A split-type electrode ablation device and pulse ablation equipment

Abstract

This application relates to the field of ablation technology, specifically a split-type electrode ablation device and a pulse ablation device. The split-type electrode ablation device includes a delivery catheter with a distal and proximal end arranged opposite each other, and a receiving cavity; at least one set of split-type electrode assemblies, which are spaced apart within the receiving cavity, and each split-type electrode assembly includes at least two ablation electrodes; at least two ablation electrodes are arranged sequentially along the axial direction of the delivery catheter; each ablation electrode has a pushing member on the side facing the proximal end of the delivery catheter, which, under the action of external force, can drive the corresponding ablation electrode to move from the proximal end to the distal end; by pushing the pushing members arranged on different ablation electrodes, this application can control the corresponding number of ablation electrodes to perform pulse ablation on the ablation site, achieving the effect of flexibly arranging the ablation depth, ensuring thorough ablation of occult or deep lesions, and improving its flexibility and puncture accuracy.

Description

Technical Field

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

[0002] Ablation is a common treatment method for digestive tract diseases. Ablation surgery usually uses pulse ablation devices to treat benign or malignant tumors in the digestive tract. Pulse ablation devices mainly use high temperatures to denature or coagulate and die tumor cells, which can also achieve the effect of killing tumors.

[0003] Currently, the most commonly used pulsed ablation devices in clinical practice include circumferential ablation catheters, focal ablation catheters, and basket-type ablation electrodes. Firstly, circumferential ablation catheters are primarily designed for relatively regular circular or ring-shaped lesions. However, for irregularly shaped, flat lesions or deep lesions, these catheters cannot effectively adhere, resulting in poor ablation effects. The ablation energy cannot penetrate deeply into the tissue, failing to completely remove the lesion and potentially increasing the risk of recurrence. Secondly, focal ablation catheters have a small electrode area, limiting their effective range and often requiring multiple catheter placements, increasing the complexity of the procedure. The use of basket-type ablation catheters prolongs the operation time and increases trauma to the patient. Furthermore, the focal ablation catheter only acts on the surface or near the surface of the tissue, and its ablation effect is limited for deeper lesions or cancers within the digestive tract wall, failing to reach sufficient treatment depth. Moreover, the fit of the basket-type ablation electrode after deployment is poor, especially in areas with irregular or convex cavities, which may lead to missed ablation or unsatisfactory results. For lesions in narrow or complex digestive tract areas (such as the esophagus and gastrointestinal tract), the basket-type electrode is difficult to deploy, limiting the application of the device in these areas.

[0004] Given the shortcomings of existing technologies, there is an urgent need to research a split-type electrode ablation device and a pulse ablation device to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical issues, this application utilizes a pusher mechanism positioned on different ablation electrodes to control the corresponding number of ablation electrodes for pulsed ablation of the target location while ensuring the ablation area. This achieves flexible arrangement of ablation depths, ensuring thorough ablation of occult or deep lesions and improving the flexibility of ablation electrode placement and puncture accuracy.

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

[0007] A delivery conduit with a distal and proximal end positioned opposite each other, having a receiving cavity;

[0008] At least one set of split electrode assemblies is provided, the at least one set of split electrode assemblies being spaced apart within the receiving cavity, the split electrode assembly including at least two ablation electrodes; the at least two ablation electrodes are arranged sequentially along the axial direction of the delivery conduit;

[0009] Each of the ablation electrodes is provided with a pushing member on the side facing the proximal end of the delivery conduit. Under the action of 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 periphery of the ablation electrode, and the positioning structure can abut against the position to be ablated.

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

[0012] Furthermore, the positioning structure is a barb protruding from the outer wall of the ablation electrode to prevent detachment, and the barb extends towards the proximal end of the delivery conduit.

[0013] Furthermore, the inner wall of the receiving cavity abuts against or is spaced apart from the positioning structure.

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

[0015] The pusher is disposed at the positioning end, which is capable of accommodating a portion of the insertion tip of the ablation electrode adjacent to it.

[0016] Furthermore, it also includes a negative pressure system, which is in sealed communication with the proximal end of the delivery conduit;

[0017] The negative pressure system is used to adjust the air pressure in the receiving cavity to a negative pressure. When the air pressure in the receiving cavity is negative, the distal end of the delivery conduit can generate an adsorption force.

[0018] Furthermore, an inductor assembly is provided on the delivery conduit;

[0019] When the inductor is energized, the inductor generates an electromagnetic attraction force, which can drive the ablation electrode located outside the delivery conduit to move toward the proximal end of the delivery conduit.

[0020] The inductor component also has an electromagnetic positioning function, which enables precise determination of the position and orientation of the inductor component during surgery.

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

[0022] When the inductor is energized, the inductor drives the pusher located outside the delivery conduit to move into the receiving cavity.

[0023] Furthermore, the inductor component is an inductor coil, which is disposed on the side wall of the delivery conduit.

[0024] Furthermore, the receiving cavity includes a main cavity and at least two secondary cavities, the at least two secondary cavities being spaced apart in the circumferential direction of the main cavity and communicating with the main cavity;

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

[0026] Furthermore, it also includes a driving device, which is driven connected to the pusher and is capable of driving the pusher to move toward the distal end of the delivery conduit.

[0027] This invention also protects a pulse ablation device, including an ablation mechanism and a 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 this application has the following beneficial effects:

[0030] This application, by designing at least two ablation electrodes in a split electrode assembly as separate units, ensures that the split electrode ablation device can control different groups and / or different numbers of ablation electrodes for ablation according to the shape and size of the lesion. This allows for flexible arrangement of the ablation electrodes, ensuring full coverage of the lesion area and avoiding excessive damage to normal tissue. At the same time, by pushing the pusher set on different ablation electrodes, it is possible to control the corresponding number of ablation electrodes to perform pulse ablation on the ablation site while ensuring the ablation area, achieving the effect of flexible arrangement of ablation depth, ensuring thorough ablation of occult or deep lesions, and improving the flexibility of ablation electrode arrangement and puncture accuracy. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

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

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

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

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

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

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

[0038] The corresponding reference numerals in the figure are as follows:

[0039] 1-Delivery conduit; 2-Separate electrode assembly; 11-First receiving cavity; 12-Second receiving cavity; 13-Inductor coil; 21-Ablation electrode; 22-Pushing element; 211-Insertion tip; 212-Positioning end; 213-Positioning structure. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] See appendix Figure 1-6This embodiment provides a split-type electrode ablation device, including: a delivery conduit 1 having a distal end and a proximal end arranged opposite to each other, and having a receiving cavity; at least one set of split-type electrode assemblies 2, the at least one set of split-type electrode assemblies 2 being spaced apart in the receiving cavity, the split-type electrode assembly 2 including at least two ablation electrodes 21; at least two ablation electrodes 21 being arranged sequentially along the axial direction of the delivery conduit 1; each ablation electrode 21 having a pushing member 22 on the side facing the proximal end of the delivery conduit 1, the pushing member 22 being able to drive the corresponding ablation electrode 21 to move from the proximal end to the distal end under the action of external force.

[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 extends into the gastrointestinal tract. Under the action of the negative pressure system, the distal end of the delivery catheter 1 is attracted to the ablation position. Under the action of external force, the pusher 22 drives the corresponding ablation electrode 21 to move from the proximal end to the distal end, until at least one ablation electrode 21 is inserted into the ablation position, so as to realize that at least one ablation electrode 21 ablates the position to be ablated.

[0044] Specifically, at least one ablation electrode 21 can emit a pulse with a width on the order of microseconds to the ablation site, thereby damaging the stability of the cell membrane surface at the ablation site and causing multiple hydrophilic micropores to appear on the cell surface at the ablation site, thus disrupting the homeostasis of the cell at the ablation site and causing the cell at the ablation site to die, thereby achieving the therapeutic effect of pulse ablation of the ablation site.

[0045] It is understandable that tissue cells at different ablation sites have different destruction thresholds. By controlling the pulse energy emitted by the ablation electrode 21, the pulse emitted by the ablation electrode 21 can be precisely targeted at the lesion site, and the pulse ablation treatment has tissue cell selectivity. By controlling the pulse energy emitted by the ablation electrode 21 corresponding to the tissue cells at the ablation site, the pulse will only perform pulse ablation treatment on the tissue cells at the ablation site without damaging other tissue cells.

[0046] 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 to ablate according to the shape and size of the lesion. This enables flexible arrangement of the ablation electrodes 21, ensuring full coverage of the lesion area and avoiding excessive damage to normal tissue. At the same time, by pushing the pusher 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 site while ensuring the ablation area, achieving the effect of flexible arrangement of ablation depth, ensuring thorough ablation of occult or deep lesions, and improving the flexibility of ablation electrode 21 arrangement and puncture accuracy.

[0047] In this embodiment, the split-type electrode ablation device includes at least two sets of split-type electrode assemblies 2, which are spaced apart in the receiving cavity. The at least two sets of split-type electrode assemblies 2 are isolated from each other by the internal structure of the receiving cavity and its interior, thus avoiding interference between the at least two sets of split-type electrode assemblies 2 during operation. In this way, while increasing the ablation area of ​​the split-type electrode ablation device, the accuracy of the operation of the split-type electrode assemblies 2 is further guaranteed, and the flexibility of the ablation electrode 21 arrangement and the accuracy of puncture are improved.

[0048] Specifically, the accommodating cavity is divided into multiple sets of mutually isolated sub-cavities, and each set of three-dimensional electrode assembly 2 is disposed in one of the aforementioned sub-cavities.

[0049] In some possible embodiments, the split-type electrode ablation device includes two sets of split-type electrode assemblies 2, and the receiving cavity inside the corresponding delivery conduit 1 is configured as two sets of sub-receiving cavities corresponding to the two sets of split-type electrode assemblies 2, with one set of split-type electrode assembly 2 disposed in each sub-receiving cavity.

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

[0051] Specifically, when the receiving cavity includes a sub-receiving cavity, the receiving cavity and the sub-receiving cavity are the same structure but with different names. When the receiving cavity includes at least two sub-receiving cavities, each sub-receiving cavity includes a main cavity 11 and at least two auxiliary cavities 12.

[0052] In some possible embodiments, the receiving cavity includes a main cavity 11 and at least two secondary cavities 12. The at least two secondary cavities 12 are spaced apart around the main cavity 11 and communicate with the main cavity 11. The main cavity 11 is used to allow the ablation electrode 21 to pass through. The pusher 22 of each ablation electrode 21 can move along its respective secondary cavity 12. By dividing the receiving cavity into the main cavity 11 and the secondary cavities 12, the movement channel of the ablation electrode 21 can be isolated from the movement channel of the pusher 22, avoiding interference. At the same time, by placing the ablation electrode 21 separately in the main cavity 11, to a certain extent, the diameter of the main cavity 11 can be avoided from being too large, which would cause the ablation electrode 21 to shift when moving in the main cavity 11. Furthermore, by separating the main cavity 11 and the secondary cavities 12, the diameter of the main cavity 11 can be avoided from being too large, which would cause the ablation electrode 21 placed in it to easily shift. This ensures that the ablation electrode 21 moves accurately to the position to be ablated, ensuring the accuracy of the ablation electrode 21 arrangement.

[0053] Specifically, at least two secondary cavities 12 are spaced apart in the circumference of the main cavity 11, and at least two secondary cavities 12 are connected through the main cavity 11. This can prevent the pusher 22 located in the secondary cavity 12 from interfering with the operation of the split electrode ablation device.

[0054] In this embodiment, the main cavity 11 and the secondary cavity 12 are both arranged along the circumferential direction of the delivery conduit 1 and pass through both ends of the delivery conduit 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 conduit 1.

[0055] In this embodiment, the split electrode assembly 2 includes at least two ablation electrodes 21. The at least two ablation electrodes 21 are arranged sequentially to form a linear split electrode assembly 2. When the split electrode assembly 2 is in its initial state, the adjacent ablation electrodes 21 are spaced apart or abutted together. The adjacent ablation electrodes 21 can be abutted together by pushing the pusher 22.

[0056] Specifically, the pushers 22 on at least two ablation electrodes 21 are spaced apart to ensure that the pushers 22 on at least two ablation electrodes 21 do not interfere with each other during 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 the actual situation and are not limited here.

[0059] Preferably, the split electrode assembly 2 includes five ablation electrodes 21, each ablation electrode 21 being a columnar structure with a pointed end. The sub-accommodating cavity includes a main cavity 11 and five sub-cavities 12, with each sub-cavity 12 corresponding to a pusher 22. The five ablation electrodes 21 are arranged sequentially to form a linear split electrode assembly 2. All five ablation electrodes 21 are disposed in the main cavity 11, and the pushers 22 disposed thereon are respectively disposed in their respective sub-cavities 12.

[0060] In some possible embodiments, at least one positioning structure 213 is provided on the periphery of the ablation electrode 21. 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 restrict 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 structure 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 periphery of the ablation electrode 21, and at least one ring of the above-mentioned positioning structure 213 is formed on the sidewall of the ablation electrode 21.

[0063] Preferably, at least one positioning structure 213 is disposed at intervals around the periphery of the ablation electrode 21, forming two rings of positioning structure 213 on the sidewall of the ablation electrode 21.

[0064] In some possible embodiments, the positioning structure 213 is a barb protruding from the outer wall of the ablation electrode 21 to prevent detachment. The barb extends towards the proximal end of the delivery conduit 1. By setting the barb, the positioning structure 213 can be simplified, the positioning operation can be simplified, and the manufacturing cost can be reduced, while ensuring that the ablation electrode 21 is positioned with the position to be ablated.

[0065] In this embodiment, the positioning structure 213 is integrally formed with the delivery conduit 1 or the positioning structure 213 is snapped onto the delivery conduit 1, and the end face of the anti-detachment barb away from the delivery conduit 1 is a slope; along the proximal end to the distal end of the delivery conduit 1, the distance between the slope and the delivery conduit 1 gradually decreases.

[0066] In some possible embodiments, the inner wall of the receiving cavity 11 is either in contact with or has a gap with the positioning structure 213. When the inner wall of the receiving cavity 11 is in contact with the positioning structure 213, displacement of the ablation electrode 21 disposed in the receiving cavity 11 can be avoided, further ensuring the positioning accuracy of the ablation electrode 21 during ablation, thereby ensuring the puncture success rate of the split electrode ablation device. When the inner wall of the receiving cavity 11 has a gap with the positioning structure 213, the smoothness of pushing the ablation electrode 21 can be ensured, the positioning of the ablation electrode 21 can be accelerated, and the puncture time can be shortened.

[0067] In some possible embodiments, the positioning structures 213 on the delivery conduit 1 are evenly spaced, and the inner wall of the main cavity 11 is provided with a receiving groove corresponding to the positioning structure 213. The receiving groove is arranged along the axial direction of the delivery conduit 1. By providing a receiving groove to accommodate the positioning structure 213, displacement of the ablation electrode 21 when it moves in the delivery conduit 1 is further avoided, 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 to proximal end of the delivery conduit 1, the two ends of the ablation electrode 21 are respectively the insertion tip 211 and the positioning end 212; the pusher 22 is disposed at the positioning end 212, which can accommodate part of the insertion tip 211 of the ablation electrode 21 adjacent to it, which can ensure that the ablation electrode 21 with the insertion tip 211 can be inserted into the position to be ablated, thus ensuring the positioning accuracy of the ablation electrode 21 during ablation. At the same time, by disposing of the pusher 22 at the positioning end 212, interference between the pusher 22 and its corresponding ablation electrode 21 can be avoided, thus 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, and the shape of the insertion tip 211 is conical or pyramidal along the direction from the proximal end to the distal end of the delivery conduit 1.

[0070] In this embodiment, a positioning hole is provided on the positioning end 212. 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 it can accommodate the part of the tip 211 that is adjacent to it.

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

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

[0073] Preferably, the pusher 22 is a push rod, and the shape of the push rod is not limited, as long as it does not interfere with the adjacent ablation electrode 21.

[0074] 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 periphery of the positioning hole. Along the direction from the distal end to the proximal end of the delivery conduit 1, the distance between the push rod and the axis of the delivery conduit 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 in sealed communication with the proximal end of the delivery catheter 1. The negative pressure system is used to adjust the air pressure in the receiving cavity to a negative pressure. When the air pressure in the receiving cavity is negative, the distal end of the delivery catheter 1 can generate an adsorption force. By setting the negative pressure system, it can be ensured that before the ablation electrode 21 is placed at the position to be ablated, the delivery catheter 1 is subjected to negative pressure treatment by the negative pressure system, which can make the distal end of the delivery catheter 1 adsorb onto the surface of the position to be ablated, thereby ensuring the positioning accuracy of the placed ablation electrode 21. This can further improve the puncture success rate of the split electrode ablation device and shorten the positioning time, thus reducing the patient's operation time, reducing damage to surrounding tissues during the operation, and improving the safety of the split electrode ablation device.

[0076] In this embodiment, the negative pressure system is installed on the side wall of the delivery conduit 1 or at the proximal end of the delivery conduit 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 receiving cavity of the delivery conduit 1 to negative pressure.

[0078] In some possible embodiments, an inductor 13 is provided on the delivery catheter 1. When the inductor 13 is energized, it generates an electromagnetic attraction force, which can drive the ablation electrode 21 located outside the delivery catheter 1 to move towards the proximal end of the delivery catheter 1. The inductor 13 also has an electromagnetic positioning function, so as to accurately determine the position and direction of the inductor 13 during the operation. By providing the inductor 13 on the delivery catheter 1, the electromagnetic attraction force generated by the inductor 13 when energized can act on the ablation electrode 21, thereby driving the ablation electrode 21 inserted into the ablation position back into the delivery catheter 1, thereby ensuring the safe removal of the ablation electrode 21 inserted into the ablation position, avoiding the presence of foreign bodies in the body after the operation, and thus 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 radiopaque material, which allows for direct visualization of the puncture and ablation site, thus improving the success rate of the puncture.

[0080] In some possible embodiments, the pusher 22 is a magnetic component, which can be magnetically connected to the inductor assembly 13. When the inductor assembly 13 is energized, the inductor assembly 13 drives the pusher 22 located outside the delivery conduit 1 to move into the receiving cavity. By setting the pusher 22 as a magnetic component, it can be ensured that the magnetic force generated by the inductor assembly 13 acts on the pusher 22, thereby achieving the effect of the pusher 22 driving the ablation electrode 21 fixedly connected to it to move towards the inside of the receiving cavity, thus ensuring that the ablation electrode inserted into the ablation position is safely removed.

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

[0082] In some possible embodiments, the inductor component 13 is an inductor coil, which is disposed on the side wall of the delivery conduit 1. By setting the inductor component 13 as an inductor coil and fixing the inductor coil inside the side wall of the delivery conduit 1, the support capacity of the delivery conduit 1 can be improved, ensuring that the delivery conduit 1 will not deform under negative pressure, thereby ensuring the accuracy of the ablation electrode 21 arrangement and the structural stability of the delivery conduit 1. To a certain extent, it can also improve the service life of the delivery conduit 1 and reduce the cost of use.

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

[0084] Preferably, the length of the inductor coil is equal to the length of the delivery conduit 1, which can improve the magnetic force provided by the inductor coil.

[0085] In some possible embodiments, a driving device is also included. The driving device is driven to connect with the pusher 22. The driving device can drive the pusher 22 to move toward the distal end of the delivery conduit 1. By setting the driving device, the pusher can be driven to move, thereby driving the ablation electrode 21 to move toward the distal end of the delivery conduit 1.

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

[0087] Preferably, the driving device includes a driving end, which can be driven to connect with the pusher 22 disposed in different sub-cavities 12 respectively.

[0088] In some other possible embodiments, the driving device includes a plurality of driving ends, the number of which corresponds to the number of pushers 22, i.e., one driving end drives one of its corresponding pushers 22 to move toward the distal end of the delivery conduit 1.

[0089] This invention also protects a pulse ablation device, including an ablation mechanism and the aforementioned split-electrode ablation device; the ablation mechanism is connected to the split-electrode ablation device, and 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 assembly 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 assembly 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 electromagnetic mode, energizes the electromagnetic coil, activates the electromagnet function, and turns the pusher 22 into an electromagnet, completing the retrieval and removal of the ablation electrode 21; in this embodiment, By designing at least two ablation electrodes 21 in the split electrode assembly as split electrodes, the split electrode ablation device can control different groups and / or different numbers of ablation electrodes 21 to ablate according to the shape and size of the lesion. This allows for flexible arrangement of the ablation electrodes 21, ensuring full coverage of the lesion area and avoiding excessive damage to normal tissue. At the same time, by pushing the pusher 22 set on different ablation electrodes 21, the corresponding number of ablation electrodes 21 can be controlled to perform pulse ablation on the ablation site while ensuring the ablation area. This achieves the effect of flexible arrangement of ablation depth, ensuring thorough ablation of occult or deep lesions, and improving the flexibility of ablation electrode arrangement and puncture accuracy.

[0090] The working process of the pulse ablation device is as follows: The split electrode ablation device is inserted into the digestive tract. The distal end of the delivery catheter 1 is moved to the position to be ablated. The negative pressure system is used to apply negative pressure to the cavity of the delivery catheter 1, so that the distal end of the delivery catheter 1 is attracted to the position to be ablated. The drive device drives the pusher 22 to insert the ablation electrode 21 into the position to be ablated. The ablation mechanism provides ablation energy to the ablation electrode 21 to perform pulse ablation on the position to be ablated. After the puncture ablation is completed, the ablation mechanism provides the required current to the inductor component 13. The inductor component 13, which is set on the side wall of the delivery catheter 1, generates magnetic attraction force, which magnetically attracts the pusher 22 on the ablation electrode 21 inserted into the position to be ablated, and drives the ablation electrode 21 inserted into the position to be ablated back into the delivery catheter 1. The ablation electrode 21 inserted into the position to be ablated is safely removed. The delivery catheter 1 is then moved out of the digestive tract, thus completing the ablation process.

[0091] Example 1

[0092] See appendix Figure 1-6This embodiment provides a split-type electrode ablation device, including: a delivery conduit 1 having a distal end and a proximal end arranged opposite to each other, and having a receiving cavity; at least one set of split-type electrode assemblies 2, the at least one set of split-type electrode assemblies 2 being spaced apart in the receiving cavity, the split-type electrode assembly 2 including at least two ablation electrodes 21; at least two ablation electrodes 21 being arranged sequentially along the axial direction of the delivery conduit 1; each ablation electrode 21 having a pushing member 22 on the side facing the proximal end of the delivery conduit 1, the pushing member 22 being able to drive the corresponding ablation electrode 21 to move from the proximal end to the distal end under the action of external force.

[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 extends into the gastrointestinal tract. Under the action of the negative pressure system, the distal end of the delivery catheter 1 is attracted to the ablation position. Under the action of external force, the pusher 22 drives the corresponding ablation electrode 21 to move from the proximal end to the distal end, until at least one ablation electrode 21 is inserted into the ablation position, so as to realize that at least one ablation electrode 21 ablates the position to be ablated.

[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 conduit 1. The negative pressure system is used to adjust the air pressure in the accommodating cavity to a negative pressure. When the air pressure in the accommodating cavity is negative, the distal end of the delivery conduit 1 can generate an adsorption force.

[0095] In this embodiment, the negative pressure system is installed on the side wall of the delivery conduit 1 or at the proximal end of the delivery conduit 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 receiving cavity of the delivery conduit 1 to negative pressure.

[0097] In this embodiment, an inductor 13 is provided on the delivery catheter 1. When the inductor 13 is energized, the inductor 13 generates an electromagnetic attraction force, which can drive the ablation electrode 21 located outside the delivery catheter 1 to move towards the proximal end of the delivery catheter 1. The inductor 13 also has an electromagnetic positioning function, so as to accurately determine the position and direction of the inductor 13 during the operation.

[0098] In this embodiment, the pusher 22 is a magnetic component, which can be magnetically connected to the inductor assembly 13. When the inductor assembly 13 is energized, the inductor assembly 13 drives the pusher 22 located outside the delivery conduit 1 to move into the receiving cavity.

[0099] In this embodiment, the inductor component 13 is an inductor coil, which is disposed on the side wall of the delivery conduit 1.

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

[0101] Preferably, the length of the inductor coil is equal to the length of the delivery conduit 1, which can improve the magnetic force provided by the inductor coil.

[0102] In this embodiment, the split electrode ablation device also includes a driving device, which is drivenly connected to the pusher 22. The driving device can drive the pusher 22 to move toward the distal end of the delivery conduit 1.

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

[0104] Preferably, the driving device includes a driving end, which can be driven to connect with the pusher 22 disposed in different sub-cavities 12 respectively.

[0105] In this embodiment, the receiving cavity includes a main cavity 11 and at least two secondary cavities 12. The at least two secondary cavities 12 are spaced apart in the circumference of the main cavity 11 and communicate with the main cavity 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 respective secondary cavity 12.

[0106] Specifically, when the receiving cavity includes a sub-receiving cavity, the receiving cavity and the sub-receiving cavity are the same structure but with different names. The sub-receiving cavity includes a main cavity 11 and at least two secondary cavities 12. The at least two secondary cavities 12 are spaced apart in the circumference of the main cavity 11, and the at least two secondary cavities 12 are connected through the main cavity 11. This can avoid interference with the pusher 22 located in the secondary cavity 12 and ensure 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 both arranged along the circumferential direction of the delivery conduit 1 and pass through both ends of the delivery conduit 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 conduit 1.

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

[0109] In this embodiment, the split electrode assembly 2 includes at least two ablation electrodes 21. The at least two ablation electrodes 21 are arranged sequentially to form a linear split electrode assembly 2. When the split electrode assembly 2 is in its initial state, the adjacent ablation electrodes 21 are spaced apart or abutted together. The adjacent ablation electrodes 21 can be abutted together by pushing the pusher 22. The inner wall of the receiving cavity abuts together with the positioning structure 213.

[0110] Specifically, the pushers 22 on at least two ablation electrodes 21 are spaced apart to ensure that the pushers 22 on at least two ablation electrodes 21 do not interfere with each other during 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 the actual situation and are not limited here.

[0113] Preferably, the split electrode assembly 2 includes five ablation electrodes 21, each ablation electrode 21 being a columnar structure with a pointed end. The sub-accommodating cavity includes a main cavity 11 and five sub-cavities 12, with each sub-cavity 12 corresponding to a pusher 22. The five ablation electrodes 21 are arranged sequentially to form a linear split electrode assembly 2. All five ablation electrodes 21 are disposed in the main cavity 11, and the pushers 22 disposed thereon are respectively disposed in their respective sub-cavities 12.

[0114] In this embodiment, at least one positioning structure 213 is provided on the periphery 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 restrict 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 structure 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 periphery of the ablation electrode 21, and at least one ring of the above-mentioned positioning structure 213 is formed on the sidewall of the ablation electrode 21.

[0117] Preferably, at least one positioning structure 213 is disposed at intervals around the periphery of the ablation electrode 21, forming two rings of positioning structure 213 on the sidewall of the ablation electrode 21.

[0118] In this embodiment, the positioning structure 213 is a barb protruding from the outer wall of the ablation electrode 21 to prevent detachment, and the barb extends towards the proximal end of the delivery conduit 1.

[0119] In this embodiment, the positioning structure 213 is integrally formed with the delivery conduit 1 or the positioning structure 213 is snapped onto the delivery conduit 1, and the end face of the anti-detachment barb away from the delivery conduit 1 is a slope; along the proximal end to the distal end of the delivery conduit 1, the distance between the slope and the delivery conduit 1 gradually decreases.

[0120] In this embodiment, along the distal to proximal end of the delivery conduit 1, the two ends of the ablation electrode 21 are the insertion tip 211 and the positioning end 212, respectively; the pusher 22 is disposed at the positioning end 212, and the positioning end 212 can accommodate a portion of the insertion tip 211 of the ablation electrode 21 adjacent to it.

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

[0122] In this embodiment, a positioning hole is provided on the positioning end 212. 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 it can accommodate the part of the tip 211 that is adjacent to it.

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

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

[0125] Preferably, the pusher 22 is a push rod, and the shape of the push rod is not limited, as long as it does 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 periphery of the positioning hole. Along the direction from the distal end to the proximal end of the delivery conduit 1, the distance between the push rod and the axis of the delivery conduit 1 gradually increases.

[0127] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

[0128] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0129] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A split-type electrode ablation device, characterized in that, include: A delivery conduit (1) having a distal and a proximal end arranged opposite to each other, and having a receiving cavity; At least one set of split electrode assemblies (2) are spaced apart in the receiving cavity, and each split electrode assembly (2) includes at least two ablation electrodes (21); the at least two ablation electrodes (21) are arranged sequentially along the axial direction of the delivery conduit (1); Each of the ablation electrodes (21) is provided with a pusher (22) on the side facing the proximal end of the delivery conduit (1). Under the action of external force, the pusher (22) can drive the corresponding ablation electrode (21) to move from the proximal end to the distal end. Along the distal end to the proximal end of the delivery conduit (1), the two ends of the ablation electrode (21) are the insertion tip (211) and the positioning end (212), respectively. The pusher (22) is disposed on the positioning end (212), which is capable of accommodating a portion of the insertion tip (211) of the ablation electrode (21) adjacent to it.

2. The split-type electrode ablation device according to claim 1, characterized in that, At least one positioning structure (213) is provided on the periphery 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 restrict the movement of the ablation electrode (21) toward the proximal end of the delivery conduit (1).

3. The split-type electrode ablation device according to claim 2, characterized in that, The positioning structure (213) is a barb protruding from the outer wall of the ablation electrode (21), which extends toward the proximal end of the delivery conduit (1).

4. The split-type electrode ablation device according to claim 2, characterized in that, The inner wall of the receiving cavity abuts against or is spaced apart from the positioning structure (213).

5. The split-type electrode ablation device according to any one of claims 1-4, characterized in that, It also includes a negative pressure system, which is in sealed communication with the proximal end of the delivery conduit (1); The negative pressure system is used to adjust the air pressure of the receiving cavity to a negative pressure. When the air pressure in the receiving cavity is negative, the distal end of the delivery conduit (1) can generate an adsorption force.

6. The split-type electrode ablation device according to any one of claims 1-4, characterized in that, An inductor assembly (13) is provided on the delivery conduit (1); When the inductor assembly (13) is energized, the inductor assembly (13) generates an electromagnetic attraction force, which can drive the ablation electrode (21) located outside the delivery conduit (1) to move toward the proximal end of the delivery conduit (1). The inductor assembly (13) also has an electromagnetic positioning function, so as to accurately determine the position and orientation of the inductor assembly (13) during the operation.

7. The split-type electrode ablation device according to claim 6, characterized in that, The pusher (22) is a magnetic component, and the pusher (22) can be magnetically connected to the inductor assembly (13); When the inductor assembly (13) is energized, the inductor assembly (13) drives the pusher (22) located outside the delivery conduit (1) to move into the receiving cavity.

8. The split-type electrode ablation device according to claim 6, characterized in that, The inductor assembly (13) is an inductor coil, which is disposed on the side wall of the delivery conduit (1).

9. The split-type electrode ablation device according to any one of claims 1-4, characterized in that, The receiving cavity includes a main cavity (11) and at least two secondary cavities (12), the at least two secondary cavities (12) being spaced apart in the circumferential direction of the main cavity (11) and communicating with the main cavity (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 their respective sub-cavities (12).

10. The split-type electrode ablation device according to any one of claims 1-4, characterized in that, It also includes a drive device, which is driven to connect with the pusher (22) and is capable of driving the pusher (22) to move toward the distal end of the delivery conduit (1).

11. A pulse ablation device, characterized in that, Includes an ablation mechanism and a split-type electrode ablation device as described in any one of claims 1-10; 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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