CN-121987334-A - Epicardial ablation catheter with half-sided ablation electrode and tortoise-backed balloon

CN121987334ACN 121987334 ACN121987334 ACN 121987334ACN-121987334-A

Abstract

The invention belongs to the field of medical instruments, and particularly relates to an epicardial ablation catheter with a half-face ablation electrode and a tortoise-back-shaped balloon. The epicardial ablation catheter with the half-face ablation electrode and the tortoise-back-shaped balloon body comprises a catheter with an inflation channel, the tortoise-back-shaped balloon body formed by a concave surface and a convex surface, wherein the concave surface of the balloon body is fixed on the side wall of the distal end of the catheter, the balloon body is communicated with the inflation channel, and a plurality of semi-ring electrodes arranged on the side wall of the distal end of the catheter, and the semi-ring electrodes are positioned on the concave surface side of the balloon body. When the epicardial ablation catheter with the half-face ablation electrode and the tortoiseshell-shaped balloon body is used, the balloon body expands to generate certain pressure on the half-ring electrode, so that the half-ring electrode is attached to and tightly pressed against a myocardial side point position to be ablated, the energy density is improved, and the ablation efficiency is greatly improved.

Inventors

OUYANG XINGDONG
LI CHAO
WANG JIANYANG

Assignees

武汉厚睿生医疗科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260121

Claims (10)

1. An epicardial ablation catheter having a half-sided ablation electrode and a tortoise-backed balloon, comprising: A conduit provided with an inflation channel; The concave surface and the convex surface form a tortoise-back-shaped bag body, the concave surface of the bag body is fixed on the side wall of the distal end of the catheter, and the bag body is communicated with the inflation channel; and a plurality of semi-ring electrodes arranged on the side wall of the distal end of the catheter, wherein the semi-ring electrodes are positioned on the concave side of the capsule body.
2. The epicardial ablation catheter with the half-sided ablation electrode and the tortoise-back-shaped balloon of claim 1, wherein the concave surface of the balloon is provided with a strip-shaped notch adapted to the extrados of the catheter, the catheter is disposed in the strip-shaped notch, and the half-ring electrode and the strip-shaped notch form a complete ring for housing the catheter.
3. The epicardial ablation catheter with a half-sided ablation electrode and a tortoise-back balloon of claim 1, wherein the convex surface is spherical and the concave surface is arcuate.
4. The epicardial ablation catheter with half-sided ablation electrodes and a tortoise-back balloon of claim 1, wherein the catheter sidewall in front of the balloon is provided with a number of ring electrodes.
5. The epicardial ablation catheter with half-sided ablation electrodes and a tortoise-back balloon of claim 1, wherein the half-ring electrodes are provided in two.
6. The epicardial ablation catheter with the half-sided ablation electrode and the tortoise-back balloon of claim 1, wherein the catheter is provided with a guidewire channel and further comprising a guidewire disposed within the guidewire channel.
7. The epicardial ablation catheter with half-sided ablation electrode and tortoise-back balloon of claim 6, further comprising a handle with a bi-directionally adjustable guidewire at the proximal end of the catheter, the handle having an inflation port in communication with the inflation channel, a guidewire inlet in communication with the guidewire channel, and a cable connector in communication with the half-sided electrode.
8. The epicardial ablation catheter with a half-sided ablation electrode and a tortoise-back balloon of claim 7, wherein the handle includes: the hollow handheld part is provided with an annular groove and a strip-shaped groove along the length direction on the inner wall of the handheld part; A hollow rotating part, one end of the rotating part is connected with the proximal end of the catheter, the other end of the rotating part is inserted into the handheld part, the side wall of the rotating part is provided with a bulge matched with the annular groove, and the inner wall of the other end of the rotating part is provided with an internal thread; and the screw rod is matched with the internal thread, one end of the screw rod is connected with the proximal end of the guide wire, and the other end of the screw rod is provided with a limiting part inserted into the strip-shaped groove.
9. The epicardial ablation catheter with the half-sided ablation electrode and the tortoise-back balloon of claim 7, wherein the outer sidewall of the rotating portion that is not inserted into the handpiece is provided with anti-slip features.
10. The epicardial ablation catheter with a half-sided ablation electrode and a tortoise-back balloon of claim 1, wherein the balloon is of a highly elastic memory polymer.

Description

Epicardial ablation catheter with half-sided ablation electrode and tortoise-backed balloon Technical Field The invention belongs to the field of medical instruments, and particularly relates to an epicardial ablation catheter with a half-face ablation electrode and a tortoise-back-shaped balloon. Background The complex arrhythmia is a cardiovascular disease which seriously threatens the life and health of human beings, has complex pathogenesis and rapid disease progress, often causes serious consequences such as palpitation, syncope and sudden death, and brings great challenges to clinical diagnosis and treatment. Among the treatment means, epicardial ablation has become an important core technology for treating complex arrhythmia by virtue of the accurate targeting effect of epicardial ablation on complex lesions, and provides a new treatment option for a plurality of patients with poor conventional treatment effect. However, the conventional epicardial ablation technique in clinical application still has a significant technical bottleneck, and the most critical problem is poor transmural ablation effect. Transmurality is one of core indexes for measuring success or failure of ablation treatment, and only if complete transmurality ablation of a focus area is realized, the conduction path of abnormal electric signals can be thoroughly blocked, so that the aim of radically treating arrhythmia is fulfilled. When the traditional electrode catheter is used for epicardial ablation, the traditional electrode catheter is limited by various factors such as catheter structural design, energy transfer efficiency, epicardial tissue environment and the like, and is difficult to stably and effectively form ablation damage penetrating through the whole myocardium, the transmutation rate is less than 70%, and the ablation is incomplete. The problem of insufficient wall penetration rate directly influences the clinical treatment effect, not only can cause arrhythmia recurrence rate to be high, but also can increase the risk of re-operation of patients, and aggravate the physical and psychological burden and medical cost of the patients. Therefore, how to perform structural optimization or functional improvement on the basis of the existing electrode catheter improves the epicardial ablation transmural performance of the electrode catheter, breaks through the limitation of the traditional technology, becomes a key technical problem to be solved urgently in the current cardiovascular interventional therapy field, and has important clinical significance and application value for promoting the development of complex arrhythmia therapy technology and improving the prognosis of patients. Disclosure of Invention The epicardial ablation catheter with the half-face ablation electrode and the tortoise-back-shaped balloon body provided by the invention can effectively solve the problems in the background technology. The invention provides an epicardial ablation catheter with a half-face ablation electrode and a tortoise-back-shaped balloon, comprising: A conduit provided with an inflation channel; The concave surface and the convex surface form a tortoise-back-shaped bag body, the concave surface of the bag body is fixed on the side wall of the distal end of the catheter, and the bag body is communicated with the inflation channel; and a plurality of semi-ring electrodes arranged on the side wall of the distal end of the catheter, wherein the semi-ring electrodes are positioned on the concave side of the capsule body. As a further optimization of the invention, the concave surface of the bag body is provided with a strip-shaped opening matched with the outer cambered surface of the catheter, the catheter is arranged in the strip-shaped opening, and the semi-ring electrode and the strip-shaped opening form a whole ring for sleeving the catheter. As a further optimization of the invention, the convex surface is spherical crown-shaped, and the concave surface is cambered surface-shaped. As a further optimization of the invention, the side wall of the catheter in front of the balloon is provided with a plurality of ring electrodes. As a further optimization of the invention, the half-ring electrode is provided with two. As a further optimization of the invention, the catheter is provided with a guide wire channel and also comprises a guide wire arranged in the guide wire channel. As a further optimization of the invention, the catheter also comprises a handle which is arranged at the proximal end of the catheter and can be used for bi-directionally bending the guide wire, wherein the handle is provided with an inflation interface communicated with the inflation channel, a guide wire inlet communicated with the guide wire channel and a cable connector connected with the semi-ring electrode. As a further optimization of the invention, the handle comprises: the hollow handheld part is provided with an annular groove and a strip-shaped groo