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Local pulsed electric field ablation electrode catheter

A pulsed electric field and ablation electrode technology, which is applied in surgical navigation systems, parts of surgical instruments, medical science, etc., can solve problems such as difficult concentration of catheters, achieve precise ablation, shorten operation time, and reduce complications

Active Publication Date: 2021-11-16
四川锦江电子医疗器械科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]1. It is difficult for the catheter to accurately, centrally and locally apply the high-voltage pulse energy source to the target tissue
[0007]2. The effective electrodes under the action of the pulsed electric field are at least two electrodes with opposite polarities. How to arrange multiple electrodes in local areas to adapt to various complex and fine Organizational structure is a pressing issue

Method used

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  • Local pulsed electric field ablation electrode catheter
  • Local pulsed electric field ablation electrode catheter
  • Local pulsed electric field ablation electrode catheter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 , figure 2 , the ablation electrode catheter is mainly composed of an ablation tip 1, a proximal tube body 3, and a handle assembly 9, the ablation tip 1 is arranged at the distal end of the proximal tube body 3, a tip electrode 11, a ring electrode A12, a ring electrode B13, and a ring electrode C14 is distributed in the ablation head 1 in turn. The head electrode 11 is cylindrical, and the end face and side wall are chamfered to avoid safety problems such as excessive energy concentration and ionization during discharge due to sharp edges and corners. The ring electrode A12 and the head electrode 11 Arranged at intervals of 0.5-3mm.

[0051] The electric field intensity is the largest on the surface of the electrode, and gradually decays outwards. At the same time, the field strength gradually decays from the electrode to the center of the electrode. In order to ensure that there is sufficient field strength in the depth and the electric field stre...

Embodiment 2

[0067] Such as Figure 9 , 9.1 with such Figure 10 , 10.1 As shown in Embodiment 2, the ablation electrode-anode 221 is located at the top of the multipolar ablation head end 22, and the ablation electrode-cathode (2221-222n) is evenly spaced and circularly distributed on the insulating member 23, and a high voltage is applied between the cathode and the anode For pulse energy, the area ratio K of the ablation electrode-cathode and the ablation electrode-anode 221 is selected to be 1-3, which can be configured according to adaptability to achieve an ideal depth. The design of Embodiment 2 mainly solves the problem of placing the ablation electrodes more concentratedly on the ablation head 1 to avoid damage to surrounding healthy tissues. In this design, the distance between cathode and anode is controlled between 0.5-3mm, the number of anode is one, and the number of cathodes is multiple. In order to ensure greater safety, the surface area of ​​a single cathode can be equa...

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Abstract

The invention relates to the field of medical electrophysiological catheter technology and heart electrophysiological ablation, in particular to a local pulsed electric field ablation electrode catheter which comprises an ablation head end 1, a near-end catheter body 3 and a handle assembly 9, the ablation head end 1 is connected with the handle assembly 9 through the near-end catheter body 3, the ablation head end 1 comprises a head electrode 11, matching electrodes and a supporting catheter body 2, the head electrode 11 is attached to the farthest end of the supportingcatheter body 2, the matching electrodes are arranged on the supporting tube body 2 at a preset interval distance, and the head electrode 11 and the matching electrodes are matched to generate a high-voltage pulsed electric field; the area ratio K of the surface area of the head electrode 11 to the surface area of the matching electrodes is 1 < = K < = 3. The ablation head end applies a high-voltage pulse energy source to a target tissue, efficient and accurate ablation is achieved, and the catheter with the ablation head end can reach various complex, fine and closed tissue structures and tissue interiors of the tissue structures.

Description

technical field [0001] The invention relates to the field of medical electrophysiological catheter technology and cardiac electrophysiological ablation, in particular to a local pulse electric field ablation electrode catheter. Background technique [0002] As an efficient and safe ablation energy source, pulsed electric field has been studied by scholars at home and abroad. In recent years, pulsed electric field technology has made great progress, especially in the field of tumor ablation. direction of external research. [0003] Pulsed electric field technology is to apply a brief high voltage to the tissue to generate a local high electric field of hundreds of volts per centimeter, which destroys the cell membrane by creating pores in the cell membrane. An applied electric field at the membrane greater than the cellular threshold causes the pore not to close, and this electroporation is irreversible, thereby allowing the exchange of biomolecular material across the membr...

Claims

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Application Information

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IPC IPC(8): A61B18/12A61B18/14A61B34/20
CPCA61B18/12A61B18/1492A61B34/20A61B2018/00351A61B2018/00595A61B2018/1407A61B2018/1467A61B2018/00714A61B2018/00035A61B2034/2051
Inventor 朱晓林
Owner 四川锦江电子医疗器械科技股份有限公司
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