Ablation device and radiofrequency ablation apparatus

Abstract

The application provides an ablation device and a radio frequency ablation equipment, the ablation device comprises a first electrode assembly with a first electrode tip, the first electrode tip comprises a first protective sheath and a plurality of first electrodes arranged on the first protective sheath; and the first protective sheath is in a strip shape, and the plurality of first electrodes are arranged at intervals along the extension direction of the first protective sheath; that is, the plurality of first electrodes simultaneously act on the corresponding tissues to form an integral ablation line, so that a good ablation effect is realized, and the ablation efficiency is improved; it can be seen that the ablation device can solve the problem of the unsatisfactory ablation effect of the ablation device in the prior art.

Description

Technical Field

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

[0002] Ablation is a common measure for treating atrial fibrillation. Its principle is to create one or more ablation lines in the heart tissue, causing tissue necrosis and cutting off abnormal electrical signal conduction for the treatment of atrial fibrillation.

[0003] Current ablation treatments are divided into surgical ablation and internal medicine interventional ablation. The characteristics of surgical ablation are excellent efficacy and low postoperative recurrence rate, but its obvious disadvantage is greater trauma and slow postoperative recovery. Internal medicine interventional ablation is favored by more and more patients because of its low trauma and quick recovery. However, internal medicine ablation is a point-like ablation, and its biggest disadvantage is that it is difficult to form a complete ablation line; and the ablation is unilateral and adheres to the wall, with a limited ablation depth, making it difficult to ensure complete dehydration and denaturation of the tissue from the inside out. If the ablation power is low during surgery, the ablation will not be thorough, while if the power is high, it is difficult to control, and there are cases of excessive tissue necrosis or even burn-through and leaking. Therefore, the success rate of internal medicine interventional ablation is much lower than that of surgery. Summary of the Invention

[0004] The main purpose of the present invention is to provide an ablation device and a radiofrequency ablation equipment to solve the problems of large surgical ablation trauma, slow postoperative recovery, limited angle of use, and inconvenient operation; to solve the problem that the current internal medicine interventional ablation energy is constant and the output power cannot be adjusted in time according to the ablation effect, resulting in overburning or non-penetrating the wall; to solve the problem that the current internal and external surgical ablation equipment requires additional equipment for mapping after ablation, which is cumbersome to operate.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an ablation device is provided, which includes: a first electrode assembly, the first electrode assembly includes a first electrode end, the first electrode end includes a first protective sheath and a plurality of first electrodes arranged on the first protective sheath; wherein, the first protective sheath is strip-shaped, and the plurality of first electrodes are arranged at intervals along the extension direction of the first protective sheath.

[0006] Furthermore, the first protective sheath is made of a flexible material and can be rotated at any angle, thus solving the problem of angle limitations of current surgical ablation instrument products.

[0007] Furthermore, the first electrode tip further includes a positioning member, which is provided on the first protective sheath, and the first electrode tip is positioned on the epicardium through the positioning member.

[0008] Further, the positioning member is a gas bag structure, and the positioning member is arranged on the outer wall of the first protective sheath; or, when the positioning member is in the contracted state, the positioning member is located on the inner side of the first protective sheath, and when the positioning member is in the expanded state, at least part of the positioning member extends from the inner side of the first protective sheath to the outer side of the first protective sheath.

[0009] Further, the positioning member is a plurality of positioning members, and the plurality of positioning members are arranged at intervals along the extension direction of the first protective sheath and are independently controlled.

[0010] Further, the positioning member is in a strip shape, a square shape, or a circular shape, and the positioning member extends along the extension direction of the first protective sheath.

[0011] Further, the ablation device further comprises a second electrode assembly, the second electrode assembly comprises a second electrode tip, the second electrode tip comprises a plurality of second electrodes, and the plurality of second electrodes are arranged at intervals along the extension direction of the second electrode tip; wherein the plurality of first electrodes and the plurality of second electrodes are arranged in cooperation with each other, the second electrode tip is arranged on the endocardium, and the first electrode and the second electrode are used to ablate the tissue to be ablated located between the first electrode and the second electrode.

[0012] Further, the ablation device further comprises an ablation circuit, and the first electrode and the second electrode are arranged on the ablation circuit, so as to adjust the radio frequency energy between the first electrode and the second electrode by testing the impedance between each first electrode and the corresponding second electrode to perform ablation.

[0013] Further, the first electrode tip comprises a first magnetic member, the second electrode tip comprises a second magnetic member, and the first magnetic member and the second magnetic member cooperate to relatively fix the first electrode tip and the second electrode tip.

[0014] Further, the first magnetic member and the second magnetic member are each a plurality of magnetic members, the first electrode tip and the second electrode tip are each in a strip shape, the plurality of first magnetic members are arranged at intervals along the extension direction of the first electrode tip, and the plurality of second magnetic members are arranged at intervals along the extension direction of the second electrode tip.

[0015] Further, the plurality of first magnetic members and the plurality of first electrodes are arranged at intervals alternately, and the plurality of second magnetic members and the plurality of second electrodes are arranged at intervals alternately.

[0016] Further, the adjacent first electrode and the first magnetic member are arranged in insulation, and the adjacent second electrode and the second magnetic member are arranged in insulation.

[0017] Further, the opposite surfaces between the adjacent first electrode and the first magnetic member are each sprayed with insulating paint, or the adjacent first electrode and the first magnetic member are provided with an insulating partition plate; and the opposite surfaces between the adjacent second electrode and the second magnetic member are each sprayed with insulating paint, or the adjacent second electrode and the second magnetic member are provided with an insulating partition plate.

[0018] Furthermore, outer surfaces of the first magnetic component and the second magnetic component are both covered with an insulating layer.

[0019] Furthermore, the ablation device includes a first electrode circuit, a first magnetic circuit, a second electrode circuit, and a second magnetic circuit. The first electrode circuit is connected to the first electrode, the first magnetic circuit is connected to the first magnetic component, the second electrode circuit is connected to the second electrode, and the second magnetic circuit is connected to the second magnetic component.

[0020] Furthermore, the energized circuits of the two first electrodes are independently provided to form a mapping electrode pair, so as to utilize the energized circuits to detect the electrical signal transmission status of the tissue to be ablated after ablation.

[0021] Furthermore, the power-carrying circuits of the two second electrodes are independently set to form a mapping electrode pair, so as to use the power-carrying circuits to detect the electrical signal transmission status of the tissue to be ablated after ablation; and / or, the power-carrying circuits of the first electrode and the second electrode are independently set to form a mapping electrode pair, so as to use the power-carrying circuits to detect the electrical signal transmission status of the tissue to be ablated after ablation.

[0022] Furthermore, there are multiple first electrode tips and multiple second electrode tips.

[0023] Furthermore, shielding side ridges are provided on opposite sides of the first protective sheath.

[0024] Furthermore, the plurality of first electrodes included in the first electrode terminal are insulated from each other.

[0025] Furthermore, the power supply circuits of the plurality of first electrodes are independently provided to individually control each first electrode.

[0026] Furthermore, two adjacent first electrodes of the same first electrode tip form an electrode pair, and the two electrode pairs arranged at intervals cooperate with each other to test the electrical signal transmission of the tissue between the two electrode pairs.

[0027] Furthermore, two adjacent first electrodes in different first electrode tips form an electrode pair, and the polarities of the two first electrodes in the electrode pair are opposite to each other, so as to detect electrical signal transmission in tissue between the two first electrodes of the electrode pair.

[0028] Furthermore, the first electrode has an electrode surface disposed toward the tissue to be ablated, and the first protective sheath has a protective sheath surface disposed toward the tissue to be ablated; wherein the electrode surface is located on a side of the protective sheath surface close to the tissue to be ablated.

[0029] Furthermore, there are multiple first electrodes, and the multiple first electrodes are arranged at intervals along the extension direction of the first electrode tip; and the minimum distances between the electrode surfaces of the multiple first electrodes and the protective sheath surface are all the same.

[0030] Furthermore, both the electrode surface and the protective sheath surface are planes.

[0031] Furthermore, there are multiple first electrodes, and the multiple first electrodes are arranged at intervals along the extension direction of the first electrode end; at least one of the multiple first electrodes is provided with a cooling hole for circulating a cooling fluid; and / or, a cooling pipe for circulating a cooling fluid is provided in the first protective sheath.

[0032] Furthermore, at least one of the plurality of first electrodes is provided with 1 to 4 cooling holes.

[0033] Furthermore, the second electrode tip includes a second protective sheath, and the second electrode is arranged on the second protective sheath; the second electrode is made of a metal developing material, and the metal developing material includes at least one of the following materials: platinum, platinum-iron alloy, tantalum, gold-plated beryllium bronze; and / or, the second protective sheath is made of a developing material, and the components of the developing material include barium sulfate.

[0034] Furthermore, the second electrodes are spaced apart along the extension direction of the second protective sheath, the second electrodes are sheathed on the second protective sheath, and the electrode surface of the second electrodes is located outside the surface of the second protective sheath. According to another aspect of the present invention, a radiofrequency ablation device is provided, which includes a radiofrequency mainframe and the above-mentioned ablation device, wherein the ablation device is connected to the radiofrequency mainframe.

[0035] Applying the technical solution of the present invention, the ablation device includes a first electrode assembly having a first electrode tip and a second electrode assembly having a second electrode tip. The first electrode assembly and the second electrode assembly can be used independently. The first electrode tip includes a first protective sheath and a plurality of first electrodes disposed within the first protective sheath. The first protective sheath is strip-shaped, and the plurality of first electrodes are spaced apart along the extension direction of the first protective sheath. This allows the plurality of first electrodes to simultaneously act on the epicardial tissue, forming a complete ablation line.

[0036] The first electrode and the second electrode of the ablation device are arranged relative to each other so as to ablate the tissue to be ablated between the first electrode and the second electrode through the first electrode and the second electrode. In specific use, the first electrode assembly and the second electrode assembly are used as the epicardial electrode and the endocardial electrode respectively, so that the first electrode assembly and the second electrode assembly act on the epicardium and the endocardium respectively, so as to achieve simultaneous ablation of the epicardium and the endocardium, thereby solving the problem that although cardiac surgery is a dynamic ablation, surgical ablation is relatively traumatic and the postoperative recovery is slow, and solving the problem that the energy of interventional ablation in internal medicine is constant and the output power cannot be adjusted in time according to the ablation effect, resulting in overburning or non-penetrating the wall; thereby achieving a good ablation effect and improving ablation efficiency; it can be seen that the use of this ablation device can solve the problem of unsatisfactory ablation effect of ablation devices in the prior art.

[0037] Whether performing endocardial ablation, epicardial ablation, or simultaneous endocardial and epicardial ablation, a single electrode assembly or coordinated electrode assemblies can perform timely mapping and monitor the ablation effect, solving the current problem that post-ablation mapping still requires the use of external instruments and is point-based mapping, thereby improving the surgical ablation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 A schematic structural diagram showing a first embodiment of a first electrode assembly of an optional ablation device according to the present invention in one state;

[0040] Figure 2 A schematic structural diagram showing a first embodiment of another state of a first electrode assembly of an optional ablation device according to the present invention;

[0041] Figure 3 A schematic structural diagram of a second embodiment of a first electrode assembly of an optional ablation device according to the present invention is shown;

[0042] Figure 4 Shown Figure 1 A schematic structural diagram of a first electrode tip of a first electrode assembly of an ablation device;

[0043] Figure 5 Shown Figure 1 A schematic structural diagram of a positioning member of a first electrode assembly of an ablation device;

[0044] Figure 6 Shown Figure 1 A cross-sectional view of a first electrode tip of a first electrode assembly of an ablation device;

[0045] Figure 7 Shown Figure 1 A structural diagram of a first electrode assembly of an ablation device in which the positioning member is a suction cup;

[0046] Figure 8 A schematic structural diagram of a second electrode assembly of an optional ablation device according to the present invention is shown;

[0047] Figure 9 Shown Figure 8 A partial enlarged view of the second electrode assembly of the ablation device;

[0048] Figure 10 Shown Figure 9 An enlarged view of part A of the second electrode assembly of the ablation device;

[0049] Figure 11 A schematic structural diagram of a radio frequency host of an optional radio frequency ablation device according to the present invention is shown;

[0050] Figure 12 It shows an assembly diagram between a radio frequency main unit and an ablation device of an optional radio frequency ablation device according to the present invention;

[0051] Figure 13 A schematic diagram showing the principle of the ablation device of the present invention when ablating tissue to be ablated;

[0052] Figure 14 A diagram showing the coordination between the first electrode and the second electrode of the ablation device of the present invention and the tissue to be ablated according to an embodiment of the present invention is shown;

[0053] Figure 15 An ablation principle diagram showing one state of the ablation device of the present invention;

[0054] Figure 16 A diagram showing the ablation principle of the ablation device of the present invention in another state;

[0055] Figure 17 A schematic diagram showing the wiring between the radio frequency main unit and the first electrode assembly and the second electrode assembly of the radio frequency ablation device of the present invention is shown;

[0056] Figure 18 A schematic structural diagram of a second embodiment of the first electrode assembly of the ablation device of the present invention is shown;

[0057] Figure 19 A schematic structural diagram of a second embodiment of a second electrode assembly of an ablation device according to the present invention is shown;

[0058] Figure 20 A diagram showing another embodiment of the coordination between the first electrode and the second electrode of the ablation device of the present invention and the tissue to be ablated is shown.

[0059] The above drawings include the following reference numerals:

[0060] 100. A first electrode assembly;

[0061] 110, first electrode tip; 111, first electrode; 1110, electrode surface; 1112, cooling hole; 112, first magnetic member; 113, first protective sheath; 114, positioning member; 1130, protective sheath surface; 115, shielding side eaves;

[0062] 120. Wire laying trough;

[0063] 200. Second electrode assembly;

[0064] 210, second electrode tip; 211, second electrode; 212, second magnetic member; 213, developing member; 214, second protective sheath; 260, control handle;

[0065] 310. RF host; 311. Ablation interface; 312. Electromagnetic interface; 313. Display screen; 320. Ablation circuit; 330. Ablation range; 340. Tissue to be ablated. DETAILED DESCRIPTION

[0066] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0067] The present invention provides an ablation device, please refer to Figures 1 to 20 The ablation device includes a first electrode assembly 100, the first electrode assembly 100 includes a first electrode tip 110, the first electrode tip 110 includes a first protective sheath 113 and a plurality of first electrodes 111 arranged on the first protective sheath 113; wherein, the first protective sheath 113 is strip-shaped, and the plurality of first electrodes 111 are arranged at intervals along the extension direction of the first protective sheath 113.

[0068] In the ablation device of the present invention, the ablation device includes a first electrode assembly 100 having a first electrode tip 110, the first electrode tip 110 includes a first protective sheath 113 and a plurality of first electrodes 111 arranged on the first protective sheath 113; and, the first protective sheath 113 is strip-shaped, and the plurality of first electrodes 111 are arranged at intervals along the extension direction of the first protective sheath 113; that is, the plurality of first electrodes 111 act on the corresponding tissues at the same time to form a complete ablation line, thereby achieving a good ablation effect and improving the ablation efficiency; it can be seen that the use of this ablation device can solve the problem of unsatisfactory ablation effect of the internal medicine interventional ablation device in the prior art.

[0069] In addition, arranging the plurality of first electrodes 111 at intervals can avoid mutual influence between two adjacent first electrodes 111 .

[0070] In this embodiment, the number of first electrodes 111 is 2 to 10.

[0071] Optionally, the first protective sheath 113 is tubular, and the plurality of first electrodes 111 are all disposed in the lumen of the first protective sheath 113 .

[0072] In some embodiments, the first protective sheath 113 is made of a flexible material, and the first protective sheath 113 can swing in the X, Y, and Z directions.

[0073] In this embodiment, the first electrode tip 110 further includes a positioning member 114 . The positioning member 114 is disposed on the first protective sheath 113 . The first electrode tip 110 is positioned on the epicardium via the positioning member 114 .

[0074] Optionally, there are multiple positioning members 114 , which are spaced apart along the extension direction of the first protective sheath 113 , so that the first electrode tip 110 is stably positioned on the epicardium, thereby ensuring the positioning effect of the first electrode tip 110 .

[0075] Specifically, the positioning member 114 is an airbag structure.

[0076] In this embodiment, one arrangement of the positioning member 114 is as follows: Figure 3 As shown, the positioning member 114 is arranged on the outer wall of the first protective sheath 113; in the specific implementation process, air is inflated into the airbag structure to make it expand, so that the airbag structure forms an extrusion effect on the first protective sheath 113, and under this extrusion effect, the first protective sheath 113 is fitted with the corresponding ablated tissue, thereby enabling the first electrode 111 in the first protective sheath 113 to act on the corresponding ablated tissue.

[0077] Specifically, a receiving groove is provided on the outer wall of the first protective sheath 113. When the airbag structure is in a deflated state, the airbag structure is accommodated in the receiving groove. When the airbag structure is in an expanded state, at least a portion of the airbag structure is released from the receiving groove, exerting a pressure on the first protective sheath 113. If there are multiple positioning members 114, multiple receiving grooves are provided on the outer wall of the first protective sheath 113, and the multiple receiving grooves are spaced apart along the extension direction of the first protective sheath 113. In this embodiment, the positioning members in the form of multiple airbag structures each have an independent ventilation path, which can independently control the operating state of each airbag structure.

[0078] In this embodiment, if Figure 4 As shown, another arrangement of the positioning member 114 is: when the positioning member 114 is in a contracted state, the positioning member 114 is located on the inner side of the first protective sheath 113; when the positioning member 114 is in an expanded state, at least a portion of the positioning member 114 extends from the inner side of the first protective sheath 113 to the outer side of the first protective sheath 113, so as to form an extrusion effect on the first protective sheath 113 when the airbag structure expands.

[0079] Specifically, the positioning piece 114 is in a strip shape, a square shape, or a circle shape, and extends along the extending direction of the first protective sheath 113 .

[0080] In this embodiment, the ablation device also includes a second electrode assembly 200, the second electrode assembly 200 includes a second electrode tip 210, the second electrode tip 210 includes a plurality of second electrodes 211, and the plurality of second electrodes 211 are arranged at intervals along the extension direction of the second electrode tip 210; wherein, the plurality of first electrodes 111 and the plurality of second electrodes 211 are arranged in cooperation with each other, and the second electrode tip 210 is arranged on the endocardium to ablate the tissue to be ablated between the first electrode 111 and the second electrode 211 through the first electrode 111 and the second electrode 211.

[0081] Specifically, the ablation device also includes an ablation circuit 320, and the first electrode 111 and the second electrode 211 are both arranged on the ablation circuit 320 to perform ablation by adjusting the radio frequency energy between the first electrode 111 and the second electrode 211 by testing the impedance between each first electrode 111 and the corresponding second electrode 211.

[0082] In specific use, the first electrode assembly 100 is used as an epicardial electrode, so that the first electrode assembly 100 and the second electrode assembly 200 act on the epicardium and endocardium respectively, so as to achieve simultaneous ablation of the epicardium and endocardium, thereby achieving a good ablation effect. In addition, the ablation device in this application can achieve hybrid internal and external ablation. This technology is less invasive and solves the problem of large trauma and slow recovery of surgical ablation in the existing technology. At the same time, it can simultaneously ablate the epicardium and endocardium. The output power is adjusted by measuring the actual impedance between the tissues. It is accurate and safe. When the impedance reaches a certain resistance value, the machine alarm indicates that the ablation is complete, avoiding excessive ablation.

[0083] In addition, by arranging each first electrode 111 and the corresponding second electrode 211 relative to each other, the impedance between each first electrode 111 and the corresponding second electrode 211 can be tested in real time, and the radio frequency energy between each first electrode 111 and the corresponding second electrode 211 can be adjusted according to the impedance between each first electrode 111 and the corresponding second electrode 211 detected in real time to perform ablation, and after the impedance reaches a certain resistance value, the machine alarms that the ablation is completed, avoiding excessive ablation, so as to solve the problem of limited unilateral ablation depth of interventional ablation in the prior art and difficulty in ensuring complete dehydration and denaturation of tissue from the inside to the outside, and at the same time solves the problem of difficult control of radio frequency power, that low power will cause incomplete ablation, and that excessive power will cause excessive ablation, tissue necrosis, or even burn-through and burn-leakage.

[0084] During the specific ablation process, the impedance of the ablated tissue between the electrodes changes from low to high; in the first stage of ablation, the impedance of the ablated tissue between the electrodes gradually increases, and the radio frequency power remains unchanged to accelerate the vibration of molecules in the cells; in the second stage of ablation, as the impedance of the ablated tissue between the electrodes increases, the radio frequency power gradually increases. When the impedance of the ablated tissue between the electrodes increases to its first preset value, the radio frequency power also increases to its preset maximum value. In this ablation stage, the cells are rapidly dehydrated to produce irreversible changes; in the third stage of ablation, as the impedance of the ablated tissue between the electrodes continues to increase, the radio frequency power gradually decreases to ensure the thoroughness of the ablation while preventing scabs on the tissue surface or damage to the patient due to high radio frequency power output; until the impedance of the ablated tissue between the electrodes increases to its second preset value, the ablation is terminated.

[0085] In this embodiment, the first electrode terminal 110 includes a first magnetic part 112, and the second electrode terminal 210 includes a second magnetic part 212. The first magnetic part 112 and the second magnetic part 212 cooperate to relatively fix the first electrode terminal 110 and the second electrode terminal 210, so that each first electrode 111 of the first electrode terminal 110 can be arranged relative to the corresponding second electrode 211 of the second electrode terminal 210.

[0086] Specifically, if Figure 2 and Figure 7 As shown, there are multiple first magnetic members 112 and multiple second magnetic members 212, and the first electrode terminal 110 and the second electrode terminal 210 are both bar-shaped. Multiple first magnetic members 112 are arranged at intervals along the extension direction of the first electrode terminal 110, and multiple second magnetic members 212 are arranged at intervals along the extension direction of the second electrode terminal 210 to ensure the overall fixing effect between the first electrode terminal 110 and the second electrode terminal 210.

[0087] In some embodiments, the plurality of first magnetic members 112 and the plurality of first electrodes 111 are arranged in a staggered manner, and the plurality of second magnetic members 212 and the plurality of second electrodes 211 are arranged in a staggered manner.

[0088] In some embodiments, adjacent first electrodes 111 and first magnetic members 112 are insulated from each other, and adjacent second electrodes 211 and second magnetic members 212 are insulated from each other.

[0089] In some embodiments, the opposing surfaces of adjacent first electrodes 111 and first magnetic members 112 are sprayed with insulating paint, or an insulating separator is provided between adjacent first electrodes 111 and first magnetic members 112; the opposing surfaces of adjacent second electrodes 211 and second magnetic members 212 are sprayed with insulating paint, or an insulating separator is provided between adjacent second electrodes 211 and second magnetic members 212. The insulating separator is designed to be integrated with the protective sheath or fixed separately.

[0090] In some embodiments, outer surfaces of the first magnetic member 112 and the second magnetic member 212 are both covered with an insulating layer.

[0091] In some embodiments, the ablation device includes a first electrode circuit, a first magnetic circuit, a second electrode circuit, and a second magnetic circuit. The first electrode circuit is connected to the first electrode 111, the first magnetic circuit is connected to the first magnetic member 112, the second electrode circuit is connected to the second electrode 211, and the second magnetic circuit is connected to the second magnetic member 212. The multiple first electrodes, second electrodes, first magnetic members, and second magnetic members can operate independently, thereby adjusting the magnetism and the number of ablation electrodes.

[0092] In some embodiments, the energized circuits of the two first electrodes 111 are independently configured to form a mapping electrode pair, so that the energized circuits can be used to detect the electrical signal transmission status of the ablated tissue 340 after ablation. During mapping, the two first electrodes 111 forming the mapping electrode pair have different polarities, and a voltage is set across them to generate a current, thereby achieving mapping; the two second electrodes 211 forming the mapping electrode pair have different polarities, and a voltage is set across them to generate a current, thereby achieving mapping; the first electrode and the second electrode forming the mapping electrode pair have different polarities, and a voltage is set across them to generate a current, thereby achieving mapping.

[0093] In some embodiments, the power circuits of the two second electrodes 211 are independently set to form a mapping electrode pair, so as to use the power circuits to detect the electrical signal transmission status of the tissue to be ablated 340 after ablation; and / or, the power circuits of the first electrode 111 and the second electrode 211 are independently set to form a mapping electrode pair, so as to use the power circuits to detect the electrical signal transmission status of the tissue to be ablated 340 after ablation.

[0094] During mapping, two adjacent first electrodes 111, either with the same or different electrode tips, have different polarities and are set across a voltage to generate a current, thereby achieving mapping. Similarly, two adjacent second electrodes 211, either with the same or different electrode tips, have different polarities and are set across a voltage to generate a current, thereby achieving mapping. In this way, the first electrode pair and the second electrode pair can cooperate with each other.

[0095] Specifically, each pair of first magnetic members 112 and second magnetic members 212 works relatively independently, that is, the number of magnetic members working can be determined according to actual needs.

[0096] Optionally, the magnetic force of the magnetic part is controllable and adjustable, with a smaller magnetic force used for initial positioning and a larger magnetic force used for final positioning, so that the inner and outer electrode assemblies are flexible during initial positioning and firm after final positioning, ensuring the fit of the electrodes and thus ensuring the ablation effect.

[0097] Optionally, the plurality of first magnetic members 112 are all disposed in the lumen of the first protective sheath 113 .

[0098] Optionally, the first magnetic member 112 is an electromagnet or a permanent magnet; and / or the second magnetic member 212 is an electromagnet or a permanent magnet.

[0099] Specifically, a plurality of first magnetic members 112 are all arranged in the first protective sheath 113, and the plurality of first magnetic members 112 are spaced apart along the extension direction of the first protective sheath 113. Preferably, the plurality of first magnetic members 112 and the plurality of first electrodes 111 are staggered along the extension direction of the first protective sheath 113 so that the plurality of first electrodes 111 are spaced apart, that is, each first magnetic member 112 is used to separate the corresponding two first electrodes 111. When working, each pair of first magnetic members 112 and second magnetic members 212 work relatively independently, that is, the number of working magnetic members can be determined according to actual needs. The magnetic force of the magnetic member is controllable and adjustable, and a smaller magnetic force is used for the initial positioning, and a larger magnetic force is used for the final positioning, so that the inner and outer electrode assemblies are flexible during the initial positioning and firm after the final positioning, thereby ensuring the fit of the electrodes and thus ensuring the ablation effect.

[0100] In this embodiment, if Figure 2 As shown, shielding side eaves 115 are provided on opposite sides of the first protective sheath 113 to form a shielding and protective effect on the multiple first electrodes 111 and the multiple first magnetic members 112 inside the first protective sheath 113, so as to prevent the blood of the pericardial tissue from entering the area between the first protective sheath 113 and the epicardium during the ablation process and affecting the tightness between the first protective sheath 113 and the epicardium, and to avoid the measurement accuracy of the resistance value between the first electrode 111 and the second electrode during ablation, thereby affecting the ablation effect.

[0101] Optionally, the shielding side eaves 115 are strip-shaped and extend along the extension direction of the first protective sheath 113. By providing the shielding side eaves 115, tissue fluid and liquids such as saline outside the ablation line can be blocked from entering the ablated tissue, thereby preventing the measurement accuracy of the resistance value between the first electrode and the second electrode during ablation, thereby affecting the ablation effect.

[0102] Specifically, a wire laying groove 120 for accommodating a wire is provided on the first electrode 111 and / or the first magnetic member 112 , and the wire is used to connect to the first electrode 111 ; alternatively, the wire laying groove 120 for laying the wire is provided on the inner wall of the first protective sheath 113 .

[0103] In some embodiments, the first electrodes 111 included in the first electrode tip 110 are insulated from each other.

[0104] In some embodiments, the power supply circuits of the plurality of first electrodes 111 are independently provided to individually control each first electrode 111 .

[0105] In some embodiments, the energized circuits of two adjacent first electrodes are independently configured to form an ablation electrode pair to achieve an ablation function.

[0106] In some embodiments, two adjacent first electrodes 111 of the same first electrode tip 110 form an electrode pair, and the two electrode pairs spaced apart cooperate with each other to test electrical signal transmission in tissues between the two electrode pairs.

[0107] In some embodiments, two adjacent first electrodes 111 in different first electrode tips 110 form an electrode pair, and the polarities of the two first electrodes in the electrode pair are opposite to detect electrical signal transmission in tissue between the two first electrodes of the electrode pair.

[0108] In some embodiments, the second electrodes 211 included in the second electrode tip 210 are insulated from each other.

[0109] In some embodiments, the power supply circuits of the plurality of second electrodes 211 are independently provided to individually control each second electrode 211 .

[0110] In some embodiments, two adjacent second electrodes 211 of the same second electrode tip 210 form an electrode pair, and the two electrode pairs spaced apart cooperate with each other to test electrical signal transmission in tissues between the two electrode pairs.

[0111] In some embodiments, two adjacent second electrodes 211 in different second electrode tips 210 form an electrode pair, and the two second electrodes in the electrode pair have opposite polarities to detect electrical signal transmission in tissue between the two first electrodes of the electrode pair.

[0112] The second electrode assembly 200 includes a manipulation handle 260 and a plurality of second electrode tips 210. The number of second electrodes 211 of the plurality of second electrode tips 210 is different. One of the plurality of second electrode tips 210 can be selectively connected to the manipulation handle 260. The plurality of second electrode tips 210 are arranged in cooperation with the plurality of first electrode tips 110.

[0113] In this embodiment, if Figure 7 and Figure 8 As shown, the second electrode tip 210 includes a second protective sheath 214, and the second electrode 211 is arranged on the second protective sheath 214; wherein, the second electrode tip 210 includes a developing member 213, and the developing member 213 is arranged on the second protective sheath 214 to mark the position of the second electrode tip 210 by the developing member 213; and / or, the second electrode 211 is made of a metal developing material, and the metal developing material includes at least one of the following materials: platinum, platinum alloy, tantalum, and gold-plated beryllium bronze; and / or, the second protective sheath 214 is made of a developing material, and the components of the developing material include barium sulfate (BaSO4).

[0114] Specifically, multiple second magnetic members 212 and multiple second electrodes 211 are all mounted on the second protective sheath 214; optionally, multiple second magnetic members 212 and multiple second electrodes 211 are staggered along the extension direction of the second protective sheath so that the multiple second electrodes 211 are arranged at intervals, that is, each second magnetic member 212 is used to separate the corresponding two second electrodes 211.

[0115] Optionally, refer to Figure 14 and Figure 20 The second magnetic members 212 and the second electrodes 211 are all annular structures, or have square, V-shaped, D-shaped, arched or other cross-sectional structures. Figure 20 As shown, the cross section of the second electrode 211 is polygonal, specifically square.

[0116] In this embodiment, the developing element 213, the developing second electrode 211, and the developing second protective sheath 214 indicate the position of the second electrode assembly 200 when it enters the tissue to be ablated. Optionally, the number of developing elements 213 on the second electrode tip 210 can range from 1 to 6, and they can be provided separately, or the second electrode 211 can also incorporate the developing function. In this embodiment, the outer walls of the developing elements 213 and the second protective sheath 214 are flush, preventing damage to the patient during surgery.

[0117] In the embodiment, the second electrodes 211 are arranged along the extension direction of the second protective sheath 214, the second electrodes 211 are sleeved on the second protective sheath 214, and the electrode faces of the second electrodes are located outside the surface of the second protective sheath 214. The developing member can be absent, or there are multiple developing members 213, and the multiple developing members 213 are arranged along the extension direction of the second protective sheath 214; and / or the outer surface of the second protective sheath 214 is divided into a first surface part corresponding to the developing member 213 and a second surface part connected with the first surface part, the first surface part is a concave structure, the developing member 213 is sleeved on the first surface part, and the outer surface of the developing member 213 is flush with or lower than the second surface part.

[0118] In operation, first, the first electrode assembly 100 is fixed on the epicardium by the positioning member, then the second electrode assembly 200 enters the inside of the heart, the second electrode assembly 200 is placed in the endocardium at the position corresponding to the first electrode assembly 100 by the indication of the developing member 213, and then the first pair of magnetic members, the second pair of magnetic members and the third pair of magnetic members located at the first electrode tip 110 and the second electrode tip 210 are opened synchronously and sequentially, at which time the two electrode assemblies complete the initial positioning. After the initial positioning is completed, the remaining magnetic members are opened in pairs, and the final positioning is completed.

[0119] Specifically, the first electrode 111 and the second electrode 211 are relatively independent in operation, that is, the number of working electrodes can be controlled.

[0120] In the embodiment, as shown in Figure 5 , the first electrode 111 has an electrode face 1110 arranged towards the tissue to be ablated, and the first protective sheath 113 has a protective sheath face 1130 arranged towards the tissue to be ablated; wherein the electrode face 1110 is located on the side of the protective sheath face 1130 close to the tissue to be ablated.

[0121] In the embodiment, the first electrode 111 is multiple, and the multiple first electrodes 111 are arranged along the extension direction of the first electrode tip 110; the minimum distance between the electrode face 1110 of the first electrode 111 and the protective sheath face 1130 is the same. The minimum distance between the electrode face 1110 of the first electrode 111 and the protective sheath face 1130 is in the range of 0-0.5mm, and the height difference can make the first electrode fully contact with the ablated surface and ensure the ablation effect. The height difference between the electrode face 1110 of the first electrode 111 and the protective sheath face 1130 is preferably 0.2mm.

[0122] In the embodiment, the electrode face 1110 and the protective sheath face 1130 are both planes.

[0123] In order to realize the cooling of the first electrode tip 110, as shown in Figure 5As shown, the first electrode 111 is multiple, and the multiple first electrodes 111 are arranged at intervals along the extension direction of the first electrode end 110; at least one of the multiple first electrodes 111 is provided with a cooling hole 1112 for the cooling fluid to flow through; and / or, the first protective sheath 113 is provided with a cooling channel for the cooling fluid to flow through. In this embodiment, the cooling hole 1112 is provided for local cooling during ablation, so as to protect other parts except the ablated tissue from being damaged. By providing the cooling channel, the side of the electrode can be cooled.

[0124] In this embodiment, at least one of the multiple first electrodes 111 is provided with 1-4 cooling holes 1112. The number of cooling holes on each first electrode 111 is 0-4, so as to ensure the temperature control during ablation.

[0125] The application also provides a radio frequency ablation device, as shown in the accompanying drawings, which comprises a radio frequency host 310 and the ablation device described above, and the ablation device is connected with the radio frequency host 310. Figure 10

[0126] Specifically, as shown in the accompanying drawings, the radio frequency host 310 is provided with a display screen 313, and the display screen 313 is used to display the impedance of the ablated tissue between the two corresponding first electrodes 111 and second electrodes 211 and / or the radio frequency power. Figure 9

[0127] Specifically, the radio frequency host 310 is further provided with an ablation interface 311, and the first electrode assembly 100 and the second electrode assembly 200 each comprise multiple wire assemblies, each wire assembly comprises a wire connector and multiple parallelly arranged wires connected with the wire connector, and each wire is used to connect with a corresponding electrode; the ablation interface 311 has a first ablation interface part and a second ablation interface part, the first ablation interface part has multiple first ablation interfaces for the multiple wire connectors of the first electrode assembly 100 to be inserted, and the second ablation interface part has multiple second ablation interfaces for the multiple wire connectors of the second electrode assembly 200 to be inserted, so as to provide appropriate radio frequency power to the corresponding first electrodes 111 and the corresponding second electrodes 211 through each first ablation interface and each second ablation interface.

[0128] ​​Specifically, when the first magnetic part 112 and the second magnetic part 212 are both electromagnets, an electromagnetic interface 312 is also provided on the RF host 310, and the first electrode assembly 100 and the second electrode assembly 200 both include multiple electromagnet assemblies, each electromagnet assembly includes an electromagnetic connector and multiple electromagnetic wires arranged in parallel connected to the electromagnetic connector, and each electromagnetic wire is used to connect to the corresponding electromagnet; the electromagnetic interface 312 has a first electromagnetic interface part and a second electromagnetic interface part, the first electromagnetic interface part has multiple first magnetic interfaces for inserting multiple electromagnetic connectors of the first electrode assembly 100, and the second electromagnetic interface part has multiple second magnetic interfaces for inserting multiple electromagnetic connectors of the second electrode assembly 200, so as to supply power to the corresponding first magnetic part 112 and the corresponding second magnetic part 212 through each first magnetic interface and each second magnetic interface, thereby generating an attractive force between the corresponding first magnetic part 112 and the corresponding second magnetic part 212.

[0129] Reference Figures 12 to 16 As shown, it can be seen that the ablation principle of the ablation device in this embodiment on the ablated tissue 340 can be reflected, and the ablation range 330 of the ablation device can be reflected.

[0130] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0131] The ablation device of the present invention includes a first electrode assembly 100 having a first electrode tip 110 and a second electrode assembly 200 having a second electrode tip 210. The first electrode assembly 100 and the second electrode assembly 200 can be used independently. The first electrode tip 110 includes a first protective sheath 113 and a plurality of first electrodes 111 disposed on the first protective sheath 113. Furthermore, the first protective sheath 113 is strip-shaped, and the plurality of first electrodes 111 are spaced apart along the extension direction of the first protective sheath 113. Specifically, the plurality of first electrodes 111 simultaneously act on their corresponding tissues to form a complete ablation line.

[0132] The first electrode and the second electrode of the ablation device are arranged relative to each other so as to ablate the tissue to be ablated between the first electrode and the second electrode through the first electrode and the second electrode. In specific use, the first electrode assembly and the second electrode assembly are used as the epicardial electrode and the endocardial electrode respectively, so that the first electrode assembly and the second electrode assembly act on the epicardium and the endocardium respectively, so as to achieve simultaneous ablation of the epicardium and the endocardium, thereby solving the problem that although cardiac surgery is a dynamic ablation, surgical ablation is relatively traumatic and the postoperative recovery is slow, and solving the problem that the energy of interventional ablation in internal medicine is constant and the output power cannot be adjusted in time according to the ablation effect, resulting in overburning or non-penetrating the wall; thereby achieving a good ablation effect and improving ablation efficiency; it can be seen that the use of this ablation device can solve the problem of unsatisfactory ablation effect of ablation devices in the prior art.

[0133] Whether performing endocardial ablation, epicardial ablation, or simultaneous endocardial and epicardial ablation, a single electrode assembly or coordinated electrode assemblies can perform timely mapping and monitor the ablation effect, solving the current problem that post-ablation mapping still requires the use of external instruments and is point-based mapping, thereby improving the surgical ablation effect.

[0134] The radiofrequency ablation device of the present invention includes the above-mentioned ablation device, so the radiofrequency ablation device has at least the same technical effect as the ablation device.

[0135] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0136] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0137] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0138] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. An ablation device, characterized in that: include: A first electrode assembly (100), the first electrode assembly (100) comprising a first electrode tip (110), the first electrode tip (110) comprising a first protective sheath (113) and a plurality of first electrodes (111) disposed on the first protective sheath (113); The first protective sheath (113) is in a strip shape, and the plurality of first electrodes (111) are arranged at intervals along an extension direction of the first protective sheath (113); The first electrode terminal (110) further comprises: a positioning member (114), the positioning member (114) being arranged on the first protective sheath (113), and the first electrode tip (110) being positioned on the epicardium via the positioning member (114); When the positioning member (114) is in a contracted state, the positioning member (114) is located inside the first protective sheath (113) and is filled in the first protective sheath (113); when the positioning member (114) is in an expanded state, at least a portion of the positioning member (114) extends from the inside of the first protective sheath (113) to the outside of the first protective sheath (113); Shielding side eaves (115) are provided on opposite sides of the first protective sheath (113); the shielding side eaves (115) are strip-shaped, and the shielding side eaves (115) extend along the extension direction of the first protective sheath (113); a second electrode assembly (200), the second electrode assembly (200) comprising a second electrode terminal (210), the second electrode terminal (210) comprising a plurality of second electrodes (211), the plurality of second electrodes (211) being arranged at intervals along an extension direction of the second electrode terminal (210); The plurality of first electrodes (111) and the plurality of second electrodes (211) are arranged in cooperation with each other and are arranged relative to each other, and the second electrode tip (210) is arranged on the endocardium so as to ablate the tissue to be ablated between the first electrode (111) and the second electrode (211) through the first electrode (111) and the second electrode (211); The first electrode tip (110) includes a U-shaped opening structure, and the first electrode (111) is arranged in the U-shaped opening structure; when the ablation device ablates the tissue to be ablated (340), the second electrode tip (210) is arranged opposite to the opening portion of the U-shaped opening structure.

2. The ablation device according to claim 1, wherein: The first protective sheath (113) is made of a flexible material.

3. The ablation device according to claim 1, wherein: There are a plurality of positioning members (114), and the plurality of positioning members (114) are arranged at intervals along the extension direction of the first protective sheath (113) and are independently controlled.

4. The ablation device according to claim 1, wherein: The positioning piece (114) is in the shape of a strip, a square, or a circle, and the positioning piece (114) extends along the extension direction of the first protective sheath (113).

5. The ablation device according to claim 1, wherein: The ablation device further comprises: An ablation circuit (320) is provided on which the first electrode (111) and the second electrode (211) are both arranged to perform ablation by adjusting radio frequency energy between the first electrode (111) and the second electrode (211) by testing the impedance between each first electrode (111) and the corresponding second electrode (211).

6. The ablation device according to claim 1, wherein: The first electrode terminal (110) includes a first magnetic part (112), and the second electrode terminal (210) includes a second magnetic part (212). The first magnetic part (112) and the second magnetic part (212) cooperate with each other to relatively fix the first electrode terminal (110) and the second electrode terminal (210).

7. The ablation device according to claim 6, characterized in that: The first magnetic member (112) and the second magnetic member (212) are both plural, the first electrode terminal (110) and the second electrode terminal (210) are both bar-shaped, the plural first magnetic members (112) are arranged at intervals along the extension direction of the first electrode terminal (110), and the plural second magnetic members (212) are arranged at intervals along the extension direction of the second electrode terminal (210).

8. The ablation device according to claim 7, characterized in that: The plurality of first magnetic members (112) and the plurality of first electrodes (111) are arranged in a staggered manner, and the plurality of second magnetic members (212) and the plurality of second electrodes (211) are arranged in a staggered manner.

9. The ablation device according to claim 6, characterized in that Adjacent first electrodes (111) and first magnetic members (112) are insulated from each other, and adjacent second electrodes (211) and second magnetic members (212) are insulated from each other.

10. The ablation device according to claim 6, characterized in that The opposing surfaces between adjacent first electrodes (111) and first magnetic members (112) are sprayed with insulating paint, or an insulating partition is provided between adjacent first electrodes (111) and first magnetic members (112); the opposing surfaces between adjacent second electrodes (211) and second magnetic members (212) are sprayed with insulating paint, or an insulating partition is provided between adjacent second electrodes (211) and second magnetic members (212).

11. The ablation device according to claim 6, characterized in that: The outer surfaces of the first magnetic component (112) and the second magnetic component (212) are both covered with an insulating layer.

12. The ablation device according to claim 6, characterized in that The ablation device includes a first electrode circuit, a first magnetic circuit, a second electrode circuit, and a second magnetic circuit. The first electrode circuit is connected to the first electrode (111), the first magnetic circuit is connected to the first magnetic component (112), the second electrode circuit is connected to the second electrode (211), and the second magnetic circuit is connected to the second magnetic component (212).

13. The ablation device according to claim 1, wherein: The energized circuits of the two first electrodes (111) are independently arranged to form a mapping electrode pair, so as to utilize the energized circuits to detect the electrical signal transmission status of the tissue to be ablated (340) after ablation.

14. The ablation device according to claim 1, wherein: The power circuits of the two second electrodes (211) are independently set to form a mapping electrode pair, so as to use the power circuit to detect the electrical signal transmission status of the tissue to be ablated (340) after ablation; and / or, the power circuits of the first electrode (111) and the second electrode (211) are independently set to form a mapping electrode pair, so as to use the power circuit to detect the electrical signal transmission status of the tissue to be ablated (340) after ablation.

15. The ablation device according to claim 1, wherein: There are multiple first electrode terminals (110) and multiple second electrode terminals.

16. The ablation device according to claim 1, wherein: The plurality of first electrodes (111) included in the first electrode terminal (110) are insulated from each other.

17. The ablation device according to claim 1, wherein: The power supply circuits of the plurality of first electrodes (111) are independently provided to individually control each of the first electrodes (111).

18. The ablation device according to claim 1, wherein: Two adjacent first electrodes (111) of the same first electrode tip (110) form an electrode pair, and the two electrode pairs arranged at intervals cooperate with each other to test the electrical signal transmission of tissues between the two electrode pairs.

19. The ablation device according to claim 1, wherein: Two adjacent first electrodes (111) in different first electrode tips (110) form an electrode pair, and the polarities of the two first electrodes (111) in the electrode pair are opposite to detect the electrical signal transmission of the tissue between the two first electrodes (111) of the electrode pair.

20. The ablation device according to claim 1, wherein The first electrode (111) has an electrode surface (1110) disposed toward the tissue to be ablated, and the first protective sheath (113) has a protective sheath surface (1130) disposed toward the tissue to be ablated; wherein the electrode surface (1110) is located on a side of the protective sheath surface (1130) close to the tissue to be ablated.

21. The ablation device according to claim 20, wherein: There are multiple first electrodes (111), and the multiple first electrodes (111) are arranged at intervals along the extension direction of the first electrode terminal (110); the minimum distances between the electrode surfaces (1110) of the multiple first electrodes (111) and the protective sheath surface (1130) are all the same.

22. The ablation device according to claim 20, wherein: The electrode surface (1110) and the protective sheath surface (1130) are both planes.

23. The ablation device according to claim 1, wherein: There are a plurality of first electrodes (111), and the plurality of first electrodes (111) are arranged at intervals along the extension direction of the first electrode terminal (110); at least one of the plurality of first electrodes (111) is provided with a cooling hole (1112) for circulating a cooling fluid; and / or a cooling pipe for circulating a cooling fluid is provided in the first protective sheath (113).

24. The ablation device according to claim 23, wherein: At least one of the plurality of first electrodes (111) is provided with 1 to 4 cooling holes (1112).

25. The ablation device according to claim 5, wherein: The second electrode tip (210) comprises a second protective sheath (214), and the second electrode (211) is arranged on the second protective sheath (214); The second electrode (211) is made of a metal developing material, and the metal developing material includes at least one of the following materials: platinum, platinum-iridium alloy, tantalum, and gold-plated beryllium bronze; and / or, The second protective sheath (214) is made of a developing material, and the components of the developing material include barium sulfate.

26. The ablation device according to claim 25, characterized in that The second electrodes (211) are arranged at intervals along the extension direction of the second protective sheath (214), the second electrodes (211) are sleeved on the second protective sheath (214), and the electrode surface of the second electrode (211) is located outside the surface of the second protective sheath (214).

27. A radiofrequency ablation device, comprising a radiofrequency host (310) and an ablation device connected to the radiofrequency host (310), characterized in that: The ablation device is the ablation device according to any one of claims 1 to 26.

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