Split type electrode ablation device and pulse ablation equipment

Abstract

The invention relates to the technical field of ablation, in particular to a split type electrode ablation device and pulse ablation equipment, the split type electrode ablation device comprises a conveying catheter with a far end and a near end which are oppositely arranged, and the conveying catheter is provided with a containing cavity; the at least one group of split type electrode assemblies are arranged in the accommodating cavity at intervals, and each split type electrode assembly comprises at least two ablation electrodes; the at least two ablation electrodes are sequentially arranged in the axis direction of the conveying catheter; a pushing piece is arranged on the side, facing the near end of the conveying catheter, of each ablation electrode, and the pushing pieces can drive the ablation electrodes corresponding to the pushing pieces to move from the near end to the far end under the action of external force; by pushing the pushing pieces arranged on the different ablation electrodes, the corresponding number of ablation electrodes can be controlled to conduct pulse ablation on the to-be-ablated position, the effect of flexibly arranging the ablation depth is achieved, it is ensured that hidden or deep lesions are thoroughly ablated, and the flexibility and puncture precision of the ablation device are improved.

Description

Technical Field

[0001] The present application relates to the field of ablation technology, and in particular to a split-type electrode ablation device and a pulse ablation equipment. Background Art

[0002] The treatment of digestive tract diseases usually adopts ablation treatment methods. Ablation surgery usually uses a pulse ablation device to treat benign or malignant tumors in the digestive tract. The pulse ablation device mainly uses high temperature to cause tumor cells to denature or coagulate and necrotize, and can also achieve the effect of killing tumors.

[0003] At present, the pulse ablation devices that are more commonly used in clinical practice include circumferential ablation catheters, focal ablation catheters or basket-type ablation electrodes. First, circumferential ablation catheters are mainly used for relatively regular circular or annular lesions, but for those irregularly shaped flat lesions or deep lesions, this catheter cannot effectively fit, resulting in poor ablation effect. The ablation energy is difficult to penetrate into the tissue and cannot completely remove the lesions, which may increase the risk of recurrence. Secondly, the electrode area of ​​the focal ablation catheter is small, resulting in a limited range of action. It is often necessary to arrange the catheter position multiple times, which increases the complexity of the operation. The focal ablation catheter only acts on the surface or near-surface tissue. For deeper lesions or cancer in the digestive tract wall, the ablation effect is limited and sufficient treatment depth cannot be achieved. Furthermore, the basket-type ablation electrode has poor fit after deployment, especially in areas with irregular or convex cavity walls, which may lead to omissions in ablation or unsatisfactory effects. For stenotic or multi-complex structures of the digestive tract (such as the esophagus and gastrointestinal tract), the basket-type electrode is difficult to deploy, which limits the application of the device in these areas.

[0004] Based on the shortcomings of the existing technology, it is urgent to develop a split electrode ablation device and a pulse ablation device to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present application, by pushing the pushing members arranged on different ablation electrodes, can control a corresponding number of ablation electrodes to perform pulse ablation on the ablation position on the basis of ensuring the ablation area, thereby achieving the effect of flexibly arranging the ablation depth, ensuring that latent or deep lesions are completely ablated, and improving the flexibility of ablation electrode arrangement and the accuracy of puncture.

[0006] The present application provides a split-type electrode ablation device, comprising:

[0007] A delivery catheter having a distal end and a proximal end disposed oppositely, and having a receiving cavity;

[0008] At least one group of split electrode assemblies, the at least one group of split electrode assemblies are arranged in the accommodating cavity at intervals, the split electrode assembly comprises at least two ablation electrodes; along the axial direction of the delivery catheter, the at least two ablation electrodes are arranged in sequence;

[0009] A pushing member is provided on one side of each ablation electrode facing the proximal end of the delivery catheter. Under the action of an external force, the pushing member can drive the corresponding ablation electrode to move from the proximal end to the distal end.

[0010] Furthermore, at least one positioning structure is provided on the peripheral side of the ablation electrode, and the positioning structure can abut against the position to be ablated;

[0011] When the positioning structure abuts against the to-be-ablated position, the positioning structure can limit the movement of the ablation electrode toward the proximal end of the delivery catheter.

[0012] Furthermore, the positioning structure is an anti-detachment barb protruding from the outer side wall of the ablation electrode, and the anti-detachment barb is extended toward the proximal end of the delivery catheter.

[0013] Furthermore, the inner wall of the accommodating cavity is in contact with or spaced from the positioning structure.

[0014] Furthermore, along the distal end to the proximal end of the delivery catheter, the two ends of the ablation electrode are respectively a piercing tip and a positioning end;

[0015] The pushing member is arranged at the positioning end, and the positioning end can accommodate a part of the piercing tip of the ablation electrode adjacent thereto.

[0016] Furthermore, it also includes a negative pressure system, wherein the negative pressure system is sealedly connected to the proximal end of the delivery catheter;

[0017] The negative pressure system is used to adjust the air pressure of the accommodating chamber to negative pressure. When the air pressure in the accommodating chamber is negative pressure, the distal end of the delivery catheter can generate adsorption force.

[0018] Furthermore, an inductor component is provided on the delivery catheter;

[0019] When the inductor component is powered on, the inductor component generates an electromagnetic attraction, and the electromagnetic attraction generated by the inductor component can drive the ablation electrode located outside the delivery catheter to move toward the proximal end of the delivery catheter;

[0020] The inductive component also has an electromagnetic positioning function so as to accurately determine the position and direction of the inductive component during surgery.

[0021] Furthermore, the pushing member is a magnetic member, and the pushing member can be magnetically connected to the inductor component;

[0022] When the inductor component is energized, the inductor component drives the pushing member located outside the delivery catheter to move into the accommodating cavity.

[0023] Furthermore, the inductor component is an inductor coil, and the inductor coil is arranged on the side wall of the delivery catheter.

[0024] Further, the accommodating cavity includes a main cavity and at least two sub-cavities, and the at least two sub-cavities are arranged at intervals in the circumference of the main cavity and communicate with the main cavity;

[0025] The main cavity is used to allow the ablation electrode to pass through, and the pushers of each ablation electrode can move along the respective sub-cavities.

[0026] Furthermore, it also includes a driving device, which is drivingly connected to the pushing member and can drive the pushing member to move toward the distal end of the delivery catheter.

[0027] The present invention also protects a pulse ablation device, comprising an ablation mechanism and the split electrode ablation device as described above;

[0028] The ablation mechanism is connected to the split-type electrode ablation device, and the ablation mechanism is used to provide pulse energy to the split-type electrode ablation device.

[0029] Implementing the embodiments of the present application has the following beneficial effects:

[0030] The present application, by setting at least two ablation electrodes in the split electrode assembly as a split design, can ensure that the split electrode ablation device controls different groups and / or different numbers of ablation electrodes for ablation according to the shape and size of the lesion, thereby achieving flexible arrangement of the ablation electrodes, ensuring comprehensive coverage of the lesion area, and avoiding excessive damage to normal tissue; at the same time, by pushing the pushing members set on different ablation electrodes, it is possible to control the corresponding number of ablation electrodes to perform pulse ablation on the ablation position on the basis of ensuring the ablation area, thereby achieving the effect of flexible arrangement of the ablation depth, ensuring that hidden or deep lesions are completely ablated, and improving the flexibility of the ablation electrode arrangement and the accuracy of puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and a person of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

[0032] Figure 1 is a structural diagram of the split-type electrode ablation device at a first angle of this embodiment;

[0033] Figure 2 is a structural diagram of the split-type electrode ablation device at a second angle of this embodiment;

[0034] Figure 3 is a structural diagram of the split-type electrode ablation device at a third angle of this embodiment;

[0035] Figure 4 is a structural diagram of the split electrode assembly of this embodiment;

[0036] Figure 5 This is a structural diagram of the ablation electrode and the pusher after being connected in this embodiment;

[0037] Figure 6 This is a structural diagram of the delivery catheter of this embodiment.

[0038] Among them, the reference numerals in the figure correspond to:

[0039] 1-delivery catheter; 2-split electrode assembly; 11-first accommodating cavity; 12-second accommodating cavity; 13-inductor coil; 21-ablation electrode; 22-pushing member; 211-penetration tip; 212-positioning end; 213-positioning structure. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] 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 interchanged where appropriate, so that the embodiments of the present application described herein can 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.

[0042] See attached Figure 1-6The present embodiment provides a split electrode ablation device, comprising: a delivery catheter 1 having a distal end and a proximal end relatively arranged, and having a accommodating cavity; at least one group of split electrode assemblies 2, at least one group of split electrode assemblies 2 are arranged in the accommodating cavity at intervals, and the split electrode assembly 2 includes at least two ablation electrodes 21; along the axial direction of the delivery catheter 1, at least two ablation electrodes 21 are arranged in sequence; each ablation electrode 21 is provided with a pushing member 22 on the side facing the proximal end of the delivery catheter 1, and under the action of external force, the pushing member 22 can drive the corresponding ablation electrode 21 to move from the proximal end to the distal end.

[0043] In this embodiment, the pulse ablation device is mainly used for minimally invasive ablation treatment of gastrointestinal tumors. The delivery catheter 1 in the split electrode ablation device is extended into the digestive tract. Under the action of the negative pressure system, the distal end of the delivery catheter 1 is adsorbed to the ablation position. Under the action of external force, the pushing member 22 drives the corresponding ablation electrode 21 to move from the proximal end to the distal end until at least one ablation electrode 21 penetrates the ablation position, so as to achieve ablation of the position to be ablated by at least one ablation electrode 21.

[0044] Specifically, at least one ablation electrode 21 can emit pulses with a width of microseconds to the position to be ablated, so as to damage the stability of the membrane surface of the tissue cells at the ablation position, and cause multiple hydrophilic micropores to appear on the surface of the tissue cells at the ablation position, so as to destroy the homeostasis of the tissue cells at the ablation position, and finally cause the death of the tissue cells at the ablation position, thereby achieving the therapeutic effect of pulse ablation of the tissue at the ablation position.

[0045] It can be understood that tissue cells at different ablation locations have different destruction thresholds. By controlling the size of the pulse energy emitted by the ablation electrode 21, the pulse emitted by the ablation electrode 21 can be accurately directed to the lesion location, and the pulse ablation treatment has tissue cell selectivity; by controlling the size of the pulse energy emitted by the ablation electrode 21 corresponding to the tissue cells at the location to be ablated, the pulse only performs pulse ablation treatment on the tissue cells at the location to be ablated, and will not damage other tissue cells.

[0046] In the present embodiment, by setting at least two ablation electrodes 21 in the split electrode assembly as a split design, it is possible to ensure that the split electrode ablation device controls different groups and / or different numbers of ablation electrodes 21 for ablation according to the shape and size of the lesion, thereby enabling flexible arrangement of the ablation electrodes 21 to ensure comprehensive coverage of the lesion area and avoid excessive damage to normal tissues; at the same time, by pushing the pushing members 22 arranged on different ablation electrodes 21, it is possible to control a corresponding number of ablation electrodes 21 to perform pulse ablation on the ablation position on the basis of ensuring the ablation area, thereby achieving the effect of flexible arrangement of the ablation depth, ensuring that latent or deep lesions are completely ablated, and improving the flexibility of the arrangement of the ablation electrodes 21 and the accuracy of puncture.

[0047] In this embodiment, the split electrode ablation device includes at least two groups of split electrode assemblies 2, and the at least two groups of split electrode assemblies 2 are arranged at intervals in the accommodating cavity, and the at least two groups of split electrode assemblies 2 are isolated from each other by the internal structure of the accommodating cavity and its interior, so as to avoid interference between the at least two groups of split electrode assemblies 2 during operation. In this way, on the basis of increasing the ablation area of ​​the split electrode ablation device, the accuracy of the operation of the split electrode assembly 2 is further guaranteed, and the flexibility of the arrangement of the ablation electrode 21 and the accuracy of puncture are improved.

[0048] Specifically, it can be seen that the accommodating cavity is divided into a plurality of mutually isolated sub-cavities, and each group of split electrode assemblies 2 is arranged in one group of the above sub-cavities.

[0049] In some possible embodiments, the split electrode ablation device includes two groups of split electrode assemblies 2, and the corresponding accommodating cavity inside the delivery catheter 1 is set as two groups of sub-accommodating cavities corresponding to the two groups of split electrode assemblies 2, and a group of split electrode assemblies 2 is set in each group of sub-accommodating cavities.

[0050] In this embodiment, the split electrode ablation device includes a group of split electrode assemblies 2 , and the corresponding accommodating cavity inside the delivery catheter 1 is configured as a group of sub-accommodating cavities corresponding to the group of split electrode assemblies 2 .

[0051] Specifically, when the accommodating chamber includes one sub-accommodating chamber, the accommodating chamber and the sub-accommodating chamber structures are the same structure with different names; when the accommodating chamber includes at least two sub-accommodating chambers, each sub-accommodating chamber includes a main chamber 11 and at least two sub-chambers 12.

[0052] In some possible embodiments, the accommodating cavity includes a main cavity 11 and at least two sub-cavities 12, and the at least two sub-cavities 12 are arranged at intervals in the circumference of the main cavity 11 and are connected to the main cavity 11; the main cavity 11 is used to allow the ablation electrode 21 to pass through, and the pushing members 22 of each ablation electrode 21 can move along their respective sub-cavities 12. By dividing the accommodating cavity into the main cavity 11 and the sub-cavity 12, the moving channel of the ablation electrode 21 can be isolated from the moving channel of the pushing member 22 to avoid interference. At the same time, the ablation electrode 21 is separately arranged in the main cavity 11. To a certain extent, the diameter of the main cavity 11 can be prevented from being too large, which causes the ablation electrode 21 to shift when moving in the main cavity 11. Further, the main cavity 11 and the sub-cavity 12 are separately arranged, which can prevent the diameter of the main cavity 11 from being too large, which causes the ablation electrode 21 arranged therein to be easily shifted, thereby ensuring that the ablation electrode 21 is accurately moved to the position to be ablated, and ensuring the accuracy of the arrangement of the ablation electrode 21.

[0053] Specifically, at least two sub-cavities 12 are arranged at intervals in the circumference of the main cavity 11, and at least two sub-cavities 12 are connected through the main cavity 11, so that interference of the pusher 22 arranged in the sub-cavity 12 can be avoided, thereby ensuring the stability of the operation of the split electrode ablation device.

[0054] In this embodiment, the main cavity 11 and the secondary cavity 12 are arranged along the circumferential direction of the delivery catheter 1 and pass through both ends of the delivery catheter 1. The arrangement direction of the main cavity 11 and the arrangement direction of the secondary cavity 12 are both parallel to the axial direction of the delivery catheter 1.

[0055] In this embodiment, the split electrode assembly 2 includes at least two ablation electrodes 21, and the at least two ablation electrodes 21 are arranged in sequence to form a linear split electrode assembly 2. When the split electrode assembly 2 is in an initial state, adjacent ablation electrodes 21 are gap-set or abut-set, and the abutment setting of adjacent ablation electrodes 21 can be achieved by pushing the pushing member 22.

[0056] Specifically, the pushing members 22 on at least two ablation electrodes 21 are arranged at intervals to ensure that the pushing members 22 on at least two ablation electrodes 21 do not interfere with each other during the movement.

[0057] Specifically, the axis of each ablation electrode 21 coincides with the axis of the split electrode assembly 2 .

[0058] In this embodiment, the number and shape of the ablation electrodes 21 included in the split electrode assembly 2 are set according to actual conditions and are not limited here.

[0059] Preferably, the split electrode assembly 2 includes five ablation electrodes 21, which are columnar structures with a pointed end. The sub-accommodating cavity includes a main cavity 11 and five sub-cavities 12. The sub-cavities 12 are arranged in a one-to-one correspondence with the pushing members 22. The five ablation electrodes 21 are arranged in sequence to form a linear split electrode assembly 2. The five ablation electrodes 21 are all arranged in the main cavity 11, and the pushing members 22 arranged thereon are respectively arranged in their respective sub-cavities 12.

[0060] In some possible embodiments, at least one positioning structure 213 is provided on the circumferential side of the ablation electrode 21, and the positioning structure 213 can abut against the position to be ablated; when the positioning structure 213 abuts against the position to be ablated, the positioning structure 213 can limit the movement of the ablation electrode 21 toward the proximal end of the delivery catheter 1. By setting the positioning structure 213, the ablation electrode 21 can be positioned to avoid displacement of the ablation electrode 21 relative to the position to be ablated when the ablation electrode 21 is ablated, thereby ensuring the positioning accuracy of the ablation electrode 21 during ablation puncture, and also ensuring the puncture success rate of the split electrode ablation device.

[0061] In this embodiment, the number and specific structure of the positioning structures 213 are not limited, as long as they can limit the position of the ablation electrode 21 .

[0062] In this embodiment, at least one positioning structure 213 is arranged at intervals around the circumference of the ablation electrode 21 , and at least one circle of the positioning structure 213 is formed on the side wall of the ablation electrode 21 .

[0063] Preferably, at least one positioning structure 213 is arranged at intervals around the circumference of the ablation electrode 21 , forming two circles of positioning structures 213 on the side wall of the ablation electrode 21 .

[0064] In some possible embodiments, the positioning structure 213 is an anti-detachment barb protruding from the outer wall of the ablation electrode 21, and the anti-detachment barb is extended toward the proximal end of the delivery catheter 1. By setting the anti-detachment barb, the positioning structure 213 can be simplified on the basis of ensuring the positioning of the ablation electrode 21 and the position to be ablated, the positioning operation can be simplified, and the preparation cost can be reduced.

[0065] In this embodiment, the positioning structure 213 is integrally arranged with the delivery catheter 1 or the positioning structure 213 is clamped on the delivery catheter 1, and the end surface of the anti-detachment barb away from the delivery catheter 1 is a slope; along the proximal end to the distal end of the delivery catheter 1, the distance between the slope and the delivery catheter 1 gradually decreases.

[0066] In some possible embodiments, the inner wall of the accommodating cavity 11 abuts against the positioning structure 213 or a gap is set. When the inner wall of the accommodating cavity 11 abuts against the positioning structure 213, the ablation electrode 21 set in the accommodating cavity 11 can be prevented from shifting, and the positioning accuracy of the ablation electrode 21 during ablation is further ensured, thereby ensuring the puncture success rate of the split electrode ablation device; when the inner wall of the accommodating cavity 11 and the positioning structure 213 are set with a gap, the smoothness of pushing the ablation electrode 21 can be ensured, the positioning of the ablation electrode 21 is accelerated, and the puncture time is shortened.

[0067] In some possible embodiments, the positioning structures 213 on the delivery catheter 1 are evenly spaced, and a receiving groove corresponding to the above-mentioned positioning structure 213 is provided on the inner wall of the main cavity 11, and the receiving groove is provided along the axial direction of the delivery catheter 1. By providing a receiving groove for accommodating the positioning structure 213, the ablation electrode 21 is further prevented from shifting when moving in the delivery catheter 1, and the positioning accuracy of the ablation electrode 21 during ablation puncture is further guaranteed, and the puncture success rate of the split electrode ablation device can also be guaranteed.

[0068] In some possible embodiments, along the distal end to the proximal end of the delivery catheter 1, the two ends of the ablation electrode 21 are respectively a penetration tip 211 and a positioning end 212; the pushing member 22 is arranged at the positioning end 212, and the positioning end 212 can accommodate part of the penetration tip 211 of the ablation electrode 21 adjacent thereto, so as to ensure that the ablation electrode 21 provided with the penetration tip 211 can penetrate into the position to be ablated, thereby ensuring the positioning accuracy of the ablation electrode 21 during ablation, and at the same time, the pushing member 22 is arranged at the positioning end 212, so as to avoid interference between the pushing member 22 and the corresponding ablation electrode 21, thereby ensuring the stability of the operation of the ablation electrode 21.

[0069] In this embodiment, the length of the insertion tip 211 accounts for 40%-60% of the length of the ablation electrode 21 . Along the direction from the proximal end to the distal end of the delivery catheter 1 , the shape of the insertion tip 211 is conical or pyramidal.

[0070] In this embodiment, a positioning hole is provided on the positioning end 212 , and the axis of the positioning hole coincides with the axis of the ablation electrode 21 . The diameter of the positioning hole is not limited, as long as the positioning hole can accommodate the adjacent portion of the piercing tip 211 .

[0071] In this embodiment, the pushing member 22 is disposed at the positioning end 212 , and the pushing member 22 extends toward the proximal end of the delivery catheter 1 .

[0072] In this embodiment, the length of the pushing member 22 is not limited, as long as the driving device can push the pushing member 22 . Preferably, the length of the pushing member 22 is slightly longer than the length of the ablation electrode 21 .

[0073] Preferably, the pushing member 22 is a pushing rod, and the shape of the pushing rod is not limited, as long as it is ensured that it will not interfere with the adjacent ablation electrode 21 .

[0074] In this embodiment, one end of the push rod is fixedly set at the positioning end 212, and the connection position between the push rod and the positioning end 212 is located on the circumferential side of the positioning hole, and along the direction from the distal end to the proximal end of the delivery catheter 1, the distance between the push rod and the axis of the delivery catheter 1 gradually increases to avoid interference between the push rod and the insertion tip 211 of the adjacent ablation electrode 21.

[0075] In some possible embodiments, a negative pressure system is also included, which is sealed and connected to the proximal end of the delivery catheter 1; the negative pressure system is used to adjust the air pressure in the accommodating chamber to negative pressure. When the air pressure in the accommodating chamber is negative pressure, the distal end of the delivery catheter 1 can generate an adsorption force. By setting up the negative pressure system, it can be ensured that before the ablation electrode 21 is arranged at the position to be ablated, the delivery catheter 1 is subjected to negative pressure treatment by the negative pressure system, so that the distal end of the delivery catheter 1 can be adsorbed on the surface of the position to be ablated, thereby ensuring the positioning accuracy of the arranged ablation electrode 21, which can further improve the puncture success rate of the split electrode ablation device, and can also shorten the positioning time, thereby reducing the patient's operation time, and can also reduce damage to surrounding tissues during the operation, thereby improving the safety of the split electrode ablation device.

[0076] In this embodiment, the negative pressure system is disposed on the side wall of the delivery catheter 1 or the proximal end of the delivery catheter 1 .

[0077] In this embodiment, the specific structure of the negative pressure system is not limited, as long as the negative pressure system can adjust the pressure in the accommodating cavity of the delivery catheter 1 to a negative pressure.

[0078] In some possible embodiments, an inductor component 13 is provided on the delivery catheter 1; when the inductor component 13 is energized, the inductor component 13 generates electromagnetic attraction, and the electromagnetic attraction generated by the inductor component 13 can drive the ablation electrode 21 located outside the delivery catheter 1 to move toward the proximal end of the delivery catheter 1; the inductor component 13 also has an electromagnetic positioning function, so as to accurately determine the position and direction of the inductor component 13 during the operation. By arranging the inductor component 13 on the delivery catheter 1, the electromagnetic attraction generated by the inductor component 13 when energized can act on the ablation electrode 21, thereby driving the ablation electrode 21 inserted into the position to be ablated to be sucked back into the delivery catheter 1, thereby ensuring the safe removal of the ablation electrode 21 inserted into the position to be ablated, avoiding foreign matter remaining in the body after the operation, and thereby improving the safety of the split electrode ablation device.

[0079] In this embodiment, at least one of the delivery catheter 1 and the ablation electrode 21 is made of a developing material, so that the puncture and ablation position can be visually penetrated and the success rate of the puncture is improved.

[0080] In some possible embodiments, the pushing member 22 is a magnetic member, and the pushing member 22 can be magnetically connected to the inductance component 13; when the inductance component 13 is energized, the inductance component 13 drives the pushing member 22 located outside the delivery catheter 1 to move into the accommodating cavity. By setting the pushing member 22 as a magnetic member, it can be ensured that the magnetic force generated by the inductance component 13 acts on the pushing member 22, so that the pushing member 22 drives the ablation electrode 21 fixedly connected to it to move toward the inside of the accommodating cavity, thereby ensuring the safe removal of the ablation electrode inserted into the ablation position.

[0081] In this embodiment, the inductor component 13 is a device that can generate magnetic force when powered on. Its specific structure is set according to actual conditions and is not limited here.

[0082] In some possible embodiments, the inductance component 13 is an inductance coil, which is arranged on the side wall of the delivery catheter 1. By setting the inductance component 13 as an inductance coil and fixing the inductance coil in the side wall of the delivery catheter 1, the supporting capacity of the delivery catheter 1 can be improved, ensuring that the delivery catheter 1 will not be deformed when it is under negative pressure, thereby ensuring the accuracy of the arrangement of the ablation electrode 21 and the structural stability of the delivery catheter 1, and to a certain extent, the service life of the delivery catheter 1 can be improved and the use cost can be reduced.

[0083] In this embodiment, along the length direction of the delivery catheter 1 , the arrangement length of the inductor coil is 50%-100% of the length of the delivery catheter 1 .

[0084] Preferably, the arrangement length of the inductive coil is equal to the length of the delivery catheter 1, so that the magnetic force provided by the inductive coil can be increased.

[0085] In some possible embodiments, a driving device is further included, which is drivably connected to the pushing member 22. The driving device can drive the pushing member 22 to move toward the distal end of the delivery catheter 1. By setting the driving device, the pushing member can be driven to move, thereby driving the ablation electrode 21 to move toward the distal end of the delivery catheter 1.

[0086] In this embodiment, the driving device includes at least one driving end, and the driving end is drivingly connected to the pushing member 22 .

[0087] Preferably, the driving device includes a driving end, and the driving end can be drivingly connected to the pushing members 22 arranged in different auxiliary chambers 12 respectively.

[0088] In some other possible embodiments, the driving device includes a plurality of driving ends, and the number of the driving ends is consistent with the number of the pushing members 22 , that is, one driving end drives a corresponding pushing member 22 to move toward the distal end of the delivery catheter 1 .

[0089] The present invention also protects a pulse ablation device, including an ablation mechanism and a split-electrode ablation device as described above; the ablation mechanism is connected to the split-electrode ablation device, the ablation mechanism is used to provide pulse energy to the split-electrode ablation device, the ablation mechanism is electrically connected to the ablation electrode 21 and the inductor component 13 respectively, the ablation mechanism is a pulse energy generating device, which transmits pulse energy to the ablation electrode 21 for ablation, and also provides the required current to the inductor component 13; during the ablation process, the ablation mechanism is mainly used for the transmission of pulse energy; after the ablation is completed, the ablation mechanism switches to the electromagnetic mode, energizes the electromagnetic coil, activates the electromagnet function, turns the pusher 22 into an electromagnet, and completes the recovery and removal of the ablation electrode 21; in this embodiment, By setting at least two ablation electrodes 21 in the split electrode assembly as a split design, it is possible to ensure that the split electrode ablation device controls different groups and / or different numbers of ablation electrodes 21 for ablation according to the shape and size of the lesion, so that the ablation electrodes 21 can be flexibly arranged to ensure comprehensive coverage of the lesion area and avoid excessive damage to normal tissue; at the same time, by pushing the pushing members 22 set on different ablation electrodes 21, it is possible to control the corresponding number of ablation electrodes 21 to perform pulse ablation on the ablation position on the basis of ensuring the ablation area, thereby achieving the effect of flexibly arranging the ablation depth, ensuring that hidden or deep lesions are completely ablated, and improving the flexibility of ablation electrode arrangement and the accuracy of puncture.

[0090] The working process of the pulse ablation equipment is as follows: the split electrode ablation device is inserted into the digestive tract, the distal end of the delivery catheter 1 is controlled to move to the position to be ablated, and the negative pressure system is controlled to perform negative pressure treatment on the accommodating cavity of the delivery catheter 1, so that the distal end of the delivery catheter 1 is adsorbed to the position to be ablated, and the driving device drives the pushing member 22 to make the ablation electrode 21 penetrate into the position to be ablated, and the ablation mechanism provides ablation energy to the ablation electrode 21 to achieve pulse ablation of the position to be ablated. After the puncture ablation is completed, the ablation mechanism provides the required current to the inductor component 13, and the inductor component 13 arranged on the side wall of the delivery catheter 1 generates a magnetic attraction force, and the pushing member 22 on the ablation electrode 21 penetrated into the position to be ablated is magnetically adsorbed, driving the ablation electrode 21 penetrated into the position to be ablated to be sucked back into the delivery catheter 1, and the ablation electrode 21 penetrated into the position to be ablated is safely removed, and the delivery catheter 1 is controlled to move out of the digestive tract, thus completing the ablation process.

[0091] Embodiment 1

[0092] See attached Figure 1-6The present embodiment provides a split electrode ablation device, comprising: a delivery catheter 1 having a distal end and a proximal end relatively arranged, and having a accommodating cavity; at least one group of split electrode assemblies 2, at least one group of split electrode assemblies 2 are arranged in the accommodating cavity at intervals, and the split electrode assembly 2 includes at least two ablation electrodes 21; along the axial direction of the delivery catheter 1, at least two ablation electrodes 21 are arranged in sequence; each ablation electrode 21 is provided with a pushing member 22 on the side facing the proximal end of the delivery catheter 1, and under the action of external force, the pushing member 22 can drive the corresponding ablation electrode 21 to move from the proximal end to the distal end.

[0093] In this embodiment, the pulse ablation device is mainly used for minimally invasive ablation treatment of gastrointestinal tumors. The delivery catheter 1 in the split electrode ablation device is extended into the digestive tract. Under the action of the negative pressure system, the distal end of the delivery catheter 1 is adsorbed to the ablation position. Under the action of external force, the pushing member 22 drives the corresponding ablation electrode 21 to move from the proximal end to the distal end until at least one ablation electrode 21 penetrates the ablation position, so as to achieve ablation of the position to be ablated by at least one ablation electrode 21.

[0094] In this embodiment, the split electrode ablation device also includes a negative pressure system, which is sealed and connected to the proximal end of the delivery catheter 1; the negative pressure system is used to adjust the air pressure in the accommodating chamber to negative pressure. When the air pressure in the accommodating chamber is negative pressure, the distal end of the delivery catheter 1 can generate adsorption force.

[0095] In this embodiment, the negative pressure system is disposed on the side wall of the delivery catheter 1 or the proximal end of the delivery catheter 1 .

[0096] In this embodiment, the specific structure of the negative pressure system is not limited, as long as the negative pressure system can adjust the pressure in the accommodating cavity of the delivery catheter 1 to a negative pressure.

[0097] In this embodiment, an inductance component 13 is provided on the delivery catheter 1; when the inductance component 13 is energized, the inductance component 13 generates an electromagnetic attraction, and the electromagnetic attraction generated by the inductance component 13 can drive the ablation electrode 21 located outside the delivery catheter 1 to move toward the proximal end of the delivery catheter 1; the inductance component 13 also has an electromagnetic positioning function, so as to accurately determine the position and direction of the inductance component 13 during the operation.

[0098] In this embodiment, the pusher 22 is a magnetic member, and the pusher 22 can be magnetically connected to the inductor component 13; when the inductor component 13 is energized, the inductor component 13 drives the pusher 22 located outside the delivery catheter 1 to move into the accommodating cavity.

[0099] In this embodiment, the inductor component 13 is an inductor coil, and the inductor coil is arranged on the side wall of the delivery catheter 1 .

[0100] In this embodiment, along the length direction of the delivery catheter 1 , the arrangement length of the inductor coil is 50%-100% of the length of the delivery catheter 1 .

[0101] Preferably, the arrangement length of the inductive coil is equal to the length of the delivery catheter 1, so that the magnetic force provided by the inductive coil can be increased.

[0102] In this embodiment, the split electrode ablation device further includes a driving device, which is drivingly connected to the pushing member 22 , and the driving device can drive the pushing member 22 to move toward the distal end of the delivery catheter 1 .

[0103] In this embodiment, the driving device includes at least one driving end, and the driving end is drivingly connected to the pushing member 22 .

[0104] Preferably, the driving device includes a driving end, and the driving end can be drivingly connected to the pushing members 22 arranged in different auxiliary chambers 12 respectively.

[0105] In this embodiment, the accommodating cavity includes a main cavity 11 and at least two sub-cavities 12. The at least two sub-cavities 12 are arranged at intervals in the circumference of the main cavity 11 and are connected to the main cavity 11. The main cavity 11 is used to allow the ablation electrode 21 to pass through, and the pushing members 22 of each ablation electrode 21 can move along their respective sub-cavities 12.

[0106] Specifically, in the case where the accommodating cavity includes a sub-accommodating cavity, the accommodating cavity and the sub-accommodating cavity structures are the same structure with different names, and the sub-accommodating cavity includes a main cavity 11 and at least two sub-cavities 12, and the at least two sub-cavities 12 are arranged at intervals in the circumference of the main cavity 11, and at least two sub-cavities 12 are connected through the main cavity 11, so that interference with the pushing member 22 arranged in the sub-cavity 12 can be avoided, thereby ensuring the stability of the operation of the split electrode ablation device.

[0107] In this embodiment, the main cavity 11 and the secondary cavity 12 are arranged along the circumferential direction of the delivery catheter 1 and pass through both ends of the delivery catheter 1. The arrangement direction of the main cavity 11 and the arrangement direction of the secondary cavity 12 are both parallel to the axial direction of the delivery catheter 1.

[0108] In this embodiment, the split electrode ablation device includes a group of split electrode assemblies 2 , and the corresponding accommodating cavity inside the delivery catheter 1 is configured as a group of sub-accommodating cavities corresponding to the group of split electrode assemblies 2 .

[0109] In this embodiment, the split electrode assembly 2 includes at least two ablation electrodes 21, and the at least two ablation electrodes 21 are arranged in sequence to form a linear split electrode assembly 2. When the split electrode assembly 2 is in an initial state, adjacent ablation electrodes 21 are gap-set or abut-set. The adjacent ablation electrodes 21 can be abutted against each other by pushing the pushing member 22, and the inner wall of the accommodating cavity is abutted against the positioning structure 213.

[0110] Specifically, the pushing members 22 on at least two ablation electrodes 21 are arranged at intervals to ensure that the pushing members 22 on at least two ablation electrodes 21 do not interfere with each other during the movement.

[0111] Specifically, the axis of each ablation electrode 21 coincides with the axis of the split electrode assembly 2 .

[0112] In this embodiment, the number and shape of the ablation electrodes 21 included in the split electrode assembly 2 are set according to actual conditions and are not limited here.

[0113] Preferably, the split electrode assembly 2 includes five ablation electrodes 21, which are columnar structures with a pointed end. The sub-accommodating cavity includes a main cavity 11 and five sub-cavities 12. The sub-cavities 12 are arranged in a one-to-one correspondence with the pushing members 22. The five ablation electrodes 21 are arranged in sequence to form a linear split electrode assembly 2. The five ablation electrodes 21 are all arranged in the main cavity 11, and the pushing members 22 arranged thereon are respectively arranged in their respective sub-cavities 12.

[0114] In this embodiment, at least one positioning structure 213 is provided on the circumferential side of the ablation electrode 21, and the positioning structure 213 can abut against the position to be ablated; when the positioning structure 213 abuts against the position to be ablated, the positioning structure 213 can limit the movement of the ablation electrode 21 toward the proximal end of the delivery catheter 1.

[0115] In this embodiment, the number and specific structure of the positioning structures 213 are not limited, as long as they can limit the position of the ablation electrode 21 .

[0116] In this embodiment, at least one positioning structure 213 is arranged at intervals around the circumference of the ablation electrode 21 , and at least one circle of the positioning structure 213 is formed on the side wall of the ablation electrode 21 .

[0117] Preferably, at least one positioning structure 213 is arranged at intervals around the circumference of the ablation electrode 21 , forming two circles of positioning structures 213 on the side wall of the ablation electrode 21 .

[0118] In this embodiment, the positioning structure 213 is an anti-detachment barb protruding from the outer side wall of the ablation electrode 21 , and the anti-detachment barb is extended toward the proximal end of the delivery catheter 1 .

[0119] In this embodiment, the positioning structure 213 is integrally arranged with the delivery catheter 1 or the positioning structure 213 is clamped on the delivery catheter 1, and the end surface of the anti-detachment barb away from the delivery catheter 1 is a slope; along the proximal end to the distal end of the delivery catheter 1, the distance between the slope and the delivery catheter 1 gradually decreases.

[0120] In this embodiment, along the distal end to the proximal end of the delivery catheter 1, the two ends of the ablation electrode 21 are respectively a penetration tip 211 and a positioning end 212; the pusher 22 is arranged at the positioning end 212, and the positioning end 212 can accommodate part of the penetration tip 211 of the ablation electrode 21 adjacent thereto.

[0121] In this embodiment, the length of the insertion tip 211 accounts for 40%-60% of the length of the ablation electrode 21 . Along the direction from the proximal end to the distal end of the delivery catheter 1 , the shape of the insertion tip 211 is conical or pyramidal.

[0122] In this embodiment, a positioning hole is provided on the positioning end 212 , and the axis of the positioning hole coincides with the axis of the ablation electrode 21 . The diameter of the positioning hole is not limited, as long as the positioning hole can accommodate the adjacent portion of the piercing tip 211 .

[0123] In this embodiment, the pushing member 22 is disposed at the positioning end 212 , and the pushing member 22 extends toward the proximal end of the delivery catheter 1 .

[0124] In this embodiment, the length of the pushing member 22 is not limited, as long as the driving device can push the pushing member 22 . Preferably, the length of the pushing member 22 is slightly longer than the length of the ablation electrode 21 .

[0125] Preferably, the pushing member 22 is a pushing rod, and the shape of the pushing rod is not limited, as long as it is ensured that it will not interfere with the adjacent ablation electrode 21 .

[0126] In this embodiment, one end of the push rod is fixedly disposed at the positioning end 212, and the connection position between the push rod and the positioning end 212 is located on the peripheral side of the positioning hole, and along the direction from the distal end to the proximal end of the delivery catheter 1, the distance between the push rod and the axis of the delivery catheter 1 gradually increases.

[0127] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

[0128] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0129] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A split electrode ablation device, characterized in that: include: A delivery catheter (1) having a distal end and a proximal end disposed opposite to each other, and having a receiving cavity; At least one group of split electrode assemblies (2), the at least one group of split electrode assemblies (2) being arranged in the accommodating cavity at intervals, the split electrode assembly (2) comprising at least two ablation electrodes (21); along the axial direction of the delivery catheter (1), the at least two ablation electrodes (21) are arranged in sequence; A pushing member (22) is provided on the side of each ablation electrode (21) facing the proximal end of the delivery catheter (1); under the action of an external force, the pushing member (22) can drive the corresponding ablation electrode (21) to move from the proximal end to the distal end.

2. The split electrode ablation device according to claim 1, characterized in that: At least one positioning structure (213) is provided on the circumferential side of the ablation electrode (21), and the positioning structure (213) can abut against a position to be ablated; When the positioning structure (213) abuts against the position to be ablated, the positioning structure (213) can limit the movement of the ablation electrode (21) toward the proximal end of the delivery catheter (1).

3. The split electrode ablation device according to claim 2, characterized in that: The positioning structure (213) is an anti-detachment barb protruding from the outer side wall of the ablation electrode (21), and the anti-detachment barb is extended toward the proximal end of the delivery catheter (1).

4. The split electrode ablation device according to claim 2, characterized in that: The inner wall of the accommodating cavity is in contact with or spaced from the positioning structure (213).

5. The split electrode ablation device according to claim 1, characterized in that: Along the distal end to the proximal end of the delivery catheter (1), the two ends of the ablation electrode (21) are respectively a piercing tip (211) and a positioning end (212); The pushing member (22) is arranged at the positioning end (212), and the positioning end (212) is capable of accommodating a portion of the piercing tip (211) of the ablation electrode (21) adjacent thereto.

6. The split electrode ablation device according to any one of claims 1 to 5, characterized in that: It also includes a negative pressure system, which is sealed and connected to the proximal end of the delivery catheter (1); The negative pressure system is used to adjust the air pressure of the accommodating chamber to negative pressure. When the air pressure in the accommodating chamber is negative pressure, the distal end of the delivery catheter (1) can generate adsorption force.

7. The split electrode ablation device according to any one of claims 1 to 5, characterized in that: The delivery catheter (1) is provided with an inductor component (13); When the inductor component (13) is powered on, the inductor component (13) generates an electromagnetic attraction force, and the electromagnetic attraction force generated by the inductor component (13) can drive the ablation electrode (21) located outside the delivery catheter (1) to move toward the proximal end of the delivery catheter (1); The inductive component (13) also has an electromagnetic positioning function so as to accurately determine the position and direction of the inductive component (13) during surgery.

8. The split electrode ablation device according to claim 7, characterized in that: The pushing member (22) is a magnetic member, and the pushing member (22) can be magnetically connected to the inductor component (13); When the inductor component (13) is energized, the inductor component (13) drives the pushing member (22) located outside the delivery conduit (1) to move into the accommodating cavity.

9. The split electrode ablation device according to claim 7, characterized in that: The inductor component (13) is an inductor coil, and the inductor coil is arranged on the side wall of the delivery catheter (1).

10. The split electrode ablation device according to any one of claims 1 to 5, characterized in that: The accommodating chamber comprises a main chamber (11) and at least two auxiliary chambers (12), wherein the at least two auxiliary chambers (12) are arranged at intervals in the circumference of the main chamber (11) and are in communication with the main chamber (11); The main cavity (11) is used to allow the ablation electrode (21) to pass through, and the pusher (22) of each ablation electrode (21) can move along its own sub-cavity (12).

11. The split electrode ablation device according to any one of claims 1 to 5, characterized in that: It also comprises a driving device, which is drivingly connected to the pushing member (22), and can drive the pushing member (22) to move toward the distal end of the delivery catheter (1).

12. A pulse ablation device, characterized in that: It comprises an ablation mechanism and a split-electrode ablation device as claimed in any one of claims 1 to 11; The ablation mechanism is connected to the split-type electrode ablation device, and the ablation mechanism is used to provide pulse energy to the split-type electrode ablation device.

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