Electrode assemblies, ablation devices, and radiofrequency ablation equipment

Abstract

The application provides an electrode assembly, an ablation device and a radio frequency ablation equipment, the electrode assembly comprises an electrode tip, the electrode tip comprises a protective sheath, a suction positioning piece arranged on the protective sheath and an electrode and a filling piece arranged in the protective sheath, so that the protective sheath is positioned on the tissue to be ablated by the action of the suction positioning piece; and the electrode is extruded by the filling piece to move towards the part to be ablated, so that the electrode can be attached to the inner wall of the protective sheath, and the outer wall of the protective sheath at the corresponding position is attached to the corresponding part to be ablated, so that the electrode can better act on the corresponding part to be ablated, and the ablation effect is guaranteed; it can be seen that the ablation effect of the ablation device in the prior art is not ideal.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an electrode assembly, 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 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 the operation, 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 and even burn-through and exposure. 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 electrode assembly, an ablation device and a radiofrequency ablation equipment to solve the problem that the current ablation device does not fit firmly with the tissue to be ablated, is easily detached from the tissue to be ablated and has unsatisfactory ablation effect.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an electrode assembly, which includes an electrode terminal head, and the electrode terminal head includes: a protective sheath; an electrode, the electrode is arranged in the protective sheath; a suction positioning member, the suction positioning member is arranged on the protective sheath, so that the protective sheath is positioned on the tissue to be ablated through the action of the suction positioning member; a filling member, the filling member is arranged in the cavity of the protective sheath, and at least a part of the filling member is expandable and contractible, so as to squeeze the electrode toward the tissue to be ablated when the filling member expands.

[0006] Furthermore, the protective sheath is strip-shaped, and there are multiple electrodes, which are spaced apart along the extension direction of the protective sheath; and / or there are multiple suction positioning members, which are spaced apart along the extension direction of the protective sheath.

[0007] Furthermore, the protective sheath is strip-shaped, and there are multiple fillers, which are arranged at intervals along the extension direction of the protective sheath and can be controlled independently; and / or, the filler is strip-shaped and extends along the extension direction of the protective sheath.

[0008] Furthermore, the suction positioning member is a suction cup structure; and / or the filling member is an airbag structure.

[0009] Further, the protective sheath is provided with a hole structure for avoiding the electrode, so that part of the structure of the electrode extends out of the cavity of the protective sheath through the hole structure.

[0010] Further, the electrode is multiple, the hole structure includes multiple avoiding holes, the multiple avoiding holes are provided one by one corresponding to the multiple electrodes, so that part of the structure of each electrode extends out of the outside of the protective sheath through the corresponding avoiding hole; and / or, the electrode is multiple, the hole structure is a strip-shaped opening, the strip-shaped opening is spaced along the extension direction of the protective sheath, and part of the structure of the multiple electrodes extends out of the outside of the protective sheath through the strip-shaped opening.

[0011] Further, the inner wall of the protective sheath is provided with a containing groove, when the filling piece is in the contracted state, the filling piece is accommodated in the containing groove; when the filling piece is in the expanded state, at least part of the filling piece is out of the containing groove to extrude the electrode towards the tissue to be ablated.

[0012] Further, the electrode assembly further includes a first magnetic piece, the first magnetic piece is arranged in the protective sheath; the electrode and / or the first magnetic piece is provided with a positioning groove for accommodating the filling piece.

[0013] Further, the electrode and the first magnetic piece are multiple, and the multiple electrodes and the multiple first magnetic pieces are arranged in turn and staggered along the extension direction of the protective sheath.

[0014] Further, the electrode and / or the first magnetic piece is provided with a wire laying groove for accommodating a wire, the wire is used for connecting with the electrode.

[0015] According to another aspect of the present application, there is provided an ablation device, which includes a first electrode assembly and a second electrode assembly, the first electrode assembly is the above-mentioned electrode assembly, the electrode of the first electrode assembly is a first electrode, the second electrode assembly includes a second electrode tip, the second electrode tip includes a second electrode, the second electrode is arranged opposite to the first electrode, 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.

[0016] According to still another aspect of the present application, there is provided a radio frequency ablation equipment, which includes a radio frequency host and an ablation device, the ablation device is connected with the radio frequency host.

[0017] Applying the technical solution of the present invention, the electrode assembly includes an electrode terminal head, which includes a protective sheath, an attractive positioning piece arranged on the protective sheath, and an electrode and a filling piece arranged in the protective sheath, so that the protective sheath is positioned on the tissue to be ablated by the action of the attractive positioning piece; and the electrode is squeezed by the filling piece to move the electrode toward the part to be ablated, so that the electrode can fit with the inner wall of the protective sheath, and the outer wall of the protective sheath at the corresponding position fits with the corresponding part to be ablated, thereby ensuring that the electrode can better act on the corresponding part to be ablated and ensuring the ablation effect; it can be seen that the use of this electrode assembly can solve the problem of unsatisfactory ablation effect of the ablation device in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 A schematic structural diagram of an optional electrode assembly according to the present invention is shown;

[0020] Figure 2 Shown Figure 1 An internal perspective structural diagram of an embodiment of an electrode assembly;

[0021] Figure 3 Shown Figure 2 a cross-sectional view of the electrode assembly in FIG.

[0022] Figure 4 Shown Figure 1 A cross-sectional view of another embodiment of an electrode assembly;

[0023] Figure 5 Shown Figure 1 A schematic structural diagram of the shielding side eaves of the electrode assembly;

[0024] Figure 6 Shown Figure 1 A longitudinal sectional view of a filler of an electrode assembly;

[0025] Figure 7 A schematic structural diagram of a second electrode assembly of an optional ablation device according to the present invention is shown;

[0026] Figure 8 Shown Figure 7 A partial enlarged view of the second electrode assembly of the ablation device;

[0027] Figure 9 Shown Figure 8 An enlarged view of part A of the second electrode assembly of the ablation device;

[0028] Figure 10 A schematic structural diagram of a radio frequency host of an optional radio frequency ablation device according to the present invention is shown;

[0029] Figure 11 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;

[0030] Figure 12 A schematic diagram showing the principle of the ablation device of the present invention when ablating tissue to be ablated;

[0031] Figure 13 A diagram showing the coordination between the first electrode and the second electrode of an embodiment of the ablation device of the present invention and the tissue to be ablated;

[0032] Figure 14 An ablation principle diagram showing one state of the ablation device of the present invention;

[0033] Figure 15 A diagram showing the ablation principle of the ablation device of the present invention in another state;

[0034] Figure 16 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;

[0035] Figure 17 A schematic structural diagram of a second embodiment of the first electrode assembly of the ablation device of the present invention is shown;

[0036] Figure 18 A schematic structural diagram of a second embodiment of a second electrode assembly of an ablation device according to the present invention is shown;

[0037] Figure 19 A diagram showing the coordination between the first electrode and the second electrode of another embodiment of the ablation device of the present invention and the tissue to be ablated is shown.

[0038] The above drawings include the following reference numerals:

[0039] 100. A first electrode assembly;

[0040] 110, electrode tip; 111, electrode; 1110, electrode surface; 1112, cooling hole; 112, first magnetic member; 113, protective sheath; 1130, protective sheath surface; 115, shielding side eaves; 116, filling member;

[0041] 117, suction positioning member; 1171, suction inner wall; 1172, suction outer wall; 1173, suction cavity;

[0042] 1174, first suction port; 1175, second suction port; 1176, air flow channel;

[0043] 120. Wire laying trough;

[0044] 200. Second electrode assembly;

[0045] 210, second electrode tip; 211, second electrode; 212, second magnetic member; 213, developing member; 214, second protective sheath;

[0046] 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

[0047] 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.

[0048] The present invention provides an electrode assembly, please refer to Figures 1 to 19 The electrode assembly includes an electrode tip 110, which includes a protective sheath 113, an electrode 111, a suction positioning member 117 and a filling member 116. The electrode 111 is arranged in the protective sheath 113; the suction positioning member 117 is arranged on the protective sheath 113, so that the protective sheath 113 is positioned on the tissue to be ablated through the action of the suction positioning member 117; the filling member 116 is arranged in the cavity of the protective sheath 113, and at least a part of the filling member 116 is expandable and contractible, so as to squeeze the electrode 111 toward the tissue to be ablated when the filling member 116 expands.

[0049] In the electrode assembly of the present invention, the electrode assembly includes an electrode tip 110, and the electrode tip 110 includes a protective sheath 113, an attractive positioning member 117 arranged on the protective sheath 113, and an electrode 111 and a filling member 116 arranged in the protective sheath 113, so that the protective sheath 113 is positioned on the tissue to be ablated through the action of the attractive positioning member 117; and the electrode 111 is squeezed by the filling member 116 to move the electrode 111 toward the part to be ablated, so that the electrode 111 can be fitted with the inner wall of the protective sheath 113, and the outer wall of the protective sheath 113 at the corresponding position is fitted with the corresponding part to be ablated, thereby ensuring that the electrode 111 can better act on the corresponding part to be ablated and ensure the ablation effect; it can be seen that the use of this electrode assembly can solve the problem of unsatisfactory ablation effect of the internal medicine interventional ablation device in the prior art.

[0050] Specifically, if Figure 2As shown, the protective sheath 113 is strip-shaped, and the plurality of electrodes 111 are arranged at intervals along the extension direction of the protective sheath 113; that is, the plurality of electrodes 111 simultaneously act on the corresponding parts to be ablated, so as to form a complete ablation line, thereby ensuring the ablation effect and improving the ablation efficiency; and the plurality of electrodes 111 are arranged at intervals, so as to avoid mutual influence between adjacent electrodes 111.

[0051] Optionally, the protective sheath 113 is tubular, and the plurality of electrodes 111 are arranged in the lumen of the protective sheath 113.

[0052] In the embodiment, one structure of the filling member 116 is as follows: as shown, Figure 6 the filling member 116 is strip-shaped, the protective sheath 113 is strip-shaped, and the filling member 116 extends along the extension direction of the protective sheath 113. Specifically, the filling member 116 is in the form of a gasbag structure, so as to form a pressing action on the plurality of electrodes 111 when the gasbag structure is inflated and expanded.

[0053] In the embodiment, another structure of the filling member 116 is as follows: the filling member 116 is in plurality, and the plurality of filling members 116 are arranged at intervals along the extension direction of the protective sheath 113 and are independently controllable; the plurality of filling members 116 and the plurality of electrodes 111 are arranged in one-to-one correspondence, so that each filling member 116 can form a pressing action on the corresponding electrode 111; each filling member 116 is arranged on the side of the corresponding electrode 111 away from the tissue to be ablated, so as to realize the movement of each electrode 111 towards the corresponding tissue to be ablated when each filling member 116 forms a pressing action on the corresponding electrode 111. Specifically, each filling member 116 is in the form of a gasbag structure, so as to form a pressing action on the corresponding electrode 111 when the gasbag structure is inflated and expanded.

[0054] Specifically, the suction positioning member 117 is arranged in pairs, and each pair of suction positioning members 117 works independently in operation, that is, the number of suction positioning members working can be determined according to actual needs.

[0055] Specifically, the suction positioning member 117 is in the form of a suction disc structure.

[0056] Specifically, as shown in Figure 3 and Figure 4 the suction positioning member 117 includes a suction inner wall 1171 and a suction outer wall 1172, a suction cavity 1173 is formed between the suction inner wall 1171 and the suction outer wall 1172, a first suction port 1174 and a second suction port 1175 are in communication with the suction cavity 1173, and the first suction port 1174 and the second suction port 1175 are oriented in the same direction.

[0057] The suction inner wall 1171 and the suction outer wall 1171 are both U-shaped structures, and the suction inner wall 1171 and the suction outer wall 1172 are arranged around the protective sheath 113 .

[0058] The suction positioning member 117 further includes an air flow channel 1176 , an air outlet end of the air flow channel 1176 is in communication with the suction cavity 1173 , so as to fill and exhaust air into the suction cavity 1173 through the air flow channel 1176 .

[0059] Optionally, there are multiple suction positioning members 117.

[0060] In this embodiment, one arrangement of the multiple suction positioning members 117 is: the multiple suction positioning members 117 are arranged at intervals along the extension direction of the protective sheath 113, so that the protective sheath 113 is stably positioned on the tissue to be ablated, ensuring the positioning effect of the protective sheath 113.

[0061] In this embodiment, another arrangement of the plurality of suction positioning members 117 is as follows: Figure 2 As shown, multiple suction positioning members 117 are arranged in pairs, and the two pairs of suction positioning members 117 are respectively arranged on opposite sides of the protective sheath 113 to ensure that both sides of the protective sheath 113 have a good fit with the ablated tissue, so that the corresponding electrodes 111 can better act on their corresponding ablated tissue to ensure the ablation effect.

[0062] Multiple pairs of suction positioning members 117 are arranged at intervals along the extension direction of the protective sheath 113 so that the protective sheath 113 can be stably positioned on the tissue to be ablated, ensuring the positioning effect of the protective sheath 113, and then ensuring the overall fit between the protective sheath 113 and the ablated tissue, so that each electrode 111 can better act on its corresponding ablated tissue, thereby ensuring the ablation effect.

[0063] Specifically, the protective sheath 113 is provided with an opening structure for avoiding the electrode 111, so that part of the structure of the electrode 111 extends out of the cavity of the protective sheath 113 through the opening structure. In this way, the part of the electrode structure extending out of the cavity of the protective sheath 113 can directly contact the corresponding tissue to be ablated, thereby enabling this part of the electrode structure to better act on the corresponding tissue to be ablated, so as to further ensure the ablation effect and improve the ablation efficiency.

[0064] In this embodiment, one setting form of the opening structure is: when there are multiple electrodes 111, the opening structure includes multiple avoidance openings, and the multiple avoidance openings are arranged one-to-one corresponding to the multiple electrodes 111, so that part of the structure of each electrode 111 extends to the outside of the protective sheath 113 through the corresponding avoidance opening, and then the part of the structure of each electrode 111 extending outside the protective sheath 113 can directly contact the corresponding tissue to be ablated.

[0065] In this embodiment, another setting form of the open hole structure is: the open hole structure is a strip opening, the strip openings are spaced along the extension direction of the protective sheath 113, and part of the structure of the multiple electrodes 111 extends to the outside of the protective sheath 113 through the strip openings.

[0066] In this embodiment, one arrangement of the filler 116 is: a receiving groove is provided on the inner wall of the protective sheath 113, and when the filler 116 is in a contracted state, the filler 116 is received in the receiving groove; when the filler 116 is in an expanded state, at least part of the filler 116 is released from the receiving groove to squeeze the electrode 111 toward the tissue to be ablated.

[0067] In this embodiment, another arrangement of the filling piece 116 is as follows: a positioning groove for accommodating the airbag structure is provided on the electrode 111 and / or the first magnetic piece 112; when the filling piece 116 is in a contracted state, the filling piece 116 is received in the positioning groove; when the filling piece 116 is in an expanded state, at least a portion of the filling piece 116 is released from the positioning groove to squeeze the electrode 111 toward the tissue to be ablated.

[0068] Specifically, the electrode assembly further includes a first magnetic member 112 , which is disposed within a protective sheath 113 .

[0069] Optionally, there are multiple electrodes 111 and multiple first magnetic members 112, and the multiple electrodes 111 and the multiple first magnetic members 112 are arranged alternately in sequence along the extension direction of the protective sheath 113 so that the multiple electrodes 111 are arranged at intervals, that is, each first magnetic member 112 is used to separate the corresponding two electrodes 111.

[0070] Optionally, the plurality of first magnetic members 112 are all disposed in the lumen of the protective sheath 113 .

[0071] Specifically, a wire laying groove 120 for accommodating a wire is provided on the electrode 111 and / or the first magnetic member 112 , and the wire is used to be connected to the electrode 111 .

[0072] The present invention also provides an ablation device, which includes a first electrode assembly 100 and a second electrode assembly 200. The first electrode assembly 100 is the above-mentioned electrode assembly, and the electrode of the first electrode assembly 100 is a first electrode, that is, the first electrode end head of the first electrode assembly 100 is the electrode end head 110, and the first electrode is the electrode 111. The second electrode assembly 200 includes a second electrode end head 210, and the second electrode end head 210 includes a second electrode 211. The second electrode 211 is arranged opposite to the first electrode so as to ablate the tissue to be ablated between the first electrode and the second electrode 211 through the first electrode and the second electrode 211.

[0073] In some embodiments, the second electrode assembly 200 further comprises a second magnetic member 212, and the second electrode 211 is in plurality, and the plurality of second electrodes 211 and the plurality of second magnetic members 212 are arranged in sequence and staggered along the extension direction of the electrode tip 110.

[0074] In some embodiments, the first magnetic member 112 of the first electrode assembly 100 cooperates with the second magnetic member 212 to relatively fix the first electrode tip 110 and the second electrode tip 210 of the first electrode assembly 100.

[0075] In some embodiments, the first electrode is in plurality, and the first magnetic member 112 and the second magnetic member 212 are in plurality, and the plurality of first magnetic members 112 are arranged in staggered intervals with the plurality of first electrodes, and the plurality of second magnetic members 212 are arranged in staggered intervals with the plurality of second electrodes 211.

[0076] In some embodiments, the adjacent first electrodes and the first magnetic member 112 of the first electrode assembly 100 are insulated, and the adjacent second electrodes 211 and the second magnetic member 212 are insulated.

[0077] In some embodiments, the relative surfaces between the adjacent first electrodes and the first magnetic member 112 of the first electrode assembly 100 are sprayed with insulating paint, or the adjacent first electrodes and the first magnetic member 112 are provided with insulating partitions; the relative surfaces between the adjacent second electrodes 211 and the second magnetic member 212 are sprayed with insulating paint, or the adjacent second electrodes 211 and the second magnetic member 212 are provided with insulating partitions. The insulating partitions are designed integrally or fixed separately with the protective sheath.

[0078] In some embodiments, the outer surfaces of the first magnetic member 112 and the second magnetic member 212 are coated with an insulating layer.

[0079] In some embodiments, the first electrode, the first magnetic member 112 of the first electrode assembly 100, the second electrode 211 and the second magnetic member 212 are all connected with independent energizing circuits for separate control. The plurality of first electrodes, second electrodes, first magnetic members and second magnetic members can work independently, thereby the magnetic property can be adjusted, and the number of ablation electrodes can be adjusted. The energizing circuits of two adjacent first electrodes or second electrodes are independently arranged to form an ablation electrode pair to realize the ablation function.

[0080] In some embodiments, there are multiple first electrodes, and the power circuits of the two first electrodes 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, there are multiple second electrodes 211, and 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 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. During mapping, the two first electrodes forming the mapping electrode pair have different polarities, and are set across a voltage to form a current, thereby achieving mapping; the two second electrodes 211 forming the mapping electrode pair have different polarities, and are set across a voltage to form a current, thereby achieving mapping; the first electrode and the second electrode 211 forming the mapping electrode pair have different polarities, and are set across a voltage to form a current, thereby achieving mapping.

[0081] In some embodiments, the first electrode assembly 100 includes a plurality of first electrode tips 110 and a plurality of second electrode tips 210 .

[0082] Specifically, the ablation device further includes an ablation circuit 320 , in which the first electrode and the second electrode 211 are both arranged, so as to adjust the radio frequency energy between the first electrode and the second electrode 211 to perform ablation by testing the impedance between the first electrode and the corresponding second electrode 211 .

[0083] During specific use, the first electrode assembly 100 and the second electrode assembly 200 are used as epicardial electrodes and endocardial electrodes, respectively, so that the first electrode assembly 100 and the second electrode assembly 200 act on the epicardium and the endocardium, respectively, to achieve simultaneous ablation of the epicardium and the 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.

[0084] In addition, by oppositely arranging the first electrode and the second electrode 211, the impedance between the first electrode and the second electrode 211 can be tested in real time, and the radio frequency energy between the first electrode and the second electrode 211 is adjusted according to the impedance between the first electrode and the second electrode 211 detected in real time to perform ablation, and the machine alarms when the impedance reaches a certain resistance value, so as to avoid excessive ablation, thereby solving the problems of limited unilateral ablation depth, difficulty in ensuring complete dehydration and denaturation of tissues from inside to outside, and difficulty in controlling radio frequency power in the prior art. The power is too small to cause incomplete ablation, and the power is too large to cause excessive ablation, tissue necrosis, and even burning through and leaking.

[0085] In 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, so as to accelerate the vibration of intracellular molecules; in the second stage of ablation, as the impedance of the ablated tissue between the electrodes increases, the radio frequency power gradually increases, and when the impedance of the ablated tissue between the electrodes increases to the first preset value, the radio frequency power also increases to the 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, so as to ensure the completeness of the ablation and prevent the phenomenon of tissue surface scabbing or damage to the patient caused by high radio frequency power output; until the impedance of the ablated tissue between the electrodes increases to the second preset value, the ablation is prompted to end.

[0086] Preferably, as shown in Figure 2 and Figure 8 , the first electrode and the second electrode 211 are both multiple, and the multiple first electrodes and the multiple second electrodes 211 are arranged one by one in correspondence; by arranging multiple first electrodes and multiple second electrodes 211, the multiple first electrodes and the multiple second electrodes 211 can simultaneously act on the corresponding tissues, so as to enhance the ablation effect and improve the ablation efficiency.

[0087] Specifically, the first electrode tip and the second electrode tip 210 are both strip-shaped, the multiple first electrodes are arranged at intervals along the extension direction of the first electrode tip, the multiple second electrodes 211 are arranged at intervals along the extension direction of the second electrode tip 210, and the first electrode and the corresponding second electrode 211 are arranged in cooperation with each other; that is, the multiple first electrodes and the multiple second electrodes 211 simultaneously act on the corresponding tissues to form a complete ablation line, so as to ensure the ablation effect; and the multiple first electrodes are arranged at intervals, and the multiple second electrodes 211 are arranged at intervals, so as to avoid mutual influence between adjacent two first electrodes and adjacent two second electrodes 211.

[0088] In this embodiment, the second electrode terminal 210 includes a second magnetic part 212, and the first magnetic part 112 and the second magnetic part 212 cooperate to fix the first electrode terminal 210 relative to the second electrode terminal 210, so that the first electrode of the first electrode terminal can be arranged relative to the corresponding second electrode 211 of the second electrode terminal 210.

[0089] Specifically, when there are multiple first magnetic parts 112 and multiple second magnetic parts 212, the multiple first magnetic parts 112 are arranged at intervals along the extension direction of the first electrode end, and the multiple second magnetic parts 212 are arranged at intervals along the extension direction of the second electrode end 210 to ensure the overall fixing effect between the first electrode end and the second electrode end 210.

[0090] 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.

[0091] 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.

[0092] Optionally, the first magnetic member 112 is an electromagnet; and / or the second magnetic member 212 is an electromagnet.

[0093] In this embodiment, shielding side ridges 115 are provided on opposite sides of the protective sheath 113 to provide shielding and protection for the multiple first electrodes and multiple first magnetic members 112 within the protective sheath 113. This prevents blood and other substances from the pericardial tissue from entering the area between the protective sheath 113 and the epicardium during ablation, thereby affecting the adhesion between the protective sheath 113 and the epicardium and preventing the measurement accuracy of the resistance value between the first and second electrodes 211 during ablation, thereby affecting the ablation effect. In addition, the provision of the shielding side ridges 115 can prevent tissue fluid and liquids such as saline outside the ablation line from entering the ablation area, thereby preventing the measurement accuracy of the resistance value between the first and second electrodes during ablation, thereby affecting the ablation effect.

[0094] Alternatively, as Figure 5 As shown, the shielding side eaves 115 are strip-shaped, and extend along the extension direction of the protective sheath 113 .

[0095] In this embodiment, if Figure 8 and Figure 9As 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 manufacturing material of the developing material includes barium sulfate (BaSO4).

[0096] Specifically, multiple second magnetic members 212 and multiple second electrodes 211 are all sleeved 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 214 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. During operation, 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. The magnetic force of the magnetic member is controllable and adjustable. A smaller magnetic force is used for initial positioning, and a larger magnetic force is used for final positioning, so that the inner and outer electrode assemblies are flexible during initial positioning and firm after final positioning, thereby ensuring the fit of the electrodes and thus ensuring the ablation effect.

[0097] Optionally, refer to Figure 13 and Figure 19 The second magnetic members 212 and the second electrodes 211 are all annular structures, or polygonal, V-shaped, D-shaped, arched, or other cross-sectional structures. Figure 19 As shown, the cross section of the second electrode 211 is polygonal, specifically square.

[0098] 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 ablation site. Optionally, the number of developing elements 213 on the second electrode tip 210 can range from 3 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.

[0099] In this embodiment, there may be no developing member 213, or there may be multiple developing members 213, and the multiple developing members 213 are arranged at intervals 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 portion corresponding to the developing member 213 and a second surface portion connected to the first surface portion, the first surface portion is a concave structure, the developing member 213 is mounted on the first surface portion, and the outer surface of the developing member 213 is flush with or lower than the second surface portion.

[0100] During operation, the first electrode assembly 100 is first fixed to the epicardium using a positioning member. The second electrode assembly 200 is then placed inside the heart and, guided by the developing member 213, is placed at the corresponding location on the endocardium of the first electrode assembly 100. The first, second, and third pairs of magnetic members located on the first and second electrode tips 110, 210 are then activated synchronously and sequentially, completing the initial positioning of the two electrode groups. After initial positioning, the remaining magnetic members of the two electrode assemblies are then activated in pairs to complete final positioning.

[0101] Specifically, the first electrode and the second electrode 211 are relatively independent when working, that is, the number of working electrodes can be controlled.

[0102] In this embodiment, if Figure 3 As shown, the first electrode has an electrode surface 1110 disposed toward the tissue to be ablated, and the protective sheath 113 has a protective sheath surface 1130 disposed toward the tissue to be ablated; wherein the electrode surface 1110 is located on the side of the protective sheath surface 1130 close to the tissue to be ablated.

[0103] In this embodiment, multiple first electrodes are provided, spaced apart along the extension direction of the first electrode tip 110. The minimum distance between the electrode surface 1110 of each of the multiple first electrodes and the protective sheath surface 1130 is the same. The minimum distance between the electrode surface 1110 of the first electrode and the protective sheath surface 1130 ranges from 0 to 0.5 mm. This height difference ensures sufficient contact between the first electrode and the ablated surface, ensuring an effective ablation. The preferred height difference between the electrode surface 1110 of the first electrode and the protective sheath surface 1130 is 0.2 mm.

[0104] In this embodiment, the electrode surface 1110 and the protective sheath surface 1130 are both planes.

[0105] In order to cool the first electrode tip 110, Figure 2As shown, multiple first electrodes are spaced apart along the extension direction of the first electrode tip 110. At least one of the multiple first electrodes is provided with a cooling hole 1112 for circulating a cooling fluid. Furthermore, a cooling channel for circulating a cooling fluid is provided within the protective sheath 113. In this embodiment, the provision of cooling holes 1112 allows for localized cooling during the ablation process, protecting areas outside the ablation site from damage. The provision of cooling channels also allows for cooling on the sides of the electrodes.

[0106] In this embodiment, at least one of the plurality of first electrodes is provided with 1 to 4 cooling holes 1112. The number of cooling holes on each first electrode is 0-4 to ensure temperature control during the ablation process.

[0107] The present invention also provides a radiofrequency ablation device, such as Figure 11 As shown, the radio frequency ablation device includes a radio frequency host 310 and the above-mentioned ablation device, and the ablation device is connected to the radio frequency host 310.

[0108] Specifically, if Figure 10 As shown, the RF host 310 is provided with a display screen 313 , and the display screen 313 is used to display the impedance and / or RF power of the ablated tissue measured between the two corresponding first electrodes and the second electrode 211 .

[0109] Specifically, an ablation interface 311 is also provided on the RF host 310. The first electrode assembly 100 and the second electrode assembly 200 both include multiple wire assemblies, each wire assembly includes a wire connector and multiple parallel-arranged wires connected to the wire connector, and each wire is used to connect to the corresponding electrode; the ablation interface 311 has a first ablation interface portion and a second ablation interface portion, the first ablation interface portion has multiple first ablation interfaces for inserting multiple wire connectors of the first electrode assembly 100, and the second ablation interface portion has multiple second ablation interfaces for inserting multiple wire connectors of the second electrode assembly 200, so as to provide appropriate RF power to the corresponding first electrode and the corresponding second electrode 211 through each first ablation interface and each second ablation interface.

[0110] 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.

[0111] Reference Figures 12 to 15 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.

[0112] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0113] In the electrode assembly of the present invention, the electrode assembly includes an electrode tip 110, and the electrode tip 110 includes a protective sheath 113, an attractive positioning member 117 arranged on the protective sheath 113, and an electrode 111 and a filling member 116 arranged in the protective sheath 113, so that the protective sheath 113 is positioned on the tissue to be ablated through the action of the attractive positioning member 117; and the electrode 111 is squeezed by the filling member 116 to move the electrode 111 toward the part to be ablated, so that the electrode 111 can be fitted with the inner wall of the protective sheath 113, and the outer wall of the protective sheath 113 at the corresponding position is fitted with the corresponding part to be ablated, thereby ensuring that the electrode 111 can better act on the corresponding part to be ablated and ensure the ablation effect; it can be seen that the use of this electrode assembly can solve the problem of unsatisfactory ablation effect of the internal medicine interventional ablation device in the prior art.

[0114] 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 on the first protective sheath. Furthermore, 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 to form a complete ablation line. When the protective sheath is made of a flexible material, this can address the problem of limited angles and inconvenient surgical procedures associated with existing surgical instruments.

[0115] 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 achieving a good ablation effect, 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, and the problem that cardiac surgery is dynamic ablation, but surgical ablation is more traumatic and has a slow recovery after surgery; 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 the ablation device in the prior art.

[0116] The ablation device of the present invention includes the above-mentioned electrode assembly, so the ablation device has at least the same technical effect as the electrode assembly.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An electrode assembly, characterized in that: The invention comprises an electrode terminal (110), wherein the electrode terminal (110) comprises: protective sheath (113); an electrode (111), the electrode (111) being disposed within the protective sheath (113); A suction positioning member (117), wherein the suction positioning member (117) is arranged on the protective sheath (113), so that the protective sheath (113) is positioned on the tissue to be ablated through the action of the suction positioning member (117); A filling piece (116), the filling piece (116) being arranged in the cavity of the protective sheath (113), and at least a portion of the filling piece (116) being expandable and contractible so as to press the electrode (111) toward the tissue to be ablated when the filling piece (116) expands; The protective sheath (113) is provided with an opening structure for avoiding the electrode (111), so that a portion of the electrode (111) extends out of the cavity of the protective sheath (113) through the opening structure; An accommodating groove is provided on the inner wall of the protective sheath (113); when the filling piece (116) is in a contracted state, the filling piece (116) is accommodated in the accommodating groove; when the filling piece (116) is in an expanded state, at least a portion of the filling piece (116) is released from the accommodating groove to squeeze the electrode (111) toward the tissue to be ablated; The suction positioning member (117) includes a suction inner wall (1171) and a suction outer wall (1172), a suction cavity (1173) is formed between the suction inner wall (1171) and the suction outer wall (1172), a first suction port (1174) and a second suction port (1175) communicated with the suction cavity (1173), the first suction port (1174) and the second suction port (1175) are oriented in the same direction, the suction inner wall (1171) and the suction outer wall (1172) are both U-shaped structures, the suction inner wall (1171) and the suction outer wall (1172) are arranged around the protective sheath (113), the opening structure is located at the opening of the U-shaped structure, and the first suction port (1174) and the second suction port (1175) are respectively located on both sides of the opening of the U-shaped structure; Shielding side eaves (115) are provided on opposite sides of the protective sheath (113), and the shielding side eaves (115) extend along the extension direction of the protective sheath (113).

2. The electrode assembly according to claim 1, wherein The protective sheath (113) is strip-shaped. There are a plurality of electrodes (111), and the plurality of electrodes (111) are arranged at intervals along the extension direction of the protective sheath (113); and / or There are a plurality of the suction positioning members (117), and the plurality of the suction positioning members (117) are arranged at intervals along the extension direction of the protective sheath (113).

3. The electrode assembly according to claim 1, wherein: The protective sheath (113) is strip-shaped. There are a plurality of fillers (116), and the plurality of fillers (116) are arranged at intervals along the extension direction of the protective sheath (113) and can be independently controlled; and / or The filling piece (116) is strip-shaped, and the filling piece (116) extends along the extension direction of the protective sheath (113).

4. The electrode assembly according to claim 1, wherein The suction positioning member (117) is a suction cup structure; and / or the filling member (116) is an airbag structure.

5. The electrode assembly according to claim 1, wherein: There are a plurality of electrodes (111), and the opening structure includes a plurality of avoidance openings, wherein the plurality of avoidance openings are arranged in a one-to-one correspondence with the plurality of electrodes (111), so that a portion of the structure of each electrode (111) extends to the outside of the protective sheath (113) through the corresponding avoidance opening; and / or There are multiple electrodes (111), the opening structure is a strip-shaped opening, the strip-shaped openings are spaced along the extension direction of the protective sheath (113), and partial structures of the multiple electrodes (111) extend to the outside of the protective sheath (113) through the strip-shaped openings.

6. The electrode assembly according to claim 1, wherein: The electrode assembly further comprises a first magnetic member (112), wherein the first magnetic member (112) is arranged in the protective sheath (113); a positioning groove for accommodating the filling member (116) is provided on the electrode (111) and / or the first magnetic member (112).

7. The electrode assembly according to claim 6, characterized in that There are a plurality of electrodes (111) and a plurality of first magnetic members (112), and the plurality of electrodes (111) and the plurality of first magnetic members (112) are arranged alternately in sequence along the extension direction of the protective sheath (113).

8. The electrode assembly according to claim 6, wherein: The electrode (111) and / or the first magnetic member (112) is provided with a wire laying groove (120) for accommodating a wire, and the wire is used to be connected to the electrode (111).

9. An ablation device comprising a first electrode assembly (100) and a second electrode assembly (200), characterized in that: The first electrode assembly (100) is the electrode assembly according to any one of claims 1 to 8, the electrode of the first electrode assembly (100) is a first electrode, the second electrode assembly (200) includes a second electrode tip (210), the second electrode tip (210) includes a second electrode (211), and the second electrode (211) is arranged opposite to the first electrode so as to ablate the tissue to be ablated located between the first electrode and the second electrode (211) through the first electrode and the second electrode (211).

10. 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 claim 9.

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