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Ablation catheter having pressure detecting function

An ablation catheter and functional technology, which is applied in the parts of surgical instruments, medical science, heating surgical instruments, etc., can solve the problems of small strain count value, affecting the measurement effect, and easy to cause fatigue, etc., so as to achieve proper elasticity and good detection effect , good effect of precise positioning

Active Publication Date: 2017-07-25
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

[0008] Secondly, there are also incomplete elastic body structures (such as hollow structures) to increase the elasticity of the elastic body, such as the minimally invasive CN201610651602 patent, but it still has the above problems. Although the deformation of the elastic body is larger, for a single The strain gauge measurement is more helpful, but there is always a lower limit for the reduction of the modulus of elasticity of the elastic body, and the above-mentioned "too soft" problem cannot occur. Then, relatively, the measurement effect of the strain gauge also has an upper limit. The current method , there will still be cases where the value reflected by the strain gauge is too small or missing, and the precise positioning of the catheter will be affected. At the same time, in actual use, this structure is prone to fatigue after being bent for a certain number of times. It will be very inaccurate and affect the measurement effect

Method used

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  • Ablation catheter having pressure detecting function
  • Ablation catheter having pressure detecting function
  • Ablation catheter having pressure detecting function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this embodiment, the application of the ablation catheter where the elastic body 5 is located is as follows: figure 1 , when the terminal electrode on the catheter (installed at the end of the catheter through the elastic body 5) is attached to the human tissue 14, the terminal electrode is bent relative to the catheter, and the elastic body 5 is deformed. This embodiment involves a pressure detection ablation Catheter, the distal end of the ablation catheter includes an elastic body 5 and a pressure sensor 7, (the elastic body 5 is a circular tube structure), and the elastic body 5 is a tubular structure, which includes a section A and a section B (such as Figure 4 , 5 , where A section is A section A51, which is the part of the elastic body 5 that contains the hollow groove A53, such as Figure 5 , section B is the part below section A A51 that is not provided with the hollow groove A53), the section A A51 is provided with a hollow structure that increases elasti...

Embodiment 2

[0060] like Figure 9 , 10 The structure of the ablation catheter in this embodiment is different from that of Embodiment 1 in that the elastic body 5 is divided into A sections B52 and B sections, and a hollow groove B54 is set on the A section B52 (the width of the hollow groove B54 is 0.05mm-0.40mm, and the hollow groove B54 is hollowed out. The length of the groove area is 1mm-5mm, that is, the length of the A section B52). The hollow structure on the A section B52 forms a number of hollow parts 15 along the edge of the B section. The diameter of the hollow parts 15 is larger than that of the other parts of the hollow structure. ,like Figure 10 , 11 , compared with the slender groove body in the hollow groove B54 that extends smoothly upward in a spiral shape, the hollow part 15 in the hollow groove B54 is a relatively large space, there are three in total, and the elastic bodies 5 are adjacent in the radial direction. 120° arrangement, so that the length of the connec...

Embodiment 3

[0062] like Figure 13 , The structure of the ablation catheter in this embodiment is different from that of Embodiment 1 in that the hollow structure includes a plurality of hollow grooves which are arranged independently of each other and whose hollow parts are continuous, and the hollow grooves are elongated and arranged axially along the elastic body 5 ( A linear hollow slot), which is different from the spirally arranged hollow slot A53 and hollow slot B54, the elastic body 5 is also a round tube structure, and all the hollow slots have the same shape.

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Abstract

The invention relates to the field of ablation catheters, in particular to an ablation catheter having a pressure detecting function. The far end of the ablation catheter comprises an elastomer and a pressure sensor, wherein the elastomer is of a hollow-out tubular structure and comprises a section A and a section B, the section A is provided with a hollow-out structure having increased elasticity and having the end extending to the section B, and the pressure sensor is arranged at the connected area of the section A and the section B. The invention aims to provide an ablation catheter making pressure detection more accurate and a relevant structure including the ablation catheter.

Description

technical field [0001] The invention relates to the field of ablation catheters, in particular to an ablation catheter with a high-precision pressure detection function and related structures including the ablation catheter. Background technique [0002] Cardiac arrhythmia is one of the most common heart diseases in the world. Radiofrequency ablation with catheters has been widely used clinically to treat such diseases. During radiofrequency ablation, radiofrequency energy is transmitted through the catheter to the electrode and the site where the electrode contacts and the surrounding myocardial tissue to ablate. [0003] It has been clinically proven that ablation can achieve better therapeutic effect only when the contact pressure between the electrode at the distal end of the catheter and the myocardial tissue is appropriate. Specifically, during ablation catheter treatment, the catheter is inserted into the heart, and the distal end of the catheter is in contact with t...

Claims

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Application Information

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IPC IPC(8): A61B18/12A61B18/14A61B90/00
CPCA61B18/12A61B18/1492A61B2018/00351A61B2018/00595A61B2018/00773A61B2018/1405A61B2018/1467
Inventor 李楚武邹波朱晓林
Owner 四川锦江电子医疗器械科技股份有限公司
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