Medical catheter

A catheter and tube body technology, applied in the field of medical catheters, can solve the problems of shallow ablation focus, inability to effectively isolate electrical signals or nerve conduction, and increase the risk of safety, and achieve the effect of improving insulation

Pending Publication Date: 2021-12-31
SHANGHAI MICROPORT EP MEDTECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the contact force is small, the ablation lesion is shallow and cannot effectively isolate abnormal electrical signals or nerve conduction, and when the contact force is large, it increases the risk of safety
In order to avoid this effect, a pressure sensor can be installed to sense the contact force between the distal end of the catheter and the tissue. However, when measuring the force value through the pressure sensor, it is found that the presence of an ablation current will interfere with the current signal of the pressure sensor, while The problem that the accuracy of the measured force value is not high

Method used

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Embodiment Construction

[0040] The medical catheter provided by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structure. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

[0041] As used in the present invention, the term "proximal" is usually the end close to the operator, the term "distal" is usually the end close to the patient near the lesion, "one end" and "the other end" and "proximal" and "Remote" generally refers to the corresponding two parts, and it in...

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Abstract

The invention provides a medical catheter. The medical catheter comprises a catheter body, a pressure sensor, a head electrode, a supporting seat used for supporting the head electrode and a first insulator, wherein the catheter body is an elastic body, and the pressure sensor is used for sensing the deformation quantity of the catheter body; the catheter body comprises a first connecting part which is arranged at the far end of the catheter body, the supporting seat comprises a second connecting part, and the second connecting part is connected with the first connecting part so as to fix the head electrode at the far end of the catheter body; and the first insulator is arranged between the first connecting part and the second connecting part. Due to the fact that the first insulator is additionally arranged between the supporting seat and the catheter body, electric conduction caused by contact between the supporting seat and the catheter body can be avoided, the insulating performance between the head electrode and the pressure sensor is improved, and the problem that when an electrophysiologic catheter conducts force value measurement through the pressure sensor, the precision of a measured force value is not high is solved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a medical catheter. Background technique [0002] In recent years, the catheter system can be used for interventional therapy such as arrhythmia and refractory hypertension. For example, in the treatment of atrial fibrillation in arrhythmia, the ablation or mapping catheter enters the heart through the vein or artery, and the heart is mapped to find abnormal electrical signal positions or pathways, and then energy is applied for ablation, thereby improving The tissue is heated by resistance to generate a non-conductive ablation lesion in the tissue to achieve the therapeutic effect. Another example is renal artery ablation for the treatment of refractory hypertension. The ablation catheter enters the connecting artery between the abdominal aorta and the kidney from the artery, ablation blocks the parasympathetic nerve pathway, and plays a role in lowering blood pressure....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/12A61B18/14
CPCA61B18/12A61B18/14A61B18/1492A61B2018/00577A61B2018/00898
Inventor 周子燕沈磊查飞翔王慧梁波
Owner SHANGHAI MICROPORT EP MEDTECH CO LTD
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