CN216257369U

CN216257369U - Ablation device

Info

Publication number: CN216257369U
Application number: CN202122279807.1U
Authority: CN
Inventors: 衷兴华; 杨克; 严韩平
Original assignee: Hangzhou Vena Anke Medical Technology Co ltd
Current assignee: Hangzhou Vena Anke Medical Technology Co ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-04-12
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses an ablation device, which comprises a catheter, a capsule, a plurality of ablation electrodes, a plurality of memory supporting rods, a far-end electrode and a near-end electrode, wherein the catheter is arranged in the capsule; the catheter is provided with a near end and a far end which are arranged in the length direction, the far end of the catheter is communicated with the balloon, and the plurality of ablation electrodes are arranged on the outer peripheral wall of the balloon at intervals; the memory support rods extend along the length direction of the capsule body, and are arranged on the inner peripheral wall of the capsule body at intervals along the circumferential direction of the capsule body; the far-end electrode is arranged at one end of the balloon body far away from the catheter, and the near-end electrode is arranged at the position of the catheter close to the balloon body. So set up, can enlarge ablation device's ablation scope, can prevent again when the utricule inflation that ablation electrode on the utricule from taking place the skew relatively waiting to ablate the tissue to make and melt position and ablation scope not influenced.

Description

Ablation device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an ablation device.

Background

Ablation devices typically include a catheter, a balloon in communication with a distal end of the catheter, and an ablation electrode mounted on a peripheral wall of the balloon. In the process of ablation operation, the far end of the catheter and the capsule body extend into the tissue to be ablated in the target organism, the capsule body is inflated or filled with liquid through the catheter, and the capsule body is expanded, so that the ablation electrode on the capsule body ablates the tissue to be ablated of the target organism.

However, the ablation range of the ablation device is limited only by the ablation electrode pair on the electrode tip, and when the balloon is expanded, the ablation electrode on the balloon is easy to shift relative to the tissue to be ablated, so that the ablation position and the ablation range are affected, and therefore, the improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an ablation device, which can not only enlarge the ablation range of the ablation device, but also prevent an ablation electrode on a capsule from deviating relative to a tissue to be ablated when the capsule is expanded, so that the ablation position and the ablation range are not influenced.

In order to achieve the above object, the present invention provides an ablation device, which includes a catheter, a balloon, a plurality of ablation electrodes, a plurality of memory support rods, a distal electrode, and a proximal electrode; wherein the content of the first and second substances,

the catheter is provided with a near end and a far end which are arranged in the length direction, the far end of the catheter is communicated with the balloon, and the plurality of ablation electrodes are arranged on the peripheral wall of the balloon at intervals;

the memory support rods extend along the length direction of the bag body, the memory support rods are arranged on the inner peripheral wall of the bag body at intervals along the circumferential direction of the bag body, and each memory support rod can bulge outwards when the bag body expands;

the distal electrode is mounted at one end of the balloon body far away from the catheter, and the proximal electrode is mounted at a position of the catheter close to the balloon body.

In some embodiments of the present invention, the number of the memory support rods is at least three, and at least three memory support rods are uniformly spaced along the circumferential direction of the balloon.

In some embodiments of the present invention, the proximal electrode includes a proximal seat and a proximal electrode body, both of which are annularly disposed, the proximal seat is sleeved on the distal end of the catheter, and the proximal electrode body is sleeved on the outer peripheral wall of the proximal seat.

In some embodiments of the present invention, the distal electrode includes a distal seat connected to an end of the balloon away from the catheter, and a distal electrode body sleeved on a peripheral wall of the distal seat.

In some embodiments of the utility model, the diameter of the distal seat is greater than or equal to the diameter of the proximal seat and the diameter of the balloon when deflated is less than or equal to the diameter of the distal seat.

In some embodiments of the present invention, the distal seat is made of a transparent material, and a micro-camera is disposed in the distal seat;

and/or the near-end seat is made of transparent materials, and a micro camera is arranged in the near-end seat.

In some embodiments of the present invention, the miniature camera head includes a camera head body and a miniature wide-angle lens coupled to the camera head body.

In some embodiments of the present invention, the outer peripheral wall of the balloon is provided with two mapping electrodes at the position where the deformation amount is maximum when the balloon is inflated, the two mapping electrodes are symmetrically arranged about the axis of the balloon, and each mapping electrode is spaced apart from the ablation electrode.

In some embodiments of the utility model, the peripheral wall of the balloon is provided with a pressure sensor at a location where the amount of deformation is greatest when the balloon is inflated.

In some embodiments of the utility model, the ablation device further comprises a steering handle in communication with the proximal end of the catheter for controlling inflation or deflation of the balloon.

According to the technical scheme, the ablation device can perform ablation through the ablation electrode and can perform ablation through the distal electrode and the proximal electrode by matching the distal electrode, the proximal electrode and the ablation electrode. And, through installing a plurality of memory bracing pieces in the inside of utricule for a plurality of memory bracing pieces can support the utricule when the utricule expands spacingly, and then can prevent that the ablation electrode on the utricule from waiting to ablate the tissue relatively and taking place the skew when the utricule expands, so that it is not influenced to melt position and ablation position. So set up, can enlarge ablation device's ablation scope, can prevent again when the utricule inflation that ablation electrode on the utricule from taking place the skew relatively waiting to ablate the tissue to make and melt position and ablation scope not influenced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of one embodiment of an ablation device of the present invention with a balloon inflated;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic structural view of an embodiment of the memory support stick of the present invention;

fig. 4 is a schematic view of a balloon of an ablation device of the present invention in a deflated configuration;

fig. 5 is an enlarged schematic view of B in fig. 3.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Ablation device	52	Distal electrode body
10	Catheter tube	60	Proximal electrode
				20	Capsule body	61	Proximal seat
30	Ablation electrode	62	Proximal electrode body
				40	Memory support rod	70	Mapping electrode
50	Distal electrode	80	Pressure sensor
				51	Distal end seat	90	Control handle

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 5, the ablation device 100 of the present invention includes a catheter 10, a balloon 20, a plurality of ablation electrodes 30, a plurality of memory support rods 40, a distal electrode 50, and a proximal electrode 60.

The catheter 10 has a proximal end and a distal end arranged in a length direction thereof, the distal end of the catheter 10 is arranged to communicate with the balloon 20, and a plurality of (two or more) ablation electrodes 30 are mounted to an outer peripheral wall of the balloon 20 at intervals. The length of the catheter 10 is set according to the length of the catheter 10 required to be inserted into the target living body, and when the length of the catheter 10 required to be inserted into the target living body is large, the length of the catheter 10 is increased appropriately, and when the length of the catheter 10 required to be inserted into the living body is small, the length of the catheter 10 is decreased appropriately. The conduit 10 may be a hard pipe, and the conduit 10 may also be a flexible pipe having a certain hardness, which is not particularly limited herein.

The expansion or contraction of the bladder 20 may be through inflation or deflation, or the expansion or contraction of the bladder 20 may be through filling or releasing of a liquid, which is not particularly limited herein.

The memory support bar 40 is in a strip shape, and the two ends of the memory support bar 40 are forced to protrude from the middle of the memory support bar 40. The plurality of memory support rods 40 are all extended along the length direction of the balloon 20, the plurality of memory support rods 40 are installed at the inner peripheral wall of the balloon 20 at intervals along the circumferential direction of the balloon 20, and each memory support rod 40 can be protruded outwards when the balloon 20 is expanded.

Preferably, the number of the memory support rods 40 is at least three, and the at least three memory support rods 40 are uniformly spaced along the circumferential direction of the balloon 20, so as to effectively prevent the ablation electrodes 30 on the balloon 20 from shifting relative to the tissue to be ablated when the balloon 20 is inflated. Also, the length of the memory support rod 40 in the axial direction of the balloon 20 may be the same as or different from the axial length of the balloon 20, and is not particularly limited herein.

The distal electrode 50 is mounted to the end of the balloon 20 distal to the catheter 10 and the proximal electrode 60 is mounted to the catheter 10 proximal to the balloon 20.

It should be noted that, in practical applications, the positions of the distal electrode 50, the proximal electrode 60 and each ablation electrode 30 can be addressed by the ablation generator, and then the corresponding electrode is selected for ablation according to the position of the tissue to be ablated. For example, the distal electrode 50, the proximal electrode 60, or any one of the ablation electrodes 30 may be individually selected and discharged in a positive-negative pair; positive and negative paired discharge can be performed by selecting any two ablation electrodes 30, and positive and negative paired discharge can be performed by selecting the proximal electrode 60 and any one ablation electrode 30.

Through the above technical scheme, when ablation is performed, firstly, the distal end of the catheter 10, the balloon body 20, the plurality of ablation electrodes 30, the plurality of memory support rods 40, the distal end electrode 50 and the proximal end electrode 60 are extended into the tissue to be ablated in the target organism, then, the balloon body 20 is inflated or filled with liquid through the catheter 10 to the balloon body 20 so as to expand the balloon body 20, support the position near the tissue to be ablated and enable the ablation electrodes 30 to abut against the tissue to be ablated, and further, the tissue to be ablated can be ablated through the distal end electrode 50, the proximal end electrode 60 and the ablation electrodes 30. Moreover, when the balloon 20 is expanded, each memory support rod 40 protrudes outwards to support and limit the expansion of the balloon 20, so that the ablation electrode 30 on the balloon 20 can be prevented from deviating relative to the tissue to be ablated when the balloon 20 is expanded, and the ablation position and the ablation direction are not affected. So configured, the ablation range of the ablation device 100 can be enlarged, and the ablation electrode 30 on the balloon 20 can be prevented from shifting relative to the tissue to be ablated when the balloon 20 is inflated, so that the ablation position and the ablation range are not affected.

Preferably, each ablation electrode 30 all inlays and locates the periphery wall of utricule 20 to make ablation electrode 30 level with the periphery wall of utricule 20, so set up, make the periphery wall of utricule 20 level, under the prerequisite that does not interfere ablation electrode 30 and melt, conveniently treat through utricule 20 and melt tissue department and support.

Further, in order to be convenient for be fixed in the internal perisporium of utricule 20 with memory bracing piece 40, the internal perisporium of utricule 20 is equipped with a plurality of long banding flexonics that are, each flexonics all sets up along the axial extension of utricule 20, a plurality of flexonics are arranged along the circumference interval of utricule 20, each flexonics width direction's both ends all are connected with the internal perisporium of utricule 20 (if bond, supersound hot melt is connected etc.), so that form the installation passageway between each flexonics and the utricule 20, each memory bracing piece 40 is all installed in the installation passageway that corresponds, so set up, make things convenient for memory bracing piece 40's installation and dismantlement.

To facilitate the installation of the proximal electrode 60, in some embodiments of the present invention, the proximal electrode 60 includes a proximal seat 61 and a proximal electrode body 62, both of which are disposed in a ring shape, the proximal seat 61 is disposed at the distal end of the catheter 10, and the proximal electrode body 62 is disposed at the outer peripheral wall of the proximal seat 61.

Specifically, the proximal seat 61 is screwed to the distal end of the catheter 10, and the proximal electrode body 62 is screwed to the outer peripheral wall of the proximal seat 61, so that the proximal seat 61 and the proximal electrode body 62 can be easily assembled and disassembled. The proximal holder 61 and the proximal electrode body 62 may be disposed in an open loop or a closed loop, and are not limited herein. The connection between the proximal hub 61 and the distal end of the catheter 10 and the connection between the proximal electrode body 62 and the outer peripheral wall of the proximal hub 61 may be made by bonding.

Further, in order to facilitate the electrical connection between the proximal end electrode body 62 and the ablation generator, a wire passing hole communicated with the inner peripheral wall of the proximal end seat 61 is formed in a position, facing the proximal end electrode body 62, of the outer peripheral wall of the proximal end seat 61, a through hole communicated with the inner peripheral wall of the outer peripheral wall of the catheter 10 is formed in the outer peripheral wall of the catheter 10, the through hole is also communicated with the wire passing hole, the proximal end electrode body 62 is connected with a proximal end insulated wire, and the proximal end insulated wire sequentially passes through the wire passing hole and the through hole, then extends out of the proximal end of the catheter 10 and is electrically connected with the ablation generator. Also, the connection of the proximal insulated wire to the proximal electrode body 62 may be direct abutment, welding, conductive adhesive bonding, etc., and is not particularly limited herein.

Similarly, in order to conveniently ablate electrode 30 and ablate generator electricity and be connected, utricule 20 is including being interior tunica interna and the outer tunica externa that the interval set up inside and outside, vacuole formation between interior tunica interna and the outer tunica externa, utricule 20 periphery wall all is equipped with the via hole with the cavity intercommunication in the face of each position of ablating electrode 30, catheter 10 axial one end is run through to its axial other end and is formed the passageway of stepping down with wire passing channel intercommunication, each melts electrode 60 and all is connected with the insulating wire of ablation that is located the cavity, each melts the one end that insulating wire kept away from corresponding ablation electrode 60 and passes corresponding via hole in proper order and step down the passageway after, stretch out catheter 10's near-end and with outside ablation generator electricity and be connected. The ablation insulated wire is connected to the ablation electrode 60 in a manner described above with reference to the connection between the proximal insulated wire and the proximal electrode body 62.

To facilitate the installation of the distal electrode 50, in some embodiments of the present invention, the distal electrode 50 includes a distal seat 51 connected to an end of the balloon 20 away from the catheter 10, and a distal electrode body 52 sleeved on a peripheral wall of the distal seat 51.

Specifically, the distal socket 51 is disposed cylindrically, the distal electrode body 52 is disposed annularly, the distal electrode 50 is sleeved on the outer peripheral wall of the distal socket 51, and the connection between the distal electrode body 52 and the distal socket 51 is set according to the connection between the proximal electrode body 62 and the proximal socket 61.

The end of the balloon 20 remote from the catheter 10 is connected to the distal seat 51, and may be connected by heat fusion, ultrasound, or the like, so as to stabilize the connection between the balloon 20 and the distal seat 51.

Further, in order to facilitate the electrical connection between the distal electrode body 52 and the ablation generator, a portion of the outer peripheral wall of the distal seat 51, which faces the distal electrode body 52, penetrates through to a position where the distal seat 51 is connected with the balloon 20 to form a distal wire passing hole, the distal wire passing hole is communicated with the cavity of the balloon 20, the distal electrode body 52 is connected with a distal insulated wire, and the distal insulated wire sequentially passes through the distal wire passing hole, the cavity and a wire passing channel on the catheter 10, and then extends out of the proximal end of the catheter 10 and is electrically connected with the external ablation generator. The distal insulated wire is connected to the distal electrode body 52 in a manner described above with reference to the connection between the proximal insulated wire and the proximal electrode body 62.

To facilitate the distal electrode 50, the proximal electrode 60, and the balloon 20 to be inserted together into the body of the target organism, in some embodiments of the utility model, the diameter of the distal seat 51 is greater than or equal to the diameter of the proximal seat 61 and the diameter of the balloon 20 when deflated is less than or equal to the diameter of the distal seat 51.

In particular, the diameter of the distal seat 51 is equal to the diameter of the proximal seat 61, and the axis of the balloon 20, the axis of the distal seat 51 and the axis of the proximal seat 61 are arranged in coincidence.

In some embodiments of the present invention, the distal seat 51 is made of a transparent material, and a micro-camera is disposed in the distal seat 51; and/or the proximal seat 61 is made of transparent material, and a micro camera is arranged in the proximal seat 61. By the arrangement, the ablation condition of the target biological tissue can be checked in real time through the miniature camera during ablation, and the control catheter 10 can be conveniently observed to enter the tissue to be ablated.

Specifically, the transparent material may be transparent plastic, transparent silicone, and the like, and is not limited herein.

It should be noted that, when the distal seat 51 is made of a transparent material, and a micro camera is disposed in the distal seat 51, the interior of the distal seat 51 is hollow to form a distal installation cavity, the micro camera is installed in the distal installation cavity, the micro camera may be a side facing the distal seat 51 and facing away from the balloon 20, or a peripheral wall facing the distal seat 51, at this time, referring to fig. 2, the distal electrode body 52 partially covers the distal seat 51, and the peripheral wall of the micro camera facing the distal seat 51 is not covered by the distal electrode body 52. Similarly, when the proximal holder 61 is made of a transparent material and the micro-camera is disposed in the proximal holder 61, the proximal electrode body 62 partially covers the proximal holder 61, and the micro-camera faces a position where the outer peripheral wall of the proximal holder 61 is not covered by the proximal electrode body 62.

To extend the range of view available to a miniature camera, in some embodiments of the present invention, the miniature camera includes a camera body and a miniature wide-angle lens coupled to the camera body.

In some embodiments of the present invention, a plurality of ablation electrodes 30 are spaced circumferentially about balloon 20, with equal spacing between each ablation electrode 30 and proximal electrode 60. According to the arrangement, the channel-type tissue to be ablated is conveniently ablated, the ablation effect can be ensured to meet the expected effect, the size of an ablation zone can be minimized as small as possible, and the tissue which is not necessary to be ablated is prevented from being ablated.

In some embodiments of the present invention, the peripheral wall of the balloon 20 is provided with two mapping electrodes 70 at the position where the deformation amount is maximum when the balloon 20 is inflated, the two mapping electrodes 70 are symmetrically arranged about the axis of the balloon 20, and each mapping electrode 70 is spaced apart from the ablation electrode 30. So configured, the pulmonary vein activity detected by the mapping electrode 70 can be ablated and monitored simultaneously. Each mapping electrode 70 is connected to the mapping generator by a mapping insulated wire, and the specific connection manner is set according to the connection manner between the ablation electrode 30 and the ablation generator in the above embodiment.

In some embodiments of the present invention, the peripheral wall of the balloon 20 is provided with a pressure sensor 80 at a position where the deformation amount is maximum when the balloon 20 is inflated.

Preferably, the two pressure sensors 80 are symmetrically disposed about the axis of the capsule 20, so as to facilitate the detection of the pressure of the target biological tissue.

In some embodiments of the utility model, the ablation device 100 further includes a steering handle in communication with the proximal end of the catheter 10 to control the inflation or deflation of the balloon 20.

In particular, the steering handle is provided with a channel communicating with the distal end of the catheter 10, through which the collision or contraction of the control balloon 20 can be achieved in connection with an external inflation or filling device. In addition, an inflation device may be directly disposed on the control handle to inflate or deflate the balloon 20 to control the inflation or deflation of the balloon 20, or an inflation device may be disposed on the control handle to inflate or release the balloon 20 to control the inflation or deflation of the balloon 20. The inflation device and the liquid filling device belong to the mature technology in the field, and are not described in detail.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An ablation device comprising a catheter, a balloon, a plurality of ablation electrodes, a plurality of memory support rods, a distal electrode, and a proximal electrode; wherein the content of the first and second substances,

2. The ablation device of claim 1, wherein the number of said memory support rods is at least three, and at least three of said memory support rods are evenly spaced along the circumference of said balloon.

3. The ablation device of claim 1, wherein the proximal electrode comprises a proximal hub and a proximal electrode body, each of which is annularly disposed, the proximal hub being disposed around the distal end of the catheter, and the proximal electrode body being disposed around an outer peripheral wall of the proximal hub.

4. The ablation device of claim 3, wherein said distal electrode includes a distal hub connected to an end of said balloon distal from said catheter and a distal electrode body mounted about a peripheral wall of said distal hub.

5. The ablation device of claim 4, wherein a diameter of the distal hub is greater than or equal to a diameter of the proximal hub and a diameter of the balloon when deflated is less than or equal to the diameter of the distal hub.

6. The ablation device of claim 5, wherein said distal hub is made of a transparent material, and a miniature camera is disposed within said distal hub;

7. The ablation device of claim 6, wherein the miniature camera head comprises a camera head body and a miniature wide angle lens coupled to the camera head body.

8. The ablation device of claim 1, wherein the outer peripheral wall of the balloon is provided with two mapping electrodes at locations where the amount of deformation is greatest when the balloon is inflated, the two mapping electrodes being symmetrically disposed about the axis of the balloon, each mapping electrode being spaced apart from the ablation electrode.

9. The ablation device of claim 1, wherein said peripheral wall of said balloon is provided with a pressure sensor at a location where the amount of deformation is greatest when said balloon is inflated.

10. The ablation device of claim 1, further comprising a steering handle in communication with the proximal end of the catheter for controlling inflation or deflation of the balloon.