CN-121987321-A - Balloon catheter, catheter electrode assembly and flexible circuit board of catheter electrode assembly

Abstract

The invention relates to the field of electrophysiology catheters, in particular to a balloon catheter, a catheter electrode assembly and a flexible circuit board of the catheter electrode assembly. The flexible circuit board of the catheter electrode assembly comprises an insulating substrate, an electrode sheet, a conductive line and a line insulating layer, wherein the insulating substrate is used for being attached to the surface of a balloon body of a balloon catheter, the electrode sheet is fixed on the insulating substrate and used for transmitting electric energy, the conductive line is attached to the surface of the insulating substrate and connected with the electrode sheet to achieve electric energy transmission, the line insulating layer is arranged corresponding to the conductive line and covers the conductive line, and the insulating substrate is provided with an exposed area which is not covered by the line insulating layer. The invention mainly solves the technical problem that the flexible circuit board of the catheter electrode assembly is easy to separate from the capsule body, and the flexible circuit board can limit the capsule body to shrink to form a smaller diameter.

Inventors

• 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. 1. A flexible circuit board of a catheter electrode assembly, comprising: The insulation matrix is used for being attached to the surface of the balloon body of the balloon catheter; The electrode plate is fixed on the insulating substrate and used for transmitting electric energy; the conductive circuit is attached to the surface of the insulating substrate and is connected with the electrode plate to realize electric energy transmission; and a line insulating layer provided corresponding to the conductive line, the line insulating layer covering the conductive line, the insulating base having an exposed area not covered by the line insulating layer.
2. 2. The flexible circuit board of claim 1, wherein the electrode pad comprises a first pole piece and a second pole piece, the conductive trace comprises a first trace and a second trace, the first trace and the second trace being connected to the first pole piece and the second pole piece, respectively; The first circuit is positioned at one side of the insulating substrate, which is provided with the electrode plate, the second circuit is positioned at one side of the insulating substrate, which is opposite to the electrode plate, the second circuit and the first electrode plate are connected in a conductive way by means of a conductive structure penetrating through the insulating substrate, and the first circuit and the second circuit extend to one end of the insulating substrate along the arrangement direction of the first electrode plate and the second electrode plate.
3. 3. The flexible circuit board of claim 2, wherein at least a portion of the first and second traces have a spacing in a width direction of the flexible circuit board.
4. 4. The flexible circuit board of claim 2, wherein the flexible circuit board includes a pad secured to the insulating substrate, the pad being connected to an end of the conductive trace remote from the electrode pad, the pad being for wire bonding to transmit electrical energy.
5. 5. The flexible circuit board of claim 4, wherein the first pad to which the first wire is connected and the second pad to which the second wire is connected are located on the same surface of the insulating substrate.
6. 6. The flexible circuit board of claim 4, wherein the flexible circuit board includes an extraction portion disposed at a proximal end of the flexible circuit board, the extraction portion for extraction of the conductive traces, the extraction portion having a width that is less than a width of an adjacent portion, the solder pad disposed on the extraction portion.
7. 7. The flexible circuit board of any of claims 1 to 6, wherein the flexible circuit board comprises a proximal portion, a distal portion, and an intermediate connection portion, the proximal portion and the distal portion being for being disposed on a proximal side and a distal side of the balloon, respectively, the intermediate connection portion being connected between the proximal portion and the distal portion, the intermediate connection portion having a width that is less than a width of the proximal portion and the distal portion, the electrode pad comprising a proximal electrode pad disposed on the proximal portion and a distal electrode pad disposed on the distal portion, the conductive trace to which the distal electrode pad is connected passing through the intermediate connection portion.
8. 8. The flexible circuit board according to any one of claims 1 to 6, wherein the electrode sheet is attached to a surface of the insulating base body, the flexible circuit board includes an edge insulating layer provided corresponding to an edge of the electrode sheet, the shape of the edge insulating layer conforming to the shape of the edge of the electrode sheet, the edge insulating layer has an electrode covering portion covering the edge surface of the electrode sheet and a base connecting portion forming a stepped structure with the electrode covering portion for matching a thickness of the edge of the electrode sheet, the base connecting portion is connected to the insulating base body.
9. 9. A catheter-electrode assembly, comprising: A balloon, the balloon being expandable and contractible; and a flexible circuit board, the flexible circuit board being the flexible circuit board of any one of claims 1 to 8.
10. 10. A balloon catheter, comprising: An operation handle; An insertion tube connected to a distal end of the operation handle; And a catheter electrode assembly connected to the distal end of the insertion tube, the catheter electrode assembly including a balloon that is expandable and contractible, and a flexible circuit board attached to the balloon, the flexible circuit board being the flexible circuit board according to any one of claims 1 to 8.

Description

Balloon catheter, catheter electrode assembly and flexible circuit board of catheter electrode assembly Technical Field The invention relates to the field of electrophysiology catheters, in particular to a balloon catheter, a catheter electrode assembly and a flexible circuit board of the catheter electrode assembly. 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. Pulsed electric field ablation may be achieved through balloon catheters. An important component in balloon catheters is a catheter electrode assembly, which comprises a balloon body and a flexible circuit board fixed on the surface of the balloon body, wherein the balloon body can provide support for the flexible circuit board and position the flexible circuit board, and an electrode plate is arranged on the flexible circuit board and can be used for forming a pulse electric field. However, in the process of repeatedly inflating and deflating the balloon, a separation phenomenon is easy to occur between the flexible circuit board and the balloon body. In addition, the flexible circuit board also limits the smaller diameter of the balloon after contraction. Disclosure of Invention The invention mainly solves the technical problems that the flexible circuit board of the catheter electrode assembly is easy to separate from the balloon body, and the flexible circuit board can limit the balloon body to form a smaller diameter after shrinkage. In a first aspect, in one embodiment a flexible circuit board for a catheter-electrode assembly is provided. A flexible circuit board of a catheter electrode assembly, comprising: The insulation matrix is used for being attached to the surface of the balloon body of the balloon catheter; The electrode plate is fixed on the insulating substrate and used for transmitting electric energy; the conductive circuit is attached to the surface of the insulating substrate and is connected with the electrode plate to realize electric energy transmission; and a line insulating layer provided corresponding to the conductive line, the line insulating layer covering the conductive line, the insulating base having an exposed area not covered by the line insulating layer. In one embodiment, the electrode sheet comprises a first electrode sheet and a second electrode sheet, the conductive circuit comprises a first circuit and a second circuit, and the first circuit and the second circuit are respectively connected with the first electrode sheet and the second electrode sheet; The first circuit is positioned at one side of the insulating substrate, which is provided with the electrode plate, the second circuit is positioned at one side of the insulating substrate, which is opposite to the electrode plate, the second circuit and the first electrode plate are connected in a conductive way by means of a conductive structure penetrating through the insulating substrate, and the first circuit and the second circuit extend to one end of the insulating substrate along the arrangement direction of the first electrode plate and the second electrode plate. In one embodiment, at least a portion of the first and second wires have a spacing in a width direction of the flexible circuit board. In one embodiment, the flexible circuit board includes a pad fixed on the insulating substrate, the pad is connected with one end of the conductive line away from the electrode sheet, and the pad is used for wire bonding to transmit electric energy. In one embodiment, the first pad to which the first wire is connected and the second pad to which the second wire is connected are located on the same surface of the insulating substrate. In one embodiment, the flexible circuit board includes an extraction portion disposed at a proximal end of the flexible circuit board, the extraction portion for extraction of the conductive traces, the extraction portion having a width that is less than a width of an adjacent portion, the solder pad disposed on the extraction portion. In one embodiment, the flexible circuit board comprises a proximal portion, a distal portion and an intermediate connection portion, wherein the proximal portion and the distal portion are respectively arranged on the proximal side and the distal side of the capsule body, the intermediate connection portion is connected between the proximal portion and the distal portion, the width of the intermediate connection portion is smaller tha