Ablation device and ablation apparatus

Abstract

Embodiments of the present disclosure provide an ablation device and an ablation apparatus, the ablation device comprising a tube assembly, a pull rod and a basket electrode, the tube assembly comprising a first tube body and a second tube body, the first tube body being sleeved in the second tube body, the first tube body and the second tube body being relatively movable along the axial direction of the first tube body; the pull rod comprising a first sub-pull rod in the first tube body and a second sub-pull rod extending out of the first tube body; the basket electrode comprising opposite first and second ends, the first end being connected with the end of the second sub-pull rod away from the first tube body, and the second end being connected with the end of the first tube body close to the second sub-pull rod; when the first end of the basket electrode is located outside the second tube body by relatively moving the first tube body and the second tube body, the part of the basket electrode outside the second tube body is configured to be deformed under the action of the pull rod; by controlling the relative movement of the first tube body and the second tube body and the movement of the pull rod, the basket electrode can be adapted to cavities with different inner diameters and shapes.

Description

Technical Field

[0001] Embodiments of this disclosure relate to an ablation device and an ablation apparatus. Background Technology

[0002] Ablation of lesions within natural cavities can be achieved using an ablation device. This device can be directly introduced into the location of the lesion through the natural cavity, or introduced into the lesion through an endoscope, such as a bronchoscope, colonoscope, gastroscope, or esophagoscope. Alternatively, it can be introduced under three-dimensional virtual navigation, real-time electromagnetic navigation, or with the assistance of a surgical robot.

[0003] For example, clinically, ablation can be divided into two categories: cardiac interventional ablation and abdominal solid organ ablation. Cardiac interventional ablation is typically used to treat diseases such as arrhythmias. It utilizes ablation devices to alter tissue, aiming to destroy potential arrhythmic tissue and create transmural and continuous permanent lesions. Abdominal organ ablation can treat various tumors, including those in the liver, stomach, pancreas, colorectal region, and abdominal cavity. Cardiac ablation is often used for malignant or refractory arrhythmias. Abdominal ablation is often used for benign or malignant tumors in solid organs such as the liver and uterus. Ablation reaches deep into the lesion, allowing for localized and precise ablation without damaging surrounding organs, minimizing impact on other tissues, resulting in minimal surgical trauma and rapid patient recovery. Summary of the Invention

[0004] Embodiments of this disclosure provide an ablation device and an ablation apparatus. When the first and second tubes of the ablation device are moved relative to each other until at least a first end of the basket electrode is outside the second tube, the portion of the basket electrode outside the second tube is configured to deform under the action of a pull rod. This allows the relative position of the first and second tubes to be adjusted according to the inner diameter of the cavity in which the ablation device is located, thereby adjusting the size of the portion of the basket electrode outside the second tube. Simultaneously, by moving the pull rod, the portion of the basket electrode outside the second tube is deformed, allowing the radial dimension of the basket electrode to be adjusted according to the inner diameter of the cavity in which the ablation device is located. Consequently, the basket electrode of this ablation device can fit into cavities with different inner diameters to accommodate cavities with a wider range of inner diameters.

[0005] At least one embodiment of this disclosure provides an ablation device, comprising: a tube assembly including a first tube body and a second tube body, the first tube body being sleeved within the second tube body, and the first tube body and the second tube body being movable relative to each other along the axial direction of the first tube body; a pull rod including a first sub-pull rod within the first tube body and a second sub-pull rod extending beyond the first tube body, the extension direction of the pull rod being parallel to the axial direction of the first tube body; and a basket electrode including a first end and a second end opposite to each other along the extension direction of the second sub-pull rod, the first end being connected to the end of the second sub-pull rod away from the first tube body, and the second end being connected to the end of the first tube body near the second sub-pull rod; when the first tube body and the second tube body are moved relative to each other until at least the first end of the basket electrode is outside the second tube body, under the action of the pull rod, the portion of the basket electrode outside the second tube body is configured to be deformable.

[0006] For example, in an ablation device provided in an embodiment of this disclosure, when the end of the second sub-rod away from the first tube body is spaced apart from the end of the first tube body near the second sub-rod along the axial direction of the first tube body, and when both the first end and the second end of the basket electrode are located in the second tube body, the basket electrode presents a first initial state.

[0007] For example, in an ablation device provided in an embodiment of this disclosure, when the second tube moves relative to the first tube until at least the first end of the basket electrode is outside the second tube, the basket electrode presents a first predetermined state, and in the first predetermined state, the maximum radial dimension of the portion of the basket electrode outside the second tube in a plane perpendicular to the extension direction of the pull rod is greater than the maximum radial dimension of the basket electrode in a plane perpendicular to the extension direction of the pull rod in the first initial state.

[0008] For example, in an ablation device provided in an embodiment of this disclosure, under the action of the pull rod, the basket electrode presents a second predetermined state, and in the second predetermined state, the maximum radial dimension of the portion of the basket electrode located outside the second tube in a plane perpendicular to the extension direction of the pull rod is greater than the maximum radial dimension of the portion of the basket electrode located outside the second tube in a plane perpendicular to the extension direction of the pull rod in the first predetermined state.

[0009] For example, in an ablation device provided in an embodiment of this disclosure, when the second tube moves relative to the first tube until both the first end and the second end of the basket electrode are outside the second tube, the shape of the basket electrode in the first predetermined state includes at least one of a cylinder, a frustum, a sphere, an elliptical sphere, a gourd-shaped sphere, and a cone with stepped sides.

[0010] For example, in an ablation device provided in one embodiment of this disclosure, the basket electrode includes a plurality of electrode sheets, the first ends of the plurality of electrode sheets are connected to form the first end of the basket electrode, the second ends of the plurality of electrode sheets are connected to form the second end of the basket electrode, the number of the plurality of electrode sheets is greater than or equal to 6, and the thickness of each electrode sheet is 0.1 mm to 2 mm.

[0011] For example, in an ablation device provided in one embodiment of this disclosure, the plurality of electrode sheets include a plurality of first electrode sheets having a first hardness and a plurality of second electrode sheets having a second hardness, wherein the first hardness is less than the second hardness, and the number of first electrode sheets is less than the number of second electrode sheets.

[0012] For example, in an ablation device provided in one embodiment of this disclosure, a plurality of first electrode plates are arranged adjacent to each other in sequence, and a plurality of second electrode plates are arranged adjacent to each other in sequence.

[0013] For example, an ablation device provided in one embodiment of this disclosure further includes an electrode structure disposed on the side of the basket electrode away from the first tube body, wherein the electrode structure is connected to the first end of the basket electrode.

[0014] For example, in an ablation device provided in one embodiment of this disclosure, the electrode structure is configured to: present a second initial state when it is completely located in the second tube; and present a third predetermined state when the second tube moves relative to the first tube to the point where the electrode structure is completely located outside the second tube, wherein in the third predetermined state, the maximum radial dimension of the electrode structure in a plane perpendicular to its axial direction is greater than the maximum radial dimension of the electrode structure in a plane perpendicular to its axial direction in the second initial state.

[0015] For example, in an ablation device provided in an embodiment of this disclosure, when the electrode structure is in the third predetermined state, the maximum radial dimension of the electrode structure in a plane perpendicular to its axis is less than or equal to the maximum radial dimension of the basket electrode in a plane perpendicular to its axis when the basket electrode is in the first predetermined state.

[0016] For example, in an ablation device provided in one embodiment of this disclosure, the electrode structure, in the third predetermined state, has a maximum radial dimension in a plane perpendicular to its axis ranging from 2 mm to 10 mm.

[0017] For example, in an ablation device provided in one embodiment of this disclosure, the shape of the electrode structure in the third predetermined state includes at least a portion of at least one of a cylinder, a frustum, a sphere, an elliptical sphere, a gourd-shaped sphere, and a cone with stepped sides.

[0018] For example, in an ablation device provided in one embodiment of this disclosure, the electrode structure is a semi-basket electrode structure.

[0019] For example, in an ablation apparatus provided in one embodiment of this disclosure, the electrode structure is connected to the first end of the basket electrode via a connecting structure, the connecting structure being configured such that the electrode structure can be deflected.

[0020] At least one embodiment of this disclosure provides an ablation device, the ablation device comprising: any of the ablation devices described above; and a control handle, including a first control switch and a second control switch, wherein the control handle is disposed on the side of the first sub-pull rod away from the basket electrode, the first control switch is connected to the end of the first sub-pull rod away from the basket electrode and is configured to control the pull rod to move relative to the first tube body along its extension direction, and the second control switch is connected to the end of the second tube body away from the basket electrode and is configured to control the second tube body to move relative to the first tube body along its axial direction.

[0021] For example, in an ablation device provided in one embodiment of this disclosure, the first sub-rod includes a first sub-rod first portion and a second sub-rod first portion detachably connected, wherein along the extension direction of the rod, the first sub-rod first portion is closer to the basket electrode than the second sub-rod first portion.

[0022] For example, in an embodiment of the ablation device provided in this disclosure, the first sub-rod first part is threadedly connected to the second sub-rod second part.

[0023] For example, in an ablation device provided in an embodiment of this disclosure, along the direction from the basket electrode to the control handle, the first tube body includes a first tube body first sub-section, a first tube body second sub-section, and a first tube body third sub-section connected in sequence. The hardness of the first tube body first sub-section is less than the hardness of the first tube body second sub-section, and the hardness of the first tube body second sub-section is less than the hardness of the first tube body third sub-section.

[0024] For example, in an embodiment of the ablation device provided in this disclosure, the first sub-part of the first tube has a dimension of 20 mm to 100 mm in the extension direction of the pull rod, and at least one of the first sub-part and the second sub-part of the first tube is made of polyether block polyamide, and the third sub-part of the first tube is made of at least one of polyether block polyamide and polydodecanoic acid. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0026] Figure 1 This is a schematic diagram of the structure of an ablation device provided in at least one embodiment of the present disclosure;

[0027] Figure 2 for Figure 1 The diagram shows the structure of the ablation device when part of the basket electrode is exposed from the second tube and under the action of the pull rod;

[0028] Figure 3 for Figure 1 The diagram shows the structure of the ablation device when part of the basket electrode extends from inside the second tube to outside the second tube.

[0029] Figure 4 for Figure 1 The diagram shows the structure of the ablation device when the entire basket electrode is located outside the second tube.

[0030] Figure 5A A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is entirely located outside the second tube;

[0031] Figure 5B A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is located outside the second tube;

[0032] Figure 5C A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is located outside the second tube;

[0033] Figure 5D A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is located outside the second tube;

[0034] Figure 5E A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is located outside the second tube;

[0035] Figure 5F A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is located outside the second tube;

[0036] Figure 5G A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is located outside the second tube;

[0037] Figure 6 This is a schematic diagram of an ablation device provided in one embodiment of the present disclosure;

[0038] Figure 7 for Figure 6 The diagram shows the structure of the ablation device when part of the basket electrode is exposed from the second tube and under the action of the pull rod;

[0039] Figure 8 for Figure 6 The diagram shows the structure of the ablation device when the basket electrode is completely exposed from the second tube.

[0040] Figure 9A This is a schematic diagram showing the state of the ablation device provided in an embodiment of the present disclosure within a small cavity of a bifurcated cavity;

[0041] Figure 9B A schematic diagram showing the state of the ablation device provided in an embodiment of this disclosure within the large cavity of a bifurcated cavity;

[0042] Figure 10 A schematic diagram of the structure of another ablation device provided in an embodiment of this disclosure;

[0043] Figure 11 for Figure 10 The diagram shows the ablation device with the basket electrode and electrode structure fully exposed from the body of the second tube to the outside of the second tube.

[0044] Figure 12 A schematic diagram of a third predetermined state of another electrode structure provided in an embodiment of this disclosure;

[0045] Figure 13 A schematic diagram of a third predetermined state of another electrode structure provided in an embodiment of this disclosure;

[0046] Figure 14 A schematic diagram showing the state of the ablation device provided in an embodiment of this disclosure within a bifurcation cavity;

[0047] Figure 15 This is a schematic diagram of the structure of an ablation device provided in one embodiment of the present disclosure;

[0048] Figure 16AA schematic diagram of the structure of the basket electrode and pull rod in another ablation device provided in an embodiment of this disclosure; and

[0049] Figure 16B for Figure 16A An exploded view of the tie rod of the ablation device. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0051] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0052] Unless otherwise defined, the characteristics such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include strictly defined cases of "parallel," "perpendicular," and "identical," as well as cases involving a certain margin of error, such as "approximately parallel," "approximately perpendicular," and "approximately identical." For example, the aforementioned "approximately" may indicate that the difference between the compared objects is within 10% or 5% of the average value of the compared objects. Unless otherwise specified in the following embodiments of this disclosure, the quantity of a component or element is implied to mean that the component or element may be one or more, or can be understood as at least one. "At least one" refers to one or more, and "more" refers to at least two.

[0053] When performing ablation treatment on natural cavities, the inner diameter and length of the cavity will change in different treatment areas. To ensure the safety and effectiveness of the treatment, the treatment part of the ablation device needs to adapt to the changes in the inner diameter and length of the natural cavity.

[0054] The internal diameter and tortuosity of natural cavities often vary significantly. Currently, the size of the tip electrode of the ablation device limits the scope and effectiveness of ablation treatment, especially in small cavities. Cavities often bifurcate and have small diameters. Even when the diameters of cavities are not significantly different, the lengths of cavities with similar diameters can vary. Therefore, it is necessary to have an adjustable diameter for the ablation device, especially the tip electrode.

[0055] In response, embodiments of this disclosure provide an ablation device and an ablation apparatus. The ablation device includes a tube assembly, a pull rod, and a basket electrode. The tube assembly includes a first tube body and a second tube body, the first tube body being fitted within the second tube body, and the first and second tube bodies being movable relative to each other along the axial direction of the first tube body. The pull rod includes a first sub-pull rod within the first tube body and a second sub-pull rod extending beyond the first tube body, with the extension direction of the pull rod parallel to the axial direction of the first tube body. The basket electrode includes a first end and a second end opposite each other along the extension direction of the second sub-pull rod. The first end and the ends of the second sub-pull rods away from the first tube body are connected, and the second end is connected to the end of the first tube body near the second sub-pull rod. When the first and second tube bodies are moved relative to each other until at least the first end of the basket electrode is outside the second tube body, the portion of the basket electrode outside the second tube body is configured to deform under the action of the pull rod.

[0056] In the ablation device provided in the embodiments of this disclosure, when the first tube and the second tube are moved relative to each other until at least the first end of the basket electrode is outside the second tube, the portion of the basket electrode outside the second tube is configured to deform under the action of the pull rod. This allows the relative position of the first and second tubes to be adjusted according to the inner diameter of the cavity where the ablation device is located, thereby adjusting the size of the portion of the basket electrode outside the second tube. Simultaneously, by moving the pull rod, the portion of the basket electrode outside the second tube is deformed, allowing the radial dimension of the basket electrode to be adjusted according to the inner diameter of the cavity where the ablation device is located. Consequently, the basket electrode of this ablation device can fit into cavities with different inner diameters to accommodate cavities with a wider range of inner diameters. For example, when the inner diameter of the cavity is relatively small, the basket electrode can undergo smaller deformation by adjusting the tube assembly and the pull rod. Conversely, when the inner diameter of the cavity is relatively large, the basket electrode can undergo larger deformation by adjusting the tube assembly and the pull rod. For example, in the axial direction of the basket electrode, at least a portion of the basket electrode exposed in the second tube may be 1 / 10, 1 / 5, 1 / 4, 2 / 5, 1 / 2, 3 / 5, 3 / 4, 4 / 5 or all of the entire basket electrode 130. The present disclosure does not limit the size of the basket electrode exposed in the second tube.

[0057] The ablation apparatus and ablation device provided in the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0058] At least one embodiment of this disclosure provides an ablation device. Figure 1 This is a schematic diagram of the structure of an ablation device provided in at least one embodiment of the present disclosure; Figure 2 for Figure 1 The diagram shows the ablation device with a portion of the basket electrode exposed inside the second tube and under the action of the pull rod. Figure 1 and Figure 2 As shown, the ablation device 100 includes a tube assembly 110, a pull rod 120, and a basket electrode 130. The tube assembly 110 includes a first tube body 111 and a second tube body 112, with the first tube body 111 fitted inside the second tube body 112, and the first tube body 111 and the second tube body 112 being movable relative to each other along the axial direction X of the first tube body 111. The pull rod 120 includes a first sub-pull rod 121 within the first tube body 111 and a second sub-pull rod 122 extending beyond the first tube body 111, with the extension direction of the pull rod 120 parallel to the axial direction X of the first tube body 111. The basket electrode 130 includes a first end 131 and a second end 132 opposite each other along the extension direction of the second sub-pull rod 122. The first end 131 and the ends of the second sub-pull rod 122 away from the first tube body 111 are connected, and the second end 132 is connected to the end of the first tube body 111 near the second sub-pull rod 122. When the first tube 111 and the second tube 112 move relative to each other until at least the first end 131 of the basket electrode 130 is outside the second tube 112, the portion of the basket electrode 130 outside the second tube 112 is configured to deform under the action of the pull rod 120.

[0059] In the ablation device 100 provided in the embodiments of this disclosure, when the first tube 111 and the second tube 112 are moved relative to each other until at least the first end 131 of the basket electrode 130 is outside the second tube 112, the portion of the basket electrode 130 outside the second tube 112 is configured to deform under the action of the pull rod 120. Thus, the relative position of the first tube 111 and the second tube 112 can be adjusted according to the inner diameter of the cavity where the ablation device 100 is located, thereby adjusting the size of the portion of the basket electrode 130 outside the second tube 112. At the same time, by moving the pull rod 120, the portion of the basket electrode 130 outside the second tube 112 is deformed, thereby adjusting the radial dimension of the basket electrode 130 according to the inner diameter of the cavity where the ablation device 100 is located. Consequently, the basket electrode 130 of the ablation device 100 can fit with cavities of different inner diameters to be suitable for cavities with a wider range of inner diameters. For example, when the inner diameter of the cavity is relatively small, the basket electrode 130 can undergo a small deformation by adjusting the tube assembly 110 and the pull rod 120. For example, when the inner diameter of the cavity is relatively large, the basket electrode 130 can undergo a larger deformation by adjusting the tube assembly 110 and the pull rod 120. For example, in the axial direction of the basket electrode 130, at least a portion of the basket electrode 130 exposed above the second tube body 112 can be 1 / 10, 1 / 5, 1 / 4, 2 / 5, 1 / 2, 3 / 5, 3 / 4, 4 / 5, or completely exposed. This embodiment of the present disclosure does not limit the size of the basket electrode 130 exposed above the second tube body 112.

[0060] In some examples, such as Figure 1 and Figure 2 As shown, along the axial direction X of the first tube 111, when the end of the second sub-pull rod 122 furthest from the first tube 111 and the end of the first tube 111 closest to the second sub-pull rod 122 are spaced apart by a predetermined distance L, and when both the first end 131 and the second end 132 of the basket electrode 130 are located within the second tube 112, the basket electrode 130 presents a first initial state S0. Therefore, by adjusting the pull rod 120 so that the distance between the end of the second sub-pull rod 122 furthest from the first tube 111 and the end of the first tube 111 closest to the second sub-pull rod 122 is less than the predetermined distance L, the portion of the basket electrode 130 outside the second tube 112 can be deformed. Thus, the opening size of the basket electrode 130 can be adjusted to fit into cavities with different inner diameters, depending on the inner diameter of the cavity where the ablation device 100 is located.

[0061] For example, such as Figure 1 and Figure 2As shown, the predetermined distance L can be substantially equal to the distance along the axial direction between the first end 131 and the second end 132 of the basket electrode 130 when it is not acted upon by the pull rod 120 within the second tube 112. For example, the predetermined distance L can also be substantially equal to the maximum distance that can be separated between the end of the second sub-pull rod 122 away from the first sub-pull rod 121 and the end of the first tube 111 near the second sub-pull rod 122.

[0062] Figure 3 for Figure 1 The diagram shows the structure of the ablation device with a portion of the basket electrode extending from inside the second tube to outside the second tube. Figure 3 As shown, when the second tube 112 moves relative to the first tube 111 until at least the first end 131 of the basket electrode 130 is outside the second tube 112, the basket electrode 130 presents a first predetermined state S1. When the basket electrode 130 presents the first predetermined state S1, the maximum radial dimension D1 of the portion of the basket electrode 130 outside the second tube 112 in a plane perpendicular to the extension direction of the pull rod 120 is greater than the maximum radial dimension D0 of the basket electrode 130 in a plane perpendicular to the extension direction of the pull rod 120 in the first initial state S0. It should be noted that when the basket electrode 130 presents the first predetermined state S1, the pull rod 120 does not act on the basket electrode 130, and the pull rod 120 does not move relative to the first tube 111; depending on the size of the second tube 112 exposed by the basket electrode 130, the basket electrode 130 presents different first predetermined states S1.

[0063] In some examples, such as Figure 2 and Figure 3As shown, when the second tube 112 moves relative to the first tube 111 until at least the first end 131 of the basket electrode 130 is outside the second tube 112, the basket electrode 130 presents a first predetermined state S1. At this time, under the action of the pull rod 120, the basket electrode 130 deforms and presents a second predetermined state S2. In the second predetermined state S2, the maximum radial dimension D2 of the portion of the basket electrode 130 outside the second tube 112 in a plane perpendicular to the extension direction of the pull rod 120 is greater than the maximum radial dimension D1 of the portion of the basket electrode 130 outside the second tube 112 in a plane perpendicular to the extension direction of the pull rod 120 in the first predetermined state S1. Therefore, by adjusting the pull rod 120, the portion of the basket electrode 130 located outside the second tube 112 deforms. This allows the opening size of the basket electrode 130 to be adjusted according to the inner diameter of the cavity where the ablation device 100 is located. Consequently, the basket electrode 130 of the ablation device 100 can fit into cavities with different inner diameters, making it suitable for a wider range of cavities. For example, when the inner diameter of the cavity is relatively small, the basket electrode 130 can undergo a smaller deformation by adjusting the tube assembly 110 and the pull rod 120. Conversely, when the inner diameter of the cavity is relatively large, the basket electrode 130 can undergo a larger deformation by adjusting the tube assembly 110 and the pull rod 120.

[0064] In some examples, the material of the basket electrode 130 can be a nickel-titanium alloy. For example, the basket electrode 130 is formed from nickel-titanium alloy wire. For example, the basket electrode 130 is formed by cutting nickel-titanium alloy tubing or sheets. For example, the basket electrode 130 can be formed by laser shearing or cutting nickel-titanium alloy tubing or sheets into tubular or sheet shapes, and then undergoing heat treatment, borax treatment, pickling, and polishing processes to form the finished product. For example, the two ends of the basket electrode 130 can also be connected together by welding. Of course, the embodiments of this disclosure do not limit the material and forming method of the basket electrode 130.

[0065] In some examples, the basket electrode 130 can be woven from nickel-titanium alloy wire and heat-treated to form a highly elastic shape. For example, the basket electrode 130 can be shaped by a heat treatment process. Of course, the embodiments of this disclosure do not limit the forming process of the basket electrode 130.

[0066] In some examples, when the second tube 112 is moved relative to the first tube 111 until both the first end 131 and the second end 132 of the basket electrode 130 are outside the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 includes at least one of a cylinder, a frustum, a sphere, an elliptical sphere, a gourd-shaped sphere, and a cone with stepped sides. Of course, the embodiments of this disclosure are not limited to the above shapes.

[0067] Figure 4for Figure 1 The diagram shows the structure of the ablation device when the entire basket electrode is located outside the second tube. Figure 4 As shown, when the second tube 112 moves relative to the first tube 111 until both the first end 131 and the second end 132 of the basket electrode 130 are outside the second tube 112, the basket electrode 130 is completely exposed from inside the second tube 112. The shape of the basket electrode 130 in the first predetermined state S1 can be cylindrical. For example, the basket electrode 130 can be formed of nickel-titanium alloy wire.

[0068] In some examples, such as Figure 4 As shown, when the second tube 112 moves relative to the first tube 111 until both the first end 131 and the second end 132 of the basket electrode 130 are outside the second tube 112, the maximum radial dimension D1 of the basket electrode 130 in the first predetermined state S1 can be less than or equal to 25 mm. For example, this maximum radial dimension can be any value between 2 mm and 25 mm, such as 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, 17 mm, 19 mm, 20 mm, 23 mm, or 25 mm. Therefore, the basket electrode 130 of the ablation device 100 can be designed according to the range of radial dimensions of the cavity, so that the basket electrode 130 of the ablation device 100 can fit with cavities of different inner diameters, thus being suitable for cavities with a wider range of inner diameters. It should be noted that at least the first end 131 of the basket electrode 130 is outside the second tube 112, and the basket electrode 130 presents the first predetermined state S1. Figure 4 The first predetermined state S1 is shown when the basket electrode 130 is completely outside the second tube 112, that is, when both the first end 131 and the second end 132 of the basket electrode 130 are outside the second tube 112.

[0069] Figure 5A This is a schematic diagram of the structure of another ablation device according to an embodiment of the present disclosure, where the basket electrode is entirely located outside the second tube. (See diagram below.) Figure 5AAs shown, when the basket electrode 130 is fully exposed inside the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 can be a frustum. For example, the frustum has a smaller radial dimension at the first end 131 near the basket electrode 130 and a larger radial dimension at the second end 132 near the basket electrode 130. Thus, when the inner diameter of the cavity is relatively small, the portion of the basket electrode 130 with a smaller radial dimension near the first end 131 can be extended outside the second tube 112 by adjusting the tube assembly 110, while when the inner diameter of the cavity is relatively large, the portion of the basket electrode 130 with a larger radial dimension near the second end 132 can be extended outside the second tube 112 by adjusting the tube assembly 110. This allows the basket electrode 130 of the ablation device 100 to fit into cavities with different inner diameters, thereby making it suitable for cavities with a wider range of inner diameters. Figure 5A This only schematically illustrates the basket electrode 130, other structures of the ablation device 100, the relationships between these structures, and the deformation of the basket electrode 130 in different radial dimensions under the action of the tube assembly 110 and the pull rod 120. Figures 1 to 4 As shown, it will not be elaborated further here.

[0070] Figure 5B This is a schematic diagram of the structure of another ablation device according to an embodiment of the present disclosure, where the basket electrode is entirely located outside the second tube. (See diagram below.) Figure 5B As shown, when the basket electrode 130 is fully exposed from the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 can be cylindrical. Figure 5B This only schematically illustrates the basket electrode 130, other structures of the ablation device 100, the relationships between these structures, and the deformation of the basket electrode 130 in different radial dimensions under the action of the tube assembly 110 and the pull rod 120. Figures 1 to 4 As shown, it will not be elaborated further here.

[0071] In some examples, such as Figure 5B As shown, the basket electrode 130 can be formed from nickel-titanium alloy tubing or sheet. For example, the basket electrode 130 can be formed by laser shearing or cutting nickel-titanium alloy tubing or sheet into tubular or sheet shapes, followed by heat treatment, borax treatment, pickling, and polishing processes to form the finished product. For example, the two ends of the basket electrode 130 can also be connected together by welding.

[0072] In some examples, such as Figure 5BAs shown, the basket electrode 130 may include multiple electrode sheets 133. The first ends of the multiple electrode sheets 133 are connected to form a first end 131 of the basket electrode 130, and the second ends of the multiple electrode sheets 133 are connected to form a second end 132 of the basket electrode 130. The number of electrode sheets 133 is greater than or equal to 6, and the thickness of each electrode sheet 133 is 0.1 mm to 2 mm. For example, the number of electrode sheets 133 can be 6, 7, 8, 9, 10, 11, 12, 13, etc. For example, the thickness of the electrode sheets 133 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, etc. For example, the thickness of the multiple electrode sheets 133 can be the same, different, or partially the same and partially different. Of course, the embodiments of this disclosure do not limit the number, thickness, shape, etc., of the electrode sheets 133.

[0073] Figure 5C This is a schematic diagram of the structure of another ablation device according to an embodiment of the present disclosure, where the basket electrode is entirely located outside the second tube. (See diagram below.) Figure 5C As shown, when the basket electrode 130 is completely exposed from inside the second tube 112 to outside the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 can be an asymmetrical column. Figure 5C This only schematically illustrates the basket electrode 130, other structures of the ablation device 100, the relationships between these structures, and the deformation of the basket electrode 130 in different radial dimensions under the action of the tube assembly 110 and the pull rod 120. Figures 1 to 4 As shown, it will not be elaborated further here.

[0074] In some examples, such as Figure 5CAs shown, the basket electrode 130 may include multiple electrode pieces 133. The first ends of the multiple electrode pieces 133 are connected to form a first end 131 of the basket electrode 130, and the second ends of the multiple electrode pieces 133 are connected to form a second end 132 of the basket electrode 130. The multiple electrode pieces 133 of the basket electrode 130 include multiple first electrode pieces 133a with a first hardness and multiple second electrode pieces 133b with a second hardness. The first hardness is less than the second hardness, and the number of first electrode pieces 133a is less than the number of second electrode pieces 133b. Therefore, by setting the electrode pieces 133 of the basket electrode 130 to have different hardnesses, when the basket electrode 130 is completely exposed from inside the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 can be an asymmetrical column. Thus, not only can different radial dimensions be deformed in the radial direction of the basket electrode 130 to adapt to cavities of different sizes, but also… The shape of the basket electrode 130 can be made asymmetrical by adjusting the electrode plate 133, so that it can be used in irregular cavities.

[0075] In some examples, such as Figure 5C As shown, multiple first electrode plates 133a are arranged adjacent to each other in sequence, and multiple second electrode plates 133b are arranged adjacent to each other in sequence.

[0076] In some examples, the arrangement density of the electrode sheets 133 of the basket electrode 130 can be set to be different, or the thickness and diameter of the electrode sheets 133 of the basket electrode 130 can be set to be different, or the shape of the electrode sheets 133 of the basket electrode 130 can be set to be different, so that when the basket electrode 130 is completely exposed from inside the second tube 112 to outside the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 can be an asymmetrical column. Of course, the embodiments of this disclosure are not limited in this respect.

[0077] Figure 5D A schematic diagram of the structure of another ablation device provided in an embodiment of the present disclosure when the basket electrode is located outside the second tube; Figure 5E This is a schematic diagram of the structure of another ablation device according to an embodiment of the present disclosure, where the basket electrode is entirely located outside the second tube. (See diagram below.) Figure 5D and 5E As shown, different basket electrodes 130 can be obtained by setting electrode sheets 133 of different shapes and sizes. Figure 5D and Figure 5E Only a schematic diagram of the basket electrode 130 is shown. Other structures of the ablation device 100, the relationships between these structures, and the deformation of the basket electrode 130 in different radial dimensions under the action of the tube assembly 110 and the pull rod 120 are not shown. Figures 1 to 4 As shown, it will not be elaborated further here.

[0078] In some examples, the hardness, shape, size, and arrangement density of the electrode sheet 133 can be adjusted to make the basket electrode 130 completely exposed from inside the second tube 112 to outside the second tube 112. The shape of the basket electrode 130 in the first predetermined state S1 can be an asymmetrical column, which will not be described in detail here.

[0079] Figure 5F This is a schematic diagram of the structure of another ablation device according to an embodiment of the present disclosure, where the basket electrode is entirely located outside the second tube. (See diagram below.) Figure 5F As shown, when the basket electrode 130 is completely exposed from inside the second tube 112 to outside the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 can be a gourd-shaped sphere. For example, the gourd-shaped sphere has a smaller radial dimension at the first end 131 near the basket electrode 130 and a larger radial dimension at the second end 132 near the basket electrode 130. Thus, when the inner diameter of the cavity is relatively small, the portion of the basket electrode 130 with a smaller radial dimension near the first end 131 can be exposed by adjusting the tube assembly 110, while when the inner diameter of the cavity is relatively large, the portion of the basket electrode 130 with a larger radial dimension near the second end 132 can be exposed by adjusting the tube assembly 110. Therefore, the basket electrode 130 of the ablation device 100 can fit with cavities with different inner diameters to accommodate cavities with a wider range of inner diameters. Figure 5B This only schematically illustrates the basket electrode 130, other structures of the ablation device 100, the relationships between these structures, and the deformation of the basket electrode 130 in different radial dimensions under the action of the tube assembly 110 and the pull rod 120. Figures 1 to 4 As shown, it will not be elaborated further here.

[0080] In some examples, the shape of the basket electrode 130 can be asymmetrical when the hardness, shape, size, and arrangement density of the electrode sheet 133 are adjusted so that the basket electrode 130 is completely exposed outside the second tube 112. This will not be elaborated further here.

[0081] In some examples, the basket electrode 130 can be formed from nickel-titanium alloy tubing or sheets. For example, the basket electrode 130 can be laser-cut into tubular or sheet shapes from nickel-titanium alloy tubing or sheets, and then shaped into a gourd-shaped sphere through a heat treatment process. For example, the two ends of the basket electrode 130 can also be connected together by a welding process. The shape of the electrode sheet 133 of the gourd-shaped sphere is not limited in the embodiments of this disclosure; for example, it can be one or more of the following shapes: linear, S-shaped, wavy, spiral, etc.

[0082] In some examples, the gourd-shaped sphere at the first end 131 near the basket electrode 130 can be one of a sphere, an elliptical sphere, a cone, or a cylinder, and at the second end 132 near the basket electrode 130 can be one of a sphere, an elliptical sphere, a cone, or a cylinder. The number of gourd-shaped spheres in this embodiment is not limited; multiple spheres can be combined.

[0083] Figure 5G This is a schematic diagram of the structure of another ablation device according to an embodiment of the present disclosure, where the basket electrode is entirely located outside the second tube. (See diagram below.) Figure 5G As shown, when the basket electrode 130 is completely exposed from inside the second tube 112 to outside the second tube 112, the shape of the basket electrode 130 in the first predetermined state S1 can be a cone with a stepped side. For example, the cone with a stepped side has a smaller radial dimension at the first end 131 near the basket electrode 130 and a larger radial dimension at the second end 132 near the basket electrode 130. Thus, when the inner diameter of the cavity is relatively small, the portion of the basket electrode 130 with a smaller radial dimension near the first end 131 can be exposed by adjusting the tube assembly 110, while when the inner diameter of the cavity is relatively large, the portion of the basket electrode 130 with a larger radial dimension near the second end 132 can be exposed by adjusting the tube assembly 110. Therefore, the basket electrode 130 of the ablation device 100 can fit with cavities with different inner diameters, and can be used for cavities with a wider range of inner diameters. Figure 5B This diagram only schematically illustrates the structure of the basket electrode 130. Other structures of the ablation device 100, the relationships between these structures, and the deformation of the basket electrode 130 in different radial dimensions under the action of the tube assembly 110 and the pull rod 120 are not shown. Figures 1 to 4 As shown, it will not be elaborated further here.

[0084] In some examples, the shape of the basket electrode 130 can be asymmetrical when the hardness, shape, size, and arrangement density of the electrode sheet 133 are adjusted so that the basket electrode 130 is completely exposed outside the second tube 112. This will not be elaborated further here.

[0085] In some examples, the basket electrode 130 can be formed from nickel-titanium alloy tubing or sheets. For example, the basket electrode 130 can be laser-cut from nickel-titanium alloy tubing or sheets into tubular or sheet shapes, and then shaped into a cone with stepped sides through a heat treatment process. For example, the two ends of the plurality of electrode sheets 133 included in the basket electrode 130 can also be connected together by a welding process. The shape of the electrode sheet 133 with stepped sides is not limited in the embodiments of this disclosure; for example, it can be one or more of the following shapes: linear, S-shaped, wavy, spiral, etc.

[0086] In some examples, the stepped cone on the side can be one of a sphere, an elliptical sphere, a cone, or a cylinder at the first end 131 near the basket electrode 130, and one of a sphere, an elliptical sphere, a cone, or a cylinder at the second end 132 near the basket electrode 130.

[0087] Figure 6 This is a schematic diagram of an ablation device provided in one embodiment of the present disclosure; Figure 7 for Figure 6 The diagram shows the ablation device with part of the basket electrode exposed inside the second tube and under the action of the pull rod. Figure 6 and Figure 7 As shown, the ablation device 100 includes a tube assembly 110, a pull rod 120, and a basket electrode 130. The tube assembly 110 includes a first tube body 111 and a second tube body 112, with the first tube body 111 fitted inside the second tube body 112, and the first tube body 111 and the second tube body 112 being movable relative to each other along the axial direction X of the first tube body 111. The pull rod 120 includes a first sub-pull rod 121 within the first tube body 111 and a second sub-pull rod 122 extending beyond the first tube body 111, with the extension direction of the pull rod 120 parallel to the axial direction of the first tube body 111. The basket electrode 130 includes a first end 131 and a second end 132 opposite each other along the extension direction of the second sub-pull rod 122. The first end 131 and the ends of the second sub-pull rod 122 away from the first tube body 111 are connected, and the second end 132 is connected to the end of the first tube body 111 near the second sub-pull rod 122. When the first tube 111 and the second tube 112 move relative to each other until at least the first end 131 of the basket electrode 130 is outside the second tube 112, the portion of the basket electrode 130 outside the second tube 112 is configured to deform under the action of the pull rod 120.

[0088] In the ablation device 100 provided in the embodiments of this disclosure, when the first tube 111 and the second tube 112 are moved relative to each other until at least the first end 131 of the basket electrode 130 is outside the second tube 112, the portion of the basket electrode 130 outside the second tube 112 is configured to deform under the action of the pull rod 120. Thus, the relative position of the first tube 111 and the second tube 112 can be adjusted according to the inner diameter of the cavity where the ablation device 100 is located, thereby adjusting the size of the portion of the basket electrode 130 outside the second tube 112. At the same time, by moving the pull rod 120, the portion of the basket electrode 130 outside the second tube 112 is deformed, thereby adjusting the radial dimension of the basket electrode 130 according to the inner diameter of the cavity where the ablation device 100 is located. Consequently, the basket electrode 130 of the ablation device 100 can fit with cavities of different inner diameters to be suitable for cavities with a wider range of inner diameters. For example, when the inner diameter of the cavity is relatively small, the basket electrode 130 can undergo a small deformation by adjusting the tube assembly 110 and the pull rod 120. For example, when the inner diameter of the cavity is relatively large, the basket electrode 130 can undergo a larger deformation by adjusting the tube assembly 110 and the pull rod 120. For example, in the axial direction of the basket electrode 130, the portion of the basket electrode 130 exposed above the second tube body 112 can be 1 / 10, 1 / 5, 1 / 4, 2 / 5, 1 / 2, 3 / 5, 3 / 4, 4 / 5, or completely exposed. The embodiments of this disclosure do not limit the size of the basket electrode 130 exposed above the second tube body 112. For example, the axial direction of the basket electrode 130 can be parallel to the axial direction X of the first tube body 111.

[0089] In some examples, such as Figure 6 and Figure 7 As shown, the basket electrode 130 can be formed of conductive metal wire or conductive alloy wire. Therefore, the portion of the basket electrode 130 located outside the second tube 112 can deform under the action of the pull rod 120, thereby adjusting the radial dimension of the basket electrode 130. It should be noted that... Figure 1 The basket electrode 130 shown can not only deform under the action of the pull rod 120, but also undergo self-expansion deformation when it is not restricted by the second tube 112. Figure 6 The basket electrode 130 shown needs to deform under the action of the pull rod 120. Of course, the material of the basket electrode 130 is not limited in this embodiment.

[0090] In some examples, such as Figure 6 and Figure 7As shown, along the axial direction X of the first tube 111, when the end of the second sub-pull rod 122 furthest from the first tube 111 and the end of the first tube 111 closest to the second sub-pull rod 122 are spaced apart by a predetermined distance L, and when both the first end 131 and the second end 132 of the basket electrode 130 are located within the second tube 112, the basket electrode 130 presents a first initial state S0. Therefore, by adjusting the pull rod 120, the distance between the end of the second sub-pull rod 122 furthest from the first tube 111 and the end of the first tube 111 closest to the second sub-pull rod 122 is less than the predetermined distance L, thereby causing deformation of the portion of the basket electrode 130 outside the second tube 112. Thus, the opening size of the basket electrode 130 can be adjusted to fit cavities with different inner diameters, depending on the inner diameter of the cavity where the ablation device 100 is located.

[0091] In some examples, such as Figure 6 and Figure 7 As shown, the predetermined distance L can be substantially equal to the distance along the axial direction between the first end 131 and the second end 132 of the basket electrode 130 when it is not acted upon by the pull rod 120 within the second tube 112. For example, the predetermined distance L can also be substantially equal to the furthest possible distance between the end of the second pull rod 122 away from the first pull rod 121 and the end of the first tube 111 near the second pull rod 122. For example, the predetermined distance L can be substantially equal to the furthest distance the basket electrode 130 extends along its axis, in which case the basket electrode 130 is in a retracted state, the basket electrode 130 has a small radial dimension, and the basket electrode 130 is in a straight state, a nearly straight state, or a curved state as the pull rod 120 bends.

[0092] Figure 8 for Figure 6 The diagram shows the ablation device with the basket electrode fully exposed inside the second tube. Figure 8 As shown, when the second tube 112 moves relative to the first tube 111 until both the first end 131 and the second end 132 of the basket electrode 130 are outside the second tube 112, the basket electrode 130 is completely exposed from inside the second tube 112. Under the action of the pull rod 120, the shape of the basket electrode 130 can be cylindrical. For example, by adjusting the pull rod 120, as the predetermined distance L decreases, the radial dimension of the basket electrode 130 gradually increases, and the shape of the basket electrode 130 can be deformed into a sphere or a flattened sphere, etc. Therefore, the radial dimension of the basket electrode 130 can be adjusted by adjusting the pull rod 120. Thus, the basket electrode 130 of the ablation device 100 can fit into cavities with different inner diameters, making it applicable to cavities with a wider range of inner diameters.

[0093] In some examples, the basket electrode 130 is completely exposed inside the second tube 112. The shape of the basket electrode 130 under the action of the pull rod 120 can also be at least one of a frustum, a sphere, an elliptical sphere, a gourd-shaped sphere, and a cone with stepped sides. Of course, the embodiments of this disclosure do not limit the shape of the basket electrode 130 under the action of the pull rod 120.

[0094] In some examples, the basket electrode 130 is fully exposed within the second tube 112, and the maximum radial dimension of the basket electrode 130 under the action of the pull rod 120 can be less than or equal to 25 mm. For example, this maximum radial dimension can be any value between 2 mm and 25 mm, such as 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, 17 mm, 19 mm, 20 mm, 23 mm, or 25 mm. Therefore, the basket electrode 130 of the ablation device 100 can be designed according to the range of radial dimensions of the cavity, so that the basket electrode 130 of the ablation device 100 can fit into cavities with different inner diameters, and can be applied to cavities with a wider range of inner diameters.

[0095] In some examples, the shape of the basket electrode 130 under the action of the pull rod 120 can be the same as... Figures 5A to 5G The structure or shape of any one or more combinations thereof will not be described further here.

[0096] For example, when the basket electrode 130 is shaped like a gourd-shaped sphere or a cone with a stepped side under the action of the pull rod 120, the basket electrode 130 has a smaller radial dimension at its first end 131 and a larger radial dimension at its second end 132. Therefore, when the inner diameter of the cavity is relatively small, the portion of the basket electrode 130 with a smaller radial dimension near the first end 131 can be exposed by adjusting the tube assembly 110. Conversely, when the inner diameter of the cavity is relatively large, the portion of the basket electrode 130 with a larger radial dimension near the second end 132 can be exposed by adjusting the tube assembly 110. This allows the basket electrode 130 of the ablation device 100 to fit into cavities of different inner diameters, making it suitable for cavities with a wider range of inner diameters.

[0097] In some examples, the material of the basket electrode 130 can be a conductive metal or a conductive alloy. For example, the basket electrode 130 is formed from conductive metal wire or conductive alloy wire. For example, the basket electrode 130 is formed by shearing or cutting conductive metal tubing or conductive alloy tubing. For example, the material of the basket electrode 130 can be nickel-titanium alloy, cobalt-chromium alloy, 316L stainless steel, 304 stainless steel, etc. Of course, the embodiments of this disclosure do not limit the material and formation of the basket electrode 130.

[0098] Figure 9A This is a schematic diagram showing the state of the ablation device provided in an embodiment of the present disclosure within a small cavity of a bifurcated cavity; Figure 9B This is a schematic diagram illustrating the state of the ablation device provided in one embodiment of the present disclosure within the large cavity of a bifurcated cavity. (See diagram below.) Figure 9A and Figure 9B As shown, the diameter of the smaller bifurcated cavity is Dm, and the diameter of the larger bifurcated cavity is Dn, where Dm is smaller than Dn. Figure 9A As shown, when in a small cavity, the movement of the second tube 112 can be controlled so that only a portion of the basket electrode 130 is exposed. Simultaneously, by controlling the pull rod 120, the radial dimension of the basket electrode 130 opening can be adjusted to better fit the small cavity, thus performing ablation treatment on the small cavity. Figure 9B As shown, in the case of a large cavity, the movement of the second tube 112 can be controlled, allowing a portion of the basket electrode 130 to protrude outside the second tube 112, or allowing the entire basket electrode 130 to protrude outside the second tube 112. Simultaneously, by controlling the pull rod 120, the radial dimension of the opening of the basket electrode 130 can be adjusted to better fit the large cavity, thus facilitating ablation treatment of the large cavity. Therefore, the basket electrode 130 of this ablation device 100 can fit into cavities with different inner diameters, making it suitable for a wider range of inner diameters and achieving better ablation. It should be noted that... Figure 9B The example described is based on the basket electrode 130 extending entirely beyond the second tube 112. However, the embodiments disclosed herein are not limited to this. In the large cavity, the basket electrode 130 may extend only a portion beyond the second tube 112. By adjusting the size of the portion of the basket electrode 130 extending beyond the second tube 112 and adjusting the displacement of the pull rod 120, the radial dimension of the opening of the basket electrode 130 can be adjusted so that the basket electrode 130 fits the large cavity.

[0099] For example, such as Figure 9B As shown, the maximum radial dimension D2 of the basket electrode 130 opening can be set to be greater than or equal to Dn, or the maximum radial dimension D2 can also be set to the dimension that the large cavity can withstand.

[0100] Figure 10 A schematic diagram of the structure of another ablation device provided in an embodiment of this disclosure; Figure 11 for Figure 10 The diagram shows the ablation device with its basket electrode and electrode structure fully exposed outside the second tube. (See attached diagram.) Figure 10 and Figure 11As shown, the ablation device 100 also includes an electrode structure 140 disposed on the side of the basket electrode 130 away from the first tube body 111, and the electrode structure 140 is connected to the first end 131 of the basket electrode 130. Therefore, by providing the electrode structure 140, not only can the ablation efficiency of the ablation device 100 be increased, but the ablation device 100 can also be better adapted to cavities of different sizes. Of course, the embodiments of this disclosure do not limit the form of the electrode structure 140.

[0101] In some examples, such as Figure 10 and Figure 11 As shown, the electrode structure 140 is connected to the first end 131 of the basket electrode 130 via welding. Of course, the embodiments of this disclosure do not limit the method of connection between the electrode structure 140 and the first end 131 of the basket electrode 130. For example, the electrode structure 140 and the basket electrode 130 can also be connected by detachable methods such as snap-fit ​​or screw-fit.

[0102] In some examples, such as Figure 10 and Figure 11 As shown, the electrode structure 140 is configured to be fully located within the second tube 112, presenting a second initial state T0; when the second tube 112 moves relative to the first tube 111 until the electrode structure 140 is completely outside the second tube 112, it presents a third predetermined state T1. In the third predetermined state T1, the maximum radial dimension D4 of the electrode structure 140 in a plane perpendicular to its axial direction is greater than the maximum radial dimension D3 of the electrode structure 140 in a plane perpendicular to its axial direction in the second initial state T0. Therefore, the electrode structure 140 can be designed according to the dimensions of the cavity, so that in the third predetermined state T1, the maximum radial dimension D4 of the electrode structure 140 in a plane perpendicular to its axial direction can better fit the cavity. The embodiments of this disclosure do not limit the maximum radial dimension D4 of the electrode structure 140 in a plane perpendicular to its axial direction in the third predetermined state T1, and can be designed or matched according to the cavity dimensions. For example, the axial direction of the electrode structure 140 can be parallel to the axial direction X of the first tube 111.

[0103] In some examples, such as Figure 11 As shown, in the third predetermined state T1, the maximum radial dimension D4 of the electrode structure 140 in the plane perpendicular to its axis is less than or equal to the maximum radial dimension D1 of the basket electrode 130 in the plane perpendicular to its axis in the first predetermined state S1. Therefore, the electrode structure 140 can be used for smaller cavity sizes, and the basket electrode 130 can be used for larger cavity sizes, making the ablation device 100 suitable for a wider range of cavity sizes, thus allowing the ablation device 100 to be better suited for more cavity environments.

[0104] In some examples, such as Figure 11 As shown, in the third predetermined state T1, the maximum radial dimension of the electrode structure 140 in the plane perpendicular to its axis ranges from 2 mm to 10 mm. Therefore, the electrode structure 140 can be adapted to smaller cavity sizes, thereby enabling the ablation device 100 to be better suited for a wider range of cavity environments.

[0105] In some examples, the shape of the electrode structure 140 in the third predetermined state T1 includes at least a portion of at least one of a cylinder, a frustum, a sphere, an ellipsoidal sphere, a gourd-shaped sphere, and a cone with stepped sides. Of course, the embodiments of this disclosure do not limit the shape of the electrode structure 140 in the third predetermined state T1.

[0106] In some examples, the electrode structure 140 may include Figures 5A to 5F The structure and shape of any one or more combinations thereof will not be elaborated here.

[0107] In some examples, the electrode structure 140 may include Figures 5A to 5F Any partial structure and shape, for example, can be any 1 / 10, 1 / 5, 1 / 4, 2 / 5, 1 / 2, 3 / 5, 3 / 4, or 4 / 5 portion along its axial direction. The embodiments disclosed herein are not limited in this respect.

[0108] In some examples, such as Figure 11 As shown, electrode structure 140 is a semi-basket electrode structure. For example, electrode structure 140 can have the same structure as basket electrode 130, but electrode structure 140 is a semi-basket electrode structure. This makes it easier to fabricate basket electrode 130 and electrode structure 140.

[0109] Figure 12 This is a schematic diagram of a third predetermined state of an electrode structure provided in an embodiment of the present disclosure. (See diagram below.) Figure 12 As shown, the electrode structure 140 can be helical.

[0110] Figure 13 This is a schematic diagram of a third predetermined state of an electrode structure provided in an embodiment of the present disclosure. (See diagram below.) Figure 13 As shown, the electrode structure 140 can be in the shape of a sodium thiosulfate tube.

[0111] In some examples, the electrode structure 140 can be formed from nickel-titanium alloy tubing or sheets. For example, the electrode structure 140 can be formed by laser shearing or cutting nickel-titanium alloy tubing or sheets into tubular or sheet shapes, followed by heat treatment, borax treatment, pickling, and polishing processes to form the finished product. For example, the electrode structure 140 can also be shaped by heat treatment. For example, the electrode structure 140 can be shaped into a highly elastic shape by heat treatment of nickel-titanium alloy wire braid. For example, the electrode structure 140 can be woven into a mesh by nickel-titanium alloy wire. For example, at least one end of the electrode structure 140 can also be connected together by welding.

[0112] In some examples, electrode structure 140 can be connected to the first end 131 of basket electrode 130 via a connecting structure configured to allow electrode structure 140 to deflect. This allows electrode structure 140 to deflect, thereby enabling better fit between electrode structure 140 and the cavity.

[0113] In some examples, electrode structure 140 can be connected via a conductive elastic structure. For example, electrode structure 140 can be connected via a conductive spring, thereby allowing electrode structure 140 to deflect or rotate relative to the cavity, and thus allowing electrode structure 140 to make better contact with the cavity. Of course, the embodiments of this disclosure are not limited to the connection structure.

[0114] In some examples, electrode structure 140 can be connected to the second end 132 of basket electrode 130 via a dot structure, sheet structure, strip structure, or tubular structure. Thus, electrode structure 140 can be deflected or rotated relative to the cavity, thereby achieving better contact with the cavity.

[0115] Figure 14 This is a schematic diagram illustrating the state of the ablation device provided in an embodiment of this disclosure within a bifurcation cavity. Figure 14As shown, the diameter of the smaller cavity of the bifurcated cavity is Dk, and the diameter of the larger cavity is Dn, where Dk is less than Dn. For example, in the third predetermined state T1, the electrode structure 140 of the ablation device 100 can be configured such that its maximum radial dimension D4 in the plane perpendicular to its axis is greater than or equal to Dk, or the maximum radial dimension D4 can be set to a size that the smaller cavity can withstand. For example, the maximum radial dimension D4 can also be set to be less than the maximum radial dimension D1 of the basket electrode 130 in the plane perpendicular to its axis in the first predetermined state S1. In the smaller cavity, by controlling the movement of the second tube 112, the electrode structure 140 is completely exposed from inside the second tube 112 to outside the second tube 112, so that the electrode structure 140 can fit into the smaller cavity. Simultaneously, the movement of the second tube 112 is controlled so that part or all of the basket electrode 130 protrudes from inside the second tube 112 and outside the second tube 112. The pull rod 120 is adjusted according to the radial dimension of the large cavity to ensure that the basket electrode 130 fits snugly against the large cavity. It should be noted that... Figure 14 The example is based on the full exposure of the basket electrode 130. However, the embodiments disclosed herein are not limited to this. The basket electrode 130 may also be partially exposed in the large cavity. By adjusting the size of the exposed part of the basket electrode 130 and adjusting the pull rod 120 to move it, the radial dimension of the opening of the basket electrode 130 can be adjusted so that the basket electrode 130 fits the large cavity.

[0116] In some examples, the ultra-thin bronchoscope is a novel type of bronchoscope that is thinner than the conventional bronchoscope. The outer diameter of a conventional fiberoptic bronchoscope is approximately 4.9 mm to 6.2 mm, reaching bronchial lumens of levels 4 to 6. The outer diameter of an ultra-thin bronchoscope is approximately 2.2 mm to 3.6 mm, reaching bronchial lumens of levels 5 to 11, allowing observation of more distant bronchial lumens. When the ablation device 100 provided in the embodiments of this disclosure treats the distal lung using the ultra-thin bronchoscope, it can reach bronchial lumens of levels 5 to 11. Therefore, by controlling the movement of the second tube 112 and the pull rod 120, the radial dimension of the basket electrode 130 and the electrode structure 140 can be controlled, thereby enabling ablation treatment of cavities at different levels.

[0117] One embodiment of this disclosure also provides an ablation device. Figure 15 This is a schematic diagram of an ablation device provided in one embodiment of the present disclosure. Figure 15As shown, the ablation device 200 includes any of the aforementioned ablation devices 100 and a control handle 210. The control handle 210 includes a first control switch 211 and a second control switch 212, and is located on the side of the first sub-pull rod 121 away from the basket electrode 130. The first control switch 211 is connected to the end of the first sub-pull rod 121 away from the basket electrode 130 and is configured to control the pull rod 120 to move relative to the first tube body 111 along its extension direction. The second control switch 212 is connected to the end of the second tube body 112 away from the basket electrode 130 and is configured to control the second tube body 112 to move relative to the first tube body 111 along its axial direction. Thus, the movement of the pull rod 120 and the second tube body 112 can be achieved through the first control switch 211 and the second control switch 212 of the control handle 210. Of course, the embodiments of this disclosure do not limit the connection method between the first control switch 211 and the pull rod 120, or the connection method between the second control switch 212 and the second tube 112.

[0118] In some examples, such as Figure 15 As shown, the control handle 210 also includes a handle body 213, on which a groove 213a is provided along the extending direction of the pull rod 120. A first control switch 211 can be disposed on the groove 213a. Thus, the first control switch 211 can slide on the groove 213a along the extending direction of the groove 213a to move the pull rod 120.

[0119] In some examples, such as Figure 15 As shown, the dimension of the groove 213a along the extension direction of the groove 213a can be greater than or equal to the dimension of the predetermined distance L.

[0120] In some examples, such as Figure 15 As shown, the second control switch 212 can be a knob.

[0121] In some examples, such as Figure 15 As shown, along the direction from the basket electrode 130 to the control handle 210, the first tube 111 includes a first sub-section 111a, a second sub-section 111b, and a third sub-section 111c connected in sequence. The hardness of the first sub-section 111a is less than that of the second sub-section 111b, and the hardness of the second sub-section 111b is less than that of the third sub-section 111c. This arrangement ensures that during ablation, the hardness of the first sub-section 111a is less than that of other parts of the first tube 111, and the hardness of the second sub-section 111b is the next lowest. This facilitates bending of the basket electrode 130, making its control more flexible and improving the ablation efficiency of the ablation device 200.

[0122] In some examples, such as Figure 15 As shown, in the ablation device 200, the first sub-section 111a of the first tube body has a dimension of 20 mm to 100 mm in the extension direction of the pull rod 120. For example, this dimension can be 30 mm to 50 mm. For example, this dimension can be 40 mm to 60 mm. For example, this dimension can be 35 mm to 55 mm. For example, this dimension can be 25 mm to 75 mm, but the embodiments of this disclosure are not limited to these.

[0123] In some examples, such as Figure 15 As shown, in the ablation device 200, at least one of the materials of the first sub-section 111a and the second sub-section 111b of the first tube body may include polyether block polyamide, and the material of the third sub-section 111c of the first tube body may include at least one of polyether block polyamide and polydodecanoic acid, but the embodiments of this disclosure are not limited thereto. This allows the first tube body 111 to have good flexibility.

[0124] In some examples, the ablation device 200 also includes a power cord 220, a basket electrode 130, and a connection between the power cord 220 and the basket electrode 130, through which electrical energy is transferred. For example, the power cord 220 may be connected to a power connector.

[0125] Figure 16A A schematic diagram of the basket electrode and pull rod in another ablation device provided in an embodiment of this disclosure; Figure 16B for Figure 16A An exploded view of the tie rod of the ablation device. (See diagram below.) Figure 16A and Figure 16B As shown, the first sub-rod 121 includes a first sub-section 121a and a second sub-section 121b detachably connected. Along the extension direction of the rod 120, the first sub-section 121a is closer to the basket electrode 130 than the second sub-section 121b. Therefore, when the first sub-section 121a and the second sub-section 121b are disassembled, the flexibility of the portion of the first tube 111 located between the first sub-section 121a and the second sub-section 121b is effectively improved, facilitating the bending of the basket electrode 130 within the cavity, thereby giving the ablation device 200 containing the rod 120 good flexibility. For example, when the ablation device 200 needs to be bent, the first sub-section 121a and the second sub-section 121b of the first sub-pull rod are disconnected from each other to enhance the flexibility of the pull rod 120 and facilitate the bending operation. For example, when the bending operation is completed, the first sub-section 121a and the second sub-section 121b of the first sub-pull rod are reconnected, thereby enabling the basket electrode 130 of the ablation device 200 to perform an overall ablation operation.

[0126] For example, such as Figure 16A and Figure 16B As shown, the first sub-section 121a of the first sub-pull rod can be a portion of the first sub-pull rod 121 near the basket electrode 130. For example, the dimension of the first sub-section 121a of the first sub-pull rod in the extending direction of the pull rod 120 can be 5 mm to 10 mm, but the embodiments of this disclosure are not limited thereto. For example, the second sub-section 121b of the first sub-pull rod can be a portion of the first sub-pull rod 121 excluding the second sub-section 121b, but the embodiments of this disclosure are not limited thereto.

[0127] For example, such as Figure 16A and Figure 16B As shown, the first sub-part 121a and the second sub-part 121b of the first sub-pull rod can be threadedly connected, but the embodiments of this disclosure are not limited thereto. For example, the end of the second sub-part 121b of the first sub-pull rod away from the first sub-pull rod 121a can be connected to... Figure 15 The control handle 210 shown is connected to control the connection or disconnection of the first sub-rod first sub-part 121a and the second sub-rod first sub-part 121b at position 123, but the embodiments of this disclosure are not limited thereto. Therefore, the connection or disconnection between the first sub-rod first sub-part 121a and the second sub-rod first sub-part 121b can be made more flexible and controllable by the control handle 210, thereby enhancing the ablation efficiency of the ablation device 200.

[0128] The ablation device 100 and ablation equipment 200 of this disclosure do not limit the ablation method. For example, it can be radiofrequency ablation, pulsed electric field ablation, etc.

[0129] The ablation device 100 and ablation apparatus 200 of this disclosure can be used for ablation within natural cavities. Natural cavities may include the nasal cavity, esophagus, trachea, digestive tract, ear canal, oral cavity, etc.

[0130] The following points need to be explained:

[0131] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0132] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure can be combined with each other.

[0133] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An ablation device, comprising: The tube assembly includes a first tube body and a second tube body, wherein the first tube body is sleeved in the second tube body, and the first tube body and the second tube body are movable relative to each other along the axial direction of the first tube body; The pull rod includes a first sub-pull rod in the first tube and a second sub-pull rod extending outside the first tube, and the extension direction of the pull rod is parallel to the axial direction of the first tube; as well as The basket electrode includes a first end and a second end opposite to each other along the extending direction of the second sub-rod. Wherein, the first end and the end of the second sub-pull rod away from the first tube body are connected, and the second end and the end of the first tube body near the second sub-pull rod are connected; When the first tube and the second tube move relative to each other until at least the first end of the basket electrode is outside the second tube, the portion of the basket electrode outside the second tube is configured to deform under the action of the pull rod. Along the axial direction of the first tube, when the end of the second sub-rod furthest from the first tube is spaced a predetermined distance from the end of the first tube closest to the second sub-rod, and when both the first and second ends of the basket electrode are located within the second tube, the basket electrode presents a first initial state. The predetermined distance is equal to the distance along the axial direction of the first tube between the first and second ends of the basket electrode when the basket electrode is not acted upon by the rod within the second tube. When the second tube moves relative to the first tube until at least the first end of the basket electrode is outside the second tube, the basket electrode presents a first predetermined state. In this first predetermined state, the maximum radial dimension of the portion of the basket electrode outside the second tube in a plane perpendicular to the extension direction of the pull rod is greater than the maximum radial dimension of the basket electrode in a plane perpendicular to the extension direction of the pull rod in the first initial state. The end of the second sub-pull rod away from the first tube is spaced apart from the end of the first tube near the second sub-pull rod by the predetermined distance. The distance between the first end and the second end of the basket electrode along its axial direction is equal to the predetermined distance. Under the action of the pull rod, the basket electrode presents a second predetermined state. In the second predetermined state, the maximum radial dimension of the portion of the basket electrode located outside the second tube in a plane perpendicular to the extension direction of the pull rod is greater than the maximum radial dimension of the portion of the basket electrode located outside the second tube in a plane perpendicular to the extension direction of the pull rod in the first predetermined state. In the first predetermined state and the second predetermined state, a portion of the basket electrode is located outside the second tube body, and another portion is located inside the second tube body.

2. The ablation device according to claim 1, wherein, The first end and the second end of the basket electrode are both located outside the second tube, and the distance between the first end and the second end of the basket electrode along the axial direction of the first tube is equal to the predetermined distance.

3. The ablation device according to claim 2, wherein, The maximum radial dimension of the basket electrode in the first predetermined state is less than or equal to 25 mm.

4. The ablation device according to claim 1, wherein, In the axial direction of the basket electrode, the portion of the basket electrode located outside the second tube body is 1 / 10, 1 / 5, 1 / 4, 2 / 5, 1 / 2, 3 / 5, 3 / 4, or 4 / 5 of the entire basket electrode.

5. The ablation device according to claim 1, wherein, When the second tube moves relative to the first tube until both the first end and the second end of the basket electrode are outside the second tube, the shape of the basket electrode in the first predetermined state includes at least one of a cylinder, a frustum, a sphere, an elliptical sphere, a gourd-shaped sphere, and a cone with stepped sides.

6. The ablation device according to claim 1, wherein, The basket electrode includes multiple electrode sheets, the first ends of which are connected to form the first end of the basket electrode, and the second ends of which are connected to form the second end of the basket electrode. The number of the multiple electrode sheets is greater than or equal to 6, and the thickness of each electrode sheet is 0.1 mm to 2 mm.

7. The ablation device according to claim 6, wherein, The plurality of electrode sheets include a plurality of first electrode sheets having a first hardness and a plurality of second electrode sheets having a second hardness, wherein the first hardness is less than the second hardness, and the number of first electrode sheets is less than the number of second electrode sheets.

8. The ablation device according to claim 7, wherein, Multiple first electrode plates are arranged adjacent to each other in sequence, and multiple second electrode plates are arranged adjacent to each other in sequence.

9. The ablation device according to any one of claims 1 to 8, further comprising an electrode structure disposed on the side of the basket electrode away from the first tube body, wherein, The electrode structure is connected to the first end of the basket electrode.

10. The ablation device according to claim 9, wherein, The electrode structure is configured to: present a second initial state when fully located within the second tube; and present a third predetermined state when the second tube moves relative to the first tube until the electrode structure is completely outside the second tube. In the third predetermined state, the maximum radial dimension of the electrode structure in the plane perpendicular to its axis is greater than the maximum radial dimension of the electrode structure in the plane perpendicular to its axis in the second initial state.

11. The ablation device according to claim 10, wherein, In the third predetermined state, the maximum radial dimension of the electrode structure in a plane perpendicular to its axis is less than or equal to the maximum radial dimension of the basket electrode in a plane perpendicular to its axis in the first predetermined state.

12. The ablation device according to claim 10, wherein, In the third predetermined state, the maximum radial dimension of the electrode structure in the plane perpendicular to its axis ranges from 2 mm to 10 mm.

13. The ablation device according to claim 10, wherein, The electrode structure in the third predetermined state has at least a portion of at least one of the following: a cylinder, a frustum, a sphere, an elliptical sphere, a gourd-shaped sphere, and a cone with stepped sides.

14. The ablation device according to any one of claims 10 to 13, wherein, The electrode structure is a semi-basket electrode structure.

15. The ablation device according to any one of claims 10 to 13, wherein, The electrode structure is connected to the first end of the basket electrode via a connecting structure, the connecting structure being configured to allow the electrode structure to deflect.

16. An ablation device, comprising: The ablation device as described in any one of claims 1 to 15; as well as The control handle includes a first control switch and a second control switch, and the control handle is located on the side of the first sub-pull rod away from the basket electrode. The first control switch is connected to the end of the first sub-pull rod away from the basket electrode and is configured to control the pull rod to move relative to the first tube body along its extension direction. The second control switch is connected to the end of the second tube body away from the basket electrode and is configured to control the second tube body to move relative to the first tube body along its axial direction.

17. The ablation device according to claim 16, wherein, The first sub-rod includes a first sub-rod first portion and a first sub-rod second portion that are detachably connected, with the first sub-rod first portion being closer to the basket electrode than the first sub-rod second portion along the extension direction of the rod.

18. The ablation device according to claim 17, wherein, The first part of the first sub-rod is threadedly connected to the second part of the first sub-rod.

19. The ablation device according to claim 16, wherein, Along the direction from the basket electrode to the control handle, the first tube body includes a first tube body first sub-section, a first tube body second sub-section, and a first tube body third sub-section connected in sequence. The hardness of the first tube body first sub-section is less than the hardness of the first tube body second sub-section, and the hardness of the first tube body second sub-section is less than the hardness of the first tube body third sub-section.

20. The ablation device according to claim 19, wherein, The first tube body has a first sub-section with a dimension of 20 mm to 100 mm in the extension direction of the pull rod. The material of at least one of the first tube body and the second tube body includes polyether block polyamide, and the material of the third tube body includes at least one of polyether block polyamide and polydodecanoic acid.

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