Ablation device having pressure detection function

Abstract

The invention relates to the field of ablation devices, and particularly relates to an ablation device having a pressure detection function. The ablation device includes a main tube which can be drawn and bent by a drawing steel wire; a tail end electrode for ablation is arranged on a head of the main tube; an infusion tube communicating with the inner part of the tail end electrode is arranged in the main tube and is used for allowing liquid output of an surface of the tail end electrode; the center of the tail of the tail end electrode is connected to an elastic member; the elastic member is arranged on an outer wall of the infusion tube; the outer wall of the infusion tube is connected to the main tube through a pipe; the elastic member includes an intermediate small-diameter section, wherein the diameter of the small-diameter section is less than the diameter of two side sections of the elastic member; the elastic member is configured to deform with the pressure of a tissue acted on the tail end electrode; and a sensor for measuring the pressure according to the deformation of the elastic member is arranged on the elastic member. The ablation device is accurate in pressure measurement, is low in production cost, and is easy to operate.

Description

technical field [0001] The invention relates to the field of ablation equipment, in particular to an ablation device with pressure detection. 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 t...

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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