Stone crushing and removing mesh basket with covering film and stone crushing and removing system

Abstract

The utility model discloses a lithotripsy stone-removing mesh basket with a covering film and a lithotripsy stone-removing system, and relates to the technical field of lithotripsy treatment, the lithotripsy stone-removing mesh basket comprises a first tube and a second tube, the tail end of the second tube is provided with a mesh basket, and the surface of the end part, close to and / or far away from the second tube, of the mesh basket is covered with the covering film; a first channel is arranged in the first pipe wall, a plurality of outlets of the first channel are uniformly distributed at the tail end of the first pipe wall, and the head end of the first channel is connected with liquid pumping / injecting equipment; and / or a gap exists between the first pipe and the second pipe, at least two branches are arranged at the head end of the first pipe, and one branch is connected with liquid pumping / injecting equipment. And a second channel is arranged in the second pipe. If necessary, a balloon is arranged on the outer side of the first tube wall to assist stone removal; according to the stone breaking and removing mesh basket, liquid is injected / sucked through the first channel and the second channel, water path circulation is formed, hot liquid / hot steam and stone breaking shock waves are blocked together with the covering film, normal tissue is prevented from being damaged, and low-damage / non-damage stone breaking and stone removing are achieved.

Description

Technical Field

[0001] This utility model relates to the field of stone removal treatment technology, and in particular to a stone removal basket with a membrane and a stone removal system. Background Technology

[0002] Stones in the human body are commonly found in the gallbladder and urinary system. Clinically, two common methods for stone fragmentation are laser lithotripsy and electrohydraulic lithotripsy. However, both methods have various problems and can sometimes be counterproductive. Commonly used endoscopic lithotripsy devices utilize the internal channels of endoscopes such as fiberoptic cholangioscopy, rigid cholecystoscopy, duodenoscope, gastroscopy, cystoscope, ureteroscope, and percutaneous nephroscope. In electrohydraulic lithotripsy, the electrodes are directed through the internal channels of the endoscope, while in laser lithotripsy, the optical fibers are directed through these channels.

[0003] Holmium laser lithotripsy is the most common method for breaking up urinary stones. Its energy conversion results in heat, with a core temperature exceeding 4700℃. This heats the water that must be injected while burning the stones, creating a "boiling ureter" effect. Some of the laser pulse energy causes the injected water to vaporize instantly, directly burning the ureter or kidney tissue, leading to ureteral stenosis / occlusion and kidney failure. Stones can also drift, causing the laser pulse energy to deviate and directly penetrate tissue, resulting in serious complications.

[0004] Electrohydraulic lithotripsy (EDL) is a common treatment for gallstones and hepatobiliary stones. It was initially used for urinary stones, but was phased out due to its low efficiency. The principle of EHL is based on the high-voltage oscillation wave generated by piezoelectricity. A high voltage is generated between the positive and negative electrodes in a liquid environment. When the voltage difference exceeds the resistance of the insulation layer, sparks and shock waves are generated. These shock waves cause the water to vibrate, creating tiny bubbles that act on the stones, thus breaking them up. Its problems include low efficiency, secondary / multiple lithotripsy processes, and stone drift caused by the shock waves, which can prevent the shock wave energy from effectively reaching the stones. This necessitates the use of incision / dilation to widen the stone's passage, resulting in irreversible tissue damage. For example, the sphincter incision performed during ERCP can permanently destroy the sphincter function, leading to a series of complications; duodenal pressure exceeding bile and pancreatic duct pressure can cause repeated reflux of digestive fluids, resulting in conditions such as cholangitis and pancreatitis. Summary of the Invention

[0005] To address the shortcomings of the two aforementioned lithotripsy techniques, this invention provides a covered lithotripsy basket and lithotripsy system. The basket facilitates the fixation of the relative position between the stone and the optical fiber / electrode, preventing stone drift and improving immediate results. By forming a water circulation barrier near the basket and increasing the water circulation volume, effective cooling is achieved. Through the combined effect of the covering and the water circulation barrier, damage to normal tissues from hot liquids / steam / lithotripsy shockwaves is effectively avoided, greatly simplifying and eliminating unnecessary surgical steps. Specifically, this is achieved through the following technologies.

[0006] A stone crushing and cleaning basket with a film includes a first tube and a second tube, the second tube being sleeved inside the first tube and sliding relative to it along the axial direction, and a basket being provided at the end of the second tube, the end surface of the basket near and / or away from the second tube being covered with a film.

[0007] The first tube has a first channel inside its wall, and a plurality of outlets are provided at the end of the first channel. The plurality of outlets are evenly distributed at the end of the wall of the first tube. The head end of the first channel is connected to a liquid extraction device / liquid injection device. And / or, there is a gap between the first tube and the second tube, and the head end of the first tube has at least two branches, one of which is connected to the liquid extraction device / liquid injection device.

[0008] The second tube has a second channel inside; the head end of the second channel is connected to a liquid injection device / liquid extraction device.

[0009] It should be noted that the above-mentioned coated stone crushing and cleaning basket provided by this utility model needs to be used in conjunction with an electrode assembly (electrohydraulic lithotripsy) or an optical fiber assembly (laser lithotripsy) for stone crushing.

[0010] It should be noted that both the first and second channels can be used for both liquid extraction and injection. Therefore, the first channel can be connected to either a liquid extraction device or an injection device, while the second channel can be connected to either an injection device or a liquid extraction device.

[0011] It should be noted that the first and second tubes used in this invention can be made of non-metallic materials. The basket is composed of several wires made of metal (or other materials with the same function), which are initially bent and form a cage-like structure. The selected metal wires must have a certain degree of toughness so that they can be easily stored in the first tube and can also be easily and quickly released from the first tube to expand into a cage-like structure.

[0012] This section describes an example where the first channel is connected to an aspiration device, and the second channel is connected to an injection device. The first channel is located within the wall of the first tube, through which the aspiration device draws tissue fluid from the vicinity of the stone. After the electrode assembly or fiber optic assembly extends into the second channel, gaps remain between the second channel and the electrode assembly or fiber optic assembly. The injection device injects saline solution through the second channel, which is then injected into the vicinity of the stone from the end of the second tube through these gaps. The continuous injection of saline solution and the continuous aspiration of tissue fluid from the vicinity of the stone create a water circulation and barrier around the stone.

[0013] Alternatively, the wire can be made of nickel-titanium or stainless steel.

[0014] It should be noted that "the end surface of the basket near and / or away from the second tube is covered with a membrane" means that both ends of the basket can be covered in the axial direction parallel to the second tube, or only one end can be covered. The purpose of the membrane, besides guiding the water flow and forming a water circulation and barrier, is to also block the lithotripsy energy and high-temperature tissue fluid / vapor generated by the electrodes and fiber optic heads. Since the lithotripsy process takes place inside the basket, the entire retrieval basket needs to be removed from the patient after lithotripsy to extract the stones. If a membrane is also provided on the end surface away from the second tube, it can prevent excessive leakage of fragmented, small stones from the basket when it is retrieved after lithotripsy, thus improving stone retrieval efficiency.

[0015] Therefore, comparatively speaking, placing a membrane on both ends of the basket will result in a better stone-removing effect.

[0016] It should also be noted that "the head end of the first channel is connected to a fluid extraction / injection device; and / or, there is a gap between the first tube and the second tube, and the head end of the first tube is provided with at least two branches, one of which is connected to the fluid extraction / injection device" means that: the fluid extraction / injection device can be connected to the first channel; multiple branches can be provided at the head end of the first tube, and the fluid extraction / injection device can be connected to one of the branches; or the fluid extraction / injection device can be connected to both the first channel and the branches simultaneously. All three connection methods can achieve the function of aspirating high-temperature tissue fluid / high-temperature vapor or injecting physiological saline.

[0017] The lithotripsy basket with a membrane provided by this utility model allows for lithotripsy by inserting the first and second tubes into the stone site, manipulating the end of the second tube to extend from the end of the first tube, causing the basket to expand rapidly. The surgeon continues to manipulate the basket to capture the stone and surround it within the basket. Then, the electrode assembly or fiber optic assembly is inserted into the second channel and extends from the end of the second tube, reaching the vicinity of the stone. A gap exists between the electrode assembly or fiber optic assembly and the second channel. The aspiration and injection devices are activated, injecting saline solution through the gap, while tissue fluid is aspirated from the first channel. After a period of operation, a relatively stable water circulation is formed in the tissue fluid near the stone. Finally, the electrode assembly or fiber optic assembly is activated to complete the lithotripsy operation.

[0018] In the lithotripsy and lithotripsy basket structure provided by this utility model, the membrane not only facilitates the capture and collection of stones and fragments, but also blocks the shock waves generated by the lithotripsy from damaging the surrounding tissues. Furthermore, it collects the high-temperature vapor generated during lithotripsy by the electrode assembly or fiber optic assembly within the membrane, allowing for easy removal of the vapor. The water circulation formed by physiological saline and tissue fluid not only works synergistically with the membrane to act as a barrier, preventing the shock waves from damaging the surrounding tissues, but also rapidly removes the heat generated during lithotripsy by the electrode assembly or fiber optic assembly, lowering the temperature of the surrounding tissue fluid.

[0019] When the first channel is connected to an injection device and the second channel is connected to an extraction device, the resulting water circulation and barrier function similarly, serving the same purpose, the only difference being the opposite direction of water flow. It should be noted that because the stone is inside the basket, the high-temperature tissue fluid and vapor generated by the electrode or fiber optic lithotripsy assembly are also located inside the basket, with the second channel being closer to these fluids. Therefore, the high-temperature tissue fluid and vapor can be extracted relatively quickly from the second channel within the basket without overflowing, resulting in less damage to human tissue.

[0020] Generally, the injection of physiological saline is carried out using a pressurized water pump. Since physiological saline has low viscosity and high purity, the resistance to injection is less. Therefore, physiological saline can be injected by relying solely on the gap between the first and second tubes, or the gap in the second channel reserved around the basket inside the second tube. Correspondingly, the first channel inside the wall of the first tube is used for the suction of hot liquid and hot steam, so that the suction process is as smooth as possible.

[0021] No one in the art has yet provided a stone retrieval basket structure that can simultaneously solve the problems of shock wave damage and high-temperature tissue fluid and high-temperature vapor damage during stone fragmentation using electrode or fiber optic assemblies. Existing stone retrieval baskets also cannot achieve the above-mentioned effects simultaneously. Therefore, the stone fragmentation and removal basket with a membrane provided by this utility model is highly innovative.

[0022] To accelerate the injection of saline solution or the aspiration of tissue fluid within the gap of the second channel, preferably, the sidewall of the second channel is uniformly provided with a plurality of guide grooves, which are parallel to the central axis.

[0023] Since the stone is confined in the center of the basket, to accelerate the injection of saline solution or the aspiration of tissue fluid within the gap of the second channel, and also to ensure that the electrodes or fiber optic heads of the electrode assembly or fiber optic assembly are aligned with the center of the basket, maximizing the application of lithotripsy energy to the stone; and also to accelerate the flow of saline solution or tissue fluid within the gap of the second channel, preferably, a plurality of limiting members are evenly distributed on the sidewall of the second channel. These evenly distributed limiting members can confine the electrodes or fiber optic heads of the electrode assembly or fiber optic assembly to the central axis of the second channel, naturally aligning them with the center of the basket.

[0024] It should be noted that the membrane can be applied to either the end of the mesh basket closer to the second tube or the end further away from the second tube. Both application sites are within the protection scope of this utility model. Preferably, the membrane is located on the side of the mesh basket closer to the first tube. When the membrane is located on the side of the mesh basket closer to the first tube, it can provide better drainage for the injected saline and aspirated tissue fluid.

[0025] Preferably, the outlet is arc-shaped. Compared to a circular outlet, when the outlet of the first channel is a flat arc shape, it helps to form a water flow barrier between the injected saline and the aspirated tissue fluid.

[0026] Preferably, the axial length of the membrane near the second tube is 1 / 3 to 1 / 2 of the axial length of the basket.

[0027] Preferably, the axial length of the membrane away from the second tube does not exceed 1 / 4 of the axial length of the basket. Preferably, the first tube also has a third channel inside its wall, and a balloon is provided on the outside of the first tube's wall, the balloon being positioned near the end of the first tube; the balloon communicates with the third channel.

[0028] It should be noted that, in addition to dilating the urethra and other areas, the balloon's most important function is to help remove smaller, fragmented stones from around the basket during lithotripsy when the basket is retrieved and the broken stones are removed. The balloon can be made of materials commonly used in this field, such as latex.

[0029] Optionally, the balloon diameter is 15 mm and the axial length is 10 mm.

[0030] It should also be noted that the balloon is able to pull out small stones because there is appropriate contact between the balloon and the urethral wall. The expanded balloon wall acts as a pusher, carrying the stone fragments out. The urethra usually contains tissue mucus or urine that acts as a lubricant, so the balloon wall generally does not damage the urethral wall when dragging the stone fragments. The broken stone fragments are also very small, and due to the entrainment by tissue mucus or urine, they do not damage the urethral wall.

[0031] Based on the above-mentioned stone crushing and cleaning basket, this utility model also provides a first stone crushing and cleaning system, including the above-mentioned stone crushing and cleaning basket with a membrane, the first tube is provided with a first handle at the head end, the second tube is provided with a second handle at the head end, and a first stone crushing part is provided in the second channel, the first stone crushing part sliding in the second channel.

[0032] This stone crushing and cleaning system has a relatively simple structure. By holding the first handle with one hand and the second handle with the other, the back-and-forth movement of the second tube within the first tube can be controlled. Simultaneously, the structure of the second handle prevents the electrode or fiber optic components from moving freely within the second tube.

[0033] Optionally, the first handle is located on both sides of the head end of the first tube, and the second handle is located in the center of the head end of the second tube, with the electrode assembly or optical fiber assembly extending out from the second handle. With this design, the first handle is controlled by the index and middle fingers, and the second handle is controlled by the thumb, meaning that the transport of the first and second tubes inside the human body, as well as the movement of the second tube back and forth from the first tube, can be completed with only one hand.

[0034] This utility model also provides a second type of stone crushing and cleaning system, which is slightly more complex than the first type of stone crushing and cleaning system described above, but the operating principle is basically the same. The second type of stone crushing and cleaning system includes the aforementioned stone crushing and cleaning basket with a membrane, and also includes an operating part and a second stone crushing part. The operating part is connected to the first pipe, and the operating part is provided with an inner pipe opening and a first liquid outlet. The inner pipe opening includes a stone crushing outlet and a second liquid outlet. The first liquid outlet communicates with the first channel / second channel, and / or, the first liquid outlet communicates with the branch. The second liquid outlet correspondingly communicates with the second channel / first channel. The stone crushing outlet communicates with the second channel, and the second stone crushing part is inserted into the second channel from the stone crushing outlet.

[0035] The second type of stone crushing and cleaning system can separate the first pipe and the second pipe, especially the first channel and the second channel, by setting up a special operating unit to avoid mutual interference.

[0036] When the above two lithotripsy and lithotripsy systems use the gap between the first and second tubes to aspirate high-temperature tissue fluid / high-temperature vapor or inject physiological saline, the first fluid outlet is connected to one of the branches of the first tube. That is to say, of the at least two branches at the head of the first tube, one branch is used to insert the electrode assembly or optical fiber assembly, and the other branch is used to aspirate high-temperature tissue fluid / high-temperature vapor or inject physiological saline.

[0037] Compared with existing technologies, the advantages of this invention are as follows: The lithotripsy and stone-clearing basket provided by this invention solves a major problem in the medical field of laser lithotripsy and electrohydraulic lithotripsy, namely, the damage to human tissue caused by lithotripsy shock waves, high-temperature tissue fluid, and high-temperature steam. By setting up a first channel and a second channel, and through the coordinated operation of the injection and aspiration devices, a stable water circulation barrier is formed near the basket and the stone by simultaneously injecting physiological saline and aspirating tissue fluid. This not only effectively blocks the mechanical damage from the lithotripsy shock waves, but also removes high-temperature tissue fluid and high-temperature steam through water circulation, avoiding burns to human tissue and achieving timely heat dissipation at the lithotripsy site. Attached Figure Description

[0038] Figure 1 A schematic diagram of the internal structure of the stone crushing and cleaning basket with a membrane provided for this utility model;

[0039] Figure 2 for Figure 1 A schematic diagram showing the flow direction of physiological saline and tissue fluid in a lithotripsy basket; the basket is not shown in the diagram.

[0040] Figure 3 for Figure 1 A schematic diagram of the internal structure of a stone crushing and cleaning basket after inserting a stone crushing electrode or optical fiber head.

[0041] Figure 4 A schematic diagram of the internal structure of another type of stone crushing and cleaning basket with a membrane provided by this utility model;

[0042] Figure 5 A schematic diagram of the internal structure of the third type of stone crushing and cleaning basket with a membrane provided by this utility model;

[0043] Figure 6 A cross-sectional schematic diagram of a coated stone crushing and cleaning mesh basket provided for this utility model (the mesh basket is not shown);

[0044] Figure 7 A schematic diagram of the internal structure of the stone crushing and cleaning basket with a membrane provided for this utility model;

[0045] Figure 8 This is a partial structural diagram of the first stone crushing and cleaning system provided by this utility model. Only the head ends of the first pipe and the second pipe are shown in the figure.

[0046] Figure 9 This is a partial structural diagram of the second type of stone crushing and cleaning system provided by this utility model. Only the head ends of the first and second pipes are shown in the figure.

[0047] In the diagram: 1. First tube; 2. Second tube; 3. Basket; 4. Covering membrane; 5. First channel; 6. Outlet; 7. Second channel; 8. Liquid extraction device; 9. Liquid injection device; 10. Guide channel; 11. Limiting component; 12. First handle; 13. Second handle; 14. Operating part; 15. Inner tube port; 16. First liquid outlet; 17. Stone crushing port; 18. Second liquid outlet; 19. Third channel; 20. Balloon; 21. Gap. Detailed Implementation

[0048] The technical solution of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] The specific embodiments of this utility model provide a stone crushing and cleaning mesh basket with a membrane, such as... Figure 1-3 As shown, it includes a first tube 1 and a second tube 2. The second tube 2 is sleeved inside the first tube 1 and slides relative to it along the axial direction. A mesh basket 3 is provided at the end of the second tube 2. A membrane 4 is provided on the end surface of the mesh basket 3 near the second tube. A first channel 5 is provided inside the tube wall of the first tube 1. A plurality of outlets 6 are provided at the end of the first channel 5. The plurality of outlets 6 are evenly distributed at the end of the tube wall of the first tube 1. A second channel 7 is provided inside the second tube 2.

[0050] Both the first channel 5 and the second channel 7 can be used for both liquid aspiration and liquid injection. Therefore, as Figure 1 , 3 As shown, the head end of the first channel 5 is connected to a liquid extraction device 8, and the head end of the second channel 7 is correspondingly connected to a liquid injection device 9; or as shown... Figure 4 As shown, the head end of the first channel 5 is connected to a liquid injection device 9, and the head end of the second channel 7 is correspondingly connected to a liquid extraction device 8.

[0051] Figure 4 In this system, when the first channel is connected to an injection device and the second channel is connected to a pumping device, the resulting water circulation and barrier are similar, serving the same function as... Figure 1-3The structures are identical, differing only in the direction of water flow. It's important to note that because the stone is inside the basket, the high-temperature tissue fluid and vapor generated by the electrode assembly or fiber optic assembly during stone fragmentation are also located inside the basket, with the second channel closer to these fluids. Therefore, the high-temperature tissue fluid and vapor can be drawn away relatively quickly from the second channel inside the basket without overflowing, resulting in less damage to human tissue.

[0052] like Figure 5 As shown, the stone crushing and cleaning basket provided by this utility model can also have a film 4 on the end surface of the basket 3 near and away from the second tube 2 at the same time, and make a gap 21 between the first tube 1 and the second tube 2; the head end of the first tube 1 is provided with two branches, one of which is connected to the liquid extraction device 8 / liquid injection device 9.

[0053] The lithotripsy basket with a membrane provided by this utility model, during lithotripsy, inserts the first and second tubes into the stone site, and manipulates the end of the second tube to extend from the end of the first tube, causing the basket to expand rapidly. The surgeon continues to manipulate the basket to capture the stone and surround it inside the basket; then, the electrode assembly or fiber optic assembly is inserted into the second channel and extends from the end of the second tube to reach the vicinity of the stone, with a gap between the electrode assembly or fiber optic assembly and the second channel; Figure 2 As shown, the aspiration and injection equipment are started, and physiological saline is injected through the gap. Tissue fluid is drawn out from the first channel. After running for a period of time, the tissue fluid near the stone forms a relatively stable water circulation. Finally, the electrode assembly or fiber optic assembly is started to complete the lithotripsy operation.

[0054] from Figure 1 , 4 As can be seen, in the lithotripsy basket provided in this specific embodiment, the membrane not only facilitates the capture and collection of stones and fragments, but also blocks the shock waves generated by the lithotripsy from damaging the surrounding tissues. Furthermore, it collects the high-temperature vapor generated during lithotripsy by the electrode or fiber optic assembly within the membrane, allowing for easy removal of the vapor. The water circulation formed by saline and tissue fluid not only works synergistically with the membrane to act as a barrier, preventing the shock waves from damaging the surrounding tissues, but also rapidly removes the heat generated during lithotripsy by the electrode or fiber optic assembly, lowering the temperature of the surrounding tissue fluid.

[0055] To accelerate the injection of saline solution or the aspiration of tissue fluid within the second channel, such as... Figure 6 As shown, the sidewall of the second channel 7 is uniformly provided with a plurality of guide grooves 10, and the guide grooves 10 are parallel to the central axis of the second channel 7.

[0056] Because the stone is confined in the center of the basket, in order to accelerate the injection of saline or the aspiration of tissue fluid within the gap of the second channel, and also to align the electrodes or fiber optic heads of the electrode assembly or fiber optic assembly with the center of the basket so that the lithotripsy energy can be applied to the stone as much as possible; and also to accelerate the flow of saline or tissue fluid within the gap of the second channel, it is also possible to... Figure 7 As shown, a plurality of limiting members 11 are evenly provided on the side wall of the second channel 7. The limiting members can limit the electrode or fiber head of the electrode assembly or fiber assembly to the central axis of the second channel, thus aligning it with the center of the basket.

[0057] Optionally, the outlet 6 is in the shape of a circular hole. Or as... Figure 8 As shown (the basket is not drawn), the outlet 6 is arc-shaped. Compared to a circular outlet, a flat arc-shaped outlet is more conducive to regulating the flow pattern of the injected saline solution and helps to form a better water circulation barrier with the aspirated tissue fluid.

[0058] Optionally, the coated area can be either the end of the basket closer to the second tube or the end farther from the second tube. Both coated areas fall within the protection scope of this utility model. Figure 1 , 3 As shown, the covering 4 is located on the side of the basket 3 closest to the first tube 1. Alternatively, as... Figure 4 As shown, the membrane 4 is located on the side of the basket 3 away from the first tube 1. It can also be as follows: Figure 5 As shown, the coating 4 is simultaneously disposed on the surface near and away from the end of the second tube 2.

[0059] Optionally, the axial length of the membrane 4 near the second tube 2 is 1 / 3 to 1 / 2 of the axial length of the basket 3.

[0060] Optionally, the axial length of the membrane 4, which is away from the second tube 2, does not exceed 1 / 4 of the axial length of the basket 3.

[0061] like Figure 5 As shown, a third channel 19 is provided inside the wall of the first tube 1, and a balloon 20 is provided outside the wall of the first tube 1. The balloon 20 is located near the end of the first tube 1; the balloon 20 is connected to the third channel 19.

[0062] Based on the aforementioned stone crushing and cleaning basket, this utility model also provides two structures for stone crushing and cleaning systems, such as... Figure 8As shown, the first type of stone crushing and cleaning system includes, in addition to the stone crushing and cleaning basket mentioned above, a first handle 12 is provided at the head end of the first pipe 1, a second handle 13 is provided at the head end of the second pipe 2, and a first stone crushing part is provided in the second channel 7, which slides in the second channel 7.

[0063] like Figure 9 As shown, the second type of crushing and cleaning system includes, in addition to the aforementioned crushing and cleaning basket, an operating part 15 and a second crushing part. The operating part 14 is connected to the first pipe 1. The operating part 14 is provided with an inner pipe port 15 and a first liquid outlet 16. The inner pipe port 15 includes a crushing outlet 17 and a second liquid outlet 18. The first liquid outlet 16 is connected to the first channel 5. The second liquid outlet 18 is correspondingly connected to the second channel 7. The crushing outlet 17 is connected to the second channel 7, and the second crushing part is inserted into the second channel 7 from the crushing outlet 17.

[0064] Optionally, in the two lithotripsy and lithotripsy systems provided in this specific embodiment, when using the gap between the first and second tubes to aspirate high-temperature tissue fluid / high-temperature steam or inject physiological saline, one branch at the head end of the first tube is connected to the first fluid outlet. Optionally, in this specific embodiment, the first and second tubes can be made of non-metallic materials. The basket used is composed of several wires of metallic material (or other materials with the same function), the initial state of which is a bent shape, forming a cage-like structure of the basket. The selected metallic wires should have a certain degree of toughness, so that they can be easily stored in the first tube and can also be easily and quickly released from the first tube to expand into a cage-like structure. Further optionally, the metallic wires can be made of nickel-titanium or stainless steel.

[0065] The above detailed embodiments describe the implementation of this utility model; however, this utility model is not limited to the specific details described above. Within the scope of the claims and technical concept of this utility model, various simple modifications and alterations can be made to the technical solution of this utility model, and all such simple modifications fall within the protection scope of this utility model.

Claims

1. A membrane-covered stone extraction basket, comprising: The device comprises a first tube and a second tube, the second tube is sleeved inside the first tube and slides axially, the end of the second tube is provided with a basket, the end surface of the basket close to and / or away from the second tube is provided with a film; The first tube is provided with a first channel in the tube wall, the end of the first channel is provided with a plurality of outlets, the plurality of outlets are uniformly distributed at the end of the tube wall of the first tube, the head end of the first channel is connected with a liquid pumping device / liquid injection device; and / or, there is a gap between the first tube and the second tube, the head end of the first tube is provided with at least two branches, one of which is connected with the liquid pumping device / liquid injection device; The second tube is provided with a second channel inside; the head end of the second channel is correspondingly connected with a liquid injection device / liquid pumping device.

2. The membrane-coated stone basket of claim 1, wherein, The side wall of the second channel is uniformly provided with a plurality of guide grooves, which are parallel to the central axis.

3. The membrane-coated stone basket of claim 1, wherein, The side wall of the second channel is uniformly provided with a plurality of limiting members.

4. The membrane-coated stone basket of claim 1, wherein, The film is located on the side of the basket close to the first tube.

5. The membrane-coated stone basket of claim 1, wherein, The shape of the outlet is arc-shaped.

6. The membrane-coated stone basket of claim 1, wherein, The axial length of the film close to the second tube is 1 / 3-1 / 2 of the axial length of the basket.

7. The membrane-coated stone basket of claim 1, wherein, The axial length of the film away from the second tube is not more than 1 / 4 of the axial length of the basket.

8. The membrane-coated stone basket of claim 1, wherein, The first tube is also provided with a third channel in the tube wall, the outer side of the tube wall of the first tube is provided with a balloon, the balloon is arranged close to the end of the first tube; the balloon is in communication with the third channel.

9. A lithotripsy system, comprising: The device comprises the basket with film according to any one of claims 1-8, the head end of the first tube is provided with a first handle, the head end of the second tube is provided with a second handle, the second channel is provided with a first lithotripsy part inside, the first lithotripsy part slides in the second channel.

10. A lithotripsy system, comprising: The device comprises the basket with film according to any one of claims 1-8, further comprising an operation part and a second lithotripsy part, the operation part is connected with the first tube, the operation part is provided with an inner tube opening and a first liquid flow opening, the inner tube opening comprises a lithotripsy opening and a second liquid flow opening; The first liquid flow opening is in communication with the first channel / second channel, and / or the first liquid flow opening is in communication with the branch; the second liquid flow opening is correspondingly in communication with the second channel / first channel; the lithotripsy opening is in communication with the second channel, and the second lithotripsy part is inserted into the second channel from the lithotripsy opening.

Images