a half-section schematic diagram of a connecting member;

[0051] Figure 6 yes Figure 5 A magnified view of part A;

[0052] Figure 7 It is the structural diagram of the limit block and the conflict block;

[0053] Figure 8 yes Figure 7 Enlarged view of part B.

[0054] Reference numerals:

[0055] 1. catheter; 2. ultrasonic guidewire; 3. connector; 4. host; 6. lumen; 7. piston chamber; 8. conversion chamber; 9. diaphragm; 10. suction chamber; 11. connecting tube; 12. first one-way valve; 13. suction port; 14. first one-way valve; 15. piston block; 16. first electromagnet; 17. magnetic part; 18. first elastic part; 19. discharge port; 20. second one-way valve; 21. storage box; 22. guide Groove; 23, guide rod; 24, tapered portion; 25, buffer rod; 26, second elastic member; 27, second electromagnet; 28, magnetic member; 29, water inlet; 30, drain outlet; 31, second one-way valve; 32, limit column; 33, third elastic member; 34, third electromagnet; 35, sliding groove; 36, resistance block; 37, first limit block; 38, second limit block; 39, permanent magnet block; 40, third elastic member. DETAILED DESCRIPTION

[0056] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0057] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0058] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0059] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0060] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0061] Embodiment 1

[0062] Reference Figures 1 to 8A ureteral stent unblocking device, used for inserting into a ureteral stent to clear the blockage in the ureteral stent; wherein, the device comprises: a catheter 1, an ultrasonic guidewire 2, a connector 3, a host 4, a probe, and a suction assembly; specifically, the catheter 1 comprises a tube wall and a tube cavity 6 defined by the tube wall; the catheter 1 is made of PP material and metal material, has a corresponding hardness and can be inserted into the ureteral stent; the diameter of the catheter 1 is always smaller than the inner diameter of the ureteral stent so that the ureteral stent can have enough space for the catheter 1 to be inserted / pulled out; the ultrasonic guidewire is arranged at An output member is fixedly arranged in the lumen 6 and at the end of the ultrasonic guidewire located in the lumen 6, and the output member is a horn; a connecting member 3 is fixedly arranged at the end of the catheter 1, and the fixing method is a threaded connection for easy disassembly and installation; more specifically, the connecting member 3 is connected to the main unit 4 through a wire; an ultrasonic transducer unit connected to the ultrasonic guidewire 2 is arranged in the connecting member 3; the ultrasonic transducer unit converts the electrical power output by the main unit 4 into mechanical power and then transmits it out, and transmits the mechanical power to the output member through the ultrasonic guidewire so that the output member generates high-frequency oscillation to break the blockage to achieve unblocking;

[0063] More preferably, the end of the catheter 1 inserted into the human ureteral stent is provided with a detection head for detecting the specific position of the blockage; wherein, the detection head is an ultrasonic probe that can be directly purchased on the market, and can emit ultrasonic waves to detect the specific position or size of the blockage; the detection head is electrically connected to the host 4, and can transmit the detected signal to the signal amplifier through the ultrasonic guide wire 2, and amplify the detected signal through the signal amplifier and then display it on the host 4 for easy observation of the state of the blockage; the above-mentioned vibration generated by the ultrasonic guide wire is a disclosed technology, and this application only applies to this technology, and does not involve the improvement of this technology, so this application does not make a detailed description of the principle.

[0064] In another specific embodiment, the connecting member 3 includes a piston cavity 7 and a conversion cavity 8; wherein a diaphragm 9 is arranged in the lumen 6 so that the internal space of the lumen 6 forms a suction cavity 10; the catheter 1 is provided with a connecting tube 11 connected to the piston cavity 7 at the end of the suction cavity 10; a first one-way valve 12 is arranged on the connecting tube 11; the first one-way valve 12 can always allow the obstruction to enter the piston cavity 7 from the suction cavity 10; the catheter 1 is located at the bottom of the suction cavity 10 to form a suction port 13 connecting the ureteral stent and the suction cavity 10; a first one-way valve 14 is arranged on the suction port 13; the first one-way valve 14 can allow the obstruction to enter the suction cavity 10 to prevent the obstruction from flowing back into the infusion tube stent;

[0065] Specifically, a suction assembly is arranged in the connecting member 3, and the suction assembly can make the suction chamber 10 generate negative pressure / positive pressure to absorb the shattered blockage into the suction chamber 10; the suction assembly includes: a piston block 15, a first electromagnet 16, a magnetic member 17, and a first elastic member 18; wherein the piston block 15 is slidably arranged in the piston chamber 7 and reciprocates along a path close to / away from the connecting tube 11; more specifically, a first electromagnet 16 is arranged on the piston block 15, and the first electromagnet 16 can generate magnetism after being energized; the magnetic member 17 is a metal block or a magnet block with magnetic conductivity, which can attract the magnetic field generated by the first electromagnet 16 after being energized to move the piston block 15; it is arranged in the piston chamber 7 and on a surface opposite to the first electromagnet 16; the first elastic member 18 is a spring, which always gives the first electromagnet 16 and the magnetic member 17 elasticity to move away from each other;

[0066] More specifically, the host 4 has a central processing module electrically connected to the first electromagnet 16, and the central processing module can analyze the signal transmitted by the signal amplifier and start the first electromagnet 16 according to the signal; it can be understood that the detection head detects the blockage and transmits the information to the central processing module; first, the central processing module can drive the output member to vibrate to clear the blockage; at this time, the detection head monitors the shape of the blockage in real time and transmits the electrical signal to the central processing module, and the central processing module can analyze whether the blockage can be sucked out after being broken; if the number of the broken blockages is enough to enter the suction port 13, the first electromagnet 16 is repeatedly powered on and off, and the piston block 15 starts to move at this time, and can generate negative pressure on the suction chamber 10 while moving, so as to absorb the broken blockage;

[0067] In another more specific embodiment, the side wall of the piston cavity 7 penetrates to the outside to form a discharge port 19, and a second one-way valve 20 is arranged at the notch of the discharge port 19, and the second one-way valve 20 can only allow the blockage in the piston cavity 7 to flow out from the discharge port 19 through the second one-way valve 20; wherein, a storage box 21 can also be fixedly arranged at the discharge port 19, and the storage box 21 is connected to the discharge port 19 by threads for easy disassembly and installation; the storage box 21 is arranged to collect blockages; through the design of the above scheme, it is possible to detect the state of the blockage and automatically clear the blockage according to the detected state of the blockage; the convenience of clearing the blockage is improved; clearing the blockage by ultrasonic means can prevent damage to the ureteral stent during clearing the blockage.

[0068] In another specific embodiment, a guide groove 22 for guiding the piston block 15 to slide is provided in the piston chamber 7; wherein a guide rod 23 corresponding to the guide groove 22 is provided on the piston block 15; the inner wall of the guide groove 22 forms a tapered portion 24, specifically, the end with a smaller port in the tapered portion 24 is close to the connecting pipe 11; a groove is formed in the concave portion of the side wall of the guide rod 23, a buffer rod 25 is slidably provided in the groove, and a pulley is provided at the end of the buffer rod 25 close to the surface of the tapered portion 24 to reduce friction; a second elastic member 26 is provided between the buffer rod 25 and the bottom of the groove, and the second elastic member 26 is a spring and always gives the buffer rod 25 elasticity close to the surface of the tapered portion 24; when the guide rod 23 moves in the guide groove 22, the buffer rod 25 will conflict with the surface of the tapered portion 24, and the movement of the guide rod 23 will be slowed down under the action of the second elastic member 26;

[0069] More specifically, a magnetic attraction part 28 is set at the end of the buffer rod 25 away from the surface of the conical portion 24, and the magnetic attraction part 28 is a magnet; a second electromagnet 27 electrically connected to the central processing module is set at the bottom of the groove, and the second electromagnet can generate magnetism and attract the magnetic attraction part 28 after being energized; in the working state, the second electromagnet 27 is always in a energized state; it can be understood that when the blockage is unblocked, the second electromagnet 27 makes the end of the buffer rod 25 away; at this time, the buffer rod 25 will not slow down the movement of the guide rod 23; specifically, after the detection head detects that the blockage is significantly reduced or when the patient feels uncomfortable during the blockage; the central processing unit can cut off the power of the second electromagnet 27, and at this time the buffer rod 25 contacts the surface of the conical portion 24 under the action of the second elastic member 26; and then the guide rod 23 can slow down when moving, so that the absorption process can be slowed down; the design of the above scheme can adjust the intensity of the clearing according to the blockage and the patient's situation.

[0070] In another more specific embodiment, a water injection port 29 is further provided in the lumen 6, and the water injection port 29 is connected to an external water pump through a water pipe; a drain port 30 is provided above the detection head and on one side of the suction port 13; a second one-way valve 31 is provided on the drain port 30, and the second one-way valve 31 can only allow water to flow from the lumen 6 through the drain port 30 to the suction chamber 10; during suction, the detection head can detect the liquid state in the suction chamber 10, and if the liquid capacity is small and affects the suction of blockages, the central processing module can start the water pump for water injection after analysis through the detection head; such a setting can make the suction smoother; and since there is clean water during suction, the suction chamber 10 can be cleaned, the cleaning ability is improved to prevent cross infection; in addition, the injection of clean water can clear the suction chamber 10 to prevent blockage.

[0071] Embodiment 2

[0072] An adjustment component for adjusting the capacity of absorbing blockages in small batches is also provided in the connecting piece 3; the adjustment component includes: a limit column 32, a third elastic member 33, and a third electromagnet 34; wherein, the end surface portion of the guide rod 23 is concave to form a sliding groove 35, and the bottom wall portion of the guide groove 22 protrudes to the internal space of the sliding groove 35 to form a limit column 32, and the side wall of the limit column 32 forms a spacing with the inner wall of the sliding groove 35, and a limit block is provided on the side wall of the limit column 32; the inner wall surface portion of the sliding groove 35 protrudes to form a resistance block 36 that can interfere with the limit block; it can be understood that the limit block can limit the movement of the guide rod 23 after the resistance block 36 interferes with the resistance block 36; specifically, a number of limit blocks can be provided, and they are arranged in a line along the axial direction of the limit column 32, and the number of settings can be set according to the actual clinical situation. In this embodiment, the plurality of limit blocks are defined as two limit blocks, the limit block close to the connecting tube 11 is defined as the first limit block 37, and the limit block away from the connecting tube 11 is defined as the second limit block 38; more specifically, the inner wall portion of the sliding groove 35 is concave to form a sliding groove that guides the limit block to approach / move away from the limit column 32l; the third electromagnet 39 iron 34 is installed at the bottom of the slide groove, and the first limit block 37 and the second limit block 38 are both provided with a permanent magnet block 39 corresponding to the third electromagnet 34. The magnetism generated by the third electromagnet 34 after being energized can generate a magnetic field of the same polarity and repulsion with the permanent magnet; a third elastic member 33 is provided between the third electromagnet 34 and the permanent magnet, and the third elastic member 33 is a spring that can always give the first limit block 37 and the second limit block 38 a pulling force that is always away from the positioning column;

[0073] Among them, the third electromagnet 34 is electrically connected to the central processing module, and the central processing module can receive the blockage status detected by the detection head and then analyze it. If the measured number of blockages becomes smaller, the third electromagnet 34 corresponding to the second limit block 38 is energized to drive the second limit block 38 close to the positioning column; at this time, when the guide rod 23 slides, the guide rod 23 can be limited by the action of the second limit block 38; at this time, the movement of the piston block 15 becomes shorter, and the amount of blockage sucked becomes less; in this way, the number of blockages detected by the detection head can be automatically adjusted to the amount of blockage sucked, thereby preventing excessive suction from affecting the patient's comfort.

[0074] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A ureteral stent unblocking device, used for inserting into a ureteral stent to unblock; characterized in that: include: A catheter, comprising a tube wall and a tube cavity defined by the tube wall; An ultrasonic guidewire having an output member; A connecting piece, fixedly arranged at the end of the conduit; A host connected to the connecting piece; A detection head, fixedly arranged at the end of the catheter inserted into the human ureter; A suction component, used to suck out obstructions in the ureter; Among them, a diaphragm is arranged in the lumen to form a suction cavity in the lumen; the ultrasonic guidewire is passed through the lumen; the output member is used to generate high-frequency oscillations to emit ultrasonic waves to break up the blockage; an ultrasonic transducer unit connected to the ultrasonic guidewire is arranged in the connecting member; and the detection head is electrically connected to the host to transmit electrical signals to the host.

2. A ureteral stent unblocking device according to claim 1, characterized in that: The detection head is an ultrasonic probe; The detection head is electrically connected to a signal amplifier through the ultrasonic guide wire, and the signal amplifier is used to receive and amplify the signal transmitted by the detection head; The signal amplifier is electrically connected to the host to transmit the signal to the host.

3. A ureteral stent unblocking device according to claim 2, characterized in that: The connecting member includes a piston chamber communicated with the suction chamber and a conversion chamber communicated with the tube chamber; The piston chamber and the suction chamber are connected through a connecting pipe; a first one-way valve is installed on the connecting pipe, and the first one-way valve allows the medium in the suction chamber to enter the piston chamber; a suction port is arranged at the bottom of the suction chamber, and a first one-way valve is arranged on the suction port; The ultrasonic guide wire penetrates into the conversion cavity and connects to the ultrasonic transducer unit located in the conversion cavity to convert electrical power into mechanical power, and the ultrasonic transducer unit induces the output member to vibrate; The ultrasonic transducer unit is connected to the host through a signal transmission module.

4. A ureteral stent unblocking device according to claim 3, characterized in that: The suction assembly comprises: A piston block is movably disposed in the piston chamber; A first electromagnet is disposed on the piston block; A magnetic member, disposed on a surface of the piston chamber opposite to the first electromagnet; a first elastic member, connecting the first electromagnet and the magnetic member; Among them, the side wall of the piston cavity penetrates to the outside to form a discharge port; a second one-way valve is arranged at the notch of the discharge port, and the second one-way valve only allows the medium in the piston cavity to flow through the discharge port; an external storage box is also arranged at the discharge port; the first electromagnet is electrically connected to the host, and a central processing module is arranged in the host, which can receive the signal transmitted by the detection head. The central processing module controls the first electromagnet to be powered on / off, and the first electromagnet can generate a magnetic attraction with the magnetic part after being powered on; the first elastic part always gives the piston block an elastic force away from the magnetic part.

5. A ureteral stent unblocking device according to claim 4, characterized in that: The piston chamber is provided with a guide groove for guiding the movement of the piston block; A guide rod corresponding to the guide groove is arranged on the piston block; The inner wall of the guide groove forms a tapered portion; A buffer rod is arranged on the side wall of the guide rod; Wherein, a second elastic member is arranged between the buffer rod and the guide rod, and the second elastic member always gives the buffer rod elasticity close to the surface of the tapered portion.

6. A ureteral stent unblocking device according to claim 5, characterized in that: A magnetic attraction member is disposed at the end of the buffer rod away from the surface of the tapered portion; A second electromagnet is also arranged in the guide rod and is arranged opposite to the magnetic attraction member; Wherein, the second electromagnet is electrically connected to the central processing module.

7. A ureteral stent unblocking device according to claim 5, characterized in that: A pulley is arranged at the end of the buffer rod.

8. A ureteral stent unblocking device according to any one of claims 1 to 7, characterized in that: A water injection port is also arranged in the tube cavity; The water injection port is connected to an external water pump through a water pipe; The diaphragm is located between the detection head and the suction port to provide a drainage port; A second one-way valve is arranged on the drain outlet.

9. A ureteral stent unblocking device according to claim 8, characterized in that: The water pump is electrically connected to the host.

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