Ablation device

Abstract

The invention relates to the field of medical instruments, in particular to an ablation device which comprises a conveying pipe, a supporting body, a channel pipe and an ablation assembly, the far end of the conveying pipe is connected with the supporting body, the supporting body comprises a plurality of supporting pieces, the channel pipe is arranged in the conveying pipe in a sleeved mode, the channel pipe is connected with the supporting pieces, and the ablation assembly is arranged in the channel pipe; the device further comprises an auxiliary orientation structure, the auxiliary orientation structure comprises a connecting piece arranged at the far end of the channel pipe and a matching piece movably connected with the connecting piece, the ablation assembly is sleeved with the matching piece, and the ablation assembly drives the matching piece to make the matching piece move relative to the connecting piece. The ablation assembly can stably move back and forth in the axial direction, puncture is carried out at the target position, supporting force can be provided for the ablation section, and after the ablation assembly completes ablation at one position, ablation at other positions can be carried out.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and in particular relates to an ablation device. Background Art

[0002] Hypertrophic cardiomyopathy is a common autosomal dominant cardiovascular disease with an incidence of about 1:500 in the general population and a mortality rate of about 1.4%-2.2%. It is the most common cause of sudden death in young people and athletes. The main manifestation of hypertrophic cardiomyopathy is hypertrophy of one or more segments of the left ventricle, and the general diagnostic standard is a thickness greater than or equal to 15mm. When the anterior leaflet of the mitral valve moves forward during systole and abuts against the ventricular septum, causing stenosis or even obstruction of the left ventricular outflow tract, that is, when the pressure gradient in the left ventricular outflow tract is too large, it is called obstructive hypertrophic cardiomyopathy.

[0003] At present, the treatment strategy for obstructive hypertrophic cardiomyopathy is to expand the left ventricular outflow tract to reduce the pressure difference and alleviate its obstruction. Commonly used treatment methods mainly include drug therapy, ventricular septal resection and ventricular septal alcohol ablation, but these methods have disadvantages such as high surgical risk or poor treatment effect. In recent years, some new technologies for the treatment of obstructive hypertrophic cardiomyopathy have also been disclosed, such as using a radiofrequency ablation needle to enter the myocardium through the apical path for radiofrequency ablation, or using a radiofrequency ablation electrode to enter the heart cavity through the vascular path for radiofrequency ablation. Although these methods have certain advantages over traditional methods, these ablation devices with radiofrequency ablation effects are more traumatic during ablation operations and have low controllability. The spatial structure inside the heart is complex, and the ablation needle has undergone multiple bends before reaching the lesion. It is difficult for the distal end of the ablation needle to directly penetrate the target position. The ablation needle does not have sufficient support and there is no structure to guide the ablation needle.

[0004] Therefore, how to design an ablation system that can simultaneously guide the direction of the ablation needle and ensure that the ablation needle stably penetrates the target tissue is a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an ablation device to address the problems of difficulty in adjusting the direction of an ablation needle in the heart and difficulty in accurately and straightly inserting the ablation needle into the lesion.

[0006] The object of the present invention is achieved through the following solutions: An ablation device includes a delivery tube, a support body, a channel tube and an ablation component, wherein the distal end of the delivery tube is connected to the support body, the support body includes a plurality of support members, the channel tube is sleeved in the delivery tube, the channel tube is connected to the support member, and the ablation component is arranged in the channel tube; and further includes an auxiliary orientation structure, the auxiliary orientation structure includes a connecting member arranged at the distal end of the channel tube and a matching member forming a movable connection with the connecting member, the matching member is sleeved outside the ablation component, and the ablation component drives the matching member so that the matching member moves relative to the connecting member.

[0007] The purpose of the present invention can be further achieved by the following technical solutions: In one embodiment, the ablation assembly includes at least two ablation needles arranged side by side, the ablation needle includes an ablation segment and a bendable segment, the ablation segment is arranged at the farthest end of the ablation needle; and, when pre-installed, the ablation segment is sleeved in the matching piece, and the matching piece does not extend beyond the connecting piece.

[0008] In one embodiment, the ablation segment and the matching piece are exposed from the connecting piece in sequence, the ablation segment penetrates into the lesion tissue, and the matching piece contacts the lesion tissue; and, the ablation segment and the bendable segment are made of different materials, the friction force of the bendable segment is greater than that of the ablation segment, and the bendable segment can more easily drive the matching piece to move.

[0009] In one embodiment, the ablation segment is made of metal material, and the bendable segment is made of polymer material.

[0010] In one embodiment, the connecting piece directly abuts against the target tissue, the ablation segment enters the target tissue, and the engaging piece does not come out of the connecting piece.

[0011] In one embodiment, the ablation segment is completely exposed outside the connecting piece and has not yet contacted the target tissue. The ablation segment continues to move distally until the bendable segment contacts the matching piece. When the bendable segment moves distally, it drives the matching piece to move distally, so that the ablation segment can still maintain the original straight path and pierce the tissue.

[0012] In one embodiment, the mating piece includes a double-track channel and a sliding block, the connecting piece includes a limiting track, and the sliding block slides within the limiting track; and the double-track channel is loosely connected to the ablation component, and the ablation component drives the mating piece to move through friction.

[0013] In one embodiment, the sliding blocks are located on both sides of the double-track channel relative to the double-track channel.

[0014] In one embodiment, the friction force between the ablation component and the mating piece is greater than the friction force between the connecting piece and the mating piece.

[0015] In one embodiment, it further comprises a control member connected to the distal end of the support body, wherein the support body is in the shape of a rugby ball in a natural state, and the support body is in the shape of a pumpkin by pulling the control member.

[0016] In one embodiment, by pulling the control member, the support body changes from a slender shape to a round and thick shape.

[0017] In one embodiment, the support body is a mesh structure.

[0018] In one embodiment, the support member is Y-shaped, V-shaped, or straight-shaped; and the support body further includes a reinforcing unit arranged in the middle thereof, the diameter of the reinforcing unit is the maximum diameter of the support body, and the support member is connected to the reinforcing unit.

[0019] In one embodiment, the support member includes an arc segment and a rest segment, the distal end of the channel tube is connected to the rest segment, and the two are movably connected via a thin rope or a thin wire; and, in a natural state, the connecting member at least partially extends beyond the outer circumference of the rest segment.

[0020] In one embodiment, the channel tube is bent within the support body, and the channel tube is J-shaped.

[0021] In one embodiment, the connecting member is disposed below the reinforcing unit.

[0022] In another embodiment, the connecting member is disposed above the reinforcing unit.

[0023] In one embodiment, a collecting device for collecting electrical signals is also provided on the support member to determine whether the support body touches the conduction bundle in the heart.

[0024] In one embodiment, it also includes a recovery device arranged outside the delivery tube, the recovery device includes an external tube and an internal tube, the internal tube is arranged at the distal end of the external tube; and the two are movably connected, and the internal tube can rotate relative to the external tube.

[0025] In one embodiment, the external tube further includes an annular wrapping piece, which is cooperatively connected with the groove of the internal tube, and the internal tube can only rotate relative to the external tube but cannot move axially relative to the external tube.

[0026] In one embodiment, the proximal end of the support body is fixedly connected to the proximal end of the delivery tube, and when the delivery tube is pulled, the support body enters the inner tube along with the delivery tube, and then the external tube is kept stationary, and the delivery tube is rotated, and the inner tube and the support body also rotate accordingly; and, when the delivery tube is pushed toward the distal end, the support body returns to the left ventricle again, and at this time the position of the tissue that can be ablated by the ablation assembly has been changed.

[0027] In one embodiment, the two ablation needles move axially together or individually; and when the fitting moves toward the distal end along with the ablation needle, the distal end of the ablation needle pierces the target tissue, and the fitting moves to fit the target tissue without entering.

[0028] In one embodiment, the ablation needles move together before entering the lesion tissue, and after entering the tissue, the ablation needles are pushed separately to form an ablation range that adapts to the patient's lesion.

[0029] In one embodiment, the distal end of the ablation segment acts on ventricular septal tissue within the heart.

[0030] In one embodiment, the surface of the ablation segment is coated with a developing material.

[0031] Compared with the prior art, the advantages of the present invention are: 1. In the prior art, before ablation of the ventricular septum, it is necessary to adapt to the shape of the aorta and then bend toward the ventricular septum, or pass through the foramen ovale and the mitral valve to reach the left ventricle. Therefore, at least two bends are required near the lesion. Therefore, except for the ablation segment at the distal end used for ablation, the other parts of the ablation needle need to bend to adapt to the blood vessels. Therefore, the puncture direction of the ablation segment is difficult to determine and fix, and the length of the ablation segment is limited, so it is difficult for the ablation segment to penetrate straight into the target tissue. The ablation device of the present application solves the above problems. First, a deformable support body is provided at the distal end of the delivery tube. The ablation assembly enters the left ventricle with the support body, and the ablation assembly is pre-installed in the channel tube. The connector of the channel tube is connected to the support member of the support body. The support member provides support force for the channel tube. While the support body and the channel tube remain stationary, the ablation component can stably move axially back and forth, that is, to perform puncture at the target position; on the other hand, due to the different shapes of the left ventricle of different patients, after the support body is deformed to fit the left ventricle, the connector at the distal end of the channel tube may not necessarily touch the ventricular septum tissue. In order to prevent the flexible segment from bending after being exposed and causing the two ablation needles to be unable to remain parallel, the present application designs an auxiliary directional structure, and the connector will form a movable connection with the matching component. Since the matching component is hard, after the matching component moves toward the distal end, the matching component is sleeved on the flexible segment to prevent the flexible segment from bending, and the matching component will rest against the surface of the ventricular septum, further providing support for the ablation segment. The design is ingenious and has great clinical significance.

[0032] 2. Different from the prior art, the three connection methods, namely, the ablation segment and the matching piece, the bendable segment and the matching piece, and the matching piece and the connecting piece, can all move relative to each other. The advantage of such a design is that after the support body is deformed to the target shape, the connecting piece may fit with the ventricular septum tissue, or may be at a certain distance from the ventricular septum tissue. When there is no need to fill the gap, the matching piece will not come out. When there is a need to fill the gap, the matching piece will be brought out by the bendable segment / ablation segment. Moreover, the matching piece will not affect the axial advancement or axial retreat of the ablation segment throughout the entire process.

[0033] 3. Different from the prior art, the ablation segment and the bendable segment are made of different materials, the friction of the bendable segment is greater than that of the ablation segment, and the bendable segment can more easily drive the matching piece to move. Therefore, when the ablation segment does not need the matching piece, the matching piece will not move translationally, and the matching piece will only move when needed.

[0034] 4. Different from the prior art, the support member includes an arc segment and a supporting segment, and the distal end of the channel tube is connected to the supporting segment, and the two are movably connected by a thin rope or a thin wire. The advantages of this design are: first, the arc segment can perfectly transition between the conveying tube and the supporting segment, so that the support body can be recovered smoothly; secondly, the structure of the supporting segment is more complex than that of the arc segment, and the supporting force it can provide is also stronger. The distal end of the channel tube is supported by the supporting segments on the left and right sides, so that when the channel tube bends, it can bend gradually and stably without being too flexible.

[0035] 5. Different from the prior art, the support body of the present application also includes a reinforcing unit arranged in the middle thereof. The reinforcing unit is the strongest part of the support body and can ensure that the support body is stuck in the left ventricle after being released, thereby ensuring the stability of the channel tube and the puncture of the ablation needle.

[0036] 6. Different from the prior art, the present application also provides a recovery device that changes the ablation area by recovering the support body, rotating the support body, and releasing the support body, so that after the ablation component completes ablation in one place, it can also perform ablation in other places.

[0037] The embodiments of the present application can achieve other advantageous technical effects that are not listed one by one. These other technical effects may be partially described below and are predictable and understandable to those skilled in the art after reading the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above-mentioned features and advantages and other features and advantages of these embodiments and the manner in which they are achieved will become more apparent, and the embodiments of the present application can be better understood by referring to the following description together with the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the ablation device of the present invention.

[0039] Figure 2 It is a cross-sectional schematic diagram of the ablation device of the present invention.

[0040] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0041] Figure 4 for Figure 2 Enlarged view of part B in the middle.

[0042] Figure 5 for Figure 2 Enlarged view of part C in the middle.

[0043] Figure 6 It is a schematic diagram of the auxiliary orientation structure of the present invention.

[0044] Figure 7 Schematic diagram of auxiliary directional structure work Figure 1 .

[0045] Figure 8 Schematic diagram of auxiliary directional structure work Figure 2 .

[0046] Fig. 9 Schematic diagram of auxiliary directional structure work Figure 3 .

[0047] Fig.10 Schematic diagram of the support body being recycled to the recycling device Figure 1 .

[0048] Fig.11 Schematic diagram of the support body being recycled to the recycling device Figure 2 .

[0049] Fig.12 Schematic diagram of the support body being recovered to the recovery device.

[0050] Fig.13 The working process of the ablation device of the present invention is shown in FIG. Figure 1 .

[0051] Fig.14 The working process of the ablation device of the present invention is shown in FIG. Figure 2 .

[0052] Fig.15 The working process of the ablation device of the present invention is shown in FIG. Figure 3 .

[0053] Fig.16 The working process of the ablation device of the present invention is shown in FIG. Figure 4 .

[0054] Fig.17 The working process of the ablation device of the present invention is shown in FIG. Figure 5 .

[0055] Fig.18 The working process of the ablation device of the present invention is shown in FIG. Figure 6 .

[0056] The names of the parts indicated by the numbers in the accompanying drawings are as follows: 1-delivery tube, 2-support body, 21-support member, 211-arc segment, 212-rest segment, 22-enhancement unit, 3-channel tube, 4-ablation assembly, 41-ablation needle, 411-ablation segment, 412-bendable segment, 5-auxiliary directional structure, 51-connecting member, 52-matching member, 521-double-track channel, 522-slide block, 6-control member, 7-recovery device, 71-external tube, 711-annular wrapping member, 72-internal tube, 721-groove. DETAILED DESCRIPTION

[0057] In the following description of the drawings and specific embodiments, the details of one or more embodiments of the present application will be described. From these descriptions, drawings and claims, other features, purposes and advantages of the present application can be clearly seen.

[0058] It should be understood that the illustrated and described embodiments are not limited in application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the accompanying drawings. The illustrated embodiments may be other embodiments and may be implemented or executed in various ways. Each example is provided by explaining the disclosed embodiments rather than limiting them. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the embodiments of the present application without departing from the scope or essence disclosed in the present application. For example, a feature illustrated or described as part of an embodiment may be used together with another embodiment to still produce another embodiment. Therefore, the present application discloses and covers such modifications and variations within the scope of the appended claims and their equivalent elements.

[0059] Likewise, it is understood that the phrases and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "include," "comprise," or "have" and variations thereof herein is intended to be open-ended to include the items listed thereafter and their equivalents and additional items.

[0060] The present application will be described in more detail below with reference to different embodiments and examples of several aspects of the present application.

[0061] In the present application, the term “proximal end” or “proximal side” refers to an end or a side closer to a surgical operator, and the term “distal end” or “distal side” refers to an end or a side farther from a surgical operator.

[0062] Embodiment 1

[0063] like Figure 1 and Figure 2 As shown, an ablation device is shown, including a delivery tube 1, a support body 2, a channel tube 3 and an ablation component 4, wherein the distal end of the delivery tube 1 is connected to the support body 2, the support body 2 includes a plurality of support members 21, the channel tube 3 is sleeved in the delivery tube 1, the channel tube 3 is connected to the support member 21, and the ablation component 4 is arranged in the channel tube 3; and, further comprising an auxiliary orientation structure 5, the auxiliary orientation structure 5 includes a connecting member 51 arranged at the distal end of the channel tube 3 and a matching member 52 that forms an active connection with the connecting member 51, and the matching member 52 is sleeved outside the ablation component 4, as shown in FIG. Figure 5 As shown, the ablation component 4 drives the matching piece 52 so that the matching piece 52 moves relative to the connecting piece 51 .

[0064] The composition and connection mode of each component in this embodiment will be described in detail below with reference to the accompanying drawings: In this embodiment, the ablation assembly 4 includes at least two ablation needles 41 arranged side by side, and the ablation needle 41 includes an ablation segment 411 and a bendable segment 412. The ablation segment 411 is arranged at the farthest end of the ablation needle 41. Figure 5 As shown; and, when pre-installed, the ablation segment 411 is sleeved in the matching member 52, and the matching member 52 does not exceed the connecting member 51, such as Figure 7 shown.

[0065] In this embodiment, the ablation segment 411 and the matching piece 52 are successively exposed from the connecting piece 51, the ablation segment 411 is inserted into the lesion tissue, and the matching piece 52 is in contact with the lesion tissue; moreover, the ablation segment 411 and the bendable segment 412 are made of different materials, the friction force of the bendable segment 412 is greater than the friction force of the ablation segment 411, and the bendable segment 412 can more easily drive the matching piece 52 to move.

[0066] In this embodiment, the ablation section 411 is made of metal material, and the bendable section 412 is made of polymer material.

[0067] In this embodiment, the ablation segment 411 is completely exposed outside the connecting member 51, and the ablation segment 411 has not yet contacted the target tissue. The ablation segment 411 continues to move toward the distal end until the bendable segment 412 contacts the matching member 52. Figure 8 As shown, when the bendable section 412 moves toward the distal end, it drives the matching piece 52 to move toward the distal end, so that the ablation section 411 can still maintain the original straight path and pierce the tissue. Fig. 9 shown.

[0068] In this embodiment, the matching member 52 includes a double-track channel 521 and a sliding block 522, the connecting member 51 includes a limiting track, and the sliding block 522 slides in the limiting track. Figure 6 As shown; and, the double-track channel 521 is connected with the ablation component 4 in a clearance fit, and the ablation component 4 drives the matching piece 52 to move through friction.

[0069] In this embodiment, the sliding blocks 522 are located on both sides of the double-track channel 521 relative to the double-track channel 521 .

[0070] In this embodiment, a control member 6 connected to the distal end of the support body 2 is also included. The support body 2 is rugby-shaped in its natural state. Fig.10 As shown, by pulling the control member 6, the support body 2 becomes a pumpkin shape, as shown in FIG. Fig.11 As shown; pulling the control member 6, the support body 2 changes from a slender shape to a round and thick shape.

[0071] In this embodiment, the support member 21 is Y-shaped, V-shaped or straight-line shaped; and the support body 2 also includes a reinforcing unit 22 arranged in the middle thereof, the diameter of the reinforcing unit 22 is the maximum diameter of the support body 2, and the support member 21 is connected to the reinforcing unit 22.

[0072] In this embodiment, the support member 21 includes an arc segment 211 and abutting segment 212, and the distal end of the channel tube 3 is connected to the abutting segment 212, and the two are movably connected by a thin rope or a thin wire; and in a natural state, the connecting member 51 at least partially exceeds the outer peripheral surface of the abutting segment 212, such as Figure 1 and 2 shown.

[0073] In this embodiment, the left and right sides of the distal end of the channel tube 3 are respectively connected to the abutting section 212 , and the abutting section 212 provides a supporting force for the channel tube 3 to bend.

[0074] In this embodiment, the channel tube 3 is bent in the support body 2, and the channel tube 3 is J-shaped.

[0075] In this embodiment, the connecting member 51 is disposed below the reinforcing unit 22 .

[0076] In this embodiment, a collecting device for collecting electrical signals is also provided on the support member 21 to determine whether the support member 2 hits the conduction bundle in the heart.

[0077] In this embodiment, a recovery device 7 is further provided outside the delivery pipe 1. The recovery device 7 includes an external pipe 71 and an internal pipe 72. The internal pipe 72 is provided at the distal end of the external pipe 71. The internal pipe 72 is movably connected to the external pipe 71. The internal pipe 72 can rotate relative to the external pipe 71. Figure 2 and Figure 3 shown.

[0078] In this embodiment, the external tube 71 further includes an annular wrapping member 711, and the annular wrapping member 711 is cooperatively connected with the groove 721 of the internal tube 72. The internal tube 72 can only rotate relative to the external tube 71, and cannot move axially relative to the external tube 71. Figure 3 shown.

[0079] In this embodiment, the proximal end of the support body 2 is fixedly connected to the proximal end of the delivery tube 1. Figure 4 As shown, the delivery pipe 1 is pulled, and the support body 2 enters the inner pipe 72 along with the delivery pipe 1. Fig.12 As shown, the external tube 71 is then kept stationary, the delivery tube 1 is rotated, and the internal tube 72 and the support body 2 are also rotated accordingly; and the delivery tube 1 is pushed to move toward the distal end, the support body 2 returns to the left ventricle again, and at this time the position of the tissue that can be ablated by the ablation component 4 has been changed.

[0080] In this embodiment, the two ablation needles 41 perform axial movement together or individually; and when the matching piece 52 moves toward the distal end along with the ablation needle 41, the distal end of the ablation needle 41 will penetrate the target tissue, and the matching piece 52 moves to fit the target tissue without entering.

[0081] In this embodiment, the ablation needles 41 move together before entering the lesion tissue, and after entering the tissue, the ablation needles 41 are pushed out separately to form an ablation range that adapts to the patient's lesion.

[0082] The working process steps of the present invention are as follows: (1) The ablation device enters the right atrium through the femoral vein and passes through the foramen ovale, then enters the left atrium, and enters the left ventricle after being adjusted in curvature. Fig.13 As shown; (2) withdrawing the recovery device 7 to expose the support body 2 and the delivery pipe 1, as shown in FIG. Fig.14 As shown; (3) Adjust the control member 6 to deform the support body 2 and adjust the position of the support body 2 until the support body 2 is at the target position. At this time, the enhancement unit 22 fits with the left ventricle, as shown in FIG. Fig.15 (4) pushing the channel tube 3, the channel tube 3 is bent, and the ablation needle 41 is determined in the direction of the needle, as shown in FIG. Fig.16 As shown; (5) The ablation needle 41 is pushed, and the ablation segment 411 and the matching piece 52 come out from the interior of the connecting piece 51 successively. The ablation segment 411 is inserted into the interventricular septal tissue, and the matching piece 52 is closely attached to the interventricular septal tissue. Fig.17 As shown; (6) pushing the ablation needles 41 respectively, adjusting the distance between the two ablation segments 411 to form an ablation range, and performing ablation; (7) The ablation needle 41 is withdrawn, the ablation segment 411 and the matching member 52 are retracted into the connecting member 51, and the retrieving device 7 is operated to retract the support body 2. Fig.18 As shown; (8) Rotate the delivery tube 1, then release the support body 2, repeat step (2), until the ablation work is completed, and recycle the ablation device.

[0083] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. An ablation device, comprising a delivery tube, a support body, a channel tube and an ablation component, characterized in that: The distal end of the delivery tube is connected to the support body, the support body includes a plurality of support members, the channel tube is sleeved in the delivery tube, the channel tube is connected to the support members, and the ablation assembly is arranged in the channel tube; and further includes an auxiliary orientation structure, the auxiliary orientation structure includes a connecting member arranged at the distal end of the channel tube and a matching member that forms a movable connection with the connecting member, the matching member is sleeved outside the ablation assembly, and the ablation assembly drives the matching member so that the matching member moves relative to the connecting member.

2. The ablation device according to claim 1, characterized in that: The ablation assembly comprises at least two ablation needles arranged side by side, wherein the ablation needle comprises an ablation section and a bendable section, wherein the ablation section is arranged at the farthest end of the ablation needle; and when pre-installed, the ablation section is sleeved in the matching piece, and the matching piece does not extend beyond the connecting piece.

3. The ablation device according to claim 2, characterized in that: The ablation segment and the matching piece are exposed from the connecting piece in sequence, the ablation segment penetrates into the lesion tissue, and the matching piece contacts the lesion tissue; moreover, the ablation segment and the bendable segment are made of different materials, the friction force of the bendable segment is greater than that of the ablation segment, and the bendable segment can more easily drive the matching piece to move.

4. The ablation device according to claim 1, characterized in that: The matching piece includes a double-track channel and a sliding block, the connecting piece includes a limiting track, and the sliding block slides in the limiting track; and the double-track channel is loosely connected to the ablation component, and the ablation component drives the matching piece to move through friction.

5. The ablation device according to claim 1, characterized in that: It also includes a control member connected to the distal end of the support body. The support body is in a rugby shape in a natural state, and the support body is in a pumpkin shape when the control member is pulled.

6. The ablation device according to claim 1, characterized in that: The support member is Y-shaped, V-shaped or straight-shaped; and the support body also includes a reinforcing unit arranged in the middle thereof, the diameter of the reinforcing unit is the maximum diameter of the support body, and the support member is connected to the reinforcing unit.

7. The ablation device according to claim 1, characterized in that: The support member includes an arc segment and a supporting segment, the distal end of the channel tube is connected to the supporting segment, and the two are movably connected via a thin rope or a thin wire; and, in a natural state, the connecting member at least partially extends beyond the outer peripheral surface of the supporting segment.

8. The ablation device according to claim 6, characterized in that: The enhancement unit and / or the support member is also provided with a collection device for collecting electrical signals.

9. The ablation device according to claim 1, characterized in that: It also includes a recovery device arranged outside the delivery pipe, the recovery device includes an external pipe and an internal pipe, the internal pipe is arranged at the far end of the external pipe; and the two are movably connected, and the internal pipe can rotate relative to the external pipe.

10. The ablation device according to claim 9, characterized in that: The proximal end of the support body is fixedly connected to the proximal end of the delivery tube. When the delivery tube is pulled, the support body enters the inner tube along with the delivery tube. Then, the outer tube is kept stationary and the delivery tube is rotated, and the inner tube and the support body also rotate accordingly.

11. The ablation device according to claim 2, characterized in that: The two ablation needles move axially together or individually; and when the matching piece moves toward the distal end along with the ablation needle, the distal end of the ablation needle will pierce the target tissue, and the matching piece moves to fit the target tissue without entering.

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