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Radio frequency ablation catheter and radio frequency ablation system

A radiofrequency ablation and catheter technology, which is applied in the field of medical devices, can solve the problems of inability to closely fit the ablated tissue, poor ability of ablation electrodes to pass lesions, and large size of ablation electrodes, so as to meet the needs of clinical use and improve the ability to pass lesions. , the effect of improving the success rate of ablation

Pending Publication Date: 2019-06-25
SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a radio frequency ablation catheter to solve the problem of using metal electrodes as ablation electrodes of radio frequency ablation catheters. Due to the characteristics of high hardness and poor flexibility of metal electrodes, the ablation electrodes occupy a large size and cannot be closely connected with the ablated tissue. Fitting, resulting in poor ability of ablation electrodes to pass through lesions and low success rate of ablation

Method used

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  • Radio frequency ablation catheter and radio frequency ablation system
  • Radio frequency ablation catheter and radio frequency ablation system
  • Radio frequency ablation catheter and radio frequency ablation system

Examples

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Embodiment 1

[0033] In this embodiment, the radiofrequency ablation catheter includes a lumen body and a flexible electrode, the flexible electrode is disposed on the wall of the lumen body, and the lumen body is a catheter body or a balloon disposed outside the catheter body.

[0034] Please refer to figure 1 , which is a schematic diagram of the structure of the radiofrequency ablation catheter in an embodiment of the present invention, such as figure 1 As shown, the radiofrequency ablation catheter includes: a balloon 1, a catheter body 2 and a flexible electrode 3, the balloon 1 is arranged on the outside of the catheter body 2, and the flexible electrode 3 is arranged on the outside of the balloon 1 Therefore, the flexible electrode 3 can be folded or expanded to a certain shape and position along with the balloon 1, so as to ablate the biological tissue at the corresponding position.

[0035] The core idea of ​​the radiofrequency ablation catheter of the present invention is to use ...

example 11

[0044] In this embodiment, the balloon 1 is an ordinary flat structure, and the material of the balloon 1 is a nylon / Pebax (block polyether amide resin) blend material, and the length of the flat section of the balloon 1 after expansion is 40.0 mm. , with a diameter of 4.0mm. The graphene electrode is a sheet-like structure with a square cross section, wherein the graphene electrode has a side length of 1 mm and a thickness of 30 μm. The cable joint 6 is connected to the graphene electrode through the third interface 53 of the connector 5 through at least one electrode lead 4, and the electrode lead 4 is made of one or more materials in stainless steel, platinum, iridium, carbon fiber or conductive polymer One end of the electrode wire 4 is fixedly connected to the edge of the graphene electrode by brazing, and then the graphene electrode and the electrode wire 4 are bonded and fixed in the middle of the outer surface of the straight section of the balloon 1 by conductive glue...

Embodiment 2

[0046] Please refer to image 3 The difference between the second embodiment and the first embodiment lies in the position of the temperature measuring component 7 relative to the positive and negative electrodes 32 in the flexible electrode 3 . The temperature measurement component 7 in the first embodiment is set at the specific position near the flexible electrode 3 refers to: the measurement component is set between the positive electrode 31 and the negative electrode 32; The specific location where the temperature measuring component 7 is disposed near the flexible electrode 3 refers to: the temperature measuring component 7 is disposed on one side of the positive electrode 31 and / or the negative electrode 32 . In other words, the location where the temperature measurement component 7 is set includes not limited to between the positive electrode 31 and the negative electrode 32, as long as it is near the flexible electrode 3, it can sense that the flexible electrode 3 is ...

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Abstract

The invention provides a radio frequency ablation catheter and a radio frequency ablation system. The radio frequency ablation catheter comprises a tube cavity and a flexible electrode; the flexible electrode is arranged on the wall surface of the tube cavity. The flexible electrode is used for replacing a conventional metal electrode to be used as an ablation electrode of the radio frequency ablation catheter, and based on the characteristics of the flexible electrode, such as soft material and strong flexibility, the flexible electrode can closely adhere to an ablated tissue, the problem using a metal electrode as an ablation electrode is solved, the ability of over-lesion and the success rate of ablation are effectively improved, and the clinical use needs of radio frequency ablation are met.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a radiofrequency ablation catheter and a radiofrequency ablation system. Background technique [0002] Radio frequency is a high-frequency vibration with a frequency of 150,000 times per second. Under the action of high-frequency alternating current of radio frequency, a large number of dielectrics in the human body gradually change the ion edge between the positive and negative electrodes from a moving state to a vibrating state. Due to the different sizes, masses, charges and moving speeds of various ions, the ions rub against each other and collide with other particles to generate heat. Radiofrequency ablation is an interventional technique that sends a radiofrequency ablation catheter into a specific site through a blood vessel, and causes local nerve and tissue coagulation necrosis at a specific site by releasing radiofrequency current, so as to block the conduction ...

Claims

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Application Information

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IPC IPC(8): A61B18/12A61B18/14
Inventor 季晓飞姚映忠岳斌
Owner SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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