A device for ablation therapy of the digestive tract and a system comprising the same

Abstract

The application relates to a device for ablation treatment of a digestive tract and a system comprising the same, which comprises a catheter, a supporting framework located on the catheter, the supporting framework having a contracted working state and an expanded working state, the supporting framework having a framework front end and a framework rear end, at least one end being a movable end, the movable end being slidably arranged in the front-rear direction relative to the catheter, an electrode array film having a plurality of electrodes for receiving electric signals, and a driving mechanism for driving the movable end of the supporting framework to slide along the catheter, the driving mechanism comprising a capsule having an inner cavity, a medium pipe in communication with the inner cavity, the capsule having a fixed part and a movable part, the fixed part being fixedly connected to the catheter, and the movable part being connected to the movable end.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a device and system comprising ablation therapy of the digestive tract. Background Technology

[0002] In the prior art, CN114786605A discloses a device for duodenal pulsed electric field therapy, which adapts to the shape of the inner wall of the duodenum by an expandable member wrapped around a second slender body. The expandable member is generally made of a flexible polymer membrane with electrodes disposed on it. After expansion, the membrane rigidly adheres to the inner wall of the digestive tract, thereby ablating the inner wall of the duodenum. The expandable member of this device is controlled by an actuator in a handle at the proximal end to expand and close. The main problems are as follows: (1) The tortuous digestive tract and the long distance make it difficult for the force applied at the proximal end to be transmitted to the expandable member at the distal end, or there is loss in the transmission process, making it difficult to control the expansion or closure of the expandable member; (2) The expandable member needs to resist the pressure of the inner wall of the duodenum when it expands, which further exacerbates the difficulty of controlling the expandable member.

[0003] Therefore, how to design a device that is easy to operate, labor-saving, and highly reliable for ablation treatment of the digestive tract is an area of ​​exploration for those skilled in the art. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an apparatus for ablation treatment of the digestive tract and a system including the same.

[0005] To solve the above technical problems, the technical solution adopted in the first aspect of the present invention is as follows:

[0006] A device for ablation therapy of the digestive tract, comprising:

[0007] Slender tubes;

[0008] A support frame is located on the conduit. The support frame has a contraction working state and an expansion working state. The support frame has a front end and a rear end, and at least one end is a movable end. The movable end is slidably disposed relative to the conduit in the front-back direction.

[0009] An electrode array film has multiple electrodes for receiving electrical signals. The electrode array film is connected to the support frame. When the support frame is in an expanded working state, the electrode array film is open on the support frame. When the support frame is in a contracted working state, the electrode array film is contracted on the support frame.

[0010] A driving mechanism is provided for driving the movable end of the support frame to slide along the conduit, so that the two ends of the support frame move closer or further apart, thereby switching the support frame between an expansion working state and a contraction working state; the driving mechanism includes a bladder with an inner cavity and a medium tube communicating with the inner cavity, the bladder having a fixed part and a movable part, the fixed part being fixedly connected to the conduit, and the movable part being connected to the movable end.

[0011] In one embodiment, a tension spring is connected between the fixed part and the movable part, and when the support frame is in an expanded working state, the tension spring has an elastic force that causes the fixed part and the movable part to approach each other.

[0012] In one embodiment, the tension spring is sleeved on the bladder, or the tension spring is embedded in the bladder, or the tension spring is disposed in the inner cavity of the bladder, with one end of the tension spring fixedly connected to the fixing part and the other end of the tension spring fixedly connected to the movable part.

[0013] In one embodiment, the fixed part is a rigid component, and the movable part is also a rigid component.

[0014] In one embodiment, the capsule is made of a soft material and is a non-compliant balloon.

[0015] In one embodiment, the capsule has folds.

[0016] In one embodiment, the capsule includes an inner capsule layer and an outer capsule layer located outside the inner capsule layer, the inner capsule layer surrounding the catheter, and the outer capsule layer and the inner capsule layer forming the inner lumen.

[0017] The technical solution adopted in the second aspect of this invention is as follows:

[0018] A device for ablation therapy of the digestive tract, comprising:

[0019] Slender tubes;

[0020] A support frame is located on the conduit. The support frame has a contraction working state and an expansion working state. The support frame has a front end and a rear end, and at least one end is a movable end. The movable end is slidably disposed relative to the conduit in the front-back direction.

[0021] An electrode array film has multiple electrodes for receiving electrical signals. The electrode array film is connected to the support frame. When the support frame is in an expanded working state, the electrode array film is open on the support frame. When the support frame is in a contracted working state, the electrode array film is contracted on the support frame.

[0022] A driving mechanism is used to drive the movable end of the support frame to slide along the conduit, so that the two ends of the support frame move closer or further apart, thereby switching the support frame between an expanded working state and a contracted working state; the driving mechanism includes a hydraulic cylinder with an inner cavity and a medium pipe communicating with the inner cavity, the hydraulic cylinder having a cylinder body and a piston, the cylinder body being fixedly connected to the conduit, and the piston being connected to the movable end, the cylinder body being a fixed part and the piston being a movable part.

[0023] In one embodiment, the cylinder body includes an inner cylinder body and an outer cylinder body located outside the inner cylinder body, the inner cylinder body surrounding the conduit, and the inner cylinder body, the outer cylinder body, and the piston forming the inner cavity.

[0024] In one embodiment, the rear end of the skeleton includes a rear connecting seat, which is sleeved on the conduit and slidably connected to the conduit in a front-rear direction. The movable part is connected to the rear connecting seat, and at least a portion of the fixed part is located at the rear of the movable part.

[0025] In one embodiment, a sheath is fitted onto the conduit at the rear of the support frame, the medium tube is disposed between the sheath and the conduit, a rear guide cap is connected to the sheath, the fixing part is located inside the rear guide cap, and part of the inner cavity is also located inside the rear guide cap.

[0026] In one embodiment, the front end of the skeleton includes a front connecting seat, which is sleeved on the conduit and slidably connected to the conduit in a front-rear direction. The movable part is connected to the front connecting seat, and at least a portion of the fixed part is located at the front of the movable part.

[0027] In one embodiment, a guide cap is connected to the conduit at the front of the support frame, the fixing part is located inside the guide cap, and part of the inner cavity is also located inside the guide cap.

[0028] In one embodiment, the support frame includes multiple X-shaped linkage mechanisms. Each X-shaped linkage mechanism includes a first link, a second link, and a side link. The first link and the second link intersect and are pivotally connected at the intersection. The side link has a sliding groove extending in the front-rear direction. One of the outer ends of the first link and the second link is pivotally connected to the side link, and the other outer end is located in the sliding groove and is slidably connected to the side link in the front-rear direction. The inner end of the first link is pivotally connected to a rear connecting seat, and the inner end of the second link is pivotally connected to a front connecting seat. The front connecting seat and the rear connecting seat are respectively sleeved on the conduit. One of the connecting seats is fixedly connected to the conduit, and the other connecting seat is slidably disposed on the conduit in the front-rear direction.

[0029] In one embodiment, the side rods are parallel to the conduit within the support frame, and each of the side rods is arranged circumferentially around the conduit.

[0030] To solve the above technical problems, the technical solution adopted in the third aspect of the present invention is as follows:

[0031] A system for ablation therapy of the digestive tract, comprising the apparatus for ablation therapy of the digestive tract as described above, and further comprising:

[0032] A signal generator configured to generate an electrical signal for treatment and electrically connected to the electrodes;

[0033] A pressure source is connected to the medium pipe. When the pressure source is a positive pressure source, it is used to inject a medium into the inner cavity through the medium pipe.

[0034] An operating handle is attached to the proximal end of the catheter.

[0035] In one embodiment, when the pressure source is a negative pressure source, the pressure source is used to draw media from the inner cavity through a media pipe.

[0036] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0037] a. The device for ablation treatment of the digestive tract in this invention improves the reliability of the device by directly setting a drive mechanism at the distal end to drive the movable end of the support frame to slide along the catheter, thereby enabling the support frame to switch between an expansion working state and a contraction working state.

[0038] b. The device for ablation treatment of the digestive tract in this invention uses a medium to move the movable part of the cavity, thereby driving the movable end of the supporting skeleton to slide. The use of the medium reduces or even eliminates the influence of the tortuous digestive tract and long distance on force transmission.

[0039] c. The device for ablation treatment of the digestive tract in this invention controls the electrode array membrane to move closer to and further away from the treatment site by setting a novel driving mechanism. This driving mechanism has a simple structure and is easy to control. Attached Figure Description

[0040] Figure 1 This is a front view of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, in which the supporting frame is in a contracted working state.

[0041] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0042] Figure 3 for Figure 2 An enlarged view of part B;

[0043] Figure 4 for Figure 2 An enlarged view of part C;

[0044] Figure 5 For the appendix Figure 1 The image shown is a right-side magnified view of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, with the supporting frame in a contracted working state at this time.

[0045] Figure 6 This is a front view of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, in which the supporting skeleton is in an expanded working state.

[0046] Figure 7 for Figure 6 A cross-sectional view along the DD direction;

[0047] Figure 8 for Figure 7 An enlarged view of part E in the image;

[0048] Figure 9 This is a three-dimensional enlarged view of the distal end of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, in which the supporting frame is in an expanded working state.

[0049] Figure 10 For the appendix Figure 5 The image shown is a right-side magnified view of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, with the supporting frame in an expanded working state.

[0050] Figure 11 The three-dimensional enlarged view of the distal end of the system for ablation treatment of the digestive tract in Embodiment 1 of the present invention omits the electrode array membrane and the posterior guide cap. At this time, the support frame is in a contracted working state.

[0051] Figure 12 This is a three-dimensional enlarged view of the distal electrode array membrane of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, in which the supporting skeleton is in a contracted working state.

[0052] Figure 13 This is a front view of the distal electrode array membrane of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, at which time the supporting frame is in an expanded working state.

[0053] Figure 14 This is a three-dimensional view of the system for ablation treatment of the digestive tract according to Embodiment 1 of the present invention, showing the removal of the electrode array membrane, with the supporting frame in an expanded working state.

[0054] Figure 15 This is an enlarged cross-sectional view of the distal portion of the system for ablation treatment of the digestive tract according to Embodiment 2 of the present invention, in which the supporting frame is in a contracted working state.

[0055] Figure 16 This is an enlarged cross-sectional view of the distal portion of the system for ablation treatment of the digestive tract according to Embodiment 2 of the present invention, in which the supporting frame is in an expanded working state.

[0056] Figure 17 This is a cross-sectional enlarged view of the distal portion of the system for ablation treatment of the digestive tract according to Embodiment 3 of the present invention, in which the supporting frame is in a contracted working state.

[0057] Figure 18 This is a cross-sectional enlarged view of the distal portion of the system for ablation treatment of the digestive tract according to Embodiment 3 of the present invention, in which the supporting skeleton is in an expanded working state.

[0058] Figure 19 This is a magnified front view of the distal portion of the system for ablation treatment of the digestive tract according to Embodiment 4 of the present invention. At this time, the support frame is in an expanded working state, and the electrode array membrane and the rear guide cap are omitted.

[0059] Figure 20 This is a magnified front view of the distal portion of the system for ablation treatment of the digestive tract according to Embodiment 5 of the present invention. At this time, the support frame is in an expanded working state, and the electrode array membrane and the rear guide cap are omitted.

[0060] Figure 21 This is a magnified front view of the distal portion of the system for ablation treatment of the digestive tract according to Embodiment 6 of the present invention. At this time, the support frame is in an expanded working state, and the electrode array membrane and the posterior guide cap are omitted.

[0061] Icon labels:

[0062] 1-Signal generator; 2-Pressure source; 3-Conduit; 4-Operating handle; 5-Support frame; 51-First connecting rod; 511-Inner end of first connecting rod; 512-Outer end of first connecting rod; 52-Second connecting rod; 521-Inner end of second connecting rod; 522-Outer end of second connecting rod; 53-Side rod; 531-Sliding groove; 54-Rear connecting seat; 55-Front connecting seat; 56-Rear connecting rod; 57-Front connecting rod; 58-Hexagonal structure; 59-First arched component; 60-Second arched component; 6 1-Rear end of braided support; 62-Front end of braided support; 7-Electrode array membrane; 81-Bag body; 811-Fixing part; 812-Moving part; 813-Bag body; 8131-Inner capsule layer; 8132-Outer capsule layer; 82-Media tube; 83-Tension spring; 84-Hydraulic cylinder; 841-Cylinder body; 8411-Inner cylinder body; 8412-Outer cylinder body; 842-Piston; 8421-Limiting part; 8422-Transverse part; 9-Sheath tube; 10-Front guide cap; 11-Rear guide cap. Detailed Implementation

[0063] The present invention will be further described below with reference to embodiments. In the description of the present invention, the digestive tract refers to the oral cavity, esophagus, stomach, duodenum, small intestine, large intestine, anus, etc., and the term "proximal" refers to the end closer to the operator, while "distal" refers to the end farther from the operator, such as... Figure 1 As shown in the figure, the right direction is the relative "distal" or "anterior", and the left direction is the relative "proximal" or "posterior". In the figure, the up and down direction is "inner" closer to the catheter and "outer" farther from the catheter. The above definitions of directions are only for the convenience of describing the present invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0064] Example 1

[0065] like Figure 1-14 As shown, the system for ablation treatment of the digestive tract in this embodiment includes an apparatus for ablation treatment of the digestive tract, a signal generator 1, and a pressure source 2.

[0066] The device for ablation therapy of the digestive tract includes a slender catheter 3, an operating handle 4, a support frame 5, an electrode array membrane 7, a drive mechanism, a sheath 9, an anterior guide cap 10, and a posterior guide cap 11, wherein the operating handle 4 is located at the proximal end, and the support frame 5, the electrode array membrane 7, the drive mechanism, the sheath 9, the anterior guide cap 10, and the posterior guide cap 11 are located at the distal end.

[0067] The catheter 3 is used to insert guide wires and other components. The operating handle 4 is connected to the proximal end of the catheter 3 and is used by the operator to hold it.

[0068] The support frame 5 is located on the conduit 3 and has a contraction working state and an expansion working state. The support frame 5 has a front end and a rear end, at least one of which is a movable end. The movable end is slidably disposed relative to the conduit 3 in the front-rear direction. Specifically, in this embodiment, the rear end of the frame is the movable end, and the front end of the frame is fixedly disposed relative to the conduit 3. The support frame 5 includes multiple X-shaped linkage mechanisms. Each X-shaped linkage mechanism includes a first link 51, a second link 52, and a side link 53. The first link 51 and the second link 52 intersect and are pivotally connected at the intersection. The side link... A sliding groove 531 extending in the front-to-back direction is provided on the 53. The outer end 512 of the first connecting rod is pivotally connected to the side rod 53. The outer end 522 of the second connecting rod is located in the sliding groove 531 and is slidably connected to the side rod 53 in the front-to-back direction. The inner end 511 of the first connecting rod is pivotally connected to a rear connecting seat 54, which is the rear end of the frame. The inner end 521 of the second connecting rod is pivotally connected to a front connecting seat 55. The front connecting seat 55 and the rear connecting seat 54 are respectively sleeved on the guide tube 3. The front connecting seat 55 is fixedly connected to the guide tube 3, and the rear connecting seat 54 is slidably disposed on the guide tube 3 in the front-to-back direction. In this embodiment, the number of connecting rods is 6. In other embodiments, the number of connecting rods can be set to 4-10. The side rods 53 are parallel to the guide tube 3 in the support frame 5, and each side rod 53 is arranged circumferentially around the guide tube 3.

[0069] The electrode array membrane 7 has multiple electrodes for receiving electrical signals and is connected to the support frame 5. When the support frame 5 is in an expanded state, the electrode array membrane 7 is open on the support frame 5; when the support frame 5 is in a contracted state, the electrode array membrane 7 is contracted on the support frame 5. The electrode array membrane 7 can be made of an elastic material, ensuring it always wraps around the support frame 5 in both the contracted and expanded states. Specifically, the difference between the length of the side rod 53 in the front-back direction and the width of the electrode array membrane 7 in the front-back direction is less than 1.5 mm, preferably less than 0.5 mm or equal. By setting the widths of the side rod 53 and the electrode array membrane 7 to be similar in the front-back direction, it is ensured that the electrode array membrane 7 can be well supported by the support frame 5, allowing it to closely adhere to the treatment site (such as the duodenum) and achieve a precise ablation effect.

[0070] The driving mechanism drives the movable end of the support frame 5 to slide along the conduit 3, causing the two ends of the support frame 5 to move closer or further apart, thereby switching the support frame 5 between an expansion working state and a contraction working state. The driving mechanism includes a bladder 81 with an inner cavity and a medium tube 82 communicating with the inner cavity. The bladder 81 has a fixed part 811 and a movable part 812. The fixed part 811 is fixedly connected to the conduit 3, and the movable part 812 is connected to the movable end. Specifically, in this embodiment, the bladder 81 includes a bladder body 813, and the movable part 812 is connected to the rear connecting seat 54. The fixed part 811 is located behind the bladder body 813, and the movable part 812 is located in front of the bladder body 813. A tension spring 83 is connected between the fixed part 811 and the movable part 812. One end of the tension spring 83 is fixedly connected to the fixed part 811, and the other end of the tension spring 83 is fixedly connected to the movable part 812. The tension spring 83 is specifically sleeved on the bladder 81. In other embodiments... In this example, the spring 83 can be embedded in the bladder body 81, or the spring 83 can be disposed in the inner cavity. When the support frame is in an expanded working state, the spring 83 has an elastic force that causes the fixed part 811 and the movable part 812 to move closer together. In other embodiments, the spring 83 can be omitted, and the relative movement of the fixed part 811 and the movable part 812 can be controlled by injecting or removing a medium into the inner cavity. In other embodiments, a compression spring can also be provided, which has an elastic force that causes the fixed part 811 and the movable part 812 to move away from each other. In this embodiment, the fixed part 811 is a rigid member, and the movable part 812 is also a rigid member, so as to better cooperate with the spring 83 and the movable end of the support frame 5. The bladder body 813 is made of soft material and is a non-compliant balloon. In other embodiments, the entire bladder body 81 can also be made of soft material and be a non-compliant balloon, or the bladder body 81 can be configured with a pleated structure.

[0071] In this embodiment, the capsule body 813 includes an inner capsule layer 8131 disposed inside and an outer capsule layer 8132 disposed outside the inner capsule layer 8131. The inner capsule layer 8131 and the outer capsule layer 8132 are connected to form an inner cavity. The inner capsule layer 8131 surrounds the catheter 3. In this arrangement, the medium is wrapped between the inner capsule layer 8131 and the outer capsule layer 8132. The catheter 3 does not directly contact the medium, ensuring the airtightness of the inner cavity, reducing the possibility of medium leakage, and improving the safety and reliability of the device for ablation treatment of the digestive tract of the present invention during use.

[0072] A sheath tube 9 is fitted onto the catheter 1 at the rear of the supporting frame 5. The medium tube 82 is located between the sheath tube 9 and the catheter 3. A rear guide cap 11 is connected to the sheath tube 9. The fixing part is located inside the rear guide cap 11, and part of the cavity is also located inside the rear guide cap 11. A front guide cap 10 is also provided. The catheter 3 at the front of the supporting frame 5 is located in the front guide cap 10. By setting the sheath tube 9, the medium tube 82 and the catheter 3 are both housed within it, which helps to protect their internal structure and makes it less likely to damage the inner wall of the digestive tract when moving forward or backward in the digestive tract. The rear guide cap 11 is a cone shape that is thicker at the front and thinner at the back, and the front guide cap 10 is a cone shape that is thinner at the front and thicker at the back. The front guide cap 10 and the rear guide cap 11 facilitate the movement of this device through the treatment site.

[0073] like Figure 1-2 As shown in Figures 6-7, the signal generator 1 is configured to generate an electrical signal for treatment and is electrically connected to the electrode to apply a pulsed electric field to the surface tissue of the treatment site (such as the duodenum) for ablation treatment. The present invention does not limit the specific parameters such as voltage, frequency and pulse width applied by the signal generator.

[0074] like Figure 1-2 As shown in Figures 6-7, pressure source 2 is connected to medium pipe 82. When pressure source 2 is a positive pressure source, it is used to inject medium into the inner cavity through medium pipe 82. When pressure source 2 is a negative pressure source, it is used to extract medium from the inner cavity through medium pipe 82. In this embodiment, pressure source 2 is a positive pressure source to cooperate with tension spring 83. In other embodiments, pressure source 2 is a negative pressure source to cooperate with compression spring. The medium can be liquid saline solution or gas; there is no limitation here.

[0075] Example 2

[0076] like Figure 15-16 As shown, the main difference between this embodiment and Embodiment 1 is that: in this embodiment, the inner end 521 of the second connecting rod is connected to a front connecting seat 55, which is a movable end. The front connecting seat 55 is sleeved on the conduit 3 and slidably connected to the conduit 3 in the front-back direction. The movable part 812 is connected to the front connecting seat 55, and the fixed part 811 is located in front of the movable part 812. The outer end 522 of the second connecting rod is pivotally connected to the side rod 53. The outer end 512 of the first connecting rod is located in the sliding groove 531 and slidably connected to the side rod 53 in the front-back direction. A front guide cap 10 is connected to the conduit 3 at the front of the support frame 5. The fixed part is located inside the front guide cap 10, and part of the cavity is also located inside the front guide cap 10.

[0077] Example 3

[0078] like Figure 17-18As shown, the main difference between this embodiment and Embodiment 1 is that: in this embodiment, the driving mechanism includes a hydraulic cylinder 84 with an inner cavity. The hydraulic cylinder 84 has a cylinder body 841 and a piston 842. The cylinder body 841 is a fixed part, and the piston 842 is a movable part. An inner cavity is provided inside the cylinder body 841. The piston 842 moves relative to the cylinder body 841 to control the size of the inner cavity. The inner end 511 of the first connecting rod is connected to a rear connecting seat 54. The rear connecting seat 54 is a movable end. At least part of the cylinder body 841 is located at the rear of the piston 842. The cylinder body 841 is located behind the rear connecting seat 54. The piston 842 is connected to the rear connecting seat 54. Specifically, the piston 842 is L-shaped and includes a limiting part 8421 extending in the inner and outer directions and a transverse part 8422 extending in the guide direction. The limiting part 8421 is located in the inner cavity, as shown in the figure. Figure 17 As shown, when the piston 842 is in its rear limit position, the limiting part 8421 abuts against the rear inner wall of the cylinder 841. At this time, the support frame 5 is in a retracted working state, as shown. Figure 18 As shown, when the piston 842 is in the front limit position, the limiting part 8421 abuts against the front inner wall of the cylinder 841. At this time, the support frame 5 is in an expanded working state. Of course, in other embodiments, similar to Embodiment 2, the inner end 521 of the second connecting rod is connected to the front connecting seat 55, and at least part of the cylinder is located at the front of the piston 842, with the piston 842 connected to the front connecting seat 55. In this embodiment, the hydraulic cylinder 84 can control the movement distance of the piston 842 within the cylinder 841 according to actual needs, thereby precisely controlling the diameter of the expanded support frame 5, so that the electrode array membrane 7 has a diameter adapted to the target tissue, can closely adhere to the treatment site (such as the duodenum), and achieve a precise ablation effect.

[0079] In this embodiment, the cylinder 841 includes an inner cylinder 8411 disposed inside and an outer cylinder 8412 disposed outside the inner cylinder 8411. The outer cylinder 8412 has a first opening for communicating with the medium tube 82 and a second opening for the lateral portion 8422 of the piston 842 to pass through. The inner cylinder 8411 extends in the front-rear direction and surrounds the conduit 3. The inner cylinder 8411, the outer cylinder 8412, and the limiting portion 8421 of the piston 842 are jointly connected to form the inner cavity. With this arrangement, the medium is wrapped between the inner cylinder 8411, the outer cylinder 8412, and the lateral portion 8422 of the piston 842. The conduit 3 does not directly contact the medium, ensuring the airtightness of the inner cavity, reducing the possibility of medium leakage, and improving the safety and reliability of the device for ablation treatment of the digestive tract of the present invention during use.

[0080] Example 4

[0081] like Figure 19As shown, the main difference between this embodiment and embodiment 1 is that the structure of the supporting frame 5 is different in this embodiment. It includes multiple front connecting rods 57, multiple rear connecting rods 56, multiple hexagonal structures 58 disposed between the front connecting rods 57 and the rear connecting rods 56, and multiple side rods 53. The rear end of the rear connecting rod 56 is connected to a rear connecting seat 54. The rear connecting seat 54 is a movable end. The rear connecting seat 54 is sleeved on the guide tube 3 and slidably connected to the guide tube 3 in the front-back direction. The two diagonal parts of the hexagonal structure 58 are respectively connected to the front connecting rod 56 and the rear connecting rod 57. Side rods 53 are disposed between adjacent hexagonal structures 58.

[0082] Example 5

[0083] like Figure 20 As shown, the main difference between this embodiment and embodiment 1 is that the structure of the supporting frame 5 is different in this embodiment. It includes 8 linkage mechanisms. The linkage structure includes a first arched member 59 protruding from the inside to the outside, a second arched member 60 protruding from the outside to the inside, and side rods 53 fixedly connected to the two outer ends of the second arched member 60. The first arched member 59 is fixedly connected to the arched part of the second arched member 60. The rear end of the first arched member 59 is connected to a rear connecting seat 54. The rear connecting seat 54 is a movable end. The rear connecting seat 54 is sleeved on the guide tube 3 and slidably connected to the guide tube 3 in the front-back direction.

[0084] Example 6

[0085] like Figure 21 As shown, the main difference between this embodiment and embodiment 1 is that the structure of the supporting frame 5 is different in this embodiment. It is a braided frame with a hollowed-out design. It has a front end 62 and a rear end 61. The front end 62 is fixedly connected to the conduit 3, and the rear end 61 is a movable end that is sleeved on the conduit 3 and slidably connected to the conduit 3 in the front-back direction.

[0086] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0087] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for ablation therapy of the digestive tract, characterized in that, It includes: Slender tubes; A support frame is located on the conduit. The support frame has a contraction working state and an expansion working state. The support frame has a front end and a rear end, and at least one end is a movable end. The movable end is slidably disposed relative to the conduit in the front-back direction. An electrode array film has multiple electrodes for receiving electrical signals. The electrode array film is connected to the support frame. When the support frame is in an expanded working state, the electrode array film is open on the support frame. When the support frame is in a contracted working state, the electrode array film is contracted on the support frame. A driving mechanism is provided for driving the movable end of the support frame to slide along the conduit, so that the two ends of the support frame move closer or further apart, thereby switching the support frame between an expansion working state and a contraction working state; the driving mechanism includes a bladder with an inner cavity and a medium tube communicating with the inner cavity, the bladder having a fixed part and a movable part, the fixed part being fixedly connected to the conduit, and the movable part being connected to the movable end.

2. The device for ablation treatment of the digestive tract according to claim 1, characterized in that: A tension spring connects the fixed part and the movable part. When the support frame is in an expanded working state, the tension spring has an elastic force that causes the fixed part and the movable part to move closer together.

3. The device for ablation treatment of the digestive tract according to claim 2, characterized in that: The tension spring is sleeved on the bladder body, or the tension spring is embedded in the bladder body, or the tension spring is disposed in the inner cavity of the bladder body. One end of the tension spring is fixedly connected to the fixing part, and the other end of the tension spring is fixedly connected to the movable part.

4. The device for ablation treatment of the digestive tract according to claim 1, characterized in that: The fixed part is a rigid component, and the movable part is also a rigid component.

5. The apparatus for ablation therapy of the digestive tract according to claim 1, characterized in that: The capsule is made of a soft material and is a non-compliant balloon.

6. The apparatus for ablation therapy of the digestive tract according to claim 5, characterized in that: The capsule has folds.

7. The apparatus for ablation therapy of the digestive tract according to claim 1, characterized in that: The capsule includes an inner capsule layer and an outer capsule layer located outside the inner capsule layer. The inner capsule layer surrounds the catheter, and the outer capsule layer and the inner capsule layer form the inner lumen.

8. A device for ablation therapy of the digestive tract, characterized in that, It includes: Slender tubes; A support frame is located on the conduit. The support frame has a contraction working state and an expansion working state. The support frame has a front end and a rear end, and at least one end is a movable end. The movable end is slidably disposed relative to the conduit in the front-back direction. An electrode array film has multiple electrodes for receiving electrical signals. The electrode array film is connected to the support frame. When the support frame is in an expanded working state, the electrode array film is open on the support frame. When the support frame is in a contracted working state, the electrode array film is contracted on the support frame. A driving mechanism is used to drive the movable end of the support frame to slide along the conduit, so that the two ends of the support frame move closer or further apart, thereby switching the support frame between an expansion working state and a contraction working state. The driving mechanism includes a hydraulic cylinder with an inner cavity and a medium pipe communicating with the inner cavity. The hydraulic cylinder has a cylinder body and a piston. The cylinder body is fixedly connected to the conduit, and the piston is connected to the movable end. The cylinder body is a fixed part, and the piston is a movable part.

9. The apparatus for ablation therapy of the digestive tract according to claim 8, characterized in that: The cylinder body includes an inner cylinder body and an outer cylinder body located outside the inner cylinder body. The inner cylinder body surrounds the conduit, and the inner cylinder body, the outer cylinder body, and the piston surround to form the inner cavity.

10. The apparatus for ablation therapy of the digestive tract according to claim 1 or 8, characterized in that: The rear end of the skeleton includes a rear connecting seat, which is sleeved on the conduit and slidably connected to the conduit in the front-rear direction. The movable part is connected to the rear connecting seat, and at least a portion of the fixed part is located at the rear of the movable part.

11. The apparatus for ablation treatment of the digestive tract according to claim 10, characterized in that: A sheath is fitted onto the conduit at the rear of the support frame. The medium tube is positioned between the sheath and the conduit. A rear guide cap is connected to the sheath. The fixing part is located inside the rear guide cap, and part of the inner cavity is also located inside the rear guide cap.

12. The apparatus for ablation treatment of the digestive tract according to claim 1 or 8, characterized in that: The front end of the skeleton includes a front connecting seat, which is sleeved on the conduit and slidably connected to the conduit in the front-rear direction. The movable part is connected to the front connecting seat, and at least part of the fixed part is located at the front of the movable part.

13. The apparatus for ablation treatment of the digestive tract according to claim 12, characterized in that: A guide cap is connected to the conduit at the front of the support frame. The fixing part is located inside the guide cap, and part of the inner cavity is also located inside the guide cap.

14. The apparatus for ablation therapy of the digestive tract according to claim 1 or 8, characterized in that: The supporting frame includes multiple X-shaped linkage mechanisms. Each X-shaped linkage mechanism includes a first link, a second link, and a side link. The first link and the second link intersect and are pivotally connected at the intersection. The side link has a sliding groove extending in the front-back direction. One of the outer ends of the first link and the second link is pivotally connected to the side link, and the other outer end is located in the sliding groove and is slidably connected to the side link in the front-back direction. The inner end of the first link is pivotally connected to a rear connecting seat, and the inner end of the second link is pivotally connected to a front connecting seat. The front connecting seat and the rear connecting seat are respectively sleeved on the conduit. One of the connecting seats is fixedly connected to the conduit, and the other connecting seat is slidably disposed on the conduit in the front-back direction.

15. The apparatus for ablation therapy of the digestive tract according to claim 14, characterized in that: The side rods are parallel to the conduit within the support frame, and each side rod is arranged circumferentially around the conduit.

16. 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 15, and further includes: A signal generator configured to generate an electrical signal for treatment and electrically connected to the electrodes; A pressure source is connected to the medium pipe. When the pressure source is a positive pressure source, it is used to inject a medium into the inner cavity through the medium pipe. An operating handle is attached to the proximal end of the catheter.

17. The system for ablation treatment of the digestive tract according to claim 16, characterized in that: When the pressure source is a negative pressure source, the pressure source is used to extract the medium from the inner cavity through the medium pipe.

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