Treatment device and treatment system

Abstract

The utility model belongs to the technical field of medical instruments. The embodiment of the utility model provides a treatment device and a treatment system. Comprising a mesh basket assembly, the mesh basket assembly comprises a mesh basket body and an inner pipe which are connected in sequence, the mesh basket body and the inner pipe are provided with penetrating holes, and guide wires penetrate through the penetrating holes so that the mesh basket assembly can reach target tissue along the guide wires; the outer pipe is movably arranged on the mesh basket assembly in a sleeving mode, and the inner pipe can axially move relative to the outer pipe so that the mesh basket body can stretch out of or retract into the outer pipe; wherein the outer tube and / or the inner tube are / is provided with a liquid injection part, and the liquid injection part is configured to convey liquid to the far end of the treatment device. According to the device, the function of integrating radiography, flushing, calculus removal and guide wire placement can be achieved, meanwhile, the operation complexity and the instrument cost are reduced, and the treatment efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a treatment device and a treatment system. Background Art

[0002] For a long time, appendectomy has been the standard treatment strategy for acute appendicitis. This is especially true for the treatment of children's appendix. Because the structural characteristics of the pediatric appendix are different from those of adults, it is prone to fecal stone impaction and is extremely prone to perforation due to inflammation and infection. Therefore, the treatment of pediatric appendicitis is mainly based on surgical resection. However, the appendix is ​​an immune organ, especially for children and adolescents. With the deepening of minimally invasive concepts and the development of technology, more and more organs are being preserved and spared from resection. Current minimally invasive surgical procedures for appendicitis include laparoscopic appendectomy and natural orifice appendectomy. However, almost all procedures involve appendectomy.

[0003] With the continuous advancement of digestive endoscopy, some appendicitis lesions no longer require surgical resection. Currently, non-invasive procedures for appendicitis treatment include endoscopic retrograde appendicitis therapy (ERAT). This procedure involves using a colonoscope to pass through the anus and retrograde to the ileocecal region to explore the appendix opening. Endoscopic auxiliary tools such as guidewires, catheters, stone removal balloons, and plastic stents are used to relieve obstruction in the appendix cavity, thus achieving a new minimally invasive technique for treating appendicitis while preserving the appendix.

[0004] However, the current ERAT procedure requires multiple instrument exchanges (for example, angiography cannulae are required during angiography, flushing cannulae are required during flushing, and stone removal cannulae are required for fecal stone removal), which results in complicated operations and high instrument costs (disposable instruments are used multiple times). Utility Model Content

[0005] The embodiments of the present application provide a treatment device and a treatment system that can integrate the functions of angiography, flushing, stone removal and guide wire insertion, thereby helping to reduce operational complexity and improve treatment efficiency.

[0006] According to a first aspect of an embodiment of the present application, a treatment device is provided for treating a target tissue, comprising:

[0007] A basket assembly, the basket assembly comprising a basket body and an inner tube connected in sequence, the basket body and the inner tube being configured with perforations for a guide wire to pass through, so that the basket assembly reaches the target tissue along the guide wire;

[0008] An outer tube, the outer tube being movably sleeved on the basket assembly, and the inner tube being capable of axially moving relative to the outer tube so as to extend or retract the basket body into or into the outer tube;

[0009] Wherein, the outer tube and / or the inner tube is provided with a liquid injection portion, and the liquid injection portion is configured to transport liquid to the distal end of the treatment device.

[0010] In a feasible implementation, the liquid injection portion includes a liquid injection cavity formed between the outer tube and the inner tube, and the liquid in the liquid injection cavity flows out from at least the distal end of the outer tube to the target tissue.

[0011] In a feasible implementation, the basket assembly further includes a flexible head, and the flexible head is provided at the distal end of the basket body;

[0012] The flexible head is configured with a through hole, and the through hole is used for the guide wire to pass through.

[0013] In a feasible implementation, the basket body includes a basket core and a flexible tube of a preset length, the distal end of the flexible tube is connected to the basket core, and the proximal end of the flexible tube is connected to the distal end of the inner tube.

[0014] In a feasible implementation, the basket assembly further includes a display mark, which is provided at the basket core and is configured to display the position of the basket core.

[0015] In a feasible implementation, the development mark includes a first development portion and a second development portion, the first development portion is located at the distal end of the basket core, and the second development portion is located at the proximal end of the basket core.

[0016] In a feasible implementation, the first developing portion is disposed between the flexible head and the basket core;

[0017] Alternatively, the first developing portion is formed on the flexible head, and the flexible head is fixedly connected to the basket core.

[0018] In a feasible implementation, the basket core includes a plurality of basket wires, at least one of the basket wires includes a monofilament segment and a double-filament segment connected in sequence, and the double-filament segment is located at the distal end of the basket core.

[0019] In a feasible implementation, a first connection portion is provided at the distal end of the basket core, and the first connection portion is used to connect to a functional component located at the distal end of the basket body; a second connection portion is provided at the proximal end of the flexible tube, and the second connection portion is used to connect to the inner tube.

[0020] In a feasible implementation, the distal side wall of the outer tube is configured with at least one opening, and the opening is used to allow the liquid in the injection cavity to flow out.

[0021] In a feasible implementation, the outer tube includes a distal tube and a proximal tube sequentially arranged along the extension direction, and the outer diameter of the distal tube is smaller than the outer diameter of the proximal tube.

[0022] In a feasible implementation, the treatment device further includes:

[0023] a first operating part connected to the outer tube and used for dynamically sealing the liquid injection channel, the first operating part being configured with a liquid injection hole for delivering liquid to the liquid injection channel;

[0024] The proximal end of the inner tube passes through the first operating part and is connected to the second operating part. The second operating part is used to drive the inner tube to move relative to the outer tube and guide the guide wire into the inner tube.

[0025] In a feasible implementation, the second operating part includes a guidewire connector and a booster tube. The guidewire connector is provided at the proximal end of the booster tube. The booster tube is configured with a cavity for the guidewire to pass through.

[0026] According to a second aspect of the embodiments of the present application, a treatment system is provided, comprising a guide wire and the treatment device described in the above embodiments, wherein the guide wire is movable relative to the treatment device;

[0027] The distal end of the guide wire is configured to extend into the target tissue, and the treatment device reaches the target tissue along the guide wire.

[0028] In a feasible implementation, the guide wire is disposed in the treatment device, and the guide wire can move synchronously with the treatment device.

[0029] The therapeutic device and treatment system provided in the embodiments of the present application utilize a perforation constructed in the basket assembly (including the basket body and inner tube) to facilitate passage of a guidewire through the perforation to the target tissue. Subsequently, the outer tube and the basket assembly are movably arranged so as to not only retract and extend the basket body relative to the outer tube, facilitating movement of the basket assembly to the target tissue for stone removal, but also utilize the perforation in the inner tube, or the gap between the outer and inner tubes, to form a liquid injection portion, facilitating the injection of external liquids such as contrast agents or flushing agents into the target tissue. This therapeutic device integrates the functions of imaging, flushing, stone removal, and guidewire insertion, while reducing operational complexity and device costs and improving treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 is a schematic diagram of the overall structure of a treatment device provided according to an embodiment of the present application;

[0032] Figure 2 is a front view structural schematic diagram of a treatment device provided according to an embodiment of the present application;

[0033] Figure 3 is a structural diagram of an exemplary lower basket assembly provided according to an embodiment of the present application;

[0034] Figure 4 is a structural schematic diagram of another exemplary lower basket assembly provided according to an embodiment of the present application;

[0035] Figure 5 is a structural diagram of a basket body provided according to an embodiment of the present application;

[0036] Figure 6 It is a schematic diagram of the partial structure of the outer tube provided according to an embodiment of the present application.

[0037] Reference numerals:

[0038] 100, basket assembly; 110, basket body; 112, basket core; 1121, basket wire; 1121-1, single-wire segment; 1121-2, double-wire segment; 114, flexible tube; 116, first connecting portion; 118, second connecting portion; 120, inner tube; 130, developing mark; 131, first developing portion; 132, second developing portion; 140, flexible head;

[0039] 200, outer tube; 201, opening; 210, distal tube; 220, proximal tube;

[0040] 300, guide wire;

[0041] 400, first operating handle; 410, liquid injection hole;

[0042] 500, second operating handle; 510, guidewire connector; 520, booster tube. DETAILED DESCRIPTION

[0043] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0046] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0048] Before introducing the treatment device of the embodiment of the present application, at least one application scenario thereof will be explained. The treatment device of the present application can be used in endoscopic retrograde appendicitis treatment. When the endoscope is retrograded through the anus to the ileocecal region to explore the opening of the appendix, the treatment device of the present application can be extended into the appendix through the auxiliary channel in the endoscope to relieve the obstruction of the appendix cavity, thereby achieving the purpose of treating appendicitis while preserving the appendix. Of course, the treatment device provided by the present application is not limited to the treatment of appendicitis, but can also be used for other human tissues treated by the treatment device, and this is not limited here.

[0049] Figure 1 is a schematic diagram of the overall structure of a treatment device provided according to an embodiment of the present application; Figure 2 Schematic diagram of the front view of the treatment device provided in accordance with the embodiment of the present application. Figure 1 and Figure 2 As shown, an embodiment of the present application first provides a treatment device for treating a target tissue. The treatment device may include a basket assembly 100 and an outer tube 200 .

[0050] The basket assembly 100 includes a basket body 110 and an inner tube 120 connected in sequence. The basket body 110 and the inner tube 120 are configured with perforations, and the perforations are used for the guide wire 300 to pass through so that the basket assembly 100 reaches the target tissue along the guide wire 300; the outer tube 200 is movably mounted on the basket assembly 100, and the inner tube 120 can move axially relative to the outer tube 200 so that the basket body 110 extends or retracts into the outer tube 200; wherein, the outer tube 200 and / or the inner tube 120 are provided with a liquid injection portion, and the liquid injection portion is configured to deliver liquid to the distal end of the treatment device.

[0051] It can be understood that in this example, the target tissue is the appendix. In order to achieve one-time intubation, imaging, flushing, fecal stone collection, and possible insertion of a guide wire 300 in the appendix, this example first provides a basket assembly 100, which can collect larger fecal stones in the appendix, and the basket assembly 100 is specifically perforated in the basket body 110 and the inner tube 120 to facilitate the guide wire 300 to pass through the perforation from the outside into the appendix; and an injection part is provided between the outer tube 200 sleeved outside the basket assembly 100, the inner tube 120 of the basket assembly 100, or the outer tube 200 and the inner tube 100. The provision of the injection part is conducive to the contrast agent or flushing agent being transported to the distal end of the treatment device to flow into the appendix.

[0052] For example, before entering the appendix, the basket body 110 and inner tube 120 are both located within the outer tube 200, allowing them to pass through the endoscope's cannula channel along with the outer tube 200 and exit through the endoscope's distal end (appendix access attachment) into the appendix. This process, of course, requires the prior placement of a guidewire 300 into the appendix, facilitating the introduction of the basket assembly 100, inner tube 120, and outer tube 200 over the guidewire 300 into the appendix.

[0053] Exemplarily, there are two ways to introduce the treatment device into the appendix along the guidewire 300. One is to use a guidewire 300 pre-placed through the endoscope intubation channel (a guidewire 300 may have been placed prior to surgery). The other is to allow the guidewire 300 to reach the appendix entrance along with the basket assembly 100 and outer tube 200 (the guidewire 300 is pre-placed in the treatment device). The guidewire 300 is then pushed into the appendix, and finally the basket assembly 100 and outer tube 200 are guided into the appendix via the guidewire 300. After the distal ends of the basket assembly 100 and outer tube 200 are guided into the appendix, the guidewire 300 is withdrawn.

[0054] Because basket assembly 100 and outer tube 200 are movably coupled, basket assembly 100 can be moved axially relative to outer tube 200 under external force until basket body 110 is ejected from outer tube 200. Once ejected, basket body 110 releases the force and expands into a net-like shape that facilitates the extraction of fecal stones. Basket body 110 is primarily used to extract fecal stones from the appendix and facilitate their expulsion into the extraappendicular lumen. This process requires the use of imaging to determine the position of the fecal stones and basket body 110.

[0055] In this example, the injection portion can be a perforation formed between the inner tube 120 and the basket body 110. More specifically, the perforation can be either with or without a guidewire. If a guidewire is included, the injection portion is the injection lumen formed between the perforation and the guidewire; if a guidewire is not included, the entire perforation serves as the injection lumen. Alternatively, the injection portion can be an infusion tube disposed within the inner tube 120 or outer tube 200. The infusion tube moves with the treatment device, thereby transporting external fluid into the appendix.

[0056] Of course, in addition to the above structure, the injection part can also be, in one example, a liquid injection cavity formed between the outer tube 200 and the inner tube 120, and the liquid in the liquid injection cavity flows out from at least the distal end of the outer tube 200 to the target tissue.

[0057] The above-mentioned imaging step requires the injection of a contrast agent into the appendix. The contrast agent can be injected externally into the injection channel so that the contrast agent flows along the injection channel from the distal end of the outer tube 200 into the appendix, thereby imaging the inner lumen of the appendix to determine whether there are still large fecal stones stuck in the appendix. In addition, the injection channel can also serve as a transmission channel for flushing agents. Flushing agents, such as saline, enter the appendix through the injection channel and can flush pus and smaller fecal stones out of the appendix.

[0058] It should be noted that operating handles can be provided at the proximal ends of the basket assembly 100 and the outer tube 200 to facilitate control of the extension or retraction of the basket body 110 relative to the outer tube 200, or to facilitate the injection of contrast agent or flushing agent from the interface of the operating handle. The specific structure of the operating handle is exemplified below.

[0059] In this application, a perforation is constructed in the basket assembly 100 (comprising the basket body 110 and inner tube 120) to facilitate passage of a guidewire 300 through the perforation to the target tissue. Subsequently, the outer tube 200 and the basket assembly 100 are movably arranged so as to not only retract and extend the basket body 110 relative to the outer tube 200, facilitating movement of the basket assembly 100 to the target tissue for stone removal, but also utilize the gap between the outer tube 200 and the inner tube 120 to form an injection channel, facilitating the injection of external contrast agents, flushing agents, and other liquids into the target tissue. This treatment device integrates the functions of imaging, flushing, stone removal, and guidewire 300 insertion, while reducing operational complexity and device costs, thereby improving treatment efficiency.

[0060] Below, we will combine the Figure 1 -Attached Figure 6 The specific structure of the treatment device provided in the embodiment of the present application is described in detail.

[0061] Figure 3 Schematic diagram of the structure of the basket assembly provided according to the embodiment of the present application. Figure 3 As shown, in some embodiments, the basket body 110 includes a basket core 112 and a flexible tube 114 of a preset length, wherein the distal end of the flexible tube 114 is connected to the basket core 112 , and the proximal end of the flexible tube 114 is connected to the distal end of the inner tube 120 .

[0062] Specifically, a section of flexible tube 114 is connected to the proximal end of the basket core 112. The provision of the flexible tube 114 can improve the bending performance of the distal end of the entire treatment device, so as to facilitate rapid and accurate access to the appendix. For example, the flexible tube 114 can be a hypotube 114. Of course, it can also be other pipes with higher elasticity, which are not limited here. It should be noted that the length of the flexible tube 114 can be set according to the length required to be bent during the actual treatment process, which is not specifically limited here. In addition, in order to enhance the connection reliability between the basket core 112 and the flexible tube 114, the basket core 112 and the flexible tube 114 can be formed into one piece; of course, the connection between the basket core 112 and the flexible tube 114 can also be achieved by welding, bonding, bolting, etc., which are not specifically limited here. The basket core 112 is the main structure for collecting fecal stones, and its position in the appendix is ​​accurately displayed, thereby accurately collecting fecal stones.

[0063] In some embodiments, the basket assembly 100 may further include a display mark 130 , which is disposed at the basket core 112 . The display mark 130 is configured to display the position of the basket core 112 .

[0064] Specifically, the imaging marker 130 can be a polymer material containing a developing component (e.g., tungsten powder, barium sulfate, etc.). The imaging marker 130 can be formed on the structure of the basket core 112, thereby clearly indicating the position of the basket core 112 within the appendix. Of course, considering the feasibility of manufacturing and the structural strength of the basket core 112, the imaging marker 130 can be placed at one or both ends of the basket core 112. For example, the imaging marker 130 can be a developing ring, which can be placed only at the distal end, the proximal end, or both ends of the basket core 112. The specific placement of the developing ring can be determined based on the actual morphology of the target tissue and is not limited here.

[0065] In one example, the development mark 130 includes a first development portion 131 and a second development portion 132 . The first development portion 131 is located at the distal end of the basket core 112 , and the second development portion 132 is located at the proximal end of the basket core 112 .

[0066] Specifically, the second developing portion 132 may be a developing ring, which may be sleeved on the distal end of the flexible tube 114. In this example, there are two ways to configure the first developing portion 131:

[0067] Method 1

[0068] The first developing part 131 can be connected to the basket core 112 as a physical part. Figure 3As shown, in one example, a first developing portion 131 is disposed between the flexible head 140 and the basket core 112. The first developing portion 131 may be a developing ring. The developing ring is typically made of a material with specific physical properties, such as platinum-iridium or tantalum. The developing ring can clearly identify and locate the basket core 112 and the appendix cavity through imaging such as X-rays, thereby improving the success rate of treatment.

[0069] To avoid or slow down the damage of the surface mucosa caused by the imaging ring when entering the appendix, Figure 3 As shown, in one example, the basket assembly 100 may further include a flexible head 140, which is disposed at the distal end of the basket body 110. Specifically, the flexible head 140 may be made of a polymer material having a soft property to avoid or reduce damage to the cavity mucosa.

[0070] In one example, the flexible head 140 is configured with a through-hole for passing the guide wire 300. For example, the through-hole configured in the flexible head 140 is coaxially arranged with the perforation in the above example, so that the guide wire 300 passes through the perforation and the through-hole in sequence into the appendix.

[0071] Method 2

[0072] Figure 4 is a structural diagram of another exemplary lower basket assembly provided according to an embodiment of the present application, such as Figure 4 As shown, in some embodiments, the first developing portion 131 is formed on a flexible head 140, which is fixedly connected to the basket core 112. Specifically, the flexible head 140 can be made of a polymer material containing a developing component (e.g., tungsten powder, barium sulfate, etc.), so that the flexible head 140 has both developing and soft properties, thereby reducing the number of functional components disposed at the distal end of the basket body 110. In other words, the volume of the basket assembly 100 is reduced, making it easier to enter the appendix lumen for treatment.

[0073] It should be noted that the flexible head 140 in the above two methods can be designed as a conical structure. The large end of the conical flexible head 140 is connected to the basket core 112, and the small end is more convenient for guiding the treatment device into the appendix.

[0074] Figure 5 This is a schematic diagram of the structure of the basket body provided according to an embodiment of the present application. Figure 3 and Figure 5 As shown, in order to collect as many smaller fecal stones as possible, in some embodiments, the basket core 112 includes multiple basket wires 1121, and at least one basket wire 1121 includes a single wire segment 1121-1 and a double wire segment 1121-2 connected in sequence, and the double wire segment 1121-2 is located at the distal end of the basket core 112.

[0075] For example, the basket core 112 may be provided with three, four, or more basket wires 1121, and the multiple basket wires 1121 are sequentially spaced around the central axis of the basket core 112 to form a net bag shape, which is conducive to collecting fecal stones. For example, fecal stones can be collected into the inner cavity of the net bag-shaped basket core 112. In this example, one basket wire 1121 is designed to have a single-wire to double-wire structure, that is, the double-wire segment 1121-2 is located at the distal end of the basket core 112, making the basket wire 1121 structure at the distal end of the basket core 112 more dense. On the one hand, it is more conducive to collecting small fecal stones, and on the other hand, it can prevent the fecal stones from falling out when being dragged out of the appendix.

[0076] It should be noted that in this example, all the basket wires 1121 can be designed as a single-wire-to-double-wire structure. In addition, the basket core 112 can be made of nickel-titanium alloy material, and the manufacturing process can be a tubular structure carving heat treatment molding process, but there is no specific limitation.

[0077] like Figure 5 As shown, in some embodiments, a first connection portion 116 is provided at the distal end of the basket core 112, and the first connection portion 116 is used to connect to the functional parts located at the distal end of the basket body 110; a second connection portion 118 is provided at the proximal end of the flexible tube 114, and the second connection portion 118 is used to connect to the inner tube 120.

[0078] It is understood that to facilitate connection of functional components (such as the flexible head 140 or the developing ring 131 in the above-mentioned examples) at the distal end of the basket core 112, a first connecting portion 116 is provided at the distal end of the basket core 112. This first connecting portion 116 can be understood as a connecting shaft. The connecting shaft is configured as a hollow structure to facilitate the passage of the guidewire 300. The connecting shaft may also be provided with one or more fixing holes or fixing grooves to facilitate the quick installation of functional components such as the flexible head 140 or the developing ring 131 on the connecting shaft.

[0079] Similarly, the second connecting portion 118 provided at the proximal end of the flexible tube 114 facilitates connection with the end of the inner tube 120. The second connecting portion 118 can be a fixing hole or a fixing groove directly formed at the end of the flexible tube 114. The end of the inner tube 120 can be provided with an adaptive buckle to achieve quick and secure installation between the flexible tube 114 and the inner tube 120.

[0080] Figure 6 Schematic diagram of the partial structure of the outer tube provided in accordance with the embodiment of the present application. Figure 6 As shown, in some embodiments, the distal side wall of the outer tube 200 is configured with at least one opening 201 , and the opening 201 is used to allow the liquid in the injection cavity to flow out.

[0081] Specifically, the liquid in the injection cavity can flow out along the distal end of the outer tube 200. To improve the outflow efficiency of the liquid in the injection cavity, one or more openings 201 can be formed on the sidewall of the distal end of the outer tube 200 to facilitate the outflow of contrast agents or flushing agents in the injection cavity to the appendix, thereby improving the treatment efficiency of the appendix. For example, the multiple openings 201 are distributed at intervals along the circumference of the outer tube 200.

[0082] like Figure 6 As shown, in some embodiments, the outer tube 200 includes a distal tube 210 and a proximal tube 220 sequentially arranged along the extension direction, and the outer diameter of the distal tube 210 is smaller than the outer diameter of the proximal tube 220 .

[0083] Specifically, outer tube 200 is divided into two parts for description. The distal portion is referred to as distal tube 210, and the proximal portion is referred to as proximal tube 220. Distal tube 210 has a smaller outer diameter. Specifically, the distal portion of outer tube 200 is designed as a thinner-walled tube to improve the bending performance of the distal portion, further facilitating entry of outer tube 200 into the appendix lumen. The length ratio of distal tube 210 to proximal tube 220 should be determined based on the desired bending length of distal tube 210 during actual treatment and is not specifically limited herein.

[0084] In order to facilitate the relative movement of the basket assembly 100 and the outer tube 200, the injection of liquid into the injection channel, and the passage of the guide wire 300 through the basket assembly 100, as shown in FIG. Figure 1 and Figure 2 As shown, in some embodiments, the treatment device may further include a first operating portion and a second operating portion. The first operating portion is connected to the outer tube 200 and is used to dynamically seal the injection channel. The first operating portion is configured with an injection hole 410 for delivering liquid to the injection channel. The proximal end of the inner tube 120 passes through the first operating portion and is connected to the second operating portion. The second operating portion is used to drive the inner tube 120 to move relative to the outer tube 200 and guide the guide wire 300 into the inner tube 120.

[0085] Specifically, the first operating portion, such as the first operating handle 400, is configured with a through hole to facilitate the inner tube 120 to pass through the through hole into the outer tube 200. The first operating handle 400 is sealedly connected to the proximal end of the outer tube 200. When the basket body 110 is extended or retracted into the outer tube 200, the inner tube 120 moves relative to the outer tube 200, and at the same time, the inner tube 120 also moves relative to the first operating handle 400.

[0086] To prevent the liquid in the injection cavity from flowing out of the first operating handle 400, a sealing member such as a rubber ring can be set in the through hole of the first operating handle 400, which can not only realize the movement of the first operating handle 400 relative to the inner tube 120, but also dynamically seal the injection cavity.

[0087] For example, the first operating handle 400 can be a Y-shaped connector, which is convenient for hand-holding, and a branch of the Y-shaped connector has an injection hole 410 to facilitate the injection of liquids such as contrast agents and flushing agents into the injection cavity.

[0088] In addition, the second operating part, such as the second operating handle 500, is located on the proximal side of the first operating handle 400, and the second operating handle 500 is fixedly connected to the proximal end of the inner tube 120. The second operating handle 500 is also constructed with a through hole to facilitate the guide wire 300 to enter the inner tube 120 through the through hole.

[0089] In some embodiments, the second operating part includes a guidewire connector 510 and a booster tube 520 . The guidewire connector 510 is disposed at the proximal end of the booster tube 520 . The booster tube 520 is configured with a cavity for the guidewire 300 to pass through.

[0090] Specifically, the booster tube 520 is fixedly connected to the inner tube 120 and is provided with a gripping block for convenient hand-held force application. A guidewire connector 510 is also mounted at the proximal end of the booster tube 520 to guide the guidewire 300 into the inner tube 120. The cavity within the booster tube 520 can be configured to accommodate the inner tube 120, allowing the guidewire 300 to pass directly into the inner tube 120 from the guidewire connector 510. Alternatively, the distal end of the booster tube 520 is connected to the inner tube 120, allowing the guidewire 300 to pass through the cavity from the guidewire connector 510 before entering the inner tube 120.

[0091] It should be noted that the inner tube 120 in this example is a hollow single-lumen tube structure made of polymer material, and can be connected to the flexible tube 114 and the second operating handle 500 by hot melting, bonding, etc.

[0092] During use, the first operating handle 400 can be relatively fixed (for example, held by hand or fixed by a fixed platform), and the second operating handle 500 is pushed. The second operating handle 500 will drive the inner tube 120 and the basket body 110 to continue to move toward the distal end until the basket body 110 is pushed out of the outer tube 200, so that the basket body 110 can be used to collect fecal stones in the appendix.

[0093] An embodiment of the present application also provides a treatment system, which may include a guide wire 300 and the treatment device in the above embodiment, wherein the guide wire 300 can move relative to the treatment device; the distal end of the guide wire is configured to extend into the target tissue, and the treatment device reaches the target tissue along the guide wire.

[0094] In one example, the guidewire 300 is disposed within the treatment device, and the guidewire 300 can move synchronously with the treatment device.

[0095] It is understood that during treatment, the distal end of the endoscope can be moved to the entrance of the appendix through the natural cavity. Then, the treatment device and the guide wire 300 therein (the guide wire 300 is pre-installed in the treatment device) can be moved together along the intubation channel of the endoscope to the entrance of the appendix. Then, the guide wire 300 is pre-entered into the inner cavity of the appendix. The treatment device is guided by the guide wire 300 into the appendix. The guide wire 300 is then withdrawn, and finally, the appendix is ​​treated (including flushing, stone removal, etc.) using the treatment device. The specific structure of the treatment device can be understood with reference to the above example and will not be described in detail here.

[0096] Finally, it should be noted that the above embodiments are intended only to illustrate the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions of the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application and are intended to be encompassed by the claims of the present application.

Claims

1. A treatment device for treating a target tissue, characterized in that: include: A basket assembly, the basket assembly comprising a basket body and an inner tube connected in sequence, the basket body and the inner tube being configured with perforations for a guide wire to pass through, so that the basket assembly reaches the target tissue along the guide wire; An outer tube, the outer tube being movably sleeved on the basket assembly, and the inner tube being capable of axially moving relative to the outer tube so as to extend or retract the basket body into or into the outer tube; Wherein, the outer tube and / or the inner tube is provided with a liquid injection portion, and the liquid injection portion is configured to transport liquid to the distal end of the treatment device.

2. The treatment device according to claim 1, characterized in that The liquid injection portion includes a liquid injection cavity formed between the outer tube and the inner tube, and the liquid in the liquid injection cavity flows out from at least the distal end of the outer tube to the target tissue.

3. The therapeutic device according to claim 2, characterized in that The basket assembly further includes a flexible head, which is disposed at the distal end of the basket body; The flexible head is configured with a through hole, and the through hole is used for the guide wire to pass through.

4. The treatment device according to claim 3, characterized in that The basket body includes a basket core and a flexible tube of a preset length. The distal end of the flexible tube is connected to the basket core, and the proximal end of the flexible tube is connected to the distal end of the inner tube.

5. The treatment device according to claim 4, characterized in that The basket assembly further includes a display mark, which is disposed at the basket core and configured to display the position of the basket core.

6. The treatment device according to claim 5, characterized in that The developing mark includes a first developing portion and a second developing portion, wherein the first developing portion is located at the distal end of the basket core, and the second developing portion is located at the proximal end of the basket core.

7. The therapeutic device according to claim 6, characterized in that The first developing portion is disposed between the flexible head and the basket core; Alternatively, the first developing portion is formed on the flexible head, and the flexible head is fixedly connected to the basket core.

8. The therapeutic device according to any one of claims 4 to 7, characterized in that The basket core includes a plurality of basket wires, at least one of the basket wires includes a monofilament segment and a double-filament segment connected in sequence, and the double-filament segment is located at the distal end of the basket core.

9. The therapeutic device according to any one of claims 4 to 7, characterized in that The distal end of the basket core is provided with a first connection portion, which is used to connect to the functional component located at the distal end of the basket body; the proximal end of the flexible tube is provided with a second connection portion, which is used to connect to the inner tube.

10. The treatment device according to any one of claims 2 to 7, characterized in that The distal side wall of the outer tube is configured with at least one opening, and the opening is used to allow the liquid in the liquid injection cavity of the liquid injection part to flow out.

11. The treatment device according to claim 10, characterized in that The outer tube includes a distal tube and a proximal tube sequentially arranged along an extending direction, and the outer diameter of the distal tube is smaller than the outer diameter of the proximal tube.

12. The therapeutic device according to any one of claims 2 to 7, characterized in that The therapeutic device further comprises: a first operating part connected to the outer tube and used for dynamically sealing the liquid injection channel, the first operating part being configured with a liquid injection hole for delivering liquid to the liquid injection channel of the liquid injection part; The proximal end of the inner tube passes through the first operating part and is connected to the second operating part. The second operating part is used to drive the inner tube to move relative to the outer tube and guide the guide wire into the inner tube.

13. The therapeutic device according to claim 12, characterized in that The second operating part includes a guidewire connector and a booster tube. The guidewire connector is provided at the proximal end of the booster tube. The booster tube is configured with a cavity for the guidewire to pass through.

14. A therapeutic system, characterized in that comprising a guide wire and the therapeutic device according to any one of claims 1 to 13, wherein the guide wire is movable relative to the therapeutic device; The distal end of the guide wire is configured to extend into the target tissue, and the treatment device reaches the target tissue along the guide wire.

15. The treatment system according to claim 14, characterized in that The guide wire is disposed in the treatment device, and the guide wire can move synchronously with the treatment device.

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