an ablation catheter

Abstract

The invention relates to the ablation field, and particularly relates to an ablation catheter. The ablation catheter includes a flexible tube; electrodes for ablating tissues are arranged on the tube; an infusion tube is arranged in the tube; the infusion tube communicates with an outer wall of the tube and can infuse liquid from the outer wall of the tube; the ablation catheter further includes a flexible part and a sensor; a tail end of the tube is a single section which is connected to a main body of the tube through the flexible part; the flexible part is configured to deform with the force of a tissue acted on the tail end of the tube; the sensor is arranged between the tail end of the tube and the flexible part; and the sensor can generate corresponding signals according the deformation. The ablation catheter is simple in structure, is low in production cost, is direct and accurate in pressure measurement, and is good in ablation effect.

Description

technical field [0001] The invention relates to the field of ablation, in particular to an ablation catheter. Background technique [0002] Cardiac arrhythmia is one of the most common arrhythmia diseases in the world. Clinical application of catheter radiofrequency ablation has been widely used in the treatment of this type of disease. Radiofrequency energy is transmitted through the catheter to the electrode and the site where the electrode contacts and the surrounding myocardial tissue for ablation. 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. [0003] During ablation catheter therapy, the catheter is inserted into the heart and the distal end of the catheter is in contact with the inner wall of the heart. During this process, it is usually important to make the distal end of the catheter in good contact with...

AI Technical Summary

Problems solved by technology

[0003] During ablation catheter therapy, the catheter is inserted into the heart and the distal end of the catheter is in contact with the inner wall of the heart. During this process, it is usually important to make the distal end of the catheter in good contact with the inner wall of the heart. Otherwise, excessive pressure may cause damage to the heart. Undesirable damage to heart tissue, or even perforation of the heart wall, and too little pressure cannot achieve the therapeutic purpose of complete ablation

[0004] The existing technology uses electromagnetic or optical technology to measure the contact pressure between the distal end and the tissue, which requires high and complex equipment, and the manufacturing cost is relatively high.

[0005] As mentioned in the Chinese patent CN103908337AZ, a sensor using magnetic induction is added to the catheter to sense the contact force between the distal end of the catheter and the organ. This sensor is easily distorted by the interference of an external magnetic field in application, and this technology requires It is difficult to install multiple magnetic sensors in the extremely small space at the end, which increases the manufacturing cost

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