CN115969508A - Annular mapping and ablation catheter and system - Google Patents
Annular mapping and ablation catheter and system Download PDFInfo
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- CN115969508A CN115969508A CN202310049516.4A CN202310049516A CN115969508A CN 115969508 A CN115969508 A CN 115969508A CN 202310049516 A CN202310049516 A CN 202310049516A CN 115969508 A CN115969508 A CN 115969508A
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Abstract
The invention relates to a ring mapping and ablation catheter and a system thereof in the technical field of myocardial ablation, comprising a head end, a tube body, a moving inner tube and a handle; the head end comprises a plurality of electrode arms, a ring electrode and a guide cap, wherein each electrode arm comprises a proximal part, a middle part and a distal part; one end of the proximal part is connected with the middle part, and the other end of the proximal part is connected with the inner moving pipe; one end of the distal part is arranged on the middle part, and the other end is connected with the guide cap; the ring electrode is disposed on the middle portion; the moving inner tube is telescopically arranged in the tube body, one end of the moving inner tube is connected with the handle, and the other end of the moving inner tube is connected with the guide cap; the electrode arm is made of flexible memory material. The catheter provided by the invention is provided with a plurality of electrode arms and has mapping and ablation functions, so that the annular head end can be controllably and freely adjusted to adapt to pulmonary vein orifices with complicated and changeable shapes and sizes, and the mapping catheter does not need to be additionally arranged or exchanged in the ablation process, thereby shortening the operation time and reducing the pain of patients.
Description
Technical Field
The invention relates to the technical field of cardiac ablation, in particular to a ring mapping and ablation catheter and a ring mapping and ablation system.
Background
The cardiac mapping and ablation catheter is widely applied to medical treatment, particularly to the practice of cardiac electrophysiology, and mainly achieves the purposes of mapping, diagnosing and ablating atrial fibrillation on cardiac diseases by means of different degrees of attachment of a head end to tissues in a cardiac cavity, recording electrophysiology signals and delivering ablation energy.
In the ablation treatment of patients with atrial fibrillation, pulmonary vein isolation is the most common mode, namely, the pulmonary vein is electrically isolated from the left atrium by forming adjacent annular ablation irreversible lesions around the pulmonary vein ostium attachments, abnormal interference electric signals generated in the pulmonary vein are prevented from being transmitted to the left atrium, and irregular beating of the heart is avoided.
At present, the electrode on the most commonly used catheter with a single-electrode-arm circular ring structure cannot keep good contact with tissues, because of differences of individual anatomical structures, the single-electrode-arm circular ring is difficult to adapt to the shape and the size of a complicated and changeable pulmonary vein orifice, and cannot be ensured to be well attached to a cavity structure during mapping and ablation, and poor attachment not only affects the operation efficiency of a doctor, but also can cause irreversible damage to healthy tissues around an abnormal potential focus.
For example, a single-electrode arm spiral loop catheter disclosed in patent document No. 202210806712.7 (see fig. 1 of the specification) can gradually press against the pulmonary vein ostium through the spiral loop when fitting against the ostium to make the fitting effect better to some extent. However, when the pulmonary vein is irregular, the shape of the spiral ring is difficult to maintain, which is not favorable for continuous effective contact, and the single-arm spiral ring is easy to twist when entering the pulmonary vein lumen.
In addition, in the prior art, an additional mapping catheter is usually required to be placed for mapping and then ablation treatment is performed, so that the use number or the exchange frequency of different electrode catheters in the ablation process is increased, the operation time is prolonged, and the pain of a patient is increased.
Disclosure of Invention
In order to solve the technical problems that the mapping catheter needs to be additionally implanted or exchanged in the ablation process, and the pain of a patient is increased due to the overlong operation time, the invention discloses a ring-shaped mapping and ablation catheter and a ring-shaped mapping and ablation system. In the ablation process, a mapping catheter does not need to be additionally arranged or exchanged, the operation time is shortened, and the pain of a patient is reduced, and the technical scheme of the invention is implemented as follows:
a ring mapping and ablating catheter, which comprises a head end, a tube body, a moving inner tube and a handle; the head end comprises a plurality of electrode arms, a ring electrode and a guide cap;
the electrode arm includes a proximal portion, an intermediate portion, and a distal portion;
one end of the proximal part is connected with the middle part, and the other end of the proximal part is connected with the inner moving pipe;
the distal end part is arranged on the middle part at one end, and the other end is connected with the guide cap;
the ring electrode is disposed on the middle portion;
the motion inner tube is telescopically arranged in the tube body, one end of the motion inner tube is connected with the handle, and the other end of the motion inner tube is connected with the guide cap;
the electrode arm is made of flexible memory material.
Preferably, the number of ring electrodes is 2-10.
Preferably, the intermediate portion is annular in shape and has a diameter of 8mm to 30mm.
Preferably, a tube body electrode is arranged on the tube body;
preferably, an electromagnetic sensor is arranged on the pipe body;
preferably, the outer diameter of the pipe body is 2.00mm-4.00mm.
Preferably, the handle comprises a movement mechanism and a push-pull member;
the motion mechanism is arranged in the handle and connected with the motion inner tube, and the push-pull piece is arranged on the surface of the handle and connected with the motion mechanism.
Preferably, a limiting mechanism is arranged on the movement inner tube.
Preferably, the outer surface of the electrode arm is wrapped by a flexible polymer insulating layer, and the thickness of the flexible polymer insulating layer is 25-300 μm.
A lasso mapping and ablation system comprising a lasso mapping and ablation catheter, an extension cord, a console, and a display;
one end of the extension line is connected with the control handle, the other end of the extension line is connected with the control console, and the control console is connected with the display.
The ring mapping and ablation catheter of the invention is provided with a plurality of electrode arms and a moving inner tube which penetrates through the whole catheter body and is connected with the guide cap, and the axial movement of the moving inner tube is controlled by stirring the handle. The catheter has the functions of mapping and ablation, and can effectively reduce the using quantity or the exchange frequency of different electrode catheters in the process of ablation or mapping. When the catheter contacts with the pulmonary vein vestibule or the lumen with regular shape and size, the catheter realizes effective attachment through the regular annular head ends supported by the electrode arms to keep the electrodes in effective contact with tissues, and improves the efficiency and accuracy of ablation or mapping. When the electrode arms contact with the pulmonary vein vestibule or lumen tissue with irregular shape and size, the electrode arms flexibly change to actively adapt to the change of the tissue profile, so that excessive sticking or poor sticking to the tissue can be reduced, the heart cannot be squeezed to cause deformation or damage, and irreversible damage to healthy tissue around a focus caused by poor sticking of the electrodes can be avoided. The head end electrode arm of the catheter adopts a flexible material with a shape memory function, keeps a compressed state in the conveying and withdrawing processes, and has small conveying or withdrawing resistance; under the working state, the radial supporting force or the chronic outward force of the head end can be controlled in a reasonable interval by adjusting the electrode arm.
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 one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a spiral loop catheter used in the prior art;
FIG. 2 is a block diagram of an embodiment of a circumferential mapping and ablation catheter;
FIG. 3 is a schematic structural view of an embodiment of a head end and a tube body;
FIG. 4 is a schematic top view of an embodiment of a header;
FIG. 5 is a schematic view of a configuration of an embodiment of a loop mapping and ablation catheter against a lumen;
FIG. 6 is a schematic view of a configuration of an embodiment of a ring mapping and ablation catheter configured to be placed against an irregular lumen;
fig. 7 is a schematic structural view of an embodiment of a ring mapping and ablation system.
In the above drawings, the reference numerals denote:
1, a head end;
1-1, an electrode arm;
1-11, proximal portion;
1-12, middle part;
1-13, a distal portion;
1-2, ring electrode;
1-3, a guide cap;
2, a tube body;
3, moving the inner tube;
3-1, a limiting mechanism;
4, a tube body electrode;
5, an electromagnetic sensor;
6, a handle;
6-1, a movement mechanism;
6-2, a push-pull piece;
7, an extension line;
8, a display;
and 9, a console.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention and the accompanying drawings, 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.
Example 1
In a specific embodiment 1, as shown in fig. 2-6, an annular mapping and ablation catheter includes a tip 1, a tube 2, a moving inner tube 3, and a handle 6; the head end 1 comprises a plurality of electrode arms 1-1, ring electrodes 1-2 and guide caps 1-3;
each electrode arm 1-1 includes a proximal portion 1-11, an intermediate portion 1-12, and a distal portion 1-13; "proximal" refers to the end of the surgical procedure that is closer to the operator, the "distal" is the end of the surgical procedure that is further from the operator, and "intermediate" refers to a location between the opposing "proximal" and "distal".
One end of the proximal part 1-11 is connected with the middle part 1-12, and the other end is connected with the inner moving pipe 3;
one end of the distal part 1-13 is arranged on the middle part 1-12, and the other end is connected with the guide cap 1-3;
the ring electrode 1-2 is disposed on the middle portion 1-12; the ring electrodes 1-2 are used for mapping and ablation, specifically, which ring electrodes 1-2 are used for ablation and which are used for mapping can be set according to actual surgical requirements, and the number of the ring electrodes 1-2 is 2-10. Wherein the number of the ring electrodes 1-2 used for mapping is 1-10, and the number of the ring electrodes 1-2 used for ablation is 1-4.
The moving inner tube 3 is telescopically arranged in the tube body 2, one end of the moving inner tube is connected with the handle 6, the other end of the moving inner tube is coaxially connected with the guide cap 1-3, and the moving inner tube and the tube body 2 perform limited coaxial movement to realize the shape transformation of the electrode arms 1-1 on the head end 1.
The middle part 1-12 is ring-shaped and has a diameter of 8mm-30mm.
The electrode arm 1-1 is made of flexible memory material. Comprises a metal material or a polymer with a shape memory function; the embodiment adopts nickel-titanium alloy, the nickel-titanium alloy is a memory alloy, the nickel-titanium alloy is kept in a compressed state in the conveying and withdrawing processes, and the conveying or withdrawing resistance is small; under the working state, the radial supporting force or the chronic outward force of the head end 1 can be controlled within a reasonable interval by adjusting the handle 6.
In the embodiment, the ring electrodes 1-2 emit radio frequency energy or pulse energy to realize ablation, and part or all of the ring electrodes 1-2 can be selected to acquire and map cardiac electrical signals.
The material of the moving inner tube 3 comprises a rigid metal tube or a polymer tube embedded with a metal material.
The moving inner tube 3 is connected with a rigid moving mechanism 6-1 in the handle 6, and the moving mechanism 6-1 is driven to move by stirring the push-pull piece 6-2 on the outer surface of the handle 6 to control the axial movement of the moving inner tube 3. The movement inner tube 3 at the head end 1 is provided with a limiting mechanism 3-1 to prevent the head end 1 from being over-stretched.
When the ablation or mapping is carried out in a regular lumen, the head end 1 is adjusted to reach or approach a regular ring shape, and when the ablation or mapping is carried out in an irregular lumen, the head end 1 is partially released by pushing the push-pull piece 6-2 to drive the moving inner tube 3 to move axially.
The outer surface of the electrode arm 1-1 is coated with a flexible polymer insulating material, in this embodiment, the material is TPU, and the thickness of the polymer coating layer is 25 μm-300 μm.
In this embodiment, when the electrode arm 1-1 is in the maximum release state, the head end 1 is formed in a regular ring shape, the length of the moving inner tube 3 in the head end 1 is the shortest, if the length of the moving inner tube 3 in the head end 1 is gradually increased, the electrode arm 1-1 is gradually released, and the head end 1 is in an irregular ring shape.
When the electrode arm 1-1 is abutted against irregular tissues, flexible deformation is generated, so that the head end 1 is in an irregular ring shape to maintain contact conformity.
The number of the electrode arms 1-1 is 2-12. In this embodiment, the number of the electrode arms 1-1 is even and the electrode arms are axially symmetrically distributed.
The proximal part 1-11 is connected and fixed with the tube body 2 by one of welding, bonding, crimping and welding.
The distal end portion 1-13 is fixedly connected to the guide cap 1-3 by one of welding, bonding, crimping and fusion.
In this embodiment, one end of the tube body 2 close to the head end 1 is bendable, and 1-6 unequal tube body electrodes 4 are distributed at the end to assist the accurate positioning of the electromagnetic sensor 5 arranged in the end.
In this embodiment, the mapping and ablation catheter has a gauge of between 2.00-4.00mm, i.e., 6F-12F.
Example 2
In a specific embodiment 2, as shown in fig. 7, a ring mapping and ablation system is characterized by comprising a ring mapping and ablation catheter, an extension wire 7, a console 9 and a display 8;
one end of the extension line 7 is connected with the control handle 6, the other end is connected with the console 9, and the console 9 is connected with the display 8. The system achieves mapping and ablation of the heart.
Claims (10)
1. A ring mapping and ablating catheter, which comprises a head end, a tube body, a moving inner tube and a handle; the electrode head is characterized in that the head end comprises a plurality of electrode arms, a ring electrode and a guide cap;
the electrode arm includes a proximal portion, an intermediate portion, and a distal portion;
one end of the proximal part is connected with the middle part, and the other end of the proximal part is connected with the inner moving pipe;
the distal end part is arranged on the middle part at one end, and the other end is connected with the guide cap;
the ring electrode is disposed on the middle portion;
the motion inner tube is telescopically arranged in the tube body, one end of the motion inner tube is connected with the handle, and the other end of the motion inner tube is connected with the guide cap;
the electrode arm is made of flexible memory material.
2. The cyclic mapping and ablation catheter of claim 1, wherein the intermediate portion is annular in shape and has a diameter of 8mm-30mm.
3. The lasso mapping and ablation catheter of claim 2, wherein the number of loop electrodes is 2-10.
4. The cyclic mapping and ablation catheter of claim 1, wherein a catheter body electrode and an electromagnetic sensor are disposed on the catheter body.
5. The cyclic mapping and ablation catheter of claim 1, wherein the number of electrode arms is 2-10.
6. The cyclic mapping and ablation catheter of claim 1, wherein the outer diameter of the catheter body is 2.00mm-4.00mm.
7. The mapping and ablation catheter of claim 1, wherein the handle 6 comprises a movement mechanism 6-1 and a push-pull 6-2;
the motion mechanism is arranged in the handle and connected with the motion inner tube, and the push-pull piece is arranged on the surface of the handle and connected with the motion mechanism.
8. The mapping and ablation catheter of claim 1, wherein a stop mechanism is disposed on the inner motion tube.
9. The lasso mapping and ablation catheter of claim 1, wherein the outer surface of the electrode arms is coated with a flexible polymeric insulating layer having a thickness of 25-300 μ ι η.
10. A ring mapping and ablation system comprising the ring mapping and ablation catheter of any of claims 1-9, an extension cord, a console, and a display;
one end of the extension line is connected with the control handle, the other end of the extension line is connected with the control console, and the control console is connected with the display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310049516.4A CN115969508A (en) | 2023-02-01 | 2023-02-01 | Annular mapping and ablation catheter and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310049516.4A CN115969508A (en) | 2023-02-01 | 2023-02-01 | Annular mapping and ablation catheter and system |
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| Publication Number | Publication Date |
|---|---|
| CN115969508A true CN115969508A (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310049516.4A Pending CN115969508A (en) | 2023-02-01 | 2023-02-01 | Annular mapping and ablation catheter and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117481790A (en) * | 2024-01-03 | 2024-02-02 | 梅奥心磁(杭州)医疗科技有限公司 | Double-ring high-density mapping ablation catheter |
| CN117481789A (en) * | 2024-01-03 | 2024-02-02 | 梅奥心磁(杭州)医疗科技有限公司 | Double-energy multifunctional electrophysiology catheter |
-
2023
- 2023-02-01 CN CN202310049516.4A patent/CN115969508A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117481790A (en) * | 2024-01-03 | 2024-02-02 | 梅奥心磁(杭州)医疗科技有限公司 | Double-ring high-density mapping ablation catheter |
| CN117481789A (en) * | 2024-01-03 | 2024-02-02 | 梅奥心磁(杭州)医疗科技有限公司 | Double-energy multifunctional electrophysiology catheter |
| CN117481789B (en) * | 2024-01-03 | 2024-04-02 | 梅奥心磁(杭州)医疗科技有限公司 | Double-energy multifunctional electrophysiology catheter |
| CN117481790B (en) * | 2024-01-03 | 2024-04-05 | 梅奥心磁(杭州)医疗科技有限公司 | Double-ring high-density mapping ablation catheter |
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