CN-119856971-B - Ablation assembly and radio frequency ablation catheter

CN119856971BCN 119856971 BCN119856971 BCN 119856971BCN-119856971-B

Abstract

The application relates to an ablation assembly and a radio frequency ablation catheter, wherein a deformation frame body is provided with a contracted state and an expanded state, an ablation electrode group comprises a plurality of electrode elements distributed on the surface of the deformation frame body, the plurality of electrode elements can be respectively constructed into a plurality of annular track unit groups and a plurality of linear track unit groups in the axial direction and the circumferential direction of the deformation frame body in the expanded state of the deformation frame body, the annular track unit groups surround the deformation frame body along the circumferential direction, and the linear track unit groups are linearly distributed along the axial direction of the deformation frame body. The plurality of electrode elements in the ablation electrode group form a plurality of annular track unit groups and a plurality of linear track unit groups in the axial direction and the circumferential direction of the deformation frame body, so that the ablation treatment range can be greatly expanded in a blood vessel along with the expansion of the deformation frame body, and the operation such as axial movement, circumferential rotation and the like is not needed any more, so that the treatment in a larger range can be realized, the treatment efficiency can be effectively improved, the operation difficulty is reduced, and the development of the ablation treatment technology is facilitated.

Inventors

LI YUN
DONG CHAO
CAI YANLI
GAO BIN

Assignees

上海鸿电医疗科技有限公司

Dates

Publication Date: 20260508
Application Date: 20231019

Claims (12)

1. An ablation assembly, the ablation assembly comprising: the deformation frame body is provided with a contracted state and an expanded state; The ablation electrode group comprises at least three electrode elements distributed on the surface of the deformation frame body, a plurality of annular track unit groups are constructed by the electrode elements in the axial direction of the deformation frame body when the deformation frame body is in an unfolding state, and a plurality of linear track unit groups are constructed by the electrode elements in the circumferential direction of the deformation frame body when the deformation frame body is in a circumferential direction, wherein the annular track unit groups surround the deformation frame body along the circumferential direction, and the linear track unit groups are linearly distributed along the axial direction of the deformation frame body; The plurality of deformation support rods are spirally and circumferentially wound along the axial direction, and the plurality of electrode elements of the ablation electrode group are arranged on the plurality of deformation support rods, so that the plurality of electrode elements can be respectively constructed into a plurality of annular track unit groups and a plurality of linear track unit groups in the axial direction and the circumferential direction; The first bundling element is in bundling connection with the distal ends of the plurality of deformed bracket rods; the second bundling element is connected with the proximal ends of the deformation bracket rods in a bundling way.
2. The ablation assembly of claim 1, wherein each of said annular track cell sets forms a radial ablation energy ring in a radial direction of said deformed frame, wherein no overlap occurs between adjacent ones of said radial ablation energy rings formed by adjacent ones of said annular track cell sets, and/or wherein, Each linear track unit group forms an axial ablation energy ring in the axial direction of the deformation frame body, and adjacent axial ablation energy rings formed by adjacent linear track unit groups do not overlap.
3. The ablation assembly of claim 2, wherein a plurality of the electrode elements in each of the annular track cell sets are each surrounded by an annular track along a circumference of the deformed frame with a plane in which the annular track lies being perpendicular to an axis of the deformed frame, and/or, The spacing between adjacent ones of the electrode elements in each of the annular-shaped trajectory unit groups is the same, and/or, The electrode elements in each linear track unit group are distributed along the axial direction of the deformation frame body in a linear track, the linear track is parallel to the axial direction of the deformation frame body, and/or, The spacing between adjacent electrode elements in each of the linear track cell groups is the same.
4. The ablation assembly of claim 1, wherein each of said annular track cell sets forms a radial ablation energy ring in a radial direction of said deformed frame, at least a portion of adjacent radial ablation energy rings overlap between adjacent radial ablation energy rings formed by adjacent ones of said annular track cell sets, and/or, Each linear track unit group forms an axial ablation energy ring in the axial direction of the deformation frame body, and at least part of adjacent axial ablation energy rings are overlapped between the adjacent axial ablation energy rings formed by the adjacent linear track unit groups.
5. The ablation assembly of claim 4, wherein a plurality of said electrode elements in each of said sets of annular track elements are circumferentially encircling an annular track along said deformed frame, at least a portion of the planes in which adjacent said annular tracks lie having included angles therebetween, and/or, And a plurality of electrode elements in each linear track unit group are distributed in a linear track along the axial direction of the deformation frame body, and an included angle is formed between at least part of adjacent linear tracks.
6. The ablation assembly of claim 1, wherein the electrode member defines a media irrigation hole for delivering a cooling medium.
7. The ablation assembly of claim 1, wherein the deformed stent rod has at least one of a wire delivery channel and a first medium delivery channel open therein, wherein the wire delivery channel is configured to pass through an energy delivery wire configured to connect the electrode element, the first medium delivery channel is configured to deliver a cooling medium, and/or, The first bundling element comprises a first bundling end head and a plurality of first bundling support rods, the first bundling end head is in bundling connection with the distal ends of the plurality of first bundling support rods, the number of the first bundling support rods is the same as that of the deformation support rods, the proximal end of each first bundling support rod is connected with the distal end of one deformation support rod, and/or, The second bundling element comprises a second bundling end head and a plurality of second bundling support rods, the second bundling end head is connected with the proximal ends of the second bundling support rods in a bundling mode, the number of the second bundling support rods is the same as that of the deformation support rods, and the distal ends of the second bundling support rods are connected with the proximal ends of the deformation support rods.
8. The ablation assembly of claim 7, wherein a second medium delivery channel is provided in the second bundling bracket bar, the second medium delivery channel being for delivering a cooling medium, and/or, At least one of the first bundling end and the second bundling end is provided with a central through hole, the central through hole is used for penetrating an inner core rod, and/or, At least one of the first bundling bracket bar and the second bundling bracket bar is an elastic bar, and/or, The outer contour diameter of the plurality of first bundle support rods in the first bundle element gradually increases in the direction from the distal end to the proximal end of the first bundle element, and/or, The outer contour diameter formed by a plurality of the second bundling bracket rods in the second bundling element gradually increases in the direction from the proximal end to the distal end of the second bundling element.
9. The ablation assembly of claim 1, wherein the deformation frame comprises: the conveying bracket comprises a conveying bracket rod, wherein a medium filling channel is formed in the conveying bracket rod and used for conveying cooling medium.
10. The ablation assembly of claim 9, wherein the number of channel outlets of the medium irrigation channel is the same as the number of electrode elements, each channel outlet corresponding to one of the electrode elements, or The number of the conveying support rods is the same as that of the deformation support rods, a plurality of the conveying support rods are spirally and circumferentially wound along the axial direction, each conveying support rod corresponds to one deformation support rod, and the number of channel outlets on each conveying support rod corresponds to the same electrode elements on the corresponding deformation support rods.
11. The ablation assembly of claim 1, wherein the electrode member is a sleeve-like member having a socket cavity therethrough at both ends, the electrode member being socket-connected to the deformed support bar, and/or, The electrode element comprises at least two unit electrodes, at least one unit electrode in all the unit electrodes is a radio frequency signal receiving electrode, and the rest unit electrodes are radio frequency signal transmitting electrodes.
12. A radiofrequency ablation catheter, characterized in that it comprises: The outer sheath tube is provided with an inner cavity which is axially penetrated; the inner core rod is movably assembled in the inner cavity of the outer sheath tube; The ablation assembly of any of claims 1-11, disposed at a distal end of the outer sheath, the inner core shaft being coupled to a deformation frame of the ablation assembly for controlling the deformation frame to transition between the contracted state and the expanded state.

Description

Ablation assembly and radio frequency ablation catheter Technical Field The application relates to the technical field of medical instruments, in particular to an ablation assembly and a radio frequency ablation catheter. Background The radio frequency ablation technology mainly depends on a radio frequency therapeutic instrument with an ablation function and a cutting function, and the therapeutic mechanism is mainly a thermal effect. When radio frequency current flows through biological tissue, water molecules with polarity in the biological tissue move at high speed due to the rapid change of an electromagnetic field, heat is generated (i.e. internal heating effect), so that water inside and outside cells is evaporated, dried, condensed and shed so as to cause aseptic necrosis, and the aim of treatment is fulfilled. Conventional multipolar ablation is generally a superficial ablation in which a radio-frequency electrode discharges to a back electrode plate, and the arrangement mode of the radio-frequency electrode cannot cover a larger treatment area, so that the treatment effect cannot reach an ideal state. Disclosure of Invention Based on this, it is necessary to provide an ablation assembly and a radio frequency ablation catheter in view of at least one of the technical problems mentioned above. The present application provides an ablation assembly comprising: the deformation frame body is provided with a contracted state and an expanded state; the ablation electrode group comprises a plurality of electrode elements distributed on the surface of the deformation frame body, and in the unfolded state of the deformation frame body, the electrode elements can be respectively constructed into a plurality of annular track unit groups and a plurality of linear track unit groups in the axial direction and the circumferential direction of the deformation frame body, wherein the annular track unit groups surround the circumferential direction of the deformation frame body, and the linear track unit groups are linearly distributed in the axial direction of the deformation frame body. In one embodiment, each annular track unit group forms a radial ablation energy ring in the radial direction of the deformation frame body, and adjacent radial ablation energy rings formed by adjacent annular track unit groups are not overlapped, and/or, Each linear track unit group forms an axial ablation energy ring in the axial direction of the deformation frame body, and adjacent axial ablation energy rings formed by adjacent linear track unit groups do not overlap. In one embodiment, a plurality of electrode elements in each annular track unit group are round in an annular track along the circumferential direction of the deformation frame body, and the plane of the annular track is perpendicular to the axis of the deformation frame body, and/or, The spacing between adjacent ones of the electrode elements in each of the annular-shaped trajectory unit groups is the same, and/or, The electrode elements in each linear track unit group are distributed along the axial direction of the deformation frame body in a linear track, the linear track is parallel to the axial direction of the deformation frame body, and/or, The spacing between adjacent electrode elements in each of the linear track cell groups is the same. In one embodiment, each annular track unit group forms a radial ablation energy ring in the radial direction of the deformation frame body, and at least part of adjacent radial ablation energy rings formed by adjacent annular track unit groups are overlapped, and/or, Each linear track unit group forms an axial ablation energy ring in the axial direction of the deformation frame body, and at least part of adjacent axial ablation energy rings are overlapped between the adjacent axial ablation energy rings formed by the adjacent linear track unit groups. In one embodiment, a plurality of electrode elements in each annular track unit group are surrounded by annular tracks along the circumferential direction of the deformation frame body, and at least part of adjacent annular tracks form included angles between planes, and/or, And a plurality of electrode elements in each linear track unit group are distributed in a linear track along the axial direction of the deformation frame body, and an included angle is formed between at least part of adjacent linear tracks. In one embodiment, the electrode element is provided with a medium filling hole for conveying a cooling medium. In one embodiment, the deformation frame includes: The plurality of deformation support rods are spirally and circumferentially wound along the axial direction, and the plurality of electrode elements of the ablation electrode group are arranged on the plurality of deformation support rods, so that the plurality of electrode elements can be respectively constructed into a plurality of annular track unit groups and a plurality of linear track unit groups in th