Ureteral lithotripsy catheter

Abstract

Provided is a ureteral lithotripsy catheter, comprising a sheath (1). One end of the sheath (1) is fixedly connected to a vortex cavity (3), and the other end of the sheath (1) is connected to a bending section (9). The sheath (1) is provided with a pressure detection hole (8) and a pressure detection channel (10). The pressure detection hole (8) is in communication with the pressure detection channel (10). The other end of the pressure detection channel (10) is connected to a detachable pressure sensor. By means of arranging the detachable pressure sensor, the sensor body can be detached when not in use, facilitating storage. During use, the connection between the sensor body and the sensor chip is convenient, rapid, and reliable. The pressure sensor can monitor accurate and reliable data by means of the pressure detection channel, avoid high pressure in the minimally invasive cavity, and significantly improve the safety rate of surgery and the calculus removal efficiency.

Description

A ureteral stone removal catheter Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a ureteral stone removal catheter. Background Technology

[0002] Ureteral guiding sheaths are mainly used clinically to establish a surgical channel for ureteral stricture, adhesions, obstruction, blockage, and stones requiring related surgical treatment. Endoscopes, laser fibers, stone retrieval instruments, or operating cables are introduced through this channel. Patent CN110215262B discloses a flexible suction sheath, comprising an outer sheath and a dilator catheter. The dilator catheter is inserted into the outer sheath and extends from an opening at the insertion end of the outer sheath. The insertion end of the outer sheath has a flexible sheath head, and the non-insertion end has an outer sheath connector with a bending control button, a sealing component, and a water outlet. This patent, by making the head of the outer sheath flexible, allows for flexible control of the suction sheath's advance direction during insertion, using the bending control button at the outer sheath connector to prevent the sheath from colliding with the patient's organs and reduce harm. However, the pressure cannot be monitored continuously during operation, posing a certain risk. Therefore, a ureteral stone removal catheter is needed to solve the above-mentioned technical problems. Technical issues

[0003] To address the aforementioned deficiencies in existing technologies, this utility model provides a ureteral lithotripsy catheter, comprising a sheath. One end of the sheath is fixedly connected to a vortex cavity, and the other end is connected to a bend that can bend 270 degrees, allowing for smooth entry into the surgical bend. The sheath is designed to be narrower at the front and wider at the back. A contrast line is provided on the sheath, and a contrast ring is provided at the end of the sheath furthest from the vortex cavity. During surgery, if the endoscope needs to be withdrawn due to a large stone, it can be withdrawn to the diameter change point, reducing the need for withdrawal. The sheath is provided with pressure detection holes and a pressure detection channel, with the pressure detection holes communicating with the pressure detection channel. A detachable pressure sensor is connected to the other end of the pressure detection channel. Four pressure monitoring holes are provided, extending from the inside to the outside of the sheath, preventing blockage of the catheter by intraluminal tissue and stone fragments, and enabling accurate and reliable data monitoring. Technical solutions

[0004] Preferably, the pressure sensor includes a sensor chip and a sensor body. A pressure detection connector one is provided on the vortex cavity, and a pressure detection connector two is fitted onto the pressure detection connector one. The sensor chip is fixed inside the pressure detection connector one, and the sensor chip is connected to a connecting piece one via a wire one. The connecting piece one is also connected to a compression spring, one end of which is fixedly connected to the inner wall of the pressure detection connector one. The end of the connecting piece one away from the compression spring is fitted with a connecting piece two, which is disposed on the pressure detection connector two. The connecting piece two is connected to the sensor body via a wire two. The pressure detection connector one has a slot, and the pressure detection connector two has a locking block that mates with the slot. The locking block enters the slot from the inlet. Rotating the pressure detection connector two locks the locking block in the slot, preventing it from falling out. After the connecting piece one contacts the connecting piece two, it transmits the data received by the sensor chip to the sensor body. This design facilitates the disassembly and installation of the pressure sensor body and makes it easy to store. Connecting piece one and connecting piece two can adopt a core-insertion structure, which is existing technology. Its specific structure and principle will not be described in detail. When the core-insertion structure is adopted, the connecting piece two is rotatably connected to the inner wall of the pressure detection connector two through a bearing, which does not affect the rotation and fixation when the pressure detection connector one and the pressure detection connector two are snapped together.

[0005] Preferably, the inner wall of the pressure testing connector one is provided with a sliding groove, and a guide block is slidably disposed in the sliding groove. The guide block is fixedly connected to the connecting piece one. This makes the movement of the connecting piece one more stable and ensures the reliability of the contact between the connecting piece one and the connecting piece two.

[0006] Preferably, the bottom of the vortex cavity is provided with a suction connector, and a rear cover is provided on the side of the vortex cavity away from the sheath. The rear cover is provided with a endoscopic inlet, which cooperates with the dilator and the endoscope. The dilator or endoscope extends into the sheath through the endoscopic inlet. A handle is provided on the outer wall of the vortex cavity. The rear cover and the vortex cavity are connected by a hook structure, and the handle and the vortex cavity are integrated to prevent detachment. The handle is located at the bottom of the vortex cavity for easy clamping during operation, enabling one-handed operation, greatly reducing a series of risks caused by unstable operation, and effectively shortening the catheter placement surgery time.

[0007] Working principle: Four circular pressure monitoring holes are located at the end of the pressure sensing channel, extending from the inside to the outside of the sheath. This prevents blockage of the tube by intracavitary tissue and stone fragments, and provides accurate and reliable data. The sensor uses a liquid pressure measurement principle to measure pressure and irrigation flow rate of the endoscopic system. Compared to existing technologies, this method is practical and easy to implement, resolving the contradiction between insufficient irrigation flow and high intracavitary pressure in minimally invasive intracavitary stone retrieval, significantly improving surgical safety and stone retrieval efficiency.

[0008] This utility model also includes other components that enable the normal use of a ureteral stone removal catheter, such as a medical irrigation and suction platform (application number CN201410041761.1) used in conjunction with it, and a control component for a pressure sensor, all of which are conventional technologies in the field. Furthermore, devices or components not limited in this utility model, such as sensor chips, sensor bodies, connecting pieces one and two, wires, and bending parts, all employ conventional technologies and equipment in the field. Beneficial effects

[0009] The beneficial effects of this utility model are: reasonable structure, equipped with a detachable pressure sensor, which can be removed for easy storage when not in use, and the connection between the sensor body and the sensor chip is convenient, quick and reliable when in use; the pressure sensor can monitor accurate and reliable data through the pressure detection channel, avoiding high pressure in the minimally invasive cavity, and significantly improving the safety rate and stone removal efficiency of the operation. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 is a schematic diagram of the structure of a ureteral stone removal catheter according to an embodiment of the present invention;

[0012] Figure 2 is a structural schematic diagram of pressure detection connector one and pressure detection connector two in Figure 1;

[0013] Figure 3 is a right view of pressure testing connector one in Figure 2;

[0014] Figure 4 is a schematic diagram of the structure after pressure testing connector 1 and pressure testing connector 2 in Figure 2 are connected.

[0015] In the diagram: 1. Sheath; 2. Rear cover; 3. Swirl chamber; 4. Handle; 5. Pressure detection connector one; 6. Suction connector; 7. Expansion tube; 8. Pressure monitoring port; 9. Bend; 10. Pressure detection channel; 11. Endoscope inlet; 12. Sensor chip; 13. Wire two; 14. Sensor body; 15. Pressure detection connector two; 16. Connecting piece one; 17. Guide block; 18. Wire one; 19. Compression spring; 20. Slot; 21. Inlet; 22. Connecting piece two; 23. Locking block; 24. Slide. The best embodiment of the present invention Detailed Implementation

[0016] The present invention will now be clearly described in conjunction with the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0017] As shown in Figures 1-4, this utility model provides a ureteral lithotripsy catheter, including a sheath 1. One end of the sheath 1 is fixedly connected to a vortex cavity 3, and the other end of the sheath 1 is connected to a bending part 9. The bending part 9 can be bent 270 degrees and can be smoothly inserted into the surgical bending part 9 position. The sheath 1 is designed to be thinner at the front and thicker at the back. The sheath 1 is provided with a radiopaque line. The sheath is transparent and designed with radiopaque lines, scale lines and radiopaque rings to facilitate the doctor's real-time understanding of the operation status during surgery.

[0018] The end of the sheath 1 furthest from the vortex cavity 3 is provided with a contrast ring. During the operation, if the stone is too large and the endoscope needs to be withdrawn, the endoscope can be withdrawn to the diameter change position, reducing the withdrawal operation. The sheath 1 is provided with a pressure detection hole and a pressure detection channel 10. The pressure detection hole and the pressure detection channel 10 are connected. The other end of the pressure detection channel 10 is connected to a detachable pressure sensor. Four pressure monitoring holes 8 are provided. The pressure monitoring holes 8 extend from the inside to the outside of the sheath 1 to avoid the cavity tissue and stone fragments from blocking the tube and to monitor accurate and reliable data.

[0019] The pressure sensor includes a sensor chip 12 and a sensor body 14. A pressure detection connector 5 is provided on the vortex cavity 3, and a second pressure detection connector 15 is fitted onto the first pressure detection connector 5. The sensor chip 12 is fixed inside the first pressure detection connector 5. The sensor chip 12 is connected to a connecting piece 16 via a wire 18. The connecting piece 16 is also connected to a compression spring 19. One end of the compression spring 19 is fixedly connected to the inner wall of the first pressure detection connector 5. The end of the connecting piece 16 away from the compression spring 19 is fitted with the second connecting piece 2. 2. The second connecting piece 22 is disposed on the second pressure detection connector 15. The second connecting piece 22 is connected to the sensor body 14 via the second wire 13. The first pressure detection connector 5 is provided with a slot 20. The second pressure detection connector 15 is provided with a locking block 23 that cooperates with the slot 20. The locking block 23 enters the slot 20 from the inlet 21. Rotating the second pressure detection connector 15 locks the locking block 23 in the slot 20 to prevent it from falling off. After the first connecting piece 16 contacts the second connecting piece 22, it transmits the data received by the sensor chip 12 to the sensor body 14. This arrangement facilitates the disassembly and installation of the pressure sensor body 14 and makes it easy to store. The first connecting piece 16 and the second connecting piece 22 can adopt a ferrule-type design, which is existing technology, and its specific structure and principle will not be described in detail. When using a ferrule structure, the second connecting piece is rotatably connected to the inner wall of the second pressure detection connector via a bearing, which does not affect the rotational fixation when the first pressure detection connector and the second pressure detection connector are engaged.

[0020] The inner wall of the pressure testing connector 5 is provided with a groove 24, and a guide block 17 is slidably disposed in the groove 24. The guide block 17 is fixedly connected to the connecting piece 16. This makes the movement of the connecting piece 16 more stable and ensures the reliability of the contact between the connecting piece 16 and the connecting piece 22.

[0021] The bottom of the vortex chamber 3 is equipped with a suction connector 6, which can be connected to a suction tube to aspirate the liquid inside the chamber. A rear cover 2 is located on the side of the vortex chamber 3 away from the sheath 1. The rear cover 2 has a endoscopic inlet 11, which cooperates with the dilation tube 7 and the endoscope. The dilation tube 7 or the endoscope extends into the sheath 1 through the endoscopic inlet 11. A handle 4 is located on the outer wall of the vortex chamber 3. The rear cover 2 and the vortex chamber 3 are connected by a hook-type structure, and the handle 4 and the vortex chamber 3 are integrated to prevent detachment. The handle 4 is located below the vortex chamber 3 for easy clamping during operation, enabling single-handed operation, greatly reducing the risks caused by unstable operation, and effectively shortening the catheter placement surgery time. After the endoscope is inserted into the sheath, the bending part can be controlled by bending the endoscope to smoothly reach the surgical site, preventing difficulties in sheath insertion due to bending of the surgical channel.

[0022] When in operation, it is used in conjunction with the medical irrigation and aspiration platform of application number: CN201410041761.1. During use, the platform controls the peristaltic pump to infuse liquid into the lumen through the "liquid irrigation tube - endoscope system - a ureteral stone removal catheter". The pressure sensor measures the liquid pressure in the lumen in real time and converts the pressure into an electrical signal to feed back to the platform. The platform controls the internal negative pressure pump to work in real time and intelligently based on the measured pressure in the lumen, so as to form a negative pressure in the stone collection bottle and collection container. The waste liquid in the lumen, along with the fragmented stones, is attracted out by the negative pressure, thereby achieving the purpose of automatically adjusting the pressure in the lumen. Specifically, the dilator is inserted into the sheath 1 for pre-dilation before surgery. The dilator is then withdrawn, and an endoscope is inserted through the rear cover. Liquid is infused into the surgical site through the endoscope's irrigation channel, and the liquid is aspirated from the surgical site through the suction connector to achieve fluid circulation. During this process, four circular pressure monitoring holes 8 are provided at the end of the pressure sensing channel. The pressure monitoring holes 8 extend from the inside to the outside of the sheath 1, preventing intracavitary tissue and stone fragments from blocking the tube and enabling accurate and reliable data monitoring. The sensor uses the principle of liquid pressure measurement to measure pressure and the irrigation flow of the endoscope system, which solves the contradiction between insufficient irrigation flow and high intracavitary pressure in minimally invasive intracavitary stone retrieval, significantly improving the safety rate and stone retrieval efficiency of the surgery.

[0023] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ureteral stone-clearing catheter comprising a sheath tube, one end of the sheath tube being fixedly connected with a vortex cavity, the other end of the sheath tube being connected with a bending part, characterized in that: The sheath is provided with a pressure detection hole and a pressure detection channel, the pressure detection hole is communicated with the pressure detection channel, and the other end of the pressure detection channel is connected with a detachable pressure sensor.

2. The ureteral lithotripsy catheter of claim 1, wherein: The pressure sensor comprises a sensor chip and a sensor body, the backflow cavity is provided with a pressure detection connector one, the pressure detection connector one is matched with a pressure detection connector two, the sensor chip is fixed in the pressure detection connector one, the sensor chip is connected with a connecting sheet one through a wire one, the connecting sheet one is further connected with a compression spring, one end of the compression spring is fixedly connected with the inner wall of the pressure detection connector one, the connecting sheet one is matched with a connecting sheet two away from the compression spring, the connecting sheet two is arranged on the pressure detection connector two, the connecting sheet two is connected with the sensor body through a wire two, the pressure detection connector one is provided with a clamping groove, the pressure detection connector two is provided with a clamping block matched with the clamping groove, and the connecting sheet one and the connecting sheet two contact to transmit the data received by the sensor chip to the sensor body.

3. The ureteral lithotripsy catheter of claim 2, wherein: The inner wall of the pressure detection connector one is provided with a sliding groove, a guide block is slidingly arranged in the sliding groove, and the guide block is fixedly connected with the connecting sheet one.

4. The ureteral lithotripsy catheter of claim 1, wherein: The bottom of the backflow cavity is provided with a suction connector, the side of the backflow cavity away from the sheath is provided with a rear cover, the rear cover is provided with a speculum inlet, the speculum inlet is matched with the expansion tube and the speculum, the expansion tube or the speculum extends into the sheath from the speculum inlet, and the outer wall of the backflow cavity is provided with a handle.

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