Devices, systems, methods of assembly, and methods of disassembly for ablation treatment of the digestive tract

Abstract

The present application relates to the device, system, assembly method and disassembly method of ablation treatment to digestive tract, the device includes: catheter assembly, expandable component, digestive tract endoscope. The present application connects the catheter in the front section with the catheter in the rear section, the outer catheter in the front section with the outer catheter in the rear section and the front section wire with the rear section wire in the operation site and before operation, so that the thinner catheter, outer catheter and wire can be respectively passed through the channel before treatment, and the thicker expandable component is assembled to the front end port of the channel outside; During operation, the expandable component in the contracted working state and the digestive tract endoscope enter and exit the digestive tract in front and back, and the smaller radial dimension is less stimulated to the digestive tract, and the problem that the larger diameter of the expandable component is difficult to stretch into the channel is solved.

Description

Technical Field

[0001] This invention relates to a medical device, particularly a device and system for ablation therapy of the digestive tract, and also to a method for assembling and disassembling the device for ablation therapy of the digestive tract. Background Technology

[0002] Gastrointestinal ablation therapy is a minimally invasive endoscopic treatment, primarily involving the insertion of ablation instruments through the instrument channel of a gastroscope / colonoscope for gastrointestinal treatment. In the prior art, CN122681569A discloses a device for ablation therapy of the gastrointestinal tract, including a catheter assembly and an expandable component. The catheter assembly includes a slender middle catheter and a slender outer catheter, with the outer catheter rotatably fitted onto the middle catheter. The expandable component, connected to the catheter assembly, includes an electrode membrane and a support frame located inside the electrode membrane for supporting it. When the middle catheter rotates relative to the outer catheter, the expandable component can switch between a radially decreasing contraction state and a radially increasing expansion state. However, in actual operation, clinically used gastroscopes have a very small diameter surgical instrument channel (also called a forceps channel) for removing polyps or other lesions observed during gastroscopy. In the prior art, the electrode membranes of the expandable component overlap in the contracted state, resulting in a large radial dimension, making it difficult for the expandable component to be inserted into the surgical instrument channel in the contracted state. Therefore, during the surgery, the treatment device and the endoscope need to be inserted side by side through the esophagus and stomach and into the duodenum, which greatly increases the patient's pain and the difficulty of the surgery. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved device and system for ablation therapy of the digestive tract; at the same time, it also provides an assembly method and a disassembly method for the device for ablation therapy of the digestive tract.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A device for ablation therapy of the digestive tract, comprising: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. A digestive tract endoscope having a forceps channel, the forceps channel having a front port and a rear port; The central conduit includes a front central conduit near the expandable component and a rear central conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The rear central conduit, the rear outer conduit, and the rear wire are inserted into the clamp channel. The expandable component is located outside the front end of the front port of the clamp channel. At the front of the front port of the clamp channel, the rear end of the front central conduit is detachably connected to the front end of the rear central conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

[0005] The present invention also provides an apparatus for ablation therapy of the digestive tract, comprising: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. The middle conduit includes a front middle conduit near the expandable component and a rear middle conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The lengths of the rear middle conduit, the rear outer conduit, and the rear wire are respectively greater than the lengths of the front middle conduit, the front outer conduit, and the front wire. The rear end of the front middle conduit is detachably connected to the front end of the rear middle conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

[0006] The present invention also provides an apparatus for ablation therapy of the digestive tract, comprising: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. A digestive tract endoscope having a forceps channel, the forceps channel having a front port and a rear port; The central conduit includes a front central conduit near the expandable component and a rear central conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The front central conduit, the front outer conduit, and the front wire are inserted into the clamp channel. The expandable component is located outside the front end of the front port of the clamp channel. At the rear of the rear port of the clamp channel, the rear end of the front central conduit is detachably connected to the front end of the rear central conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

[0007] The present invention also provides an apparatus for ablation therapy of the digestive tract, comprising: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. The central conduit includes a front central conduit near the expandable component and a rear central conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The lengths of the front central conduit, the front outer conduit, and the front wire are respectively greater than the lengths of the rear central conduit, the rear outer conduit, and the rear wire. The rear end of the front central conduit is detachably connected to the front end of the rear central conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

[0008] Optionally, it further includes a connector having a first connecting portion and a second connecting portion, the distance between the first connecting portion and the second connecting portion being variably set; the middle conduit being rotatably disposed relative to the outer conduit; the electrode membrane being wound and sleeved on the support member, the support member being a support frame and located inside the electrode membrane; the inner end of the electrode membrane being connected to the support frame; the outer end of the electrode membrane being connected to the second connecting portion of the connector; and the front section of the outer conduit being connected to the first connecting portion of the connector.

[0009] Alternatively, the first connection portion of the connector is detachably connected to the front external conduit.

[0010] Optionally, it also includes an electrical connector having a first conductive portion and a second conductive portion that are electrically connected, a front conductor that is fixedly or detachably electrically connected to the first conductive portion, and a rear conductor that is detachably electrically connected to the second conductive portion.

[0011] Alternatively, the electrical connector includes a base and a locking member detachably connected to the base. A first conductive part and a second conductive part are respectively disposed on the base. When the locking member is connected to the base, the locking member fixes the front end of the rear conductor relative to the second conductive part and forms an electrical connection.

[0012] Alternatively, the second conductive portion includes an elastic conductive member with contact terminals, an insulating sealing ring disposed circumferentially around the elastic conductive member, wherein during electrical connection, the elastic conductive member has a tendency to drive the contact terminals toward the front end of the rear section of the conductor; and / or, there are multiple second conductive portions distributed side by side at intervals.

[0013] Alternatively, the rear end of the support frame is fixed on the front middle conduit, and the front end of the support frame is sleeved on the front middle conduit. When the support frame changes between the contraction working state and the expansion working state, the front end of the support frame can slide forward or backward along the axial direction of the front middle conduit.

[0014] Optionally, the rear end of the front conduit has a first latching member, and the front end of the rear conduit has a second latching member that cooperates with the first latching member. A latching groove is formed on the side wall of either the first or the second latching member, and the other is inserted into the latching groove along the radial direction of the conduit and fixed relative to it.

[0015] Optionally, the rear outer conduit is sleeved on the rear end of the front outer conduit, and the inner wall of the rear outer conduit is provided with a positioning post extending radially inward along the outer conduit. The side wall of the front outer conduit is provided with a positioning hole. When connected, the positioning post on the rear outer conduit is inserted into the positioning hole on the front outer conduit for relative fixation; and / or, the rear middle conduit is rotatably connected to the rear outer conduit and sleeved on the rear end of the front middle conduit, wherein the inner wall of the rear middle conduit has a positioning post extending radially inward along the middle conduit, and the side wall of the front middle conduit is provided with a positioning hole. When connected, the positioning post on the rear middle conduit is inserted into the positioning hole on the front middle conduit for relative fixation.

[0016] The present invention also provides a system for ablation therapy of the digestive tract, which includes the above-described apparatus for ablation therapy of the digestive tract.

[0017] The present invention also provides a method for assembling a device for ablation therapy of the digestive tract, comprising the following steps: (1) Insert the middle conduit, the outer conduit, and the lead wire into the clamp channel from the rear port of the clamp channel, and make the front end of the middle conduit, the front end of the outer conduit, and the front end of the lead wire protrude outside the front port of the clamp channel; (2) At the front of the front port of the forceps, make the connection between the rear end of the front middle catheter and the front end of the rear middle catheter, the connection between the rear end of the front external catheter and the front end of the rear external catheter, and the electrical connection between the rear end of the front wire and the front end of the rear wire, so that the expandable component is located on the front side of the external endoscope of the digestive tract.

[0018] The present invention also provides a method for disassembling a device for ablation therapy of the digestive tract, comprising the following steps: (1) At the front of the front port of the clamp channel, the rear end of the front middle catheter and the front end of the rear middle catheter are disconnected, the rear end of the front external catheter and the front end of the rear external catheter are disconnected, and the rear end of the front wire and the front end of the rear wire are disconnected, so that the front middle catheter, the front external catheter and the front wire connected to the expandable component are separated from the rear middle catheter, the rear external catheter and the rear wire. (2) Pull out the posterior middle catheter, posterior external catheter, and posterior wire from the posterior port of the forceps, so that the digestive tract endoscope is separated from the posterior middle catheter, posterior external catheter, and posterior wire.

[0019] The present invention also provides a method for assembling a device for ablation therapy of the digestive tract, comprising the following steps: (1) Insert the front middle catheter, the front outer catheter, and the front lead wire into the clamp channel from the front port of the clamp channel, and make the rear end of the front middle catheter, the rear end of the front outer catheter, and the rear end of the front lead wire protrude outside the rear port of the clamp channel. (2) At the rear end of the forceps channel, make the connection between the rear end of the anterior middle catheter and the anterior end of the posterior middle catheter, the connection between the rear end of the anterior external catheter and the anterior end of the posterior external catheter, and the electrical connection between the rear end of the anterior wire and the anterior end of the posterior wire, so that the expandable component is located on the anterior side of the digestive tract endoscope.

[0020] The present invention also provides a method for disassembling a device for ablation therapy of the digestive tract, comprising the following steps: (1) At the rear end of the rear port of the clamp channel, the rear end of the front middle catheter and the front end of the rear middle catheter are disconnected, the rear end of the front external catheter and the front end of the rear external catheter are disconnected, and the rear end of the front wire and the front end of the rear wire are disconnected, so that the front middle catheter, the front external catheter and the front wire connected to the expandable component are separated from the rear middle catheter, the rear external catheter and the rear wire. (2) Pull out the anterior middle catheter, anterior external catheter, and anterior wire from the anterior port of the forceps, so that the digestive tract endoscope is separated from the anterior middle catheter, anterior external catheter, and anterior wire.

[0021] Compared with the prior art, the present invention has the following advantages: This invention connects the anterior and posterior middle catheters, the anterior and posterior external catheters, and the anterior and posterior lead wires at the surgical site and before surgery. This allows the thinner middle catheter, external catheter, and lead wire to pass through the forceps channel before treatment, while the thicker expandable component is assembled on the anterior side of the front port of the forceps channel. During surgery, the expandable component in its contracted working state and the digestive endoscope enter and exit the digestive tract one after the other. Its smaller radial size causes less stimulation to the digestive tract, solving the problem that the larger diameter of the expandable component is difficult to insert through the forceps channel. Attached Figure Description

[0022] Appendix Figure 1 This is a front view of the system for ablation therapy of the digestive tract according to the present invention (the expandable component is in a contracted working state, and the forceps channel is omitted); Appendix Figure 2 This is a partial three-dimensional structural schematic diagram of an embodiment of the device for ablation therapy of the digestive tract according to the present invention (the expandable component is in a contracted working state, showing the forceps channel). Appendix Figure 3 This is a partial three-dimensional structural schematic diagram of an embodiment of the device for ablation therapy of the digestive tract according to the present invention (the expandable component is in the expansion working state, showing the forceps channel). Appendix Figure 4 For the appendix Figure 2 An exterior view from one angle; Appendix Figure 5 For the appendix Figure 4 Schematic diagram of the AA direction section; Appendix Figure 6 For the appendix Figure 4 Enlarged cross-sectional view along the BB direction (partially omitted); Appendix Figure 7 For the appendix Figure 2 An exterior view from another angle; Appendix Figure 8 For the appendix Figure 7 The sectional view along the CC direction in the middle; Appendix Figure 9 For the appendix Figure 3 An exterior view from one angle; Appendix Figure 10 For the appendix Figure 9 DD direction section view; Appendix Figure 11 For the appendix Figure 3 An exterior view from another angle; Appendix Figure 12 For the appendix Figure 11 EE direction section view; Appendix Figure 13 For the appendix Figure 2 Enlarged view of the structure at point F in the image; Appendix Figure 14 This is an exploded and enlarged structural diagram of an electrical connector; Appendix Figure 15 For the appendix Figure 8 Enlarged view of the partial structure of the CEC connector and wires; Appendix Figure 16 This is a partial three-dimensional structural diagram of an embodiment of the device for ablation therapy of the digestive tract according to the present invention (the expandable component is in the expansion working state, showing the forceps channel, and the rear lead wire is omitted). Appendix Figure 17 for Figure 16 The diagram of the posterior segment of the middle catheter and the posterior segment of the external catheter is omitted. Appendix Figure 18 For the appendix Figure 16 An exterior view from one angle; Appendix Figure 19 for Figure 18 Schematic diagram of cross-section along the GG direction in the middle; Appendix Figure 20 This is an external view of an embodiment of the device for ablation therapy of the digestive tract according to the present invention (the expandable component is in the contracted working state, showing the forceps channel, and the rear lead is omitted). Appendix Figure 21 for Figure 20 Schematic diagram of cross-section along the HH direction in the middle; The components are as follows: 1. Middle catheter; 10. Front middle catheter; 100. First locking element; 11. Rear middle catheter; 110. Second locking element; 2. External catheter; 20. Front external catheter; 21. Rear external catheter; 3. Expandable component; 30. Electrode membrane; 300. Electrode; 31. Support frame; 310. Deformable component; 4. Connector; 41. First connecting part; 42. Second connecting part; 5. Wire; 50. Front wire; 51. Rear wire; 6. Actuator; 7. Digestive tract endoscope; 70. Forceps channel; 8. Connecting buckle; 9. Electrical connector; 90. Second conductive part; 900. Elastic conductive element; 901. Insulating sealing ring; 91. Instrument base; 92. Locking element; 93. Signal generator. Detailed Implementation

[0023] In this invention, the digestive tract refers to the oral cavity, esophagus, stomach, duodenum, small intestine, large intestine, and anus, while the upper digestive tract refers to the areas that a gastroscopy can penetrate, including the esophagus, stomach, and duodenum. This invention is particularly applicable to the upper digestive tract. In this invention, "front" refers to the direction in which the device advances into the digestive tract, and "rear" refers to the direction in which it retracts, for example, as shown in the attached image. Figure 1 In this context, "front" refers to the direction facing left, and "back" refers to the direction facing right. The terms "front" and "back" in this text are defined in the same direction. "Front end" refers to the end furthest from the operator (doctor), also known as the distal end in the industry, while "rear end" refers to the end closest to the operator, also known as the proximal end in the industry. In this text, "part" (e.g., "front part," "rear part") used with directional terms refers to the portion beyond the corresponding median line; for example, "front part" refers to the portion located in front of the median line in the front-back direction. Conversely, "end" or "end point" used with directional terms (e.g., "front end," "front end point," "rear end point," "rear end point") refers to the portion beyond the corresponding median line and furthest from it; for example, "front end point" or "front end" refers to the portion in front of the median line in the front-back direction and furthest from it.

[0024] This application is an improvement on CN122681569A. All disclosures of CN122681569A are incorporated into this application and form part of this specification.

[0025] Example 1, see appendix Figure 1 To be continued Figure 15 This embodiment relates to a device for ablation treatment of the digestive tract, which includes a slender middle catheter 1, a slender outer catheter 2, an expandable component 3, a connector 4, a wire 5, an actuator 6, and a digestive tract endoscope 7.

[0026] Specifically, the outer conduit 2 is sleeved on the middle conduit 1, and the middle conduit 1 is rotatably disposed relative to the outer conduit 2. The middle conduit 1 includes a front section of the middle conduit 10 near the expandable component 3 and a rear section of the middle conduit 11 away from the expandable component 3. The outer conduit 2 includes a front section of the outer conduit 20 near the expandable component 3 and a rear section of the outer conduit 21 away from the expandable component 3. The rear end of the front section of the middle conduit 10 is detachably connected to the front end of the rear section of the middle conduit 11, and the rear end of the front section of the outer conduit 20 is detachably connected to the front end of the rear section of the outer conduit 21.

[0027] In some specific implementations, in conjunction with the appendix Figure 13 As shown, the rear end of the front conduit 10 has a first locking member 100, and the front end of the rear conduit 11 has a second locking member 110 that can cooperate with the first locking member 100. One of the first locking member 100 and the second locking member 110 has a locking groove formed on its sidewall, and the other is inserted into the locking groove along the radial direction of the conduit 1 and fixed relative to it. In this embodiment, the sidewall of the first locking member 100 has a locking groove, and the second locking member 110 is inserted into the locking groove and can cooperate with the first locking member 100. The first locking member 100 is limited in the circumferential and axial directions. The second locking member 110 is made of elastic material so that it can be disengaged from the locking groove on the first locking member 100 with a certain deformation during disassembly, so that the front middle conduit 10 and the rear middle conduit 11 can be separated from each other. The rear end of the front outer conduit 20 is inserted into the front end of the rear outer conduit 21, and the rear end of the front outer conduit 20 and the front end of the rear outer conduit 21 can be connected and fixed by threaded connection or other conventional detachable connection methods.

[0028] In this example, the expandable component 3 includes a flexible electrode membrane 30 having multiple electrodes 300, and a support frame 31 located inside the electrode membrane 30 for supporting the electrode membrane 30. The rear end of the support frame 31 is connected to the central conduit 1, and the electrode membrane 30 is wound around the support frame 31. When the central conduit 1 rotates relative to the outer conduit 2, the expandable component 3 switches between a radially decreasing contraction working state and a radially increasing expansion working state. It should be noted that when the expandable component 3 is in the contraction working state, the electrode membrane 30 and the support frame 31 are also in the radially decreasing contraction working state; when the expandable component 3 is in the expansion working state, the electrode membrane 30 and the support frame 31 are also in the radially increasing expansion working state.

[0029] In some specific implementations, see Figure 5 , Figure 8 , Figure 10 , Figure 12As shown, the rear end of the support frame 31 is fixed to and close to the rear end of the front middle conduit 10, and the front end of the support frame 31 is sleeved on the front middle conduit 10. When the support frame 31 changes between the contraction working state and the expansion working state, the front end of the support frame 31 can slide forward or backward along the axial direction of the middle conduit 1. When the support frame 31 changes from the contraction working state to the expansion working state, the front end of the support frame 31 slides backward along the axial direction of the middle conduit 1. When the support frame 31 changes from the expansion working state to the contraction working state, the front end of the support frame 31 slides forward along the axial direction of the middle conduit 1. The support frame 31 has a deformable component 310, and when the support frame 31 changes between the contraction working state and the expansion working state, the deformable component 310 changes shape. The deformable component 310 is made of a hard elastic material (i.e., a rigid material with elasticity, such as titanium-nickel alloy, stainless steel, etc.). The deformable component 310 gives the support frame 31 a radially outward elastic force when changing from the contraction working state to the expansion working state.

[0030] In this example, connector 4 has a first connecting portion 41 and a second connecting portion 42, the distance between which is variably set. The inner end of electrode membrane 30 is connected to support frame 31, and the outer end of electrode membrane 30 is connected to the second connecting portion 42 of connector 4. Outer conduit 2 is connected to the first connecting portion 41 of connector 4. Therefore, when conduit 1 rotates relative to outer conduit 2, the inner end of electrode membrane 30 rotates relative to the outer end of electrode membrane 30, and deformable member 310 undergoes elastic deformation, so that support frame 31 abuts against the inner side of electrode membrane 30, and expandable member 3 switches between contracted and expanded working states.

[0031] In some specific embodiments, the connector 4 itself is a long strip-shaped rigid connector, and the two ends of the connector 4 are a first connecting part 41 and a second connecting part 42, respectively. The first connecting part 41 of the connector 4 is detachably connected to the front external conduit 20, wherein the front external conduit 20 is detachably connected to a connecting buckle 8, which can be any existing connecting buckle. The first connecting part 41 of the connector 4 is pivotally connected to the connecting buckle 8. The second connecting part 42 of the connector 4 is pivotally connected to the outer end of the electrode film 30. As the expandable component 3 switches between the contracted working state and the expanded working state, the second connecting part 42 of the connector 4 moves toward or away from the middle conduit 1 around the center line of the pivot to which the first connecting part 41 of the connector 4 is connected.

[0032] In this example, the electrode 300 is electrically connected to a wire 5, which includes a front section wire 50 near the expandable component 3 and a rear section wire 51 away from the expandable component 3. The rear end of the front section wire 50 and the front end of the rear section wire 51 are detachably electrically connected. The front end of the front section wire 50 is electrically connected to the electrode, and the rear section wire 51 is attached to the outer wall of the rear section conduit 11 and inserted into the outer conduit 2.

[0033] In this example, the device also includes an electrical connector 9 having a first conductive part (not shown) and a second conductive part 90 that are electrically connected to each other. The rear end of the front conductor 50 is fixedly or detachably electrically connected to the first conductive part, and the front end of the rear conductor 51 is detachably electrically connected to the second conductive part 90.

[0034] In some specific embodiments, the electrical connector 9 includes a base 91 and a locking member 92 detachably connected to the base 91. A first conductive part and a second conductive part 90 are respectively disposed on the base 91. When the locking member 92 is connected to the base 91, the locking member 92 fixes the front end of the rear section wire 51 relative to the second conductive part 90 and forms an electrical connection.

[0035] Combination Figures 13 to 15 As shown, the base 91 is rectangular, with one end recessed to form an insertion slot. The first conductive part is a wire built into the base 91, and the rear end of the front wire 50 is inserted into the insertion slot of the base 91 and fixedly connected to the first conductive part. Multiple second conductive parts 90 are arranged side-by-side on one side wall of the base 91, each including an elastic conductive element 900 with contact terminals and an insulating sealing ring 901 circumferentially arranged around the elastic conductive element 900. The elastic conductive element 900 can be any conventional elastic metal conductor, such as a U-shaped metal spring. During electrical connection, the elastic conductive element 900 drives the contact terminals to the rear end. The tendency of the front end of the conductor 51 to move causes the insulating sealing ring 901 to press between the front end of the rear conductor 51 and the base 91 to form high-voltage electrical insulation and sealing. The locking member 92 is a snap-fit ​​member that can be engaged with the base 91. When the locking member 92 is engaged with the base 91, the locking member 92 presses and fixes the front end of the rear conductor 51 and the second conductive part 90 to form an electrical connection. An electrical connection is formed between the rear end of the front conductor 50 and the front end of the rear conductor 51. When the locking member 92 is disengaged from the base 91, the front end of the rear conductor 51 can be separated from the second conductive part 90, and the rear end of the front conductor 50 is disconnected from the front end of the rear conductor 51.

[0036] In this example, actuator 6 is an operating handle that drives the connected middle conduit 1 to rotate relative to the outer conduit 2, causing the expandable component 3 to switch between a contracted working state and an expanded working state. The actuator can employ a solution already existing in the prior art.

[0037] In this example, the digestive tract endoscope 7 has a channel 70, which has a front port and a rear port. At the front of the front port of the channel 70, the rear middle catheter 11, the rear external catheter 21, and the rear wire 51 are inserted into the channel 70. The expandable component 3 is located outside the front side of the front port of the channel 70. The rear end of the front middle catheter 10 is detachably connected to the front end of the rear middle catheter 11, the rear end of the front external catheter 20 is detachably connected to the front end of the rear external catheter 21, and the rear end of the front wire 50 is detachably electrically connected to the front end of the rear wire 51.

[0038] This embodiment solves the problem that the large diameter of the expandable component is difficult to insert through the forceps channel by connecting the front and rear middle catheters, the front and rear external catheters, and the front and rear lead wires at the surgical site and before the operation. This allows the middle catheter, external catheter, and lead wire to pass through the forceps channel before treatment. The expandable component is assembled on the front side of the front port of the forceps channel, thus solving the problem that the expandable component is difficult to insert through the forceps channel.

[0039] Example 2: This example provides a device for ablation therapy of the digestive tract. Compared to Example 1, the structure is basically the same, except that it includes: The catheter assembly includes an elongated middle catheter 1 and an elongated outer catheter 2, the outer catheter 2 being sleeved on the middle catheter 1, and the middle catheter 1 being rotatably disposed relative to the outer catheter 2; The expandable component 3 is connected to the front of the catheter assembly. The expandable component 3 includes: a flexible electrode membrane 30 having multiple electrodes 300, and a support frame 31 located inside the electrode membrane 30 and used to support the electrode membrane 30. The electrode membrane 30 is wound and sleeved on the support frame 31. When the catheter 1 rotates relative to the outer catheter 2, the expandable component 3 switches between a radially smaller contraction working state and a radially larger expansion working state. The middle conduit 1 includes a front middle conduit 10 near the expandable component 3 and a rear middle conduit 11 away from the expandable component 3. The outer conduit 2 includes a front outer conduit 20 near the expandable component 3 and a rear outer conduit 21 away from the expandable component 3. The electrode 300 is electrically connected to a wire 5, which includes a front wire 50 near the expandable component 3 and a rear wire 51 away from the expandable component 3. The lengths of the rear middle conduit 11, the rear outer conduit 21, and the rear wire 51 are all greater than the lengths of the front middle conduit 10, the front outer conduit 20, and the front wire 50, respectively. The rear end of the front middle conduit 10 is detachably connected to the front end of the rear middle conduit 11, the rear end of the front outer conduit 20 is detachably connected to the front end of the rear outer conduit 21, and the rear end of the front wire 50 is detachably electrically connected to the front end of the rear wire 51.

[0040] Example 3, combined with Figures 16 to 21 As shown, the device for ablation treatment of the digestive tract provided in this embodiment has a basically the same structure as that in Embodiment 1, except that it includes: The catheter assembly includes an elongated middle catheter 1 and an elongated outer catheter 2, the outer catheter 2 being sleeved on the middle catheter 1, and the middle catheter 1 being rotatably disposed relative to the outer catheter 2; The expandable component 3 is connected to the front of the catheter assembly. The expandable component 3 includes: a flexible electrode membrane 30 having multiple electrodes 300, and a support frame 31 located inside the electrode membrane 30 and used to support the electrode membrane 30. The electrode membrane 30 is wound and sleeved on the support frame 31. When the catheter 1 rotates relative to the outer catheter 2, the expandable component 3 switches between a radially smaller contraction working state and a radially larger expansion working state. A digestive tract endoscope 7 has a forceps channel 70, which has a front port and a rear port; The middle conduit 1 includes a front middle conduit 10 near the expandable component 3 and a rear middle conduit 11 away from the expandable component 3. The outer conduit 2 includes a front outer conduit 20 near the expandable component 3 and a rear outer conduit 21 away from the expandable component 3. The electrode 300 is electrically connected to a wire 5, which includes a front wire 50 near the expandable component 3 and a rear wire 51 away from the expandable component 3. The front middle conduit 10, the front outer conduit 20, and the front wire 50 are inserted into the clamp channel 70. The expandable component 3 is located outside the front side of the front port of the clamp channel 70. At the rear of the rear port of the clamp channel 70, the rear end of the front middle conduit 10 is detachably connected to the front end of the rear middle conduit 11, the rear end of the front outer conduit 20 is detachably connected to the front end of the rear outer conduit 21, and the rear end of the front wire 50 is detachably electrically connected to the front end of the rear wire 51.

[0041] In this embodiment, the front end of the rear external conduit 21 is sleeved on the rear end of the front external conduit 20. The inner wall of the rear external conduit 21 has a positioning post extending radially. The rear end of the front external conduit 20 has a positioning hole. During connection, the positioning post on the rear external conduit 21 is inserted into the positioning hole on the front external conduit 20 for relative fixation. The rear middle conduit 11 is rotatably connected to the rear external conduit 21 and sleeved on the rear end of the front middle conduit 10. The inner wall of the rear middle conduit 11 has a positioning post extending radially. The rear end of the front conduit 10 has a positioning hole. When connected, the positioning pin on the rear conduit 11 is inserted into the positioning hole on the front conduit 10 for relative fixation. The rear outer conduit 21 and the rear middle conduit 11 are formed by detachably splicing two parts in their own radial direction to achieve fixation and disassembly. There are at least two positioning pins, which are respectively set on the two parts of the rear outer conduit 21 and the rear middle conduit 11. The inner wall of the rear end of the rear outer conduit 21 is also formed with a T-shaped groove, and the front end of the rear middle conduit 11 is correspondingly inserted into the T-shaped groove.

[0042] Meanwhile, the side wall of the rear outer conduit 21 is also formed with a through-channel lead groove. The front conductor 50 fits against the outer wall of the front middle conduit 10 and is inserted into the outer conduit 2. The rear end of the front conductor 50 is passed through the lead groove on the rear outer conduit 21.

[0043] Example 4: This example provides a device for ablation therapy of the digestive tract. Compared to Example 1, the structure is basically the same, except that it includes: The catheter assembly includes an elongated middle catheter 1 and an elongated outer catheter 2, the outer catheter 2 being sleeved on the middle catheter 1, and the middle catheter 1 being rotatably disposed relative to the outer catheter 2; The expandable component 3 is connected to the front of the catheter assembly. The expandable component 3 includes: a flexible electrode membrane 30 having multiple electrodes 300, and a support frame 31 located inside the electrode membrane 30 and used to support the electrode membrane 30. The electrode membrane 30 is wound and sleeved on the support frame 31. When the catheter 1 rotates relative to the outer catheter 2, the expandable component 3 switches between a radially smaller contraction working state and a radially larger expansion working state. The middle conduit 1 includes a front middle conduit 10 near the expandable component 3 and a rear middle conduit 11 away from the expandable component 3. The outer conduit 2 includes a front outer conduit 20 near the expandable component 3 and a rear outer conduit 21 away from the expandable component 3. The electrode 300 is electrically connected to a wire 5, which includes a front wire 50 near the expandable component 3 and a rear wire 51 away from the expandable component 3. The lengths of the front middle conduit 10, the front outer conduit 20, and the front wire 50 are all greater than the lengths of the rear middle conduit 11, the rear outer conduit 21, and the rear wire 51, respectively. The rear end of the front middle conduit 10 is detachably connected to the front end of the rear middle conduit 11, the rear end of the front outer conduit 20 is detachably connected to the front end of the rear outer conduit 21, and the rear end of the front wire 50 is detachably electrically connected to the front end of the rear wire 51.

[0044] Example 5, combined with Figure 1 As shown, this embodiment provides a system for ablation treatment of the digestive tract, which includes the above-mentioned device for ablation treatment of the digestive tract. It also includes a signal generator 93, which is configured to generate an electrical signal for generating electric field energy. The signal generator 93 is electrically connected to a plurality of electrodes 300 on the electrode membrane 30 to supply power to them.

[0045] Example 6: This example provides a method for assembling a device for ablation treatment of the digestive tract as in Example 1, comprising the following steps: (1) Insert the rear middle conduit 11, the rear outer conduit 21, and the rear wire 51 into the clamp channel 70 from the rear port of the clamp channel 70, and make the front end of the rear middle conduit 11, the front end of the rear outer conduit 21, and the front end of the rear wire 51 protrude outside the front port of the clamp channel 70. (2) At the front side of the front port of the forceps 70, the rear end of the front middle catheter 10 is connected to the front end of the rear middle catheter 11, the rear end of the front external catheter 20 is connected to the front end of the rear external catheter 21, and the electrical connection is made between the rear end of the front wire 50 and the front end of the rear wire 51, so that the expandable component 3 is located on the front side of the digestive tract endoscope 7.

[0046] Example 7: This example provides a method for disassembling a device for ablation treatment of the digestive tract as described in Example 1, comprising the following steps: (1) On the front side of the front port of the clamp channel 70, the rear end of the front middle conduit 10 and the front end of the rear middle conduit 11, the rear end of the front outer conduit 20 and the front end of the rear outer conduit 21, and the rear end of the front wire 50 and the front end of the rear wire 51 are disconnected, so that the front middle conduit 10, the front outer conduit 20, and the front wire 50 connected to the expandable component 3 are separated from the rear middle conduit 11, the rear outer conduit 21, and the rear wire 51. (2) Pull out the posterior middle catheter 11, posterior external catheter 21, and posterior wire 51 from the rear port of the forceps 70, so that the digestive tract endoscope 7 is separated from the posterior middle catheter 11, posterior external catheter 21, and posterior wire 51.

[0047] Example 8: This example provides a method for assembling a device for ablation treatment of the digestive tract as described in Example 3, comprising the following steps: (1) Insert the front middle catheter 10, the front external catheter 20, and the front wire 50 into the clamp channel 70 from the front port of the clamp channel 70, and make the rear end of the front middle catheter 10, the rear end of the front external catheter 20, and the rear end of the front wire 50 protrude outside the rear port of the clamp channel 70. (2) At the rear end of the rear port of the forceps 70, the rear end of the front middle catheter 10 is connected to the front end of the rear middle catheter 11, the rear end of the front external catheter 20 is connected to the front end of the rear external catheter 21, and the rear end of the front wire 50 is connected to the front end of the rear wire 51, so that the expandable component 3 is located on the front side of the digestive tract endoscope 7.

[0048] Example 9: This example provides a method for disassembling a device for ablation treatment of the digestive tract as described in Example 3, comprising the following steps: (1) At the rear end of the rear port of the clamp channel 70, the rear end of the front middle conduit 10 and the front end of the rear middle conduit 11, the rear end of the front outer conduit 20 and the front end of the rear outer conduit 21, and the rear end of the front wire 50 and the front end of the rear wire 51 are disconnected, so that the front middle conduit 10, the front outer conduit 20, and the front wire 50 connected to the expandable component 3 are separated from the rear middle conduit 11, the rear outer conduit 21, and the rear wire 51. (2) Pull out the anterior middle catheter 10, the anterior external catheter 20, and the anterior wire 50 from the front port of the forceps 70, so that the digestive tract endoscope 7 is separated from the anterior middle catheter 10, the anterior external catheter 20, and the anterior wire 50.

[0049] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A device for ablation therapy of the digestive tract, characterized in that: It includes: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. A digestive tract endoscope having a forceps channel, the forceps channel having a front port and a rear port; The central conduit includes a front central conduit near the expandable component and a rear central conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The rear central conduit, the rear outer conduit, and the rear wire are inserted into the clamp channel. The expandable component is located outside the front end of the front port of the clamp channel. At the front of the front port of the clamp channel, the rear end of the front central conduit is detachably connected to the front end of the rear central conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

2. A device for ablation therapy of the digestive tract, characterized in that: It includes: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. The middle conduit includes a front middle conduit near the expandable component and a rear middle conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The lengths of the rear middle conduit, the rear outer conduit, and the rear wire are respectively greater than the lengths of the front middle conduit, the front outer conduit, and the front wire. The rear end of the front middle conduit is detachably connected to the front end of the rear middle conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

3. A device for ablation therapy of the digestive tract, characterized in that: It includes: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. A digestive tract endoscope having a forceps channel, the forceps channel having a front port and a rear port; The central conduit includes a front central conduit near the expandable component and a rear central conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The front central conduit, the front outer conduit, and the front wire are inserted into the clamp channel. The expandable component is located outside the front end of the front port of the clamp channel. At the rear of the rear port of the clamp channel, the rear end of the front central conduit is detachably connected to the front end of the rear central conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

4. A device for ablation therapy of the digestive tract, characterized in that: It includes: The catheter assembly includes a slender middle catheter and a slender outer catheter, wherein the outer catheter is sleeved on the middle catheter; An expandable component is connected to the front of the catheter assembly. The expandable component includes: a flexible electrode membrane having multiple electrodes and a support component for supporting the electrode membrane. The expandable component has a radially decreasing contraction working state and a radially increasing expansion working state. The central conduit includes a front central conduit near the expandable component and a rear central conduit away from the expandable component. The outer conduit includes a front outer conduit near the expandable component and a rear outer conduit away from the expandable component. The electrode is electrically connected to a wire, which includes a front wire near the expandable component and a rear wire away from the expandable component. The lengths of the front central conduit, the front outer conduit, and the front wire are respectively greater than the lengths of the rear central conduit, the rear outer conduit, and the rear wire. The rear end of the front central conduit is detachably connected to the front end of the rear central conduit, the rear end of the front outer conduit is detachably connected to the front end of the rear outer conduit, and the rear end of the front wire is detachably electrically connected to the front end of the rear wire.

5. The apparatus for ablation therapy of the digestive tract according to claim 1, 2, 3, or 4, characterized in that: It also includes a connector having a first connecting portion and a second connecting portion, the distance between the first connecting portion and the second connecting portion being variably set; the middle conduit being rotatably set relative to the outer conduit; the electrode membrane being wound and sleeved on the support member, the support member being a support frame and located inside the electrode membrane; the inner end of the electrode membrane being connected to the support frame; the outer end of the electrode membrane being connected to the second connecting portion of the connector; and the front section of the outer conduit being connected to the first connecting portion of the connector.

6. The apparatus for ablation therapy of the digestive tract according to claim 5, characterized in that: The first connecting part of the connector is detachably connected to the front external conduit.

7. The apparatus for ablation therapy of the digestive tract according to claim 1, 2, 3, or 4, characterized in that: It also includes an electrical connector having a first conductive portion and a second conductive portion that are electrically connected, wherein the front conductor is fixedly or detachably electrically connected to the first conductive portion, and the rear conductor is detachably electrically connected to the second conductive portion.

8. The apparatus for ablation therapy of the digestive tract according to claim 7, characterized in that: The electrical connector includes a base and a locking member detachably connected to the base. The first conductive part and the second conductive part are respectively disposed on the base. When the locking member is connected to the base, the locking member fixes the front end of the rear conductor relative to the second conductive part and forms an electrical connection.

9. The apparatus for ablation therapy of the digestive tract according to claim 7, characterized in that: The second conductive part includes an elastic conductive element with contact terminals and an insulating sealing ring arranged circumferentially around the elastic conductive element. During electrical connection, the elastic conductive element has a tendency to drive the contact terminals toward the front end of the rear conductor; and / or, there are multiple second conductive parts that are distributed side by side at intervals.

10. The apparatus for ablation therapy of the digestive tract according to claim 5, characterized in that: The rear end of the support frame is fixed on the front conduit, and the front end of the support frame is sleeved on the front conduit. When the support frame changes between the contraction working state and the expansion working state, the front end of the support frame can slide forward or backward along the axial direction of the front conduit.

11. The apparatus for ablation therapy of the digestive tract according to claim 1, 2, 3, or 4, characterized in that: The rear end of the front section of the conduit has a first locking member, and the front end of the rear section of the conduit has a second locking member that cooperates with the first locking member. A locking groove is formed on the side wall of either the first locking member or the second locking member, and the other one is inserted into the locking groove along the radial direction of the conduit and fixed relative to it.

12. The apparatus for ablation therapy of the digestive tract according to claim 1, 2, 3, or 4, characterized in that: The rear external conduit is sleeved on the rear end of the front external conduit, and the inner wall of the rear external conduit is provided with a positioning post extending radially inward along the outer conduit. The side wall of the front external conduit is provided with a positioning hole. When connected, the positioning post on the rear external conduit is inserted into the positioning hole on the front external conduit for relative fixation; and / or, the rear middle conduit is rotatably connected to the rear external conduit and sleeved on the rear end of the front middle conduit, wherein the inner wall of the rear middle conduit has a positioning post extending radially inward along the middle conduit, and the side wall of the front middle conduit is provided with a positioning hole. When connected, the positioning post on the rear middle conduit is inserted into the positioning hole on the front middle conduit for relative fixation.

13. A system for ablation therapy of the digestive tract, characterized in that, It includes the apparatus for ablation treatment of the digestive tract as described in any one of claims 1 to 4.

14. A method for assembling the device as described in claim 1, characterized in that, Includes the following steps: (1). Insert the rear middle conduit, the rear outer conduit, and the rear wire into the clamp channel from the rear port of the clamp channel, and expose the front end of the rear middle conduit, the front end of the rear outer conduit, and the front end of the rear wire outside the front port of the clamp channel; (2). At the front of the front port of the forceps, the rear end of the front middle catheter is connected to the front end of the rear middle catheter, the rear end of the front external catheter is connected to the front end of the rear external catheter, and the electrical connection is made between the rear end of the front wire and the front end of the rear wire, so that the expandable component is located on the front side of the digestive tract endoscope.

15. A method for disassembling the device as described in claim 1, characterized in that, Includes the following steps: (1). At the front of the front port of the clamp channel, the rear end of the front middle conduit and the front end of the rear middle conduit are disassembled, the rear end of the front outer conduit and the front end of the rear outer conduit are disassembled, and the rear end of the front wire and the front end of the rear wire are disassembled, so that the front middle conduit, the front outer conduit, and the front wire connected to the expandable component are separated from the rear middle conduit, the rear outer conduit, and the rear wire. (2). The posterior middle catheter, the posterior external catheter, and the posterior wire are withdrawn from the posterior port of the forceps, so that the digestive tract endoscope is separated from the posterior middle catheter, the posterior external catheter, and the posterior wire.

16. A method for assembling the device as described in claim 3, characterized in that, Includes the following steps: (1). Insert the front middle conduit, the front outer conduit, and the front wire into the clamp channel from the front port of the clamp channel, and make the rear end of the front middle conduit, the rear end of the front outer conduit, and the rear end of the front wire protrude outside the rear port of the clamp channel. (2). At the rear end of the rear port of the forceps, the rear end of the front middle catheter is connected to the front end of the rear middle catheter, the rear end of the front external catheter is connected to the front end of the rear external catheter, and the electrical connection is made between the rear end of the front wire and the front end of the rear wire, so that the expandable component is located on the front side of the external endoscope of the digestive tract.

17. A method for disassembling the device as described in claim 3, characterized in that, Includes the following steps: (1). At the rear end of the rear port of the clamp channel, the rear end of the front middle conduit and the front end of the rear middle conduit are disassembled, the rear end of the front outer conduit and the front end of the rear outer conduit are disassembled, and the rear end of the front wire and the front end of the rear wire are disassembled, so that the front middle conduit, the front outer conduit, and the front wire connected to the expandable component are separated from the rear middle conduit, the rear outer conduit, and the rear wire. (2). The anterior middle catheter, the anterior external catheter, and the anterior wire are withdrawn from the anterior port of the forceps, so that the digestive tract endoscope is separated from the anterior middle catheter, the anterior external catheter, and the anterior wire.

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