Gradient array ultrasonic imaging guidance ablation catheter

Abstract

The invention discloses a gradient array ultrasonic imaging guidance ablation catheter, which comprises a catheter body, a gradient array ultrasonic imaging energy converter, a circulating saccule, an ultrasonic treatment energy converter and an inner tube, wherein the catheter body has a hollow tubular structure; the inner tube is positioned in the catheter body; and the gradient array ultrasonic imaging energy converter is fixed at the front end of the catheter body and consists of a forward part, a transition part and a lateral part which are integrated with one another. Compared with X-ray guidance, the ablation catheter can reduce radiation hazard on patients and doctors during guidance; moreover, during or after a surgery, the gradient array ultrasonic imaging energy converter can be used for performing ultrasonic image monitoring, so that a doctor can know a targeted area and the anatomical structures of surrounding blood vessels and tissues more institutionally and can monitor anatomical structure information before and after the ablation of an ablation lesion in real time so as to judge a final ablation effect.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to a gradual array ultrasound imaging-guided ablation catheter. Background technique [0002] In recent years, radiofrequency ablation has become more and more popular and respected by many scholars, and has been used in the treatment of brain, lung, breast, liver, kidney, prostate, uterus and bone tumors. The transmission method will generate a large amount of heat generated by radio frequency energy. When the local temperature exceeds 45°C to 50°C, the protein in normal cells will be denatured, the bilayer lipid membrane will be dissolved, and the cell membrane will collapse. At the same time, the water inside and outside the cell will be lost, resulting in tissue coagulation. necrosis, thus being able to effectively kill local tumor cells. [0003] At present, the existing radiofrequency ablation catheters usually need to enter the position of the target cells ...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing radiofrequency ablation catheters usually need to enter the position of the target cells under the guidance of X-rays. Due to the limited anatomical structure information provided by X-rays, the radiofrequency ablation catheters can only be positioned, but the target cells cannot be well positioned. Even though the intraluminal wall structure where the target cells are located can be observed by injecting contrast agents, it cannot provide information on the anatomical structure of the extraluminal muscular layer, adventitia, peripheral tissues of the lumen, target cells, etc. Detailed information such as blood vessel thickness and blood vessel elasticity at the location, so X-rays cannot be used to monitor the anatomical structure information before and after ablation of the ablation lesion in real time to judge the final ablation effect

[0004] In addition, during post-ablation treatment, X-rays cannot effectively identify whether the target vessel is deformed before injection, and cannot effectively monitor the entry of the microneedle into the target area and guide and control the appropriate injection depth of the microneedle. If the vessel wall of the target vessel is thin or calcified Severe, after injection, it will cause postoperative hemorrhage, endangering the life of the patient

[0005] Therefore, the existing radiofrequency ablation catheters cannot meet the clinical needs, and a new type of ablation catheter is urgently needed

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