Drainage tube conveying device and endoscope equipment

Abstract

The utility model discloses a drainage tube conveying device and endoscope equipment, and belongs to the technical field of medical instruments.In the drainage tube conveying device, an electrode assembly is connected to the far end of a catheter, and a drainage tube body is arranged on the periphery of the catheter in a relatively movable and sleeving mode; the electrode assembly can be switched between the unfolded state and the contracted state, so that the electrode assembly can establish a channel through target tissue in the unfolded state, and after the drainage tube body arranged on the periphery of the catheter in a sleeving mode is fed into the target tissue, the electrode assembly can be contracted into an inner cavity of the drainage tube body; and the drainage tube body is withdrawn through the inner cavity of the drainage tube body, so that the drainage tube body is left in the target tissue. The electrode and the drainage tube do not need to be operated in a split mode in a traditional operation, exchange of two instruments is avoided, and therefore the problems of tissue fluid leakage and positioning deviation caused by instrument exchange can be avoided, the risk of operation failure is remarkably reduced, and the safety and success rate of the operation are improved.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, and in particular relates to a drainage tube delivery device and an endoscope. Background Technology

[0002] In endoscopic surgery, electrodes are used to introduce current through electrosurgical devices to create channels in target tissues or perform hemostasis, while drainage tubes are used to drain or maintain the patency of these channels. During the procedure, instrument exchanges are necessary, and the combined use of two types of instruments increases the risk of tissue fluid leakage and surgical failure. Utility Model Content

[0003] This application provides a drainage tube delivery device and an endoscope, which can reduce the exchange of instruments during surgery, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a drainage tube delivery device is provided, comprising:

[0005] The catheter has a proximal end and a distal end;

[0006] The drainage tube body is sleeved on the outside of the catheter and can move relative to it;

[0007] An electrode assembly is connected to the distal end and is capable of contracting or expanding radially, wherein the radial dimension of the electrode assembly in the contracted state is smaller than that in the expanded state.

[0008] The electrode assembly is configured to be movable within the inner cavity of the drainage tube body when in the contracted state;

[0009] The electrode assembly is also configured to detach from the drainage tube body and be in the deployed state.

[0010] In some embodiments, the electrode assembly includes:

[0011] The electrode body is configured to deform so that the electrode assembly switches between the contracted state and the expanded state.

[0012] In some embodiments, the electrode body is configured to be elastic;

[0013] When the drainage tube body moves toward the distal end, its inner cavity can squeeze the electrode body, causing the electrode body to undergo elastic deformation, so that the electrode assembly switches to the contracted state.

[0014] When the drainage tube body moves toward the proximal end, the electrode body can detach from the drainage tube body, so that the electrode assembly switches to the deployed state.

[0015] In some embodiments, the electrode assembly further includes:

[0016] A fastener is connected to the conduit, and the fastener is provided with an assembly hole;

[0017] The electrode body includes a blade and a contact part connected together. The blade is located on the side of the fixing member away from the conduit, and the contact part passes through the assembly hole.

[0018] In some embodiments, the fixation member is provided with a first guidewire channel, which is connected to the catheter.

[0019] In some embodiments, the fixing member has a clearance groove on the side away from the conduit, and in the unfolded state, at least a portion of the blade is located within the clearance groove.

[0020] In some embodiments, the fastener includes an insertion portion disposed within the conduit, the surface of which is provided with a limiting protrusion.

[0021] In some embodiments, the electrode assembly includes at least two electrode bodies, which are disposed at different positions in the circumferential direction of the fixture.

[0022] In some embodiments, the cutter head is any one or a combination of curved segment a, straight segment b, and broken segment c.

[0023] In some embodiments, the electrode body includes:

[0024] The base is connected to the conduit;

[0025] At least two bends are provided on the side of the base away from the conduit and connected to different positions in the circumferential direction of the base;

[0026] An extension is connected to the side of the bend away from the conduit;

[0027] When the extension is far from the base, the bent portion can contract radially inward; when the extension is close to the base, the bent portion can expand radially outward.

[0028] In some embodiments, the electrode body has a central axis;

[0029] From one end of the bend to the other end, the radial distance between the bend and the central axis first increases and then decreases.

[0030] In some embodiments, the bent portion extends in a spiral shape.

[0031] In some embodiments, the bent portion is compressed by the drainage tube body, which causes it to retract radially inward and move the extension portion away from the base.

[0032] In some embodiments, the electrode body is provided with a second guidewire channel, which extends through the base and the extension and communicates with the conduit.

[0033] In some embodiments, the electrode assembly further includes:

[0034] A guide member is fixedly connected to the base and / or the catheter and passes through the base and the extension. The guide member and the extension are movable relative to each other. The guide member is provided with a third guidewire channel communicating with the catheter.

[0035] In some embodiments, it also includes:

[0036] The core rod is movably inserted into the conduit and the base and connected to the extension. The core rod is configured to move the extension away from or towards the base. The core rod is provided with a fourth guidewire channel.

[0037] In some embodiments, the base and / or the extension are provided with a developing structure.

[0038] In some embodiments, the electrode body further includes:

[0039] The cutting head is connected to the extension.

[0040] In some embodiments, it also includes:

[0041] A guidewire is used to pass through the drainage tube body and the catheter.

[0042] In some embodiments, the drainage tube body includes:

[0043] The tapering section has a gradually decreasing outer diameter along the direction from the proximal end to the distal end.

[0044] According to a second aspect of this application, an endoscope device is provided, including a drainage tube delivery device as described in any of the above embodiments.

[0045] In the drainage tube delivery device of this application embodiment, by connecting the electrode assembly to the distal end of the catheter, the drainage tube body can be relatively movably fitted around the periphery of the catheter, and the electrode assembly can switch between an extended state and a retracted state. This achieves at least the following technical effects: reducing or even eliminating the risk of tissue fluid leakage due to instrument exchange. Specifically, in the extended state, the electrode assembly can establish a channel through the target tissue. After the drainage tube body fitted around the periphery of the catheter is inserted into the target tissue, the electrode assembly can retract into the inner lumen of the drainage tube body and be withdrawn through the inner lumen of the drainage tube body, thereby leaving the drainage tube body in the target tissue. This eliminates the need for separate operation of the electrode and drainage tube as in traditional surgery, avoiding the exchange of the two instruments. Therefore, it avoids tissue fluid leakage and positioning deviation problems caused by instrument exchange, significantly reducing the risk of surgical failure and improving the safety and success rate of the surgery.

[0046] The endoscope device of this application includes the drainage tube delivery device of the above embodiment, and therefore can have all the technical features and effects of the drainage tube delivery device, which will not be repeated here.

[0047] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of the drainage tube delivery device provided in one embodiment of this application with the electrode assembly in the deployed state;

[0050] Figure 2 yes Figure 1 A magnified schematic diagram of a portion of region A in the middle;

[0051] Figure 3 This is a distal side view of a drainage tube delivery device provided in one embodiment of this application;

[0052] Figure 4 It is along Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0053] Figure 5 yes Figure 4 A cross-sectional view of the structure in the contracted state of the electrode assembly;

[0054] Figure 6 It is along Figure 3 Schematic diagram of the cross-sectional structure of the middle BB line;

[0055] Figure 7 This is a schematic diagram of the structure of the drainage tube delivery device provided in another embodiment of this application with the electrode assembly in the deployed state;

[0056] Figure 8 yes Figure 7 A magnified schematic diagram of a portion of region B in the middle;

[0057] Figure 9 yes Figure 8 Exploded view of the parts in the medium structure;

[0058] Figure 10 This is a schematic diagram of the structure of the drainage tube delivery device provided in another embodiment of this application with the electrode assembly in the deployed state;

[0059] Figure 11 yes Figure 10 A magnified schematic diagram of a portion of region C in the middle;

[0060] Figure 12 yes Figure 10 A partial cross-sectional view of the drainage tube delivery device in the embodiment shown, with the electrode assembly in the deployed state;

[0061] Figure 13 yes Figure 10 A partial cross-sectional view of the drainage tube delivery device in the embodiment shown, with the electrode assembly in a retracted state.

[0062] Figure 14 This is a partial structural schematic diagram of the drainage tube delivery device provided in another embodiment of this application;

[0063] Figure 15 yes Figure 14 Exploded view of the parts in the medium structure;

[0064] Figure 16 This is a partial structural schematic diagram of the drainage tube delivery device provided in another embodiment of this application;

[0065] Figure 17 yes Figure 16 Side view of the middle structure;

[0066] Figure 18 This is a partial structural schematic diagram of the drainage tube delivery device provided in another embodiment of this application;

[0067] Figure 19 This is a cross-sectional view of the drainage tube delivery device provided in another embodiment of this application;

[0068] Figure 20 yes Figure 19 A magnified schematic diagram of a portion of region D in the middle;

[0069] Explanation of reference numerals in the attached figures:

[0070] 100-Cadendrium; 110-Proximal end; 120-Distal end; 200-Electrode assembly; 210-Electrode body; 211-Cutting tip; 211a-Bent section; 211b-Straight section; 211c-Folded section; 212-Electrification part; 213-Base; 214-Bent section; 215-Extension section; 216-Illumination structure; 217-Second guidewire channel; 220-Fixing member; 221-First guidewire channel; 222-Assembly hole; 223-Allowing groove; 224-Intercepting part; 225-Limiting protrusion; 230-Guide member; 231-Third guidewire channel; 300-Drainage tube body; 310-Converging section; 400-Core rod; 410-Fourth guidewire channel. Detailed Implementation

[0071] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0072] As a preamble to this application, a drainage tube delivery device is described. This drainage tube device and the electrode are two separate instruments, requiring exchange during surgery for combined use. Specifically, after the electrode is used, it is removed before the drainage tube is pushed into the target tissue. This exchange process increases the risk of tissue fluid leakage and also raises the risk of surgical failure.

[0073] In view of this, embodiments of this application provide a drainage tube delivery device that integrates electrodes and drainage tubes into one instrument, avoiding instrument exchange, reducing the risk of tissue fluid leakage and surgical failure, and improving the safety and success rate of surgery.

[0074] Please refer to the following: Figure 1 and Figure 2 The drainage tube delivery device of this application embodiment includes a conduit 100, an electrode assembly 200, and a drainage tube body 300. The electrode assembly 200 is mounted on the conduit 100, and the drainage tube body 300 is sleeved on the conduit 100 and can move relative to the conduit 100. Thus, the electrode assembly 200 can be moved relative to the drainage tube body 300 through the conduit 100.

[0075] Please combine Figure 3 and Figure 4The catheter 100 is a tubular structure with a proximal end 110 and a distal end 120. The proximal end 110 and distal end 120 are opposite ends of the catheter 100 along its axial direction (i.e., length direction), with the proximal end 110 being the end closer to the operator and the distal end 120 being the end farther from the operator. It should be noted that... Figure 4 The catheter 100 shown is only one segment of its structure, and the proximal end 110 is only a schematic label to show the relative position of the proximal end 110 and the distal end 120. The proximal end 110 specifically refers to the other end of the catheter 100 that is opposite to the distal end 120 in length.

[0076] The conduit 100 can be a polymer tube, meaning it can be made of polymer materials. Alternatively, the conduit 100 can also be a multi-layered structure, for example, it can include stacked conductive layers and insulating layers, using the conductive layers to transmit current.

[0077] Electrode assembly 200 is disposed at the distal end 120 of catheter 100. It can be connected to catheter 100 by means of heat fusion, adhesive bonding, etc., without specific limitations. Electrode assembly 200 is used for electrical connection with electrosurgical equipment, thereby allowing current to be introduced into electrode assembly 200 for operations such as establishing channels through target tissue, ablation, and hemostasis. Conductive leads can be arranged along catheter 100, with one end connected to electrode assembly 200 and the other end used for electrical connection to electrosurgical equipment. The specific connection method can refer to the current connection methods of electrode equipment, without specific limitations.

[0078] Please refer to the following: Figure 4 and Figure 5 The electrode assembly 200 can contract or expand radially, and its radial dimension in the contracted state is smaller than that in the expanded state. For example... Figure 4 As shown, in the unfolded state, the radial dimension of the electrode assembly 200 is L1; as Figure 5 As shown, in some embodiments, the electrode assembly 200 is compressed by the inner cavity of the drainage tube body 300 and becomes a contracted state, and its radial dimension is consistent with the radial dimension d of the inner cavity of the drainage tube body 300. That is, the radial dimension L1 of the electrode assembly 200 in the unfolded state is greater than the radial dimension d of the inner cavity of the drainage tube body 300.

[0079] Here, "radial dimension" specifically refers to the maximum extension distance of the electrode assembly 200 in the direction perpendicular to the axis of the catheter 100. Specifically, in the deployed state, that is, when the drainage tube body 300 moves towards the proximal end 110, the electrode assembly 200 can detach from the drainage tube body 300 and enter the deployed state. The radial dimension L is the maximum distance between the two outermost points of the electrode assembly 200 in the direction perpendicular to the axis of the catheter 100, which is L (e.g., ...). Figure 4(As shown); In the contracted state, that is, when the drainage tube body 300 moves to the distal end 120 and squeezes the electrode assembly 200, the electrode assembly 200 contracts due to the compression and can be completely contained within the inner cavity of the drainage tube body 300, entering the contracted state. At this time, its radial dimension d is consistent with the radial dimension d of the inner cavity of the drainage tube body 300 (as shown). Figure 5 (As shown).

[0080] It is understood that in some embodiments of this application, the electrode assembly 200 is fixed to the distal end 120 of the catheter 100. Through the axial relative movement mechanism between the drainage tube body 300 and the catheter 100, the electrode assembly 200 can retract into the inner cavity of the drainage tube body 300, being in a compressed state, and can also detach from the drainage tube body 300, being in an unfolded state. Therefore, the electrode assembly 200 can be moved to the outer side of the distal end of the drainage tube body 300, making it in an unfolded state, and current can be introduced in the unfolded state. The catheter 100 is used to push it to establish a channel through the target tissue, and the drainage tube body 300 is pushed into the target tissue together. Then the catheter 100 is withdrawn, driving the electrode assembly 200 to be pulled out through the inner cavity of the drainage tube body 300, leaving the drainage tube body 300 in the target tissue. This can effectively reduce the risk of tissue fluid leakage, and the simultaneous pushing can effectively avoid positioning deviation problems, significantly improving the success rate of the operation. In addition, as described above, the electrode assembly 200 can be detached from the drainage tube body 300, and therefore it is not fixedly connected to the drainage tube body 300. That is to say, the catheter 100 and the electrode assembly 200 can be removed from the drainage tube body 300, leaving only the drainage tube body 300 in the target tissue.

[0081] In some embodiments, the drainage tube body 300 may adopt a conventional tubular or mesh structure, and the material may be selected from biocompatible materials such as polymer materials, stainless steel, and nickel-titanium alloys. The distal end of the drainage tube body 300 may be provided with a tapered or sharp structure to facilitate insertion into tissue. Specifically, such as Figure 5 As shown, the drainage tube body 300 includes a tapering section 310, and the outer diameter D of the tapering section 310 gradually decreases along the direction from the proximal end 110 to the distal end 120.

[0082] In some embodiments, the electrode assembly 200 includes an electrode body 210, which is configured to be elastic and can be made of an elastic material or a shape memory alloy. When the electrode body 210 is compressed by the drainage tube body 300, it can undergo elastic deformation, causing the electrode assembly 200 to switch from an extended state to a retracted state. Figure 4 and Figure 5As shown, when the drainage tube body 300 moves relative to the conduit 100 in the X direction (i.e., from the proximal end 110 to the distal end 120), the drainage tube body 300 can contact and compress the electrode body 210, causing the electrode body 210 to undergo elastic deformation and thus contract into the inner cavity of the drainage tube body 300, becoming a contracted state. As the drainage tube body 300 continues to move relative to the conduit 100 in the X direction, the conduit 100 can pull the electrode assembly 200 out of the inner cavity of the drainage tube body 300. When the drainage tube body 300 moves relative to the conduit 100 in the opposite direction of the X direction, the conduit 100 can push the electrode assembly 200 toward the side where the distal end 120 is located, causing it to break free from the restraint of the drainage tube body 300 from that side and return to its unfolded state.

[0083] In addition to using elastic materials or shape memory alloys to make the electrode assembly 200, the electrode assembly 200 can also be set as a mechanical drive mechanism, which is activated by the compression of the drainage tube body 300.

[0084] like Figure 2 As shown, in some embodiments, the electrode assembly 200 further includes a fixing member 220, which is connected to the conduit 100, and the electrode body 210 is mounted on the fixing member 220. (Please refer to...) Figure 6 The fixing member 220 is provided with an assembly hole 222. The electrode body 210 includes a blade 211 and a current-connecting part 212 connected to each other. The blade 211 is disposed on the side of the fixing member 220 away from the conduit 100, and the current-connecting part 212 passes through the assembly hole 222 to connect with the fixing member 220. Current is delivered to the blade 211 through the current-connecting part 212 so that the blade 211 can pass through the target tissue and establish a channel. In this embodiment, the drainage tube body 300 is tilted forward by squeezing the blade 211, and the blade 211 enters the inner cavity of the drainage tube body 300.

[0085] Please refer to them again. Figure 2 and Figure 3 In some embodiments, the electrode assembly 200 includes at least two electrode bodies 210, which are disposed at different positions in the circumferential direction of the fixture 220. Figure 3 The illustrated embodiment has two electrode bodies 210, arranged approximately symmetrically about the dashed line BB. Optionally, the number of electrode bodies 210 can also be three, four, or even more.

[0086] like Figure 3 As shown, the cutter head 211 can be composed of two curved segments 211a connected in a parabolic structure. Furthermore, the cutter head 211 can take various other forms, such as annular, spiral, or mesh-like, and its material can be an elastic material or a shape memory alloy. In some other embodiments, only one cutter head 211 may be provided.

[0087] Please combine them together Figure 7 and Figure 8 As shown, in some other embodiments, the shape of the blade 211 of the electrode body 210 differs from that in the aforementioned embodiments. Please refer to... Figure 9 In this embodiment, the blade 211 comprises a curved segment 211a, a straight segment 211b, and a broken segment 211c. The curved segment 211a is approximately arc-shaped, the straight segment 211b extends approximately along a straight line, and the broken segment 211c has an approximately "V"-shaped bend. This blade 211 shape and the blade 211 of the aforementioned embodiment can be used in different surgeries for doctors to choose from.

[0088] Optionally, the cutter head 211 is any one or a combination of curved segment 211a, straight segment 211b, and broken segment 211c.

[0089] Please refer to the following: Figure 4 and Figure 9 The fastener 220 includes a plug portion 224 disposed within the conduit 100, and a limiting protrusion 225 is provided on the surface of the plug portion 224. During assembly, the plug portion 224 can be inserted into the conduit 100 from the distal end of the conduit 100, so that the limiting protrusion 225 interacts with the inner wall of the conduit 100 to fix the two together, ensuring the stability of the connection.

[0090] Please refer to it again. Figure 9 In some embodiments, the fixing member 220 has a relief groove 223 on the side away from the catheter 100, and in the unfolded state, at least a portion of the blade 211 is located within the relief groove 223. This facilitates the unfolding of the blade 211 to a suitable position and improves the stability of the blade 211 during surgery.

[0091] Furthermore, in some embodiments, the fixing member 220 is provided with a first guide wire channel 221, which communicates with the conduit 100. The guide wire can be lowered through the conduit 100 and the first guide wire channel 221 to facilitate the delivery of the drainage tube delivery device to the target position under the guidance of the guide wire.

[0092] like Figure 10 As shown, in another embodiment, the structure of the electrode body 210 differs from that of the aforementioned embodiment. For details, please refer to [the relevant documentation / reference]. Figure 11 and Figure 12In this embodiment, the electrode body 210 is fixedly connected to the distal end 120 of the conduit 100, and includes: a base 213, at least two bends 214, and an extension 215. The base 213 is connected to the conduit 100, and the at least two bends 214 are disposed on the side of the base 213 away from the conduit 100, and are respectively connected to different positions in the circumferential direction of the base 213; the extension 215 is connected to the side of the bends 214 away from the conduit 100.

[0093] like Figure 13 As shown, the bent portion 214 contacts the drainage tube body 300 and is compressed by the drainage tube body 300, allowing it to contract radially (i.e., in the direction perpendicular to the central axis O) inward, and causing the extension portion 215 to move away from the base 213, thus causing the electrode assembly 200 to enter a contracted state. When the electrode assembly 200 detaches from the drainage tube body 300, meaning the bent portion 214 is no longer compressed by the drainage tube body 300, it can expand radially outward, and cause the extension portion 215 to move closer to the base 213, thereby causing the electrode assembly 200 to enter an unfolded state.

[0094] Please refer to it again. Figure 12 The electrode body 210 has a central axis O. From one end of the bent portion 214 to the other end, the radial distance M between the bent portion 214 and the central axis O first increases and then decreases. The central axis O of the electrode body 210 is its geometric center line. From the end where the bent portion 214 connects to the base 213 to the other end where it connects to the extension portion 215, the perpendicular distance (i.e., radial distance) between the extension and the central axis O shows a trend of first increasing and then decreasing. The overall shape of the bent portion 214 is similar to a symmetrical or asymmetrical arc. Specifically, the bent portion 214 can be an arched, zigzag, or other curved single-peak protrusion structure. Its maximum radial distance can be located at the midpoint of the bent portion 214 or offset to one side. By setting it in the above structure, the bent portion 214 can smoothly contract according to the compression of the drainage tube body 300 when contracting, facilitating the doctor's operation.

[0095] In some embodiments, the bend 214 may also be arranged in a spiral shape to form a structure that is roughly similar to a drum-shaped spring.

[0096] Optionally, there may be multiple bends 214, which are arranged at intervals around the central axis O. For example... Figure 11 As shown, the two bent portions 214 are arranged approximately symmetrically on both sides of the central axis O; and as... Figure 14 As shown, the three bends 214 are arranged at intervals around the central axis O; or more bends 214 can be provided as needed.

[0097] like Figure 14As shown, the electrode body 210 is provided with a second guide wire channel 217, which passes through the base 213 and the extension 215 and communicates with the conduit 100. A guide wire can be lowered through the conduit 100 and the second guide wire channel 217 to facilitate the delivery of the drainage tube delivery device to the target site under the guidance of the guide wire.

[0098] like Figure 14 As shown, in some embodiments, the electrode body 210 is provided with a imaging structure 216, which is disposed on at least one of the base 213 and the extension 215. The imaging structure 216 can be visualized during ultrasound to facilitate the operator's observation of the position of the electrode body 210. Optionally, the imaging structure 216 is any one or a combination of pits, protrusions, and holes, and multiple imaging structures 216 are arranged on the base 213 and / or the extension 215.

[0099] like Figure 15 As shown, in some embodiments, the electrode body 210 further includes a cutting head 211, which is generally annularly connected to the extension 215 and located at the front end of the extension 215. Optionally, the cutting head 211 and the extension 215 can be configured as an integral structure or as separate structures.

[0100] Please refer to the following: Figure 16 , Figure 17 and Figure 18 In some embodiments, the electrode assembly 200 further includes a guide 230, which is fixedly connected to the base 213 and / or the catheter 100. The guide 230 passes through the base 213 and the extension 215, and the guide 230 and the extension 215 are movable relative to each other to guide the extension 215. The guide 230 has a third guidewire channel 231 communicating with the catheter 100. By providing the guide 230, during the process of switching the electrode assembly 200 from an deployed state to a retracted state, or from a retracted state to an deployed state, the extension 215 can be guided away from or closer to the base 213 by the guide 230, maintaining the stability of the electrode assembly 200 and thus improving the accuracy of the surgical operation. By providing the third guidewire channel 231, a guidewire can be lowered through the catheter 100 and the third guidewire channel 231 to facilitate the delivery of the drainage tube delivery device to the target site under the guidance of the guidewire.

[0101] It is understood that in the foregoing embodiments, the electrode body 210 in the electrode assembly 200 deforms due to the compression of the drainage tube body 300, and the electrode body 210 can be configured as an elastic component that undergoes elastic deformation due to the compression of the drainage tube body 300, thereby causing the electrode assembly 200 to switch to a contracted state.

[0102] Please refer to the following: Figure 19 and Figure 20 In other embodiments, the drainage tube delivery device further includes a core rod 400, which is movably inserted through the conduit 100 and the base 213 and connected to the extension 215. The core rod 400 is configured to move the extension 215 away from or towards the base 213. Specifically, by controlling the core rod 400 to move relative to the conduit 100 towards its proximal end 110, the extension 215 can be pulled closer to the base 213, thereby compressing the bend 214 connecting the two, causing the bend 214 to deform radially outward, thus putting the electrode assembly 200 in an unfolded state; by controlling the core rod 400 to move relative to the conduit 100 towards its distal end 120, the extension 215 can be pushed away from the base 213, thereby stretching the bend 214 connecting the two, causing the bend 214 to deform radially inward, thus switching the electrode assembly 200 to a contracted state. In the deployed state, current is introduced into the electrode assembly 200, which is pushed through the conduit 100 to establish a channel through the target tissue, and the drainage tube body 300 also enters the target tissue; in the retracted state, the conduit 100 is retracted, allowing the electrode assembly 200 to be withdrawn through the inner lumen of the drainage tube body 300, leaving the drainage tube body 300 in the target tissue. During use, the operator actively switches the state of the electrode assembly 200 by manipulating the core rod 400.

[0103] In some embodiments, the core rod 400 is provided with a fourth guide wire channel 410, through which a guide wire can be lowered to facilitate the delivery of the drainage tube delivery device to the target location under the guidance of the guide wire.

[0104] In addition, in some embodiments, the drainage tube delivery device also includes a guide wire (not shown in the figure), which is used to pass through the drainage tube body 300 and the catheter 100, so that the device can be delivered to the target position under the guidance of the guide wire.

[0105] In some embodiments, the drainage tube delivery device further includes an operating handle (not shown in the figure), which is disposed at the proximal end of the catheter 100 and is used to control the advancement and retraction of the electrode assembly 200. The operating handle may contain a transmission mechanism such as a wire-drawing mechanism, which is connected to the electrode assembly 200 to achieve the corresponding movement.

[0106] Accordingly, this application also provides an endoscope device, including the drainage tube delivery device as described in any of the above embodiments. It is understood that the endoscope device may possess all the technical features and effects of the drainage tube delivery device, which will not be elaborated upon here.

[0107] Furthermore, this application also provides a drainage tube delivery method, which is applied to the drainage tube delivery device of any of the above embodiments. The drainage tube delivery method includes: introducing current into the electrode assembly 200; pushing the electrode assembly 200 in an deployed state through the conduit 100 to establish a channel through the target tissue and allow the drainage tube body 300 to enter the target tissue; retracting the conduit 100 to withdraw the electrode assembly 200 through the inner lumen of the drainage tube body 300, leaving the drainage tube body 300 within the target tissue. The electrode assembly 200 and the drainage tube body 300 can enter the target tissue simultaneously or sequentially.

[0108] Specifically, the drainage tube delivery device can be inserted into the target location within the body along the guide wire. The electrode assembly 200 is energized via the operating handle and pushed through the target tissue to establish a channel, while the drainage tube body 300 simultaneously enters the target tissue. Afterwards, the power to the electrode assembly 200 is cut off, the catheter 100 is retracted, the electrode assembly 200 contracts and is withdrawn through the inner lumen of the drainage tube body 300, thus accurately placing the drainage tube body 300 within the target tissue.

[0109] In the description of this application, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0110] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0111] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0112] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A drainage tube delivery device, characterized in that, include: The catheter has a proximal end and a distal end; The drainage tube body is sleeved on the outside of the catheter and can move relative to it; An electrode assembly is connected to the distal end and is capable of contracting or expanding radially, wherein the radial dimension of the electrode assembly in the contracted state is smaller than that in the expanded state. The electrode assembly is configured to be movable within the inner cavity of the drainage tube body when in the contracted state; The electrode assembly is also configured to detach from the drainage tube body and be in the deployed state.

2. The drainage tube delivery device according to claim 1, characterized in that, The electrode assembly includes: The electrode body is configured to deform so that the electrode assembly switches between the contracted state and the expanded state.

3. The drainage tube delivery device according to claim 2, characterized in that, The electrode body is configured to be elastic; When the drainage tube body moves toward the distal end, its inner cavity can squeeze the electrode body, causing the electrode body to undergo elastic deformation, so that the electrode assembly switches to the contracted state. When the drainage tube body moves toward the proximal end, the electrode body can detach from the drainage tube body, so that the electrode assembly switches to the deployed state.

4. The drainage tube delivery device according to claim 3, characterized in that, The electrode assembly also includes: A fastener is connected to the conduit, and the fastener is provided with an assembly hole; The electrode body includes a blade and a contact part connected together. The blade is located on the side of the fixing member away from the conduit, and the contact part passes through the assembly hole.

5. The drainage tube delivery device according to claim 4, characterized in that, The fixing member is provided with a first guide wire channel, which is connected to the catheter.

6. The drainage tube delivery device according to claim 4, characterized in that, The fixing member has a clearance groove on the side away from the conduit, and in the unfolded state, at least a portion of the cutter head is located within the clearance groove.

7. The drainage tube delivery device according to claim 4, characterized in that, The fixing member includes an insertion part disposed inside the conduit, and the surface of the insertion part is provided with a limiting protrusion.

8. The drainage tube delivery device according to claim 4, characterized in that, The electrode assembly includes at least two electrode bodies, which are disposed at different positions in the circumferential direction of the fixing member.

9. The drainage tube delivery device according to claim 4, characterized in that, The cutting head is any one or a combination of curved segments, straight segments, and broken segments.

10. The drainage tube delivery device according to claim 2, characterized in that, The electrode body includes: The base is connected to the conduit; At least two bends are provided on the side of the base away from the conduit and connected to different positions in the circumferential direction of the base; An extension is connected to the side of the bend away from the conduit; When the extension is far from the base, the bent portion can contract radially inward; when the extension is close to the base, the bent portion can expand radially outward.

11. The drainage tube delivery device according to claim 10, characterized in that, The electrode body has a central axis; From one end of the bend to the other end, the radial distance between the bend and the central axis first increases and then decreases.

12. The drainage tube delivery device according to claim 11, characterized in that, The bent portion is arranged in a spiral shape.

13. The drainage tube delivery device according to claim 10, characterized in that, The bent portion is squeezed by the drainage tube body, which causes it to contract radially inward and move the extension portion away from the base.

14. The drainage tube delivery device according to claim 13, characterized in that, The electrode body is provided with a second guidewire channel, which passes through the base and the extension and communicates with the conduit.

15. The drainage tube delivery device according to claim 10, characterized in that, The electrode assembly also includes: A guide member is fixedly connected to the base and / or the catheter and passes through the base and the extension. The guide member and the extension are movable relative to each other. The guide member is provided with a third guidewire channel communicating with the catheter.

16. The drainage tube delivery device according to claim 10, characterized in that, Also includes: The core rod is movably inserted into the conduit and the base and connected to the extension. The core rod is configured to move the extension away from or towards the base. The core rod is provided with a fourth guidewire channel.

17. The drainage tube delivery device according to claim 10, characterized in that, The base and / or the extension are provided with a developing structure.

18. The drainage tube delivery device according to claim 10, characterized in that, The electrode body also includes: The cutting head is connected to the extension.

19. The drainage tube delivery device according to claim 1, characterized in that, Also includes: A guidewire is used to pass through the drainage tube body and the catheter.

20. The drainage tube delivery device according to claim 1, characterized in that, The drainage tube body includes: The tapering section has a gradually decreasing outer diameter along the direction from the proximal end to the distal end.

21. An endoscopic device, characterized in that, Includes the drainage tube delivery device as described in any one of claims 1 to 20.

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