Pulse ablation device

Abstract

The utility model provides a pulse ablation device, and relates to the technical field of medical treatment, the pulse ablation device comprises an ablation electrode assembly, an ablation catheter, a bending adjusting piece and an adjusting assembly; the ablation catheter is used for containing the ablation electrode assembly, the bending adjusting piece is arranged between the ablation catheter and the ablation electrode assembly, and the adjusting assembly is connected with the bending adjusting piece; the adjusting assembly can adjust the bending degree of the bending adjusting piece so as to adjust the bending degree of the ablation electrode assembly. The bending degree of the bending adjusting piece is adjusted and controlled through the adjusting assembly, the pulse ablation device can accurately control the angle and the bending degree of the ablation electrode assembly, it is ensured that the ablation electrode reaches the target position and is better attached to the focus area, and therefore the conduction efficiency of pulse energy is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a pulse ablation device. Background Technology

[0002] Irreversible electroporation (IRE) is a tissue ablation technique widely used to treat various natural cavity diseases such as thyroid diseases, urinary system diseases, esophageal diseases, intestinal diseases, COPD, lung cancer, liver cancer, and kidney cancer. However, existing pulse ablation devices for irreversible electroporation still have many limitations in actual clinical applications.

[0003] Existing pulse ablation devices generally rely on endoscopes for operation and positioning. However, since lesions are often located within complex anatomical structures, the positioning of pulse ablation devices in branch or deep lesions is often not precise enough, which increases the difficulty of the operation and the risk of failure. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of existing technologies by providing a pulse ablation device. This pulse ablation device improves ablation efficiency by setting a bending adjustment component to control the bending degree of the ablation electrode assembly.

[0005] This invention provides a pulse ablation device, which includes an ablation electrode assembly, an ablation catheter, a bending element, and an adjustment assembly;

[0006] The ablation catheter is used to accommodate the ablation electrode assembly, the bending adjustment member is disposed between the ablation catheter and the ablation electrode assembly, and the adjustment component is connected to the bending adjustment member;

[0007] The adjustment component can adjust the curvature of the bending member to adjust the curvature of the ablation electrode assembly.

[0008] In a possible implementation, the regulating assembly includes a regulating valve stem and a regulating valve body;

[0009] The regulating valve stem is connected to the regulating valve body, the regulating valve body is sleeved on the proximal end of the ablation catheter, and the regulating valve stem is connected to the bending member via a transmission connection.

[0010] In a possible implementation, the stiffness of the distal end of the ablation catheter is less than the stiffness of the proximal end of the ablation catheter.

[0011] In a possible implementation, the ablation catheter has a first axis, and the bending element has a second axis, the first axis and the second axis being parallel.

[0012] In a possible implementation, the bending member has a first outer diameter, and the ablation electrode assembly has a second outer diameter, wherein the first outer diameter is smaller than the second outer diameter.

[0013] In a possible implementation, the ablation electrode assembly includes an ablation sheath, a guide core, and a pulse cable;

[0014] The ablation catheter is provided with a first receiving position for accommodating the ablation sheath, the ablation sheath is used to accommodate the guide core and the pulse cable, and the guide core and the pulse cable are spaced apart.

[0015] In a possible implementation, the adjustment assembly includes an adjustment switch, a transmission mechanism, and a fine-tuning knob. The fine-tuning knob is connected to the adjustment switch via the transmission mechanism. The adjustment switch is used to switch the adjustment mode of the ablation electrode assembly.

[0016] In coarse adjustment mode, the ablation electrode assembly is capable of reciprocating within the ablation catheter along the axial direction of the ablation catheter;

[0017] In fine-tuning mode, the fine-tuning knob can drive the ablation electrode assembly to reciprocate along the axial direction of the ablation catheter via the transmission mechanism.

[0018] In a possible implementation, the ablation electrode assembly includes an information collection device and a flexible electrode;

[0019] The information collection device is connected to the flexible electrode, and the information collection device is used to acquire the position information and / or morphological data of the flexible electrode.

[0020] In a possible implementation, the pulse ablation device further includes a handle assembly;

[0021] The handle assembly is connected to the ablation electrode assembly, and the handle assembly can adjust the position of the ablation electrode assembly.

[0022] In a possible implementation, the preset outer diameter of the ablation catheter is 0.5mm-5mm.

[0023] The pulse ablation device provided in this application has the following beneficial effects:

[0024] This application provides a pulsed ablation device, relating to the field of medical technology. The pulsed ablation device includes an ablation electrode assembly, an ablation catheter, a bending adjustment component, and an adjustment assembly. The ablation catheter houses the ablation electrode assembly, the bending adjustment component is disposed between the ablation catheter and the ablation electrode assembly, and the adjustment assembly is connected to the bending adjustment component. The adjustment assembly can adjust the curvature of the bending adjustment component to adjust the curvature of the ablation electrode assembly. By adjusting the curvature of the bending adjustment component through the adjustment assembly, the pulsed ablation device can precisely control the angle and curvature of the ablation electrode assembly, ensuring that the ablation electrode reaches the target position and fits more closely to the lesion area, thereby improving the transmission efficiency of pulse energy. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the pulse ablation device according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the ablation electrode assembly according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the ablation electrode assembly according to an embodiment of this application;

[0029] Figure 4 This is a cross-sectional view of the ablation catheter according to an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of the adjustment component according to an embodiment of this application.

[0031] The following is supplementary explanation of the attached figures:

[0032] 1. Ablation electrode assembly; 11. Flexible electrode; 12. Guide core; 13. Pulse cable; 14. Fixing component; 15. Information collection device; 16. Ablation sheath; 2. Ablation catheter; 3. Bending component; 4. Adjustment assembly; 41. Adjustment valve body; 42. Adjustment valve stem; 5. Connector assembly; 6. Handle assembly. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0034] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0035] Understandably, irreversible electroporation (IRE) is a novel tissue ablation technique. In this method, doctors guide a treatment device to the lesion site through skin puncture or intervention via natural cavities, and then treat the lesion with the ablation device. IRE is applicable to various natural cavity diseases, such as thyroid diseases, urinary system diseases, esophageal diseases, intestinal diseases, COPD, lung cancer, liver cancer, kidney cancer, etc. When biological tissue is placed in a high-intensity electric field, the permeability of the cell membrane increases significantly, causing extracellular fluid molecules to diffuse into the cell membrane and induce cell death, thereby achieving tissue ablation. During the ablation process, the lipid bilayer in the cell membrane breaks down under the high-intensity electric field, and the lipid bilayer changes with the electric field strength, treatment time, pulse period, and number of pulses. The ablation technique has evolved from early reversible electroporation to irreversible electroporation, and in recent years, irreversible electroporation has been applied to minimally invasive ablation of various tissues or tumors.

[0036] Compared to traditional tissue ablation techniques, such as radiofrequency ablation (RFA) and microwave ablation (MWA), IRE tissue ablation technology has many significant advantages. For example, IRE inactivates tissue at the cellular level, without affecting tissue structure or protein activity, and allows for precise control of the inactivation area. Furthermore, IRE generates very little heat during ablation, eliminating heat deposition and minimizing impact on local blood vessels. The short ablation time during IRE reduces tissue exposure time and the likelihood of infection complications. In addition, irreversible electroporation ablation can utilize medical imaging techniques such as computed tomography (CT), ultrasound, magnetic resonance imaging (MRI), and MRI to pinpoint the ablation area, monitor treatment in real time, and observe postoperative efficacy, making the IRE ablation range more precise and maximizing the protection of normal tissue.

[0037] In existing technologies, for tumor-related diseases, such as lung tumors, it is difficult to locate the target lesion tissue during surgery. Endoscopic manipulation and localization are required, which is challenging, and some branches cannot be accurately located.

[0038] In view of this, in order to solve at least one of the above problems, this application provides a pulse ablation device, which is particularly suitable for irreversible electroporation ablation technology.

[0039] The following description, in conjunction with the accompanying drawings, describes a pulse ablation device provided in an embodiment of this application. The pulse ablation device includes an ablation electrode assembly 1, an ablation catheter 2, a bending adjustment member 3, and an adjustment component 4. The ablation catheter 2 accommodates the ablation electrode assembly 1. The bending adjustment member 3 is disposed between the ablation catheter 2 and the ablation electrode assembly 1. The adjustment component 4 is connected to the bending adjustment member 3. The adjustment component 4 can adjust the curvature of the bending adjustment member 3 to adjust the curvature of the ablation electrode assembly 1. By adjusting the curvature of the bending adjustment member 3 through the adjustment component 4, the pulse ablation device can precisely control the angle and curvature of the ablation electrode assembly 1, ensuring that the ablation electrode reaches the target position and fits more closely to the lesion area, thereby improving the transmission efficiency of pulse energy.

[0040] Specifically, the adjustment component 4 acts directly on the bending element 3. The distal end of the bending element 3 is connected to the distal end of the ablation catheter 2, and the proximal end of the bending element 3 is connected to the adjustment component 4. The ablation electrode assembly 1 is used to transmit pulse energy to the target lesion tissue to achieve lesion ablation. The ablation electrode includes a flexible electrode 11, a guide core 12, and a pulse cable 13. The distal end of the flexible electrode 11 is pointed, spindle-shaped, or arc-shaped to ensure close contact with the target lesion tissue. The operator manually operates the adjustment component 4 to adjust the curvature of the bending element 3 to adjust the curvature of the ablation catheter 2. The ablation catheter 2 can drive the ablation electrode assembly 1 to bend, thereby adjusting the curvature of the ablation electrode assembly 1.

[0041] In the embodiments of this specification, the bending element 3 is a bending wire, and the material of the bending wire is stainless steel, carbon steel, aluminum alloy, plastic or composite material.

[0042] Furthermore, the adjustment assembly 4 includes an adjustment valve stem 42 and an adjustment valve body 41; the adjustment valve stem 42 is connected to the adjustment valve body 41, the adjustment valve body 41 is sleeved on the proximal end of the ablation catheter 2, and the adjustment valve stem 42 is drive-connected to the bending element 3. In this way, the operator can achieve precise control of the bending element 3 through the adjustment valve stem 42, thereby achieving flexible adjustment of the direction and angle of the ablation catheter 2. The adjustment assembly 4 can adapt to various surgical scenarios, providing support for different bending angle requirements of the ablation catheter 2, thus improving the applicability and versatility of the device in surgical operations.

[0043] Specifically, the regulating valve body 41 is connected to the proximal end of the ablation catheter 2, and the regulating valve stem 42 is connected to the bending member 3 via a transmission connection. The operator can adjust the bending of the bending member 3 by rotating or pushing and pulling the regulating valve stem 42.

[0044] In this embodiment of the specification, the regulating valve body 41 is disposed between the ablation electrode assembly 1 and the connector assembly 5, and the connector assembly 5 includes a pulse connector and a sensing connector.

[0045] Specifically, the stiffness of the distal end of the ablation catheter 2 is less than that of the proximal end. This results in greater flexibility at the distal end of the ablation catheter 2, allowing it to adapt to the curvature of the lungs or other complex anatomical regions. This helps the ablation electrode assembly 1 to better conform to the surface of the target lesion tissue, ensuring that ablation energy is released evenly and precisely, thus improving treatment efficacy.

[0046] Specifically, the ablation catheter 2 and the ablation electrode assembly 1 can be delivered via bronchoscopy for the treatment of natural cavity diseases. The ablation catheter 2 is a multi-lumen structure composed of metal and polymer, and the stiffness of the ablation catheter 2 gradually decreases from the proximal end to the distal end.

[0047] Preferably, the metal material in the ablation catheter 2 is medical stainless steel or nickel-titanium alloy, etc.; the polymer material is polyetheramide, nylon, thermoplastic polyurethane, polyimide or polytetrafluoroethylene, etc.

[0048] Specifically, the ablation catheter 2 has a first axis, and the bending element 3 has a second axis, with the first and second axes parallel. This ensures that during bending, the force transmission direction of the bending element 3 and the ablation catheter 2 is consistent with the direction of movement, reducing force loss due to axis misalignment and thus improving the efficiency of adjustment and operation.

[0049] Specifically, in the embodiments of this specification, the diameter of the ablation catheter 2 is consistent from the distal end to the proximal end, the diameter of the bending member 3 is consistent from the distal end to the proximal end, the first axis is the center line of the ablation catheter 2, the second axis is the center line of the bending member 3, and the directions of the first axis and the second axis are parallel or consistent.

[0050] Specifically, the bending element 3 has a first outer diameter, and the ablation electrode assembly 1 has a second outer diameter, with the first outer diameter being smaller than the second outer diameter. Thus, the bending element 3 provides greater flexibility and maneuverability when the ablation catheter 2 passes through narrow anatomical areas, making it easier to access the target site. The smaller outer diameter of the bending element 3 facilitates precise adjustment of the angle of the ablation catheter 2, ensuring that the ablation electrode assembly 1 can be accurately positioned in the target area, thereby improving the accuracy of the procedure.

[0051] Specifically, the ablation catheter 2 includes a first inner lumen and a second inner lumen. The first inner lumen is used to accommodate the bending member 3, and the second inner lumen is used to accommodate the ablation electrode assembly 1. The first and second inner lumens are connected through the ablation catheter 2, and the cross-sections of the first and second inner lumens are circular.

[0052] Specifically, the ablation electrode assembly 1 includes an ablation sheath 16, a guide core 12, and a pulse cable 13. The ablation conduit 2 is provided with a first receiving position for accommodating the ablation sheath 16. The ablation sheath 16 is used to accommodate the guide core 12 and the pulse cable 13, with a gap between the guide core 12 and the pulse cable 13. This gap arrangement between the pulse cable 13 and the guide core 12 avoids signal or energy interference that might occur from direct contact between the cable and the core, thereby improving the efficiency of power transmission, ensuring the stability and reliability of the ablation effect, improving the independent movement performance of the guide core 12, and enhancing operational flexibility and response accuracy.

[0053] Specifically, in the embodiments of this specification, the second inner cavity is a first receiving position, which is used to receive the ablation sheath 16. The ablation sheath 16 is provided with a first preset receiving position and a second preset receiving position. The first preset receiving position is used to receive the guide inner core 12, and the second preset receiving position is used to receive the pulse cable 13. The first preset receiving position and the second preset receiving position are spaced apart, thereby creating a gap between the guide inner core 12 and the pulse cable 13.

[0054] Specifically, the adjustment component 4 includes an adjustment switch, a transmission mechanism, and a fine-tuning knob. The fine-tuning knob is connected to the adjustment switch through the transmission mechanism. The adjustment switch is used to switch the adjustment mode of the ablation electrode component 1.

[0055] In coarse adjustment mode, the ablation electrode assembly 1 can reciprocate along the axis of the ablation catheter 2 within the ablation catheter 2; in fine adjustment mode, the fine adjustment knob, through a transmission mechanism, can drive the ablation electrode assembly 1 to reciprocate along the axis of the ablation catheter 2. Thus, the ablation electrode assembly 1 can move rapidly and significantly along the axis of the ablation catheter 2, and also achieve precise axial movement through the transmission mechanism of the fine adjustment knob. This allows operators to flexibly respond to the operational needs at different stages without changing instruments or performing complex procedures, significantly improving surgical efficiency.

[0056] Specifically, for the ablation electrode assembly 1, in coarse adjustment mode, the operator manually adjusts the position of the electrode assembly; in fine adjustment mode, the operator first turns on the fine adjustment switch, and then rotates the fine adjustment knob. The fine adjustment knob and the transmission mechanism are driven by a threaded structure. Through the meshing of the threads, the rotational power is transmitted to the electrode assembly to make it produce linear motion.

[0057] Specifically, the ablation electrode assembly 1 includes an information collection device 15 and a flexible electrode 11. The information collection device 15 is connected to the flexible electrode 11 and is used to acquire the position information and / or morphological data of the flexible electrode 11. The information collection device 15 can monitor the position of the flexible electrode 11 in real time, ensuring accurate positioning of the lesion during the operation, reducing the risk of misoperation, and can also accurately understand the morphology and position of the flexible electrode 11, ensuring that the electrode adheres closely to the target tissue, improving the uniformity of energy transfer and ablation efficiency.

[0058] Specifically, the information collection device 15 is mounted on the fixing member 14, and the distal end of the flexible electrode 11 is fixedly connected to the fixing member 14. The ablation electrode assembly 1 includes a navigation line and a sensing connector. The navigation line is electrically connected to the information collection device 15, and the sensing connector is communicatively connected to the pulse ablation system. In this embodiment, the fixing member 14 is a fixing sleeve.

[0059] Specifically, the pulse ablation device can determine the relative position of the flexible electrode 11 with the target lesion tissue and patient structure in real time, avoid deviation in the delivery of the flexible electrode 11, improve positioning accuracy, reduce the frequency of confirmation by intraoperative computed tomography (CT), eliminate the need for repeated adjustments, reduce the possibility of serious complications, and improve safety.

[0060] In one embodiment, the information collection device 15 is a positioning sensor that can be combined with an electromagnetic positioning three-dimensional navigation system; in another embodiment, the information collection device 15 is a shape-sensing optical fiber that can monitor the shape data of the flexible electrode 11 in real time.

[0061] Specifically, when the information collection device 15 is a positioning sensor, the positioning sensor is connected to the electromagnetic positioning three-dimensional navigation system. The electromagnetic positioning three-dimensional navigation system can track the position of the flexible electrode 11 in real time and display the coordinates of the flexible electrode 11 in three-dimensional space. Then, the operator adjusts the direction of the flexible electrode 11 according to the position displayed in real time by the electromagnetic positioning three-dimensional navigation system to ensure that the flexible electrode 11 can correctly contact the target lesion tissue.

[0062] Furthermore, the pulse ablation device also includes a handle assembly 6; the handle assembly 6 is connected to the ablation electrode assembly 1, and the handle assembly 6 can adjust the position of the ablation electrode assembly 1. In this way, the handle assembly 6 can directly control the position of the ablation electrode assembly 1, and the operator can quickly and flexibly adjust the position of the electrode to adapt to changes in the lesion location or the complexity of the tissue environment during the operation.

[0063] Specifically, the handle assembly 6 is provided with a control component, which is slidably or rotatably connected to the handle assembly 6. The operator can adjust the position of the ablation electrode assembly 1 by pushing or rotating the control component.

[0064] Specifically, the pre-set outer diameter of ablation catheter 2 is 0.5mm-5mm. Thus, ablation catheter 2 is suitable for various surgical scenarios and target tissues, reducing tissue compression and damage, minimizing tissue injury during puncture or insertion, resulting in faster postoperative recovery, and reducing pain and complications.

[0065] Specifically, the number of ablation electrode assemblies 1 is greater than or equal to one set, and the outer diameter of the ablation catheter 2 can increase with the number of ablation electrode assemblies 1. For example, when the ablation catheter 2 contains two sets of ablation electrode assemblies 1, the inner and outer diameters of the ablation catheter 2 are greater than when the ablation catheter 2 contains only one set of ablation electrode assemblies 1.

[0066] The working process of the above-mentioned pulse ablation device is described below in specific application scenarios:

[0067] First, the ablation electrode assembly 1 is housed in the ablation catheter 2. The operator determines the location of the lesion through image navigation and inserts the pulse ablation device into the anatomical channel close to the lesion.

[0068] Then, by operating the regulating valve stem 42, the operator adjusts the curvature of the bending member 3, thereby changing the curvature of the ablation electrode assembly 1 so that it is aligned with the target lesion tissue. The ablation electrode assembly 1 transmits pulse energy to the target lesion tissue through the guide core 12 and the pulse cable 13, and the pulse energy is evenly transmitted to the lesion area.

[0069] Finally, after the target lesion tissue is ablated, the pulse ablation device returns to its initial shape, and the bending component 3 returns to a straight line or other shape that facilitates withdrawal.

[0070] The following describes specific embodiments of this application based on the above technical solution.

[0071] Example 1

[0072] The following is in conjunction with the appendix Figure 1-5 This embodiment introduces a pulse ablation device, which includes an ablation electrode assembly 1, an ablation conduit 2, a bending member 3, and an adjustment component 4. The ablation conduit 2 is used to accommodate the ablation electrode assembly 1, the bending member 3 is disposed between the ablation conduit 2 and the ablation electrode assembly 1, and the adjustment component 4 is connected to the bending member 3. The adjustment component 4 can adjust the bending degree of the bending member 3 to adjust the bending degree of the ablation electrode assembly 1.

[0073] The ablation electrode assembly 1 includes an information collection device 15 and a flexible electrode 11. The information collection device 15 is connected to the flexible electrode 11 and is used to acquire the position information and / or morphological data of the flexible electrode 11. The information collection device 15 is mounted on the fixing member 14 and is a positioning sensor that can be combined with an electromagnetic positioning three-dimensional navigation system.

[0074] The adjustment component 4 acts directly on the bending element 3. The distal end of the bending element 3 is connected to the distal end of the ablation catheter 2, and the proximal end of the bending element 3 is connected to the adjustment component 4. The ablation electrode assembly 1 is used to transmit pulse energy to the target lesion tissue to achieve lesion ablation. The ablation electrode includes a flexible electrode 11, a guide core 12, and a pulse cable 13. The distal end of the flexible electrode 11 is pointed, spindle-shaped, or arc-shaped to ensure close contact with the target lesion tissue. The bending element 3 is a bending wire made of stainless steel, carbon steel, aluminum alloy, plastic, or composite material.

[0075] The adjustment assembly 4 includes an adjustment valve stem 42 and an adjustment valve body 41. The adjustment valve stem 42 is connected to the adjustment valve body 41, which is sleeved on the proximal end of the ablation catheter 2. The adjustment valve stem 42 is drivenly connected to the bending member 3. The adjustment valve body 41 is located between the ablation electrode assembly 1 and the connector assembly 5, which includes a pulse connector and a sensing connector.

[0076] The stiffness of the distal end of the ablation catheter 2 is less than that of the proximal end. The ablation catheter 2 has a first axis, and the bending element 3 has a second axis; the first and second axes are parallel. The bending element 3 has a first outer diameter, and the ablation electrode assembly 1 has a second outer diameter; the first outer diameter is smaller than the second outer diameter. The ablation electrode assembly 1 includes an ablation sheath 16, a guide core 12, and a pulse cable 13. The outer diameter of the ablation catheter 2 is 0.5 mm to 5 mm.

[0077] The pulse ablation device also includes a handle assembly 6, which is connected to the ablation electrode assembly 1 and can adjust the position of the ablation electrode assembly 1.

[0078] Example 2

[0079] In Example 2, the adjustment component 4 includes an adjustment switch, a transmission mechanism, and a fine-tuning knob. The fine-tuning knob is connected to the adjustment switch through the transmission mechanism. The adjustment switch is used to switch the adjustment mode of the ablation electrode component 1. In the coarse adjustment mode, the ablation electrode component 1 can reciprocate along the axial direction of the ablation catheter 2 within the ablation catheter 2. In the fine adjustment mode, the fine-tuning knob can drive the ablation electrode component 1 to reciprocate along the axial direction of the ablation catheter 2 through the transmission mechanism.

[0080] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pulse ablation device, characterized in that, The pulse ablation device includes an ablation electrode assembly (1), an ablation catheter (2), a bending element (3), and an adjustment assembly (4); The ablation catheter (2) is used to accommodate the ablation electrode assembly (1), the bending member (3) is disposed between the ablation catheter (2) and the ablation electrode assembly (1), and the adjustment component (4) is connected to the bending member (3); The adjustment component (4) can adjust the curvature of the bending member (3) to adjust the curvature of the ablation electrode assembly (1).

2. The pulse ablation device according to claim 1, characterized in that, The regulating assembly (4) includes a regulating valve stem (42) and a regulating valve body (41); The regulating valve stem (42) is connected to the regulating valve body (41), the regulating valve body (41) is sleeved on the proximal end of the ablation catheter (2), and the regulating valve stem (42) is connected to the bending member (3) in a transmission connection.

3. The pulse ablation device according to claim 1, characterized in that, The stiffness of the distal end of the ablation catheter (2) is less than the stiffness of the proximal end of the ablation catheter (2).

4. The pulse ablation device according to any one of claims 1-3, characterized in that, The ablation catheter (2) has a first axis, and the bending member (3) has a second axis, the first axis and the second axis being parallel.

5. The pulse ablation device according to any one of claims 1-3, characterized in that, The bending member (3) has a first outer diameter, and the ablation electrode assembly (1) has a second outer diameter, wherein the first outer diameter is smaller than the second outer diameter.

6. The pulse ablation device according to any one of claims 1-3, characterized in that, The ablation electrode assembly (1) includes an ablation sheath (16), a guide core (12), and a pulse cable (13); The ablation catheter (2) is provided with a first receiving position for accommodating the ablation sheath (16), the ablation sheath (16) is used to accommodate the guide core (12) and the pulse cable (13), and the guide core (12) and the pulse cable (13) are spaced apart.

7. The pulse ablation device according to any one of claims 1-3, characterized in that, The adjustment component (4) includes an adjustment switch, a transmission mechanism and a fine-tuning knob. The fine-tuning knob is connected to the adjustment switch through the transmission mechanism. The adjustment switch is used to switch the adjustment mode of the ablation electrode component (1). In coarse adjustment mode, the ablation electrode assembly (1) is capable of reciprocating along the axial direction of the ablation catheter (2) within the ablation catheter (2); In fine-tuning mode, the fine-tuning knob can drive the ablation electrode assembly (1) to reciprocate along the axial direction of the ablation conduit (2) through the transmission mechanism.

8. The pulse ablation device according to any one of claims 1-3, characterized in that, The ablation electrode assembly (1) includes an information collection device (15) and a flexible electrode (11); The information collection device (15) is connected to the flexible electrode (11), and the information collection device (15) is used to acquire the position information of the flexible electrode (11) and / or the morphological data of the flexible electrode (11).

9. The pulse ablation device according to any one of claims 1-3, characterized in that, The pulse ablation device also includes a handle assembly (6); The handle assembly (6) is connected to the ablation electrode assembly (1), and the handle assembly (6) can adjust the position of the ablation electrode assembly (1).

10. The pulse ablation device according to any one of claims 1-3, characterized in that, The pre-set outer diameter of the ablation catheter (2) is 0.5mm-5mm.

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