Vascular restraint device

Abstract

The invention discloses a blood vessel constraining device which comprises a hollow cylindrical rigid frame. One radial side of the rigid frame is broken. The device further comprises an elastic body which is fixed between borders of the rigid frame and forms a semi-ring sleeve structure. The blood vessel constraining device can improve the tension stress performance of a vascular wall, angiectasis and angiorrhexis can be prevented, direct contact of instruments and blood vessel endothelium and blood is avoided, the blood and the blood vessel endothelium are protected, extracorporeal circulation is avoided, operation is easy, time is short, trauma is small, treatment effect can be greatly improved, meanwhile, a bare stent placed in a lumen can be combined for treating artery dissection, the inner portion and the outer portion of the vascular wall are clamped tightly, the mechanical strength of the vascular wall is improved, damage on an aorta intima is lowered, forming rate of inner membrane crevasses is lowered, inner leakage is avoided, the function of vessel inner membrane protecting is achieved, thrombus-causing rate can be lowered, the bare stent has no influence on blood supply of an aorta branch vessel, the occurrence rate of paraplegia is lowered, the implanting range is wide, a false lumen is fully closed, and the shortcoming that an existing later-period false lumen is not completely closed continuously is overcome.

Description

technical field [0001] The invention relates to a medical device, in particular to a blood vessel binding device. Background technique [0002] Aneurysm is a very dangerous vascular disease clinically. Once an aneurysm is found, it needs to be treated as soon as possible. The current treatment measures are mainly divided into: 1. Surgical vascular replacement. The curative effect is relatively definite, but most of these patients are elderly, the surgical trauma is large, most patients need extracorporeal circulation, the perioperative mortality rate is high, and complications such as postoperative thrombosis, important vascular branch stenosis, and anastomotic expansion are relatively common. 2. Minimally invasive interventional therapy technology using the principle of intracavitary isolation. It uses a set of delivery system with a small diameter to deliver the compressed stent graft with support to the position of the vascular lesion. After accurate positioning, the It ...

AI Technical Summary

Problems solved by technology

Once the proximal end of the stent-graft is in contact with the blood vessel, the cavity will be subjected to high pressure under the impact of blood flow, so that the blood flow runs through the entire gap, forming an endoleak. After the endoleak occurs, the false lumen is difficult to Complete thrombosis can lead to complications such as false lumen tumor-like expansion and dissection rupture, and ultimately treatment failure; 2. The stent-graft causes a new breach: there are many reasons for this complication, among which the contact area between the stent-graft and the blood flow Large, under the impact of large blood flow, in order to stabilize the stent, the proximal stent needs to have a large tension to compress the aorta to avoid displacement. The role of the membrane in maintaining the stability of the blood coagulation system is crucial. At present, artificial vascular replacement, endoluminal stent graft isolation and other treatments have seriously damaged the local vascular intima, resulting in blood cell destruction and thrombus formation; 3. Thrombosis: covered stent graft The area in contact with the blood flow is large, and it is difficult for the vascular endothelium to cover the stent graft, so there is still a high rate of thrombosis. 4. Paraplegia and other important organ ischemia is caused by the stent graft blocking the blood flow of important vascular branches

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