A laser lithotripsy system

Abstract

The application provides a laser lithotripsy system, and relates to the technical field of endoscopes. The laser lithotripsy system comprises a catheter assembly, a visual assembly and a laser light guide assembly. The catheter assembly has a distal end, a proximal end and a plurality of channels. The plurality of channels are arranged from the distal end to the proximal end and extend through the catheter assembly. The visual assembly has a probe end. The probe end is arranged in one of the channels. The visual assembly is used for acquiring an image of the distal end of the catheter assembly. The laser light guide assembly has a laser exit end. The laser exit end is arranged in one of the channels. The laser light guide assembly is used for transmitting a lithotripsy laser to the distal end of the catheter assembly. The application can introduce the laser lithotripsy technology into an ERCP operation to replace the use of a lithotripsy basket, and the operation efficiency is high.

Description

Technical Field

[0001] This application relates to the field of endoscopic technology, and more particularly to a laser lithotripsy system. Background Technology

[0002] Laser lithotripsy is a clinically available technique that uses a laser beam to directly bombard the stones, causing them to gradually break down. However, laser lithotripsy cannot be used in traditional ERCP surgery because ERCP does not allow for direct observation of the lesion; all observation is done using X-rays taken along a specific cutting direction. Since lasers are directional, the procedure must be monitored under direct vision.

[0003] Therefore, how to introduce a laser with a wider range of applications into the bile duct to break up stones, in order to replace the stone-breaking basket used in ERCP surgery and thus reduce the difficulty of ERCP surgery, is a technical problem that urgently needs to be solved by technicians in this field. Utility Model Content

[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a laser lithotripsy surgical system that can introduce laser lithotripsy technology into ERCP surgery to replace the use of lithotripsy baskets, and with high surgical efficiency.

[0005] This application provides the following technical solution:

[0006] This application provides a laser lithotripsy surgical system, the laser lithotripsy surgical system comprising:

[0007] A catheter assembly having a distal end, a proximal end, and multiple channels, each of the multiple channels extending from the distal end to the proximal end and penetrating the catheter assembly;

[0008] A visual component having a probe end that passes through one of the channels, the visual component being used to acquire an image of the distal end of the catheter assembly;

[0009] A laser light guide assembly, the laser light guide assembly having a laser emitting end, the laser emitting end being disposed in one of the channels, the laser light guide assembly being used to transmit lithotripsy laser to the distal end of the conduit assembly.

[0010] In some embodiments, the probe end and the laser emission end pass through the same channel;

[0011] Alternatively, the channels corresponding to the probe end and the laser emission end are close to each other.

[0012] In some embodiments, the plurality of channels includes at least two inner channels and at least one outer channel;

[0013] The catheter assembly includes:

[0014] A sheath having the internal channel;

[0015] A connecting part is provided, which is connected to the outer wall of the sheath, and the connecting part is provided with the outer channel; wherein at least the probe end passes through the outer channel.

[0016] In some embodiments, the laser emitting end is disposed in the inner channel near the outer channel, and the outer channel corresponding to the laser lithotripsy fiber has a side opening in its hole wall. The side opening is connected to the outer channel and extends along the extension direction of the outer channel. The side opening passes through both ends of the outer channel, and the width of the side opening is smaller than the outer diameter of the laser emitting end.

[0017] In some embodiments, there are multiple connecting portions, which are axially spaced apart from each other in the sheath, and an external channel is formed between the connecting portions and the sheath.

[0018] In some embodiments, the laser light guide assembly includes a laser lithotripsy fiber, which is disposed in one of the channels;

[0019] The visual component includes a camera module and an insertion tube, both of which are disposed through the channel, with the camera module located at the end of the insertion tube closer to the distal end.

[0020] In some embodiments, the laser lithotripsy system further includes a sealing component having a deformable end that can switch between a contracted state and an extended state; wherein, in the contracted state, the deformable end is movably inserted into one of the channels; and in the extended state, the deformable end can seal the body cavity in which it is located.

[0021] In some embodiments, the occlusion assembly is configured as a stone retrieval balloon or a stone retrieval net, the tip of which is inserted through one of the channels, and the catheter assembly also has a reflux channel that extends from the distal end to the proximal end and passes through the catheter assembly.

[0022] In some embodiments, the occlusion assembly is configured as a stone retrieval balloon, the stone retrieval balloon including a balloon and a delivery tube, the delivery tube passing through one of the channels, the balloon being disposed at one end of the delivery tube near the distal end, and the delivery tube having a first delivery channel and a second delivery channel;

[0023] Wherein, the first delivery channel near the distal end forms a first inlet / outlet on the outer wall of the delivery tube, the first inlet / outlet being connected to the balloon, the first delivery channel away from the distal end forms a second inlet / outlet on the outer wall of the delivery tube; the second delivery channel near the distal end forms a third inlet / outlet on the outer wall of the delivery tube, the second inlet / outlet being located on the side of the balloon away from the distal end, and the second delivery channel away from the distal end forms a fourth inlet / outlet on the outer wall of the delivery tube.

[0024] In some embodiments, the blocking assembly is configured as a stone-collecting mesh, the blocking assembly includes an elastic guide wire and a delivery tube, the delivery tube passing through one of the channels, the delivery tube having a first delivery channel and a second delivery channel, one end of the first delivery channel forming a first inlet / outlet on the end face of the delivery tube near the distal end, the other end of the first delivery channel away from the distal end forming a second inlet / outlet on the outer wall of the delivery tube; the other end of the second delivery channel near the distal end forming a third inlet / outlet on the outer wall of the delivery tube, and the other end of the second delivery channel away from the distal end forming a fourth inlet / outlet on the outer wall of the delivery tube;

[0025] The elastic guide wire is inserted into the first delivery channel, and the elastic guide wire has a pre-shaped section, which is close to the distal end; wherein, when the pre-shaped section is unrestricted, the pre-shaped section is configured to recover its deformation to a preset interception structure.

[0026] In some embodiments, the preset interception structure is an interception net, which is configured to be a spiral shape that contracts or expands.

[0027] The embodiments of this application have the following advantages:

[0028] This application provides a laser lithotripsy system. The system utilizes a catheter assembly to constrain and limit a visual assembly and a laser light guide assembly, and uses a channel to guide these assemblies. During ERCP surgery, based on an image of the stone acquired at the probe end of the visual assembly, a lithotripsy laser is emitted from the laser emission end of the laser light guide assembly to break down the stone. This not only expands the application range of laser technology in the treatment of biliary stones but also reduces trauma to the patient, while improving surgical efficiency and success rate. Furthermore, compared to traditional mechanical lithotripsy methods such as lithotripsy baskets, laser lithotripsy can reduce the risk of complications and accelerate postoperative recovery.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the structure of a laser lithotripsy surgical system provided in Embodiment 1 of this application is shown from one perspective.

[0032] Figure 2 This illustration shows a schematic diagram of the catheter assembly of a laser lithotripsy system according to Embodiment 1 of this application from one perspective.

[0033] Figure 3 A schematic diagram of the catheter assembly of a laser lithotripsy system according to Embodiment 2 of this application is shown from one perspective.

[0034] Figure 4 A schematic diagram of the catheter assembly of a laser lithotripsy system according to Embodiment 3 of this application is shown from one perspective.

[0035] Figure 5 A schematic diagram of the catheter assembly of a laser lithotripsy system according to Embodiment 4 of this application is shown from one perspective.

[0036] Explanation of key component symbols:

[0037] 100-Occlusion assembly; 200-Cavity; 300-Stone; 400-Laser guide assembly; 500-Visual assembly; 600-Catheter assembly; 610-Channel; 611-Internal channel; 6111-Side opening; 612-External channel; 620-Connector; 630-Sheath; 640-Return channel. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0039] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Among related technologies, laser lithotripsy is a clinically viable technique that uses a laser beam to directly bombard the stones, causing them to gradually break down. However, laser lithotripsy cannot be used in traditional ERCP surgery because ERCP lacks direct observation of the lesion; all observation is achieved through X-rays taken along a specific cutting direction. Since lasers are directional, the procedure must be monitored under direct vision. Therefore, how to introduce a more versatile laser into the bile duct to fragment stones, replacing the lithotripsy basket used in ERCP and thus reducing the difficulty of ERCP surgery, is a technical problem that urgently needs to be solved by those skilled in the art.

[0044] As shown in Figure 1 and Figure 2As shown, in order to solve the above-mentioned technical problems, this application provides a laser lithotripsy surgical system. The laser lithotripsy surgical system includes a catheter assembly 600, a visual assembly 500, and a laser light guide assembly 400. The catheter assembly 600 has a distal end, a proximal end, and multiple channels 610. The multiple channels 610 extend from the distal end to the proximal end and pass through the catheter assembly 600. The visual assembly 500 has a probe end that passes through one of the channels 610. The visual assembly 500 is used to acquire an image of the distal end of the catheter assembly 600. The laser light guide assembly 400 has a laser emitting end that passes through one of the channels 610. The laser light guide assembly 400 is used to transmit lithotripsy laser to the distal end of the catheter assembly 600.

[0045] In these embodiments, this laser lithotripsy system is designed to address the problem that laser lithotripsy cannot be directly used in conventional ERCP (endoscopic retrograde cholangiopancreatography) procedures. This is achieved by introducing a system comprising a catheter assembly 600, a visualization assembly 500, and a laser beam guide assembly 400.

[0046] The catheter assembly 600 serves as the carrier of the entire system and has multiple channels 610 that extend throughout the catheter, from distal to proximal. For example, the catheter assembly 600 is configured axially, with the channels 610 extending along this axial direction. Clearly, this design allows different tools or devices to be guided to target locations, such as inside the bile duct.

[0047] The visualization component 500 provides a probe end that can pass through one of the channels 610 to reach the target location and acquire images of the distal end of the catheter assembly 600. This solves the problem of precise laser irradiation control during ERCP procedures due to reliance on X-ray imaging, allowing surgeons to operate under direct vision, thereby improving the safety and accuracy of the procedure.

[0048] The laser beam guide assembly 400 is responsible for transmitting the laser used for lithotripsy to the distal end of the catheter. Through a specific laser emission end, the laser energy can be accurately directed to the stone 300, causing it to gradually break down into smaller fragments that are easier to expel from the body.

[0049] Therefore, this application utilizes the catheter assembly 600 to constrain the visualization assembly 500 and the laser light guide assembly 400, and uses the channel 610 to guide the visualization assembly 500 and the laser light guide assembly 400. This allows for the acquisition of an image of the stone 300 at the probe end of the visualization assembly 500 during ERCP surgery, followed by the emission of a lithotripsy laser from the laser light guide assembly 400 to break down the stone 300. This not only expands the application range of laser technology in the treatment of biliary stones 300 but also reduces trauma to the patient, while improving surgical efficiency and success rate. Furthermore, compared to traditional mechanical lithotripsy methods such as lithotripsy baskets, laser lithotripsy can reduce the risk of complications and accelerate postoperative recovery.

[0050] like Figure 3 As shown, in some embodiments, the probe end and the laser emission end are disposed in the same channel 610.

[0051] In these embodiments, integrating the probe end and the laser emission end into a single channel 610 reduces the diameter or overall complexity of the catheter assembly 600, making the system more compact and facilitating passage through natural body cavities 200 or narrow areas. Furthermore, when the visualization tool and laser output are on the same path, the physician can see the laser irradiation location more directly and accurately, thereby improving positioning accuracy during treatment and reducing the risk of accidental damage to surrounding healthy tissue.

[0052] Furthermore, the shared channel 610 design for the probe and laser emission ends may simplify operation, especially when simultaneous adjustment of the viewing angle and laser focus is required, as their relative positions remain fixed, facilitating more precise operational control. However, this design requires ensuring that both can move relative to each other in the extension direction, allowing for flexible adjustment of the laser emission end and probe end positions based on the location of the stone 300.

[0053] like Figure 4 As shown, in some embodiments, the channels 610 corresponding to the probe end and the laser emission end are close to each other.

[0054] In these embodiments, unlike the above-described implementation, the probe end and the laser emission end can be designed to be located in two different channels 610, but these two channels 610 are close to each other. That is, the probe end and the laser emission end are not in the same channel 610, but these two channels 610 are very close, so that the doctor can more accurately locate the laser irradiation position through the image obtained by the probe, thereby precisely breaking up the stone 300.

[0055] Furthermore, separating the probe end and the laser emission end can avoid potential interference or damage to the imaging equipment caused by laser energy, ensuring optimal image quality and laser effect at the same time.

[0056] Furthermore, the two independent but adjacent channels 610 allow doctors to flexibly adjust the probe angle and laser emission angle according to the actual situation, which helps to treat stones of different locations and sizes 300.

[0057] It should be added that, since lasers generate heat when they are working, separating the laser output end from the probe end can help to better manage and disperse the heat, thus protecting sensitive optical and electronic components.

[0058] In some embodiments, the plurality of channels 610 includes at least two inner channels 611 and at least one outer channel 612.

[0059] The catheter assembly 600 includes a sheath 630 and a connector 620. The sheath 630 is provided with an inner channel 611. The connector 620 is connected to the outer wall of the sheath 630, and the connector 620 is provided with an outer channel 612.

[0060] In these embodiments, the catheter assembly 600 is designed to have at least two inner channels 611 and at least one outer channel 612. The sheath 630 is the main part of the catheter assembly 600, and the sheath 630 has at least two inner channels 611 inside. These inner channels 611 can be used to insert different tools or components, such as a laser guide assembly 400, a stone retrieval basket, or other auxiliary instruments.

[0061] The connecting portion 620 is an external part attached to the sheath 630, connected to the outer wall of the sheath 630, and has at least one external channel 612 inside it. This external channel 612 is typically used to pass through the probe end, i.e., the front end of the visualization component. Of course, it can also be used to pass through the laser emission end, etc.

[0062] Clearly, this design allows the probe tip to move outside the sheath 630. It should be noted that a connector is located at the end of the visual component 500 furthest from the probe tip, for connecting to a control or display device to display the remote image. However, the connector is relatively large and does not require passage through the external channel 612. In cases where the probe tip needs to be left in place after lithotripsy, it would be inconvenient to remove the sheath 630 and the laser emission end.

[0063] Therefore, by setting the connecting part 620 to construct the outer channel 612, the probe end and the sheath 630 can be separated during the process of pulling back the sheath 630 by separating the connecting part 620 and the sheath 630 or damaging the connecting part 620.

[0064] For example, in this embodiment, the connection 620 can be separated by cutting it with an external instrument. In this case, the connection 620 can be in the form of a strip, such as a soft strip. Alternatively, a breakable section can be provided in the connection 620, allowing it to break under external force, thereby detaching the probe end.

[0065] like Figure 5 As shown, in some embodiments, the laser emitting end is inserted into the inner channel 611 near the outer channel 612. The outer channel 612 corresponding to the laser lithotripsy fiber has a side opening 6111 in its hole wall. The side opening 6111 is connected to the outer channel 612. The side opening 6111 extends along the extension direction of the outer channel 612 and penetrates both ends of the outer channel 612. The width of the side opening 6111 is smaller than the outer diameter of the laser emitting end.

[0066] In these embodiments, the laser emitting end is inserted into an inner channel 611 near the outer channel 612, and a side opening 6111 is provided on the hole wall of the outer channel 612. The side opening 6111 makes the hole wall of the inner channel 611 form a non-closed structure, thereby further reducing the gap between the laser emitting end and the probe end.

[0067] The laser emission end is placed in an inner channel 611 that is very close to the outer channel 612. This arrangement allows the laser to be more precisely aimed at the target stone 300, and also facilitates its use with the probe end.

[0068] The width of the side opening 6111 is designed to be smaller than the outer diameter of the laser emitting end. This prevents the laser emitting end from accidentally sliding into the outer channel 612 and causing interference between the laser emitting end and the probe end. In other words, the width of the side opening 6111 is smaller than the diameter of the laser emitting end, avoiding the risk of accidental movement or damage to the laser fiber.

[0069] like Figure 5 As shown, in some embodiments, there are multiple connecting portions 620, which are spaced apart axially in the sheath tube 630, and an outer channel 612 is formed between the connecting portions 620 and the sheath tube 630.

[0070] In these embodiments, an outer channel 612 is formed between each connecting portion 620 and the sheath 630, and the outer channel 612 has a multi-segment structure. That is, there is a certain distance between the connecting portions 620, which means that the outer channel 612 is not continuous, but segmented.

[0071] Clearly, the separate nature of the connectors 620 helps to disperse heat and prevent localized overheating, especially when using lasers. By rationally distributing the positions of the connectors 620, the overall structural strength of the catheter can be increased while maintaining its flexibility.

[0072] For example, one external channel 612 can be used to insert a probe end, providing real-time images of the surgical area to help doctors more accurately locate the stone 300 and monitor the surgical process. Other external channels 612 can be used to insert auxiliary instruments such as stone retrieval baskets and irrigation catheters, supporting a variety of surgical procedures.

[0073] In some embodiments, the laser light guide assembly 400 includes a laser lithotripsy fiber that passes through a channel 610.

[0074] The visual component 500 includes an ultra-fine endoscope, the tip of which passes through a channel 610.

[0075] In these embodiments, the specific configurations of the laser light guide assembly 400 and the viewing assembly 500 are as follows:

[0076] The laser beam guide assembly 400 includes a laser lithotripsy fiber, a type of fiber capable of transmitting high-energy laser light to transfer laser energy from the laser generator to the location of the stone 300. The laser lithotripsy fiber is threaded within a dedicated channel 610, which is designed to be small enough to accommodate the fiber while ensuring it is not damaged or excessively bent. When the laser reaches the end of the fiber, it is focused and emitted, directly acting on the stone 300, causing it to gradually fragment through a thermal effect.

[0077] The visualization component 500 includes an ultra-thin endoscope, a very slim endoscope specifically designed for use in confined spaces such as the biliary tract or urinary system. The tip of the ultra-thin endoscope (i.e., the probe end) passes through a separate channel 610. The ultra-thin endoscope provides real-time video images, allowing the physician to clearly observe the surgical area. This helps to precisely locate the stone 300 and monitor the laser lithotripsy process, thereby improving the safety and accuracy of the procedure.

[0078] The laser lithotripsy fiber and the ultra-thin endoscope are located in separate channels 610. This design avoids interference between the two and facilitates individual control and operation. Each channel 610 is optimized for the components passing through it to ensure optimal performance. For example, the channel 610 containing the laser fiber can be straighter and stiffer to ensure efficient laser transmission; while the channel 610 containing the ultra-thin endoscope has a certain degree of flexibility to better adapt to the curved paths within the human body.

[0079] The high-definition visual feedback provided by the ultra-fine endoscope allows the laser to target the stone 300 more precisely, reducing potential damage to surrounding healthy tissue.

[0080] like Figure 1As shown, in some embodiments, the laser lithotripsy system further includes a sealing component 100, which has a deformable end that can switch between a contracted state and an extended state; wherein, in the contracted state, the deformable end can be movably inserted into a channel 610; and in the extended state, the deformable end can seal the human body cavity 200 in which it is located.

[0081] In these embodiments, the design of the occlusion component 100 is an important addition, helping to better control the surgical area, especially when it is necessary to prevent fluid or stone fragments from moving to other areas.

[0082] The deformable end is the core component of the occlusion assembly 100, capable of switching between a contracted state and an expanded state. Contracted state: In this state, the deformable end remains compact and can easily pass through a channel 610 of the catheter assembly 600. This allows the occlusion assembly 100 to be guided to the target location. Expanded state: Once the predetermined location is reached, the deformable end can expand through some mechanism (such as inflation, mechanical expansion, etc.) to seal the body cavity 200. In this state, the deformable end can effectively prevent fluid flow or displacement of stone 300 fragments.

[0083] The occlusion component 100 can isolate a specific area during surgery to prevent bile or other fluids from flowing into the surgical area, thereby improving the clarity of the surgical field and reducing the risk of infection. When dealing with stone 300, the occlusion component 100 can help fix the position of stone 300, preventing it from shifting during the procedure, thereby improving the success rate of the surgery.

[0084] Furthermore, the occlusion component 100 can protect surrounding healthy tissue from laser energy, reducing unnecessary damage. The occlusion component 100 can not only be used for occlusion but also as an auxiliary tool to help position or stabilize other instruments in certain situations.

[0085] The occlusion assembly 100 should be made of biocompatible materials to ensure it is harmless to the patient. Simultaneously, the material needs to possess sufficient flexibility and durability to accommodate the bending of the body cavity 200 and the need for repeated use. The deformable end of the occlusion assembly 100 requires a reliable control mechanism to switch from a contracted to an deployed state. Examples include an inflatable balloon, a spring device, or an inflatable structure. The size and shape of the occlusion assembly 100 need to be optimized for the specific application to ensure it can pass smoothly through the catheter channel 610 and deploy effectively at the target location.

[0086] For example, during ERCP, the occlusion assembly 100 can be used to occlude the common bile duct or intrahepatic bile duct to prevent bile reflux and provide a clearer operating view. When dealing with kidney stone 300 or ureteral stone 300, the occlusion assembly 100 can be used to occlude the ureter to prevent fragments of the stone 300 from entering the bladder.

[0087] like Figure 1 As shown, in some embodiments, the occlusion component 100 is configured as a stone retrieval balloon or stone retrieval net, the head of which is inserted through a channel 610. The catheter assembly 600 also has a return channel 640, which extends from the distal end to the proximal end and passes through the catheter assembly 600.

[0088] In these embodiments, the occlusion component 100 may be designed as a stone retrieval balloon or a stone retrieval net, and the head of these components passes through a channel 610. This design combines the functions of occlusion and stone retrieval, making the surgical procedure more efficient and versatile.

[0089] Stone Removal Balloon: This is an inflatable balloon, typically made of a soft yet durable material. It can be inserted into the body in a constricted state through a channel 610 of the catheter assembly 600, and inflates upon reaching the target location. When inflated, the balloon effectively seals body cavities 200 (such as the bile duct), preventing fluid flow or movement of stone fragments 300. The balloon surface can be designed to be rough or have gripping structures to grasp and remove fragmented stones 300.

[0090] Stone retrieval net: This is a mesh structure, typically made of metal wire or other biocompatible materials. The stone retrieval net can be inserted into the body through a channel 610 of a catheter while in a constricted state, and unfolds upon reaching the target location. The stone retrieval net can partially block the body cavity 200 through its mesh structure; although not as completely sealed as a balloon, it can still effectively restrict fluid flow and stone movement. The stone retrieval net has good gripping ability, effectively capturing and removing stones or stone fragments.

[0091] Clearly, both the retrieval balloon and the retrieval net have their heads inserted into a dedicated channel 610. This channel 610 needs to be large enough to accommodate the components and ensure smooth entry and exit. A reliable control mechanism is required to inflate / deflate the balloon or deploy / retrieve the retrieval net. This involves devices including syringes, valves, or other mechanical mechanisms.

[0092] Therefore, the same component can be used for both occlusion and stone removal, reducing the need to change tools during surgery and improving efficiency. The occlusion function prevents stone fragments from entering other areas, reducing the risk of complications. The multi-purpose design of this single component simplifies the surgical procedure, making it easier for doctors to operate. Combined with an ultra-fine endoscope, doctors can monitor the occlusion and stone removal process in real time, ensuring the accuracy of the operation.

[0093] For example, during ERCP, a lithotripsy balloon or lithotripsy net can be used to occlude the common bile duct or intrahepatic bile duct while removing stone 300. When dealing with kidney stone 300 or ureteral stone 300, a lithotripsy balloon or lithotripsy net can be used to occlude the ureter, preventing stone 300 fragments from entering the bladder and aiding in the removal of stone 300.

[0094] In addition, by setting up a reflux channel 640 to work with the infusion cavity 200 of the stone retrieval balloon or stone retrieval net, it is possible to flush and extract the liquid in the cavity 200, which is conducive to the removal of the decomposed stones 300.

[0095] like Figure 1 As shown, in some embodiments, the blocking component 100 is configured as a stone retrieval balloon, which includes a balloon and a delivery tube. The delivery tube passes through a channel 610, the balloon is disposed at one end of the delivery tube near the distal end, and the delivery tube has a first delivery channel 610 and a second delivery channel 610.

[0096] The first delivery channel 610 has a first inlet / outlet formed on the outer wall of the delivery tube at the end near the distal end, and the first inlet / outlet is connected to the balloon. The second delivery channel 610 has a second inlet / outlet formed on the outer wall of the delivery tube at the end away from the distal end. The second delivery channel 610 has a third inlet / outlet formed on the outer wall of the delivery tube at the end near the distal end, and the second inlet / outlet is located on the side of the balloon away from the distal end. The second delivery channel 610 has a fourth inlet / outlet formed on the outer wall of the delivery tube at the end away from the distal end.

[0097] In these embodiments, the occlusion assembly 100 is designed as a stone retrieval balloon with a complex internal structure to achieve multiple functions. Specifically, the stone retrieval balloon includes a balloon and a delivery tube, wherein the delivery tube has two independent delivery channels 610, namely a first delivery channel 610 and a second delivery channel 610. The balloon is located at the distal end of the delivery tube and is used to occlude a body cavity 200 (such as a bile duct) or to grasp and remove a stone 300. The delivery tube is the carrier of the balloon and passes through a channel 610 of the catheter assembly 600. A first inlet / outlet is located on the outer wall of the distal end of the delivery tube and communicates with the balloon for inflating / deflating the balloon. A second inlet / outlet is located on the outer wall of the opposite end of the delivery tube and is used to connect to an external inflation / deflation device. A third inlet / outlet is located on the outer wall of the distal end of the delivery tube, but on the side of the balloon away from the distal end, and can be used for injecting liquid, flushing, or other auxiliary operations. The fourth inlet / outlet is located on the outer wall of the end of the delivery pipe away from the far end, and is used to connect to an external liquid injection or suction device.

[0098] The two independent delivery channels 610 allow for multiple simultaneous procedures, such as inflating the balloon while simultaneously rinsing or aspirating. This eliminates the need for frequent tool changes or repositioning, thus improving surgical efficiency. It also enables more precise control over balloon inflation and fluid flow, ensuring the safety and effectiveness of the procedure. Precise control of the balloon and fluid flow reduces the risk of infection and other complications.

[0099] For example, during ERCP, a stone retrieval balloon can be delivered via catheter to the common bile duct or intrahepatic bile duct. After inflation, the balloon can seal the bile duct, preventing bile reflux. Simultaneously, the second delivery channel 610 can be used to flush the bile duct and remove stone fragments.

[0100] When treating kidney stone 300 or ureteral stone 300, the lithotripsy balloon can be used to block the ureter to prevent stone fragments from entering the bladder. Simultaneously, the second delivery channel 610 can be used to flush the ureter, helping to remove stone fragments.

[0101] It should be noted that, compared with existing stone retrieval balloons, the stone retrieval balloon provided in this application has only two delivery channels 610, namely an air injection chamber for expanding and contracting the balloon body and a liquid injection chamber for delivering water or for attracting water / stone mixtures, and does not have a guidewire chamber and a contrast ring. Obviously, this allows for a reduction in outer diameter.

[0102] In some embodiments, the blocking component 100 is configured as a stone-collecting mesh. The blocking component 100 includes an elastic guide wire and a delivery tube. The delivery tube passes through a channel 610 and has a first delivery channel 610 and a second delivery channel 610. One end of the first delivery channel 610 has a first inlet / outlet formed on the end face of the delivery tube near the distal end, and the other end of the first delivery channel 610 away from the distal end has a second inlet / outlet formed on the outer wall of the delivery tube. The other end of the second delivery channel 610 near the distal end has a third inlet / outlet formed on the outer wall of the delivery tube, and the other end of the second delivery channel 610 away from the distal end has a fourth inlet / outlet formed on the outer wall of the delivery tube.

[0103] An elastic guide wire is inserted into the first delivery channel 610, and the elastic guide wire has a pre-shaped section near the distal end; wherein, when the pre-shaped section is in an unrestricted state, the pre-shaped section is configured to recover its deformation to a preset interception structure.

[0104] In these embodiments, the occlusion assembly 100 is designed as a stone-removing mesh and includes a flexible guide wire and a delivery tube. This design enables the occlusion assembly 100 not only to block the human body cavity 200, but also to effectively capture and remove fragments of the stone 300.

[0105] An elastic guidewire is a type of guidewire with shape memory properties, capable of returning to a pre-shaped, preset interception structure when unrestricted. The pre-shaped segment is located near the distal end of the elastic guidewire; when not restricted by external forces, this segment can return to a specific shape (such as a basket shape, a spiral shape, etc.) for intercepting and capturing stones.

[0106] The preformed segment can form a preset interception structure in the deployed state to prevent the stone 300 or stone 300 fragments from passing through. The preformed segment can grasp the stone 300 or stone 300 fragments to remove them from the body. The delivery tube is the carrier of the elastic guidewire and passes through a channel 610 of the catheter. There are two independent delivery channels 610 inside the delivery tube.

[0107] The first inlet / outlet is located on the end face of the delivery tube near the distal end, and is connected to the elastic guidewire, allowing the elastic guidewire to pass through. The second inlet / outlet is located on the outer wall of the end of the delivery tube away from the distal end, and is used to connect to an external operating device to control the movement and shape changes of the elastic guidewire.

[0108] The third inlet / outlet is located on the outer wall of the end of the delivery pipe closest to the distal end and can be used for liquid injection, flushing, or other auxiliary operations. The fourth inlet / outlet is located on the outer wall of the end of the delivery pipe away from the distal end and is used to connect to external liquid injection or suction devices.

[0109] Clearly, the two independent delivery channels 610 allow for multiple operations to be performed simultaneously, such as flushing or aspiration while deploying the stone retrieval net. This eliminates the need for frequent tool changes or repositioning, thus improving surgical efficiency. It also enables more precise control over the deployment of the stone retrieval net and the flow of fluids, ensuring the safety and effectiveness of the surgical procedure. Precise control of the stone retrieval net and fluid flow reduces the risk of infection and other complications.

[0110] In some embodiments, the preset interception structure is an interception net, which is configured to be a spiral shape that contracts or expands.

[0111] In these embodiments, the pre-shaped segment is located near the distal end of the elastic guidewire. When not constrained by external forces, this segment can return to a specific shape, namely, a contracting or expanding spiral-shaped interception net. The spiral-shaped interception net can form an effective interception structure in its deployed state, preventing the passage of stones 300 or fragments of stones 300. The spiral-shaped interception net can also grasp stones 300 or fragments of stones 300 for removal from the body.

[0112] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0113] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0114] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A laser lithotripsy surgical system, characterized in that, The laser lithotripsy system includes: A catheter assembly having a distal end, a proximal end, and multiple channels, each of the multiple channels extending from the distal end to the proximal end and penetrating the catheter assembly; A visual component having a probe end that passes through one of the channels, the visual component being used to acquire an image of the distal end of the catheter assembly; A laser light guide assembly, the laser light guide assembly having a laser emitting end, the laser emitting end being disposed in one of the channels, the laser light guide assembly being used to transmit lithotripsy laser to the distal end of the conduit assembly.

2. The laser lithotripsy system according to claim 1, characterized in that, The probe end and the laser emission end are disposed in the same channel; Alternatively, the channels corresponding to the probe end and the laser emission end are close to each other.

3. The laser lithotripsy system according to claim 2, characterized in that, The plurality of channels includes at least two inner channels and at least one outer channel; The catheter assembly includes: A sheath having the internal channel; A connecting part is provided, which is connected to the outer wall of the sheath, and the connecting part is provided with the outer channel; wherein at least the probe end passes through the outer channel.

4. The laser lithotripsy system according to claim 3, characterized in that, The laser emitting end is inserted into the inner channel near the outer channel. The outer channel corresponding to the laser emitting end has a side opening in its wall. The side opening is connected to the outer channel and extends along the extension direction of the outer channel. The side opening passes through both ends of the outer channel and the width of the side opening is smaller than the outer diameter of the laser emitting end.

5. The laser lithotripsy system according to claim 3, characterized in that, The number of connecting parts is multiple, and the multiple connecting parts are arranged axially spaced apart in the sheath tube, forming an external channel between the connecting parts and the sheath tube.

6. The laser lithotripsy system according to any one of claims 1 to 5, characterized in that, The laser light guide assembly includes a laser lithotripsy fiber, which is inserted into one of the channels; The visual component includes an ultra-thin endoscope, the tip of which is inserted into one of the channels.

7. The laser lithotripsy system according to claim 1, characterized in that, The laser lithotripsy system also includes a sealing component, which has a deformable end that can switch between a contracted state and an expanded state. In the contracted state, the deformable end can be movably inserted into one of the channels. In the expanded state, the deformable end can seal the body cavity in which it is located.

8. The laser lithotripsy system according to claim 7, characterized in that, The occlusion assembly is configured as a stone retrieval balloon or a stone retrieval net, the head of which is inserted through one of the channels. The catheter assembly also has a reflux channel, which extends from the distal end to the proximal end and passes through the catheter assembly.

9. The laser lithotripsy system according to claim 8, characterized in that, The blocking component is configured as a stone retrieval balloon, which includes a balloon and a delivery tube. The delivery tube passes through one of the channels, and the balloon is located at one end of the delivery tube near the distal end. The delivery tube has a first delivery channel and a second delivery channel. Wherein, the first delivery channel near the distal end forms a first inlet / outlet on the outer wall of the delivery tube, the first inlet / outlet being connected to the balloon, the first delivery channel away from the distal end forms a second inlet / outlet on the outer wall of the delivery tube; the second delivery channel near the distal end forms a third inlet / outlet on the outer wall of the delivery tube, the second inlet / outlet being located on the side of the balloon away from the distal end, and the second delivery channel away from the distal end forms a fourth inlet / outlet on the outer wall of the delivery tube.

10. The laser lithotripsy system according to claim 8, characterized in that, The sealing assembly is configured as a stone-collecting mesh, and includes an elastic guide wire and a delivery tube. The delivery tube passes through one of the channels and has a first delivery channel and a second delivery channel. One end of the first delivery channel forms a first inlet / outlet on the end face of the delivery tube near the distal end, and the other end of the first delivery channel away from the distal end forms a second inlet / outlet on the outer wall of the delivery tube. The other end of the second delivery channel near the distal end forms a third inlet / outlet on the outer wall of the delivery tube, and the other end of the second delivery channel away from the distal end forms a fourth inlet / outlet on the outer wall of the delivery tube. The elastic guide wire is inserted into the first delivery channel, and the elastic guide wire has a pre-shaped section, which is close to the distal end; wherein, when the pre-shaped section is unrestricted, the pre-shaped section is configured to recover its deformation to a preset interception structure.

11. The laser lithotripsy system according to claim 10, characterized in that, The preset interception structure is an interception net, which is configured to be a spiral shape that either contracts or expands.

Images