Multi-disc thrombus out-taking device and conveying device and conveying method thereof

Abstract

The invention provides a multi-disc thrombus out-taking device. The multi-disc throumbus out-taking device comprises a NiTi mesh body and a conical cap, and the top end of the NiTi mesh body is connected with the conical cap; the NiTi mesh body comprises at least three discs, the adjacent discs are connected through waist parts, and the top of the disc at the most front end is connected with the conical cap; each waist part is internally provided with a spring ring for connecting the conical cap and a conveying device. The invention further provides a conveying device and conveying method of the multi-disc thrombus out-taking device. The conveying device comprises an outer sheath tube, an inner sheath tube and a push rod, wherein the inner sheath tube is used for controlling the release and constriction of the NiTi mesh body of the multi-disc thrombus out-taking device, the push rod is used for being connected with the tail end of the disc at the end of the multi-disc thrombus out-taking device, the inner sheath tube is coaxially arranged on the outer side of the push rod, and the outer sheath tube is coaxially arranged on the outer side of the inner sheath tube. Through the adoption of the multi-disc thrombus out-taking device, shedding of thrombus plaque can be avoided, thrombi are thoroughly taken out without residues, the damage to vascular walls is greatly reduced, and the device has good safety and reliability.

Description

technical field [0001] The invention relates to a temporary three-type interventional medical device, and more specifically, relates to a capturing thrombus retriever with a multi-disk structure. Background technique [0002] A blood clot can form an embolism in a patient's vasculature. Sometimes these plugs are dissolved in the blood safely and harmlessly. However, at other times, these clots may lodge in the blood vessel, partially or completely blocking the vessel, preventing the flow of blood. If the embolism site occurs in a sensitive tissue, such as the brain, lung or coronary artery of the heart, it may cause serious tissue damage, such as stroke, pulmonary embolism, myocardial infarction, etc. [0003] Intravascular thrombosis is a common and frequently-occurring disease clinically, and vascular recanalization is the key to the treatment of acute ischemic stroke, pulmonary embolism, and myocardial infarction. At present, there are two main treatment methods for in...

AI Technical Summary

Problems solved by technology

Thrombectomy has the best effect when removing large thrombi, but it is easy to cause plaque on the vessel wall and broken thrombus to fall off and flow to the distal vessel to cause new embolism. Once the important branch vessel is blocked, it will cause serious injury. Medical malpractice, and there are often incomplete thrombectomy and residual problems during thrombectomy, which can easily lead to the formation of secondary acute thrombus

Suction thrombus extraction works better when removing small embolisms. To prevent blockage of the suction tube when removing large thrombi, it is necessary to repeatedly crush the thrombus before suctioning. The process is cumbersome and can easily damage blood vessels.

Thrombectomy by rotary cutting causes greater damage to the vessel wall and can easily cause complications

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