Ablation catheter assembly

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an ablation catheter assembly which comprises an ablation catheter and an ablation support electrode, and the ablation support electrode is arranged on the ablation catheter and can move in the radial direction of the ablation catheter under the action of external force. The inner end of the wire penetrates through the ablation catheter and then is electrically connected with the ablation support electrode, and the outer end of the wire extends out of the ablation catheter and is used for being connected with an external power source. The ablation catheter further comprises a separating mechanism, the separating mechanism is arranged on the ablation catheter, and the separating mechanism tensions the wire under the action of external force until the wire is separated from the ablation stent electrode. Due to the structure, positioning can be controlled, an electric field can be controlled, and operation steps are simplified.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology and provides an ablation catheter assembly for palliative treatment of liver, gallbladder and pancreatic tumors. Background Technology

[0002] Existing ablation tubes include an ablation catheter, an ablation head at the tip of the catheter, and a lead wire attached to the body of the catheter, one end of which is electrically connected to the ablation head. The lead wire includes a positive and a negative electrode. Some ablation tubes also include a thermocouple, which is fixedly connected to the conductive part of the ablation head. During energy release therapy with the ablation catheter, the generation of energy inevitably causes a series of muscle tremors, affecting the position of the ablation catheter and the accuracy of the treatment. Furthermore, the different sizes of the bile ducts in different patients and the varying degrees of electrode coverage can affect the treatment performance.

[0003] In summary, traditional ablation treatments still require the placement of stents in the treated area. Therefore, there is a need to develop an ablation catheter assembly that is controllable in positioning, has a controllable electric field, and simplifies the doctor's operating procedures for palliative ablation of tumors in the liver, bile ducts, and pancreas. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an ablation catheter assembly with controllable positioning, controllable electric field and simplified operation steps.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides an ablation catheter assembly, including

[0007] ablation catheter,

[0008] An ablation stent electrode is disposed on the ablation catheter and is capable of moving along the radial direction of the ablation catheter under the action of external force;

[0009] A wire, the inner end of which passes through the ablation catheter and is electrically connected to the ablation stent electrode, and the outer end of which extends out of the ablation catheter and is used to connect to an external power source;

[0010] in:

[0011] It also includes a detachment mechanism disposed on the ablation catheter, which tensions the wire under external force until the wire detaches from the ablation stent electrode.

[0012] Furthermore, the ablation catheter is provided with an electrode driving mechanism;

[0013] In the first working state, the electrode driving mechanism is in close contact with the ablation stent electrode and drives the ablation stent electrode to move along the radial direction of the ablation catheter;

[0014] In the second working state, the electrode driving mechanism is disengaged from the ablation stent electrode.

[0015] Furthermore, the electrode driving mechanism includes an inflatable balloon disposed on the ablation catheter, the inflatable balloon being connected to a pressurizing device disposed outside the ablation catheter, and the inflatable balloon switching between a first working state and a second working state under the drive of the pressurizing device.

[0016] Furthermore, the disengagement mechanism includes

[0017] A sleeve having a hollow chamber, the sleeve being fitted onto the ablation catheter;

[0018] A traction ring is disposed within the hollow cavity and slides on the inner wall of the sleeve;

[0019] The traction wire has its inner end connected to the traction ring, and its outer end passes through the wire hole a on the inner wall of the sleeve and extends out of the proximal end of the ablation catheter and is connected to the external power unit.

[0020] Furthermore, the sleeve is provided with a wire-passing hole b;

[0021] The outer end of the wire passes through the wire hole b and wire hole a located on the sleeve in sequence and then comes out from the tail of the ablation catheter.

[0022] Furthermore, the ablation catheter is provided with cavities a, b, c, d, and e, and the wires include a temperature-sensitive wire, a positive wire, and a negative wire;

[0023] The cavity a is used to install a hydrophilic guidewire, and the ablation catheter is provided with a Luer connector connected to the cavity a for guiding the hydrophilic guidewire;

[0024] The temperature-sensing wire is provided in the cavity b;

[0025] The positive electrode wire is disposed in the cavity c;

[0026] The cavity d is used to communicate with the inner cavity of the electrode driving mechanism provided on the ablation catheter, and the ablation catheter is provided with a pressure connector communicating with the cavity d.

[0027] The negative electrode wire is provided in the cavity e.

[0028] Furthermore, cavities b, c, d, and e are evenly arranged circumferentially around cavity a along the radial direction of the ablation catheter, and the ablation catheter is provided with an opening connecting cavity d to the inflatable balloon of the electrode driving mechanism.

[0029] Furthermore, the inner end of the temperature-sensing wire is electrically connected to the ablation stent electrode, and the outer end of the temperature-sensing wire passes through the assembly hole, the wire passage hole b and the wire passage hole a located on the ablation catheter in sequence, and then extends out from the proximal end of the cavity b and is connected to an external power source.

[0030] The outer end of the positive electrode wire passes through the assembly hole, wire hole b and wire hole a in sequence, and then extends out from the proximal end of the cavity c and is connected to an external power source.

[0031] The outer end of the negative electrode wire passes through the assembly hole, wire hole b and wire hole a in sequence, and then extends out from the proximal end of the cavity e and is connected to an external power source.

[0032] Furthermore, the outer end of the traction wire passes through the wire hole a and is led out from the proximal end of the cavity b, and / or cavity c, and / or cavity e on the ablation catheter, and is connected to an external power unit. The external power unit is a sliding button for applying external force to the traction ring, which is disposed on the handle housing.

[0033] The handle housing is provided with a cable connector. The inner end of the cable connector is inserted into the handle housing as a whole and is electrically connected to the temperature sensing wire, negative wire and positive wire extending from the ablation conduit. The outer end of the cable connector is used to connect to an external power source.

[0034] Furthermore, the ablation stent electrode includes at least two conductive stent sections and at least one insulating stent section, the insulating stent section being disposed between two adjacent conductive stent sections, and each conductive stent section being electrically connected to the conductor. At least one conductive stent section is electrically connected to the inner end of the temperature-sensing conductor.

[0035] The beneficial effects of this utility model are:

[0036] For palliative treatment of patients with malignant biliary obstruction, irreversible electroporation ablation is employed. Using this structure, endoscopic guidance under ERCP is used to reach the duodenal papilla. Guided by a hydrophilic guidewire and CT imaging, the ablation catheter's tip reaches the tumor site. External pressure is applied to the pressure outlet tube, causing the balloon to inflate and the ablation stent electrode to contact the body's natural cavities. This allows the ablation stent electrode, with its embedded wire, to be precisely positioned at the tumor location, ensuring a stable electrode position during treatment. This avoids electrode displacement caused by uncontrollable muscle spasms or other movements during the ablation process, increasing treatment accuracy and achieving controllable positioning. The ablation stent electrode setup changes the traditional procedure. The electrode itself forms a scaffold and electrode treatment unit, ensuring full contact with the treatment area and a tight fixation, creating a controllable electric field and improving treatment efficacy. It also reduces the need for secondary stent implantation by the surgeon, improving surgical efficiency and simplifying the procedure.

[0037] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0039] Figure 1 This is a schematic diagram of the structure of this utility model;

[0040] Figure 2 This is a schematic diagram of the ablation tube of this utility model;

[0041] Figure 3 This is a schematic diagram of the structure of the ablation stent electrode of this utility model;

[0042] Figure 4 This is a schematic diagram of the cross-section of the ablation catheter of this utility model;

[0043] Figure 5 This is a three-dimensional structural diagram of the electrode separation mechanism of the ablation stent of this utility model;

[0044] Figure 6 This is a schematic diagram of the internal structure of the ablation stent electrode separation mechanism of this utility model;

[0045] Figure 7This is a schematic diagram of the assembly hole of the ablation catheter of this utility model.

[0046] Reference numerals: 1. Ablation catheter; 11. Cavity a; 12. Cavity b; 13. Cavity c; 14. Cavity d; 15. Cavity e; 16. Assembly hole; 2. Ablation stent electrode; 21. Conductive stent section; 22. Insulating stent section; 3. Wire; 31. Temperature sensing wire; 32. Positive electrode wire; 4. Disengagement mechanism; 41. Sleeve; 42. Hollow chamber; 43. Traction ring; 44. Traction wire; 45. Wire hole a; 46. Wire hole b; 5. Electrode drive mechanism; 51. Pressure connector; 52. Opening; 53. Sliding button; 6. Luer connector; 7. Handle housing; 8. Cable connector. Detailed Implementation

[0047] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0048] The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0049] It is particularly important to note that, such as Figure 1 and 2 As shown in the following embodiments, from the accompanying drawings, the distal end disclosed in the specification refers to the end of the ablation catheter 1 used for ablation treatment, that is, the end close to the ablation stent electrode 2; the proximal end refers to the other end of the ablation catheter 1 away from the ablation stent electrode 2; the inner end refers to the end of the lead wire 3 close to the distal end of the ablation catheter 1; and the outer end refers to the end of the lead wire 3 extending out of the ablation catheter 1 and away from the proximal end of the ablation catheter 1.

[0050] like Figure 1-7 As shown, the ablation catheter assembly of this utility model is described in the attached document. Figure 1The device includes an ablation conduit 1, an ablation stent electrode 2, the ablation stent electrode 2 being disposed on the ablation conduit 1 and capable of moving radially along the ablation conduit 1 under external force; a wire 3, the inner end of which passes through the ablation conduit 1 and is electrically connected to the ablation stent electrode 2, and the outer end of which extends out of the ablation conduit 1 and is used to connect to an external power source; wherein, it also includes a disengagement mechanism 4, which is disposed on the ablation conduit 1, and the disengagement mechanism 4 tensions the wire 3 under external force until the wire 3 is disengaged from the ablation stent electrode 2. In this embodiment, the connection method between the ablation stent electrode 2 and the wire 3 is consistent with the prior art, that is, the connection is made by spot welding or bonding; the conductive parts of the ablation stent electrode 2 are arranged in pairs, and the wire 3 includes a positive wire 32 and a negative wire (not shown in the figure), and may also include a temperature sensing wire 31, the positive wire 32 and the negative wire being electrically connected to two adjacent conductive parts respectively. Even if the ablation stent electrode 2 can be adjusted in length according to the size of the treatment area, it can be one positive electrode and one negative electrode, or two positive electrodes and two negative electrodes, simply arranged in pairs. Under the action of external force, the ablation stent electrode 2 moves in the radial direction of the ablation catheter 1, and then the detachment mechanism 4 causes the positive electrode wire 32 and the negative electrode wire to detach from the solder joints or adhesive joints of the conductive part of the ablation stent electrode 2, so that the ablation stent electrode 2 can simultaneously achieve the technical effects of a stent and an ablation head, effectively realizing controllable positioning, controllable electric field and simplifying the doctor's operation steps. In this embodiment, the ablation catheter 1 uses a Pebax or PTEF tube.

[0051] In the above embodiments, preferably, see Appendix Figure 1 and 3 The ablation catheter 1 is provided with an electrode driving mechanism 5;

[0052] In the first working state, the electrode driving mechanism 5 is in close contact with the ablation stent electrode 2 and drives the ablation stent electrode 2 to move in the radial direction of the ablation catheter 1;

[0053] In the second working state, the electrode driving mechanism 5 disengages from the ablation stent electrode 2. In this embodiment, the electrode driving mechanism 5 is located between the ablation catheter 1 and the ablation stent electrode 2. The electrode driving mechanism 5 completes the radial disengagement of the ablation catheter 1 from the ablation stent electrode 2, and the disengagement mechanism 4 completes the disengagement of the ablation stent electrode 2 from the lead wire. The two processes complete the positioning, support, and ablation treatment of the ablation stent electrode 2 at the treatment site. The electrode driving mechanism 5 includes an inflatable balloon disposed on the ablation catheter 1. The inflatable balloon is connected to a pressurizing device disposed outside the ablation catheter 1. The inflatable balloon switches between a first working state and a second working state under the drive of the pressurizing device. The pressurizing device is a liquid pump or gas pump capable of delivering or drawing liquid or gas to the inflatable balloon. Therefore, the first working state of the electrode driving mechanism is that the inflatable balloon is in an inflated state after the pressurizing device delivers liquid or gas to it, and drives the ablation stent electrode that is closely attached to the inflatable balloon to undergo irreversible deformation and expand along its expansion direction, that is, the radial direction of the ablation catheter. The second working state of the electrode driving mechanism is that the inflatable balloon is in a contracted state after the pressurizing device draws liquid or gas into it. Due to the irreversible deformation of the ablation stent electrode, the inflatable balloon is in a contracted state and detaches from the ablation stent electrode.

[0054] In the above embodiments, preferably, see Appendix Figure 1 , 5 In embodiment 6, the disengagement mechanism 4 includes a sleeve 41 having a hollow chamber 42, the sleeve 41 being fitted onto the ablation catheter 1; a traction ring 43 disposed within the hollow chamber 42 and sliding on the inner wall of the sleeve 41; and a traction wire 44, the inner end of which is connected to the traction ring 43, and the outer end of which passes through a wire hole a45 on the inner wall of the sleeve 41 and extends out from the proximal end of the ablation catheter 1 and is connected to an external power unit. The disengagement mechanism 4 is located to the left of the ablation stent electrode 2. In this embodiment, the traction ring 43 is moved by the traction wire 44 to achieve disengagement between the wire 3 described in the above embodiment and the temperature-sensing wire 31 described in the following embodiment and the ablation stent electrode 2. In this embodiment, to facilitate the assembly of the wire, the sleeve 41 is provided with a wire passage hole b46. Specifically, the wire passage hole b46 is located on the outer wall of the sleeve, and the wire hole a54 is located closer to the proximal end of the ablation catheter 1 than the traction ring 43, which can ensure that the traction wire 44 can drive the traction ring 43 to move and continuously tension the wire 3 until the wire 3 is separated from the ablation support electrode 2. The outer end of the wire 3 passes through the wire passage hole b46 and the wire passage hole a45 located on the sleeve 41 in sequence and is led out from the proximal end of the ablation catheter 1.

[0055] In the above embodiments, preferably, see Appendix Figures 3 to 7 The ablation catheter 1 is provided with cavities a11, b12, c13, d14 and e15, and the wire 3 includes a temperature-sensitive wire 31, a positive wire 32 and a negative wire;

[0056] The cavity a11 is used to install a hydrophilic guidewire, and the ablation catheter 1 is provided with a Luer connector 6 connected to the cavity a11 for guiding the hydrophilic guidewire.

[0057] The temperature sensing wire 31 is provided in the cavity b12;

[0058] The positive electrode wire 32 is disposed in the cavity c13;

[0059] The cavity d14 is used to communicate with the inner cavity of the electrode driving mechanism 5 provided on the ablation catheter 1, and the ablation catheter 1 is provided with a pressure connector 51 that communicates with the cavity d14;

[0060] The negative electrode wire is disposed in the cavity e15. In this embodiment, the number of temperature sensing wires 31 is at least one, and can also be no more than the total number of wires 3. The arrangement of cavities a41, b42, c43, d44, and e45 allows for the orderly routing of functional lines for various functions. In a specific arrangement, cavity a11 is located at the center of the ablation catheter 1, and cavities b12, c13, d14, and e15 are evenly arranged circumferentially along the radial direction of the ablation catheter 1 in the cavity a11. The ablation catheter 1 has an opening 52 connecting the cavity d14 to the inner cavity of the electrode driving mechanism 5. In this embodiment, the Luer connector 6 is fixed integrally with the proximal end of the ablation catheter 1. The outer wall surface of the connector head of the Luer connector 6 is a conical surface, and the connector head of the Luer connector 6 is inserted into the cavity 11 at the proximal end of the ablation catheter 1.

[0061] To facilitate the routing of each functional line, in the above embodiments, preferably, see Appendix Figure 1 , 3Up to 7, the inner end of the temperature-sensing wire 31 is electrically connected to the ablation stent electrode 2, and the outer end of the temperature-sensing wire 31 passes through the assembly hole 16, the wire passage hole b46 and the wire passage hole a45 located on the ablation catheter 1 in sequence, and extends out from the proximal end of the cavity b12 and is connected to an external power source; the outer end of the positive electrode wire 32 passes through the assembly hole 16, the wire passage hole b46 and the wire passage hole a45 in sequence, and extends out from the proximal end of the cavity c13 and is connected to an external power source; the outer end of the negative electrode wire passes through the assembly hole 16, the wire passage hole b46 and the wire passage hole a45 in sequence, and extends out from the proximal end of the cavity e15 and is connected to an external power source. The outer end of the traction wire 44 passes through the wire hole a45 and then emerges from the proximal end of the cavity b12, and / or cavity c13, and / or cavity e15 on the ablation catheter 1, and connects to an external power unit. Specifically, the ablation catheter assembly also includes a handle housing 7, which is connected to the proximal end of the ablation catheter 1. The handle housing 7 is provided with an external power unit for applying external force to the traction ring 43 of the release mechanism 4. The external power unit is a sliding button 53, which is connected to the outer end of the traction wire 44. The ablation catheter assembly also includes a cable connector 8 connected to the end of the handle housing 7 away from the ablation catheter 1. The inner end of the cable connector 8 is inserted into the handle housing 7 as a whole and electrically connected to the temperature sensing wire 31, negative wire, and positive wire 32 extending from the ablation catheter 1. The outer end of the cable connector 8 is used to connect to an external power source. In this embodiment, the handle housing 7 adopts a conventional upper and lower snap-fit ​​structure, and the sliding button 53 is located on the top cover of the handle housing 7 for easy operation of the traction wire 44. The pressure connector 51 is designed to facilitate the connection of an external pressure device.

[0062] In the above embodiments, preferably, see Appendix Figure 1 The ablation stent electrode 2 includes at least two conductive stent segments 21 and at least one insulating stent segment 22. The insulating stent segment 22 is disposed between two adjacent conductive stent segments 21, and each conductive stent segment 21 is electrically connected to the wire 3. At least one conductive stent segment 21 made of conductive material is electrically connected to the inner end of the temperature-sensing wire 31. In this embodiment, the insulating stent segment 22 is made of insulating material, and the conductive stent segment 21 is made of conductive material. Two adjacent conductive stent segments 21 are electrically connected to the inner ends of the positive and negative electrode wires, respectively. The number of insulating stent segments 22 and conductive stent segments 21 can be increased or decreased according to the size of the treatment area; that is, it can be one positive electrode and one negative electrode, or two positive electrodes and two negative electrodes, simply arranged in pairs. Of course, the insulating stent segments 22 and conductive stent segments 21 can use other paired electrode structures.

[0063] In the above embodiments, all components are commercially available products. Adhesive layers are provided between the components as needed to improve the stability of their connections.

[0064] The operation process of the above technical solution is as follows: During use, the end of the duodenoscope is placed at the duodenal papilla. The ablation catheter 1 is inserted and pushed through the duodenoscope instrument channel. A 0.8mm hydrophilic guidewire is inserted into the Luer connector 304. This hydrophilic guidewire passes through the cavity 11 and is inserted into the papilla, entering the bile and pancreatic ducts. Using the guidewire as a slide rail, under CT imaging, the ablation stent electrode 2 is pushed to the tumor location. Liquid or gas is connected to the pressurization tube connector 51 through a pressurization device, and the expansion balloon of the electrode drive mechanism 5 is filled. The expansion balloon is fully expanded, driving the ablation stent electrode 2 to expand radially, forming a stent to support the tumor. This fixes the ablation stent electrode 2 within the bile and pancreatic ducts, achieving the purpose of fixing the ablation catheter 1 and thus fixing the paired electrodes on the ablation stent electrode 2. This ensures that the electrode site and the tumor location remain in a relatively stable position, forming a controllable ablation electric field to enhance the accuracy of treatment. After the discharge is completed, the disengagement mechanism 4 is activated, i.e., the sliding button 53 is pulled to drive the traction wire 44. The traction wire 44 pulls the traction ring 43 to the left, i.e., moves it to the distal end away from the ablation catheter 1. This causes the positive electrode wire 32, negative electrode wire, and temperature sensing wire 31 to separate from the solder joints on the conductive support section 21 of the ablation stent electrode 2. At the same time, the gas or liquid in the expansion balloon of the electrode driving mechanism 5 is extracted, causing the expansion balloon to shrink. Then, the ablation catheter 1 is extracted, permanently leaving the ablation stent electrode 2 in the bile duct. The entire process is controllable in positioning and electric field, and simplifies the operation steps.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An ablation catheter assembly, comprising: ablation catheter (1); Ablation stent electrode (2), which is disposed on the ablation catheter (1) and can move along the radial direction of the ablation catheter (1) under the action of external force; The inner end of the wire (3) passes through the ablation catheter (1) and is electrically connected to the ablation stent electrode (2). The outer end of the wire (3) extends out of the ablation catheter (1) and is used to connect to an external power source. Its features are: It also includes a disengagement mechanism (4), which is disposed on the ablation catheter (1). The disengagement mechanism (4) tensions the wire (3) under the action of external force until the wire (3) is disengaged from the ablation stent electrode (2).

2. The ablation catheter assembly according to claim 1, characterized in that: An electrode driving mechanism (5) is provided on the ablation catheter (1); In the first working state, the electrode driving mechanism (5) is in close contact with the ablation stent electrode (2) and drives the ablation stent electrode (2) to move in the radial direction of the ablation catheter (1); In the second working state, the electrode driving mechanism (5) is disengaged from the ablation stent electrode (2).

3. The ablation catheter assembly according to claim 2, characterized in that: The electrode driving mechanism (5) includes an inflatable balloon disposed on the ablation catheter (1), the inflatable balloon being connected to a pressurizing device disposed outside the ablation catheter (1), and the inflatable balloon switching between a first working state and a second working state under the drive of the pressurizing device.

4. The ablation catheter assembly according to claim 1, characterized in that: The disengagement mechanism (4) includes A sleeve (41) having a hollow chamber (42) is fitted onto the ablation catheter (1); A traction ring (43) is disposed in the hollow cavity (42) and slides on the inner wall of the sleeve (41); The traction wire (44) has its inner end connected to the traction ring (43) and its outer end passes through the wire hole a (45) on the inner wall of the sleeve (41) and extends out of the proximal end of the ablation catheter (1) and is connected to the external power unit.

5. An ablation catheter assembly according to claim 4, characterized in that: The sleeve (41) is provided with a wire hole b (46). The outer end of the wire (3) passes through the wire hole b (46) and wire hole a (45) located on the sleeve (41) in sequence and then comes out from the tail of the ablation catheter (1).

6. An ablation catheter assembly according to claim 5, characterized in that: The ablation catheter (1) is provided with cavities a (11), b (12), c (13), d (14) and e (15), and the wire (3) includes a temperature-sensitive wire (31), a positive wire (32) and a negative wire; The cavity a (11) is used to install a hydrophilic guidewire, and the ablation catheter (1) is provided with a Luer connector (6) connected to the cavity a (11) for guiding the hydrophilic guidewire. The temperature sensing wire (31) is provided in the cavity b (12); The positive electrode wire (32) is provided in the cavity c (13); The cavity d (14) is used to communicate with the inner cavity of the electrode driving mechanism (5) provided on the ablation catheter (1), and the ablation catheter (1) is provided with a pressure connector (51) communicating with the cavity d (14). The negative electrode wire is provided in the cavity e (15).

7. An ablation catheter assembly according to claim 6, characterized in that: The cavities b (12), c (13), d (14) and e (15) are evenly arranged in the circumference of the cavity a (11) along the radial direction of the ablation catheter (1). The ablation catheter (1) is provided with an opening (52) that connects the cavity d (14) and the expansion balloon of the electrode driving mechanism (5).

8. An ablation catheter assembly according to claim 6, characterized in that: The inner end of the temperature-sensing wire (31) is electrically connected to the ablation stent electrode (2), and the outer end of the temperature-sensing wire (31) passes through the assembly hole (16), the wire hole b (46) and the wire hole a (45) located on the ablation catheter (1) in sequence, and then extends out from the proximal end of the cavity b (12) and is connected to an external power source. The outer end of the positive electrode wire (32) passes through the assembly hole (16), wire hole b (46) and wire hole a (45) in sequence, and then extends out from the proximal end of the cavity c (13) and connects to the external power supply. The outer end of the negative electrode wire passes through the assembly hole (16), wire hole b (46) and wire hole a (45) in sequence, and then extends out from the proximal end of the cavity e (15) and connects to an external power source.

9. An ablation catheter assembly according to claim 6, characterized in that: The outer end of the traction wire (44) passes through the wire hole a (45) and is led out from the proximal end of the cavity b (12), and / or cavity c (13), and / or cavity e (15) on the ablation catheter (1) and is connected to an external power unit, which is a sliding button (53) for applying external force to the traction ring (43), which is disposed on the handle housing (7); The handle housing (7) is provided with a cable connector (8). The inner end of the cable connector (8) is inserted into the handle housing (7) as a whole and is electrically connected to the temperature sensing wire (31), negative wire and positive wire (32) extending from the ablation conduit (1). The outer end of the cable connector (8) is used to connect to an external power source.

10. An ablation catheter assembly according to claim 1, characterized in that: The ablation stent electrode (2) includes at least two conductive stent sections (21) and at least one insulating stent section (22). The insulating stent section (22) is disposed between two adjacent conductive stent sections (21), and each conductive stent section (21) is electrically connected to the wire (3).

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