CN-121987217-A - Catheter electrode assembly of electrophysiology catheter, electrophysiology catheter and catheter system

CN121987217ACN 121987217 ACN121987217 ACN 121987217ACN-121987217-A

Abstract

The invention relates to the field of electrophysiology catheters, in particular to a catheter electrode assembly of an electrophysiology catheter, the electrophysiology catheter and a catheter system. A catheter electrode assembly of an electrophysiology catheter comprises a balloon body capable of being filled and contracted, the balloon body is provided with an equatorial position with the largest diameter after filling, a proximal position located on the proximal side of the equatorial position and a distal position located on the distal side of the equatorial position, the diameter of the balloon body is gradually reduced from the equatorial position to the proximal end of the balloon body and the distal end of the balloon body respectively, and an electrode region exposed on the surface of the catheter electrode assembly and used for transmitting electric energy, the electrode region comprises a proximal end region located on the proximal position and a distal end region located on the distal position, and a partition area is arranged on the proximal end region and/or the distal end region and divides the electrode region into at least two mutually insulated pole pieces. The invention mainly solves the technical problem of how to enable the electrophysiology catheter to be better compatible with mapping and ablation.

Inventors

Ren Jianding
HUANG LONG
CHEN HAO
SONG QING
FENG JUN

Assignees

心航路医学科技(广州)有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (10)

1. A catheter electrode assembly of an electrophysiology catheter, comprising: A balloon which is inflatable and deflatable, the balloon having an equatorial region of maximum diameter after inflation, a proximal region on a proximal side of the equatorial region, and a distal region on a distal side of the equatorial region, the balloon having a diameter which decreases from the equatorial region to the balloon proximal and balloon distal ends, respectively; And an electrode region exposed at a surface of the catheter electrode assembly, the electrode region for transmitting electrical energy, the electrode region comprising a proximal region located on the proximal site, a distal region located on the distal site; And a partition area is arranged on the proximal end area and/or the distal end area, and divides the electrode area into at least two mutually insulated pole pieces.
2. The catheter-electrode assembly of claim 1, wherein the partitions are arranged along a surface profile of the catheter-electrode assembly; The segments extend in a proximal-distal direction, the segments causing the pole pieces of the respective electrode regions to be arranged at intervals along the balloon circumference, or the segments extend along the surface of the catheter-electrode assembly in a direction intersecting the proximal-distal direction, causing the pole pieces of the respective electrode regions to be arranged at intervals along the proximal-distal direction.
3. The catheter electrode assembly of claim 2, wherein the proximal region forms a proximal taper that tapers from a distal end side to a proximal end side along a circumferential dimension of the balloon, wherein the distal region forms a distal taper that tapers from a proximal end side to a distal end side along a circumferential dimension of the balloon, and wherein the dividing region extends in a proximal-distal direction dividing the electrode region into two pole pieces.
4. The catheter electrode assembly of claim 3 wherein the proximal and distal ends of said proximal region are each arcuate, said proximal taper is located between said arcuate shapes at both ends, said dividing region passes intermediate the arcuate lengths of said arcuate shapes, and/or wherein the proximal and distal ends of said distal region are each arcuate shapes, said distal taper is located between said arcuate shapes at both ends, said dividing region passes intermediate the arcuate lengths of said arcuate shapes.
5. The catheter-electrode assembly of claim 1,2 or 3, wherein the catheter-electrode assembly comprises at least two flexible circuit boards circumferentially distributed along the balloon, the flexible circuit boards being attached to the balloon, the electrode regions being disposed on the flexible circuit boards, the flexible circuit boards comprising a proximal portion, a distal portion, and a connecting portion connected between the proximal and distal portions, the proximal region being disposed on the proximal portion, the distal region being disposed on the distal portion.
6. The catheter-electrode assembly of claim 5, wherein the number of flexible circuit boards is 2 to 8.
7. A catheter electrode assembly according to claim 1,2 or 3, wherein the width of the dividing region is less than the width of the pole piece from which the dividing region is divided.
8. A catheter electrode assembly according to claim 1,2 or 3, wherein the catheter electrode assembly comprises an insulating material, the entire peripheral edge of the pole piece being covered by the insulating material, and/or the dividing region being covered by the insulating material.
9. A balloon catheter, comprising: An operation handle; An insertion tube connected to a distal end of the operation handle; and a catheter electrode assembly according to any one of claims 1 to 8, which is attached to the distal end of the insertion tube.
10. A catheter system, comprising: The balloon catheter of claim 9; The ablation host machine or the mapping host machine is used for being connected with the operating handle so as to transmit electric energy with the pole piece; When the balloon catheter is connected with the ablation host, the balloon catheter has an ablation working mode, and in the ablation working mode, for a proximal end region and a corresponding distal end region which are arranged along the proximal and distal ends of the balloon body, the polarity of a connecting line connected with the proximal end region is opposite to the polarity of a connecting line connected with the proximal end region; when the balloon catheter is connected with the mapping host, the balloon catheter has a mapping working mode, and in the mapping working mode, the polarities of connecting lines connected with pole pieces positioned on two sides of the same partition area in the width direction are opposite.

Description

Catheter electrode assembly of electrophysiology catheter, electrophysiology catheter and catheter system Technical Field The invention relates to the field of electrophysiology catheters, in particular to a catheter electrode assembly of an electrophysiology catheter, the electrophysiology catheter and a catheter system. Background Atrial fibrillation, abbreviated as atrial fibrillation, is the most common clinical arrhythmia, and its incidence increases gradually with age. Currently, catheter ablation has become an important treatment modality for atrial fibrillation. The pulse electric field ablation is a new tissue ablation means based on physical energy factors, which mainly uses the irreversible electroporation principle, and the cell membrane is perforated irreversibly by the action of the high-voltage pulse electric field on the cell, so that the cell gradually necroses, and finally the tissue ablation purpose is realized. The electrophysiology catheter can be used for detecting and treating arrhythmia, and is provided with electrodes, so that the electrophysiology catheter can be used for recording the electrical signals of the heart and realizing mapping, thereby helping doctors to identify abnormal heart electrical activity modes, determine the cause of arrhythmia and formulate a treatment scheme. For cardiac mapping, it is often necessary to consider how to place a greater number of electrodes on the electrophysiology catheter to obtain a more accurate detection result. For the ablation of the target tissue, the surface area of the electrode needs to be increased in some cases, so as to avoid the damage caused by the too concentrated energy of the electrode slice when the ablation current is transmitted, and to be beneficial to obtaining a more uniform electric field. Disclosure of Invention The invention mainly solves the technical problem of how to enable the electrophysiology catheter to be better compatible with mapping and ablation. In a first aspect, in one embodiment there is provided a catheter electrode assembly of an electrophysiology catheter. A catheter electrode assembly of an electrophysiology catheter, comprising: A balloon which is inflatable and deflatable, the balloon having an equatorial region of maximum diameter after inflation, a proximal region on a proximal side of the equatorial region, and a distal region on a distal side of the equatorial region, the balloon having a diameter which decreases from the equatorial region to the balloon proximal and balloon distal ends, respectively; And an electrode region exposed at a surface of the catheter electrode assembly, the electrode region for transmitting electrical energy, the electrode region comprising a proximal region located on the proximal site, a distal region located on the distal site; And a partition area is arranged on the proximal end area and/or the distal end area, and divides the electrode area into at least two mutually insulated pole pieces. In one embodiment, the partitions are arranged along a surface profile of the catheter-electrode assembly; The segments extend in a proximal-distal direction, the segments causing the pole pieces of the respective electrode regions to be arranged at intervals along the balloon circumference, or the segments extend along the surface of the catheter-electrode assembly in a direction intersecting the proximal-distal direction, causing the pole pieces of the respective electrode regions to be arranged at intervals along the proximal-distal direction. In one embodiment, the proximal region forms a proximal taper structure, the proximal taper structure gradually narrows from a distal end side to a proximal end side along the circumferential dimension of the balloon, the distal region forms a distal taper structure, the distal taper structure gradually narrows from the proximal end side to the distal end side along the circumferential dimension of the balloon, and the dividing region extends in the proximal-distal direction to divide the electrode region into two pole pieces. In one embodiment, the proximal and distal ends of the proximal region are each arc-shaped, the proximal gradual change structure is located between the arcs at the two ends, the dividing region passes through the middle of the arc length of the arc-shaped, and/or the proximal and distal ends of the distal region are each arc-shaped, the distal gradual change structure is located between the arcs at the two ends, and the dividing region passes through the middle of the arc length of the arc-shaped. In one embodiment, the catheter electrode assembly comprises at least two flexible circuit boards distributed along the circumferential direction of the balloon, the flexible circuit boards are attached to the balloon, the electrode areas are arranged on the flexible circuit boards, the flexible circuit boards comprise a proximal end part, a distal end part and a connecting part connected between the proximal end