Curled multi-section developing thrombectomy stent system

Abstract

The invention provides a curled multi-section developing thrombectomy stent system. The curled multi-section developing thrombectomy stent system comprises a stent, a push rod and a guide-in sheath, wherein the stent is curled, and the diameter of the stent can be automatically adjusted according to the diameter of a blood vessel, so the stent can be attached to thrombus and the blood vessel wall more easily, and the blood vessel is prevented from being damaged by the stent; the stent is connected with a stent far-end developing mark and a stent middle developing mark, and the stent middle developing mark is arranged according to a preset axial distance from the stent far-end developing mark; and the stent is fixedly connected with the push rod, and a near-end developing mark is arranged at a fixed joint. According to the invention, a doctor can better judge the unfolding state of the stent and the embedding state of the stent in the thrombus, and the effective length of the stent for capturing the thrombus and the position of the thrombus are effectively marked. The invention further discloses various connection modes of the stent and the push rod, and the connection strength and the conveying performance between the stent and the push rod can be improved.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a retractable multi-segment developing thrombectomy bracket system. Background technique [0002] Cerebral stroke, also known as cerebral apoplexy, is local brain dysfunction caused by acute cerebrovascular disease. The clinical symptoms last for more than 24 hours. age group and above. At present, the incidence of stroke in our country is increasing year by year, and it has become the first cause of death in our country. [0003] At present, the main treatment methods for ischemic stroke are drug thrombolysis and interventional device thrombectomy. Drug thrombolysis within 4 to 5 hours of onset is the first choice for the treatment of acute ischemic stroke. However, due to the short time window, it is extremely difficult to Only a small number of stroke patients are eligible for drug thrombolysis. At the same time, due to factors such as short treatment time window, low rate of...

AI Technical Summary

Problems solved by technology

During the operation, the stent is shrunk in the sheath less than 1mm. Once the stent is released, the diameter instantly expands to 3-8mm. The sudden large change in diameter can easily cause breakage at the position of the development point.

The broken part will directly scratch the blood vessel, causing spasm, and there is a risk of the developing material falling into the human body

[0005] Although there are a variety of thrombectomy stents that run through the entire stent with a developing wire to play the role of visualization, they cannot be provided to the doctor during the operation to determine the effective working length of the stent to capture the thrombus.

There is no clear requirement for the crimping design of the stent, and the adherence of the stent cannot be guaranteed in actual use, which will affect the thrombus capture effect or damage the vessel wall

[0006] In addition, the design of the connection between the stent and the push rod is not clear, which will affect the connection strength and delivery performance of the two stents, thereby affecting the thrombectomy performance of the stent, and affecting the accuracy and efficiency of surgical operations.

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