Auxiliary embolization device for aneurysm neck

Abstract

The invention relates to a plug device for assisting an aneurysmal neck. The plug device comprises a microcatheter, a fixing guide wire, a developing guide wire, a plug device body and aids, wherein the developing guide wire is fixed on the aid at the far end of the plug device body; the fixing guide wire passes through insides of the aids and the microcatheter; two ends of the plug device body are funnel-shaped when the plug device body is in an unfolded state, and a conical angle ranges from 20-70 degrees; the plug device body adopts a meshed spatial solid structure woven by 8-20 memory metal wires, and ballooning-outs are formed by bulging of deformation of the metal wires at the middle parts of the plug device; the angle of the ballooning-outs is 110-160 degrees. The plug device for assisting the aneurysmal neck has the following advantages: the therapeutic safety is improved, and trauma is small; the plug device can be supported in a parent artery to assist a spring coil for plugging when the aneurysm is difficult to plug only by the spring coil, and the plug device can be recovered completely to be in vitro after plugging; the defect of ischemic complications caused by long-time blockage of blood flow in the parent artery is overcome when the plug device is compared with a balloon-assisted plug.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an embolization device for assisting an aneurysm neck. Background technique [0002] The walls of the vasculature, especially arteries, can develop pathological dilations called aneurysms. Aneurysms are commonly observed as ballooning-outs of arterial walls. This is the result of disease, injury, or a congenital abnormality that has weakened the walls of blood vessels. Aneurysms have thin, flimsy walls and a tendency to rupture, usually caused by or worsened by high blood pressure. Aneurysms can be found in different parts of the body; the most common are abdominal aortic aneurysms (AAA) and brain aneurysms. [0003] Studies have shown that endovascular therapy is a safe and effective treatment for cerebral aneurysms, and most aneurysms can be effectively treated by interventional embolization. In recent years, with the rapid development of material science and interv...

AI Technical Summary

Problems solved by technology

However, it is still a difficult problem to treat complex arteries such as wide neck, fusiform, dissection, giant, tiny and multiple aneurysms

The craniotomy is difficult, and in the process of simply using coil embolization, the coil may protrude into the parent artery and cause occlusion of the parent artery or its branch vessels, resulting in neurological deficits and even life-threatening

[0004] At present, the treatment of wide-necked intracranial aneurysms mainly includes balloon-assisted embolization therapy and stent-assisted coil embolization therapy. In the tumor cavity, however, the balloon blocks the blood flow of the parent artery for a long time to cause ischemic complications, and the expansion of the balloon at the neck of the tumor causes damage to the arterial intima, and there is a risk of thrombosis

[0005] Stent-assisted coils for embolization therapy mainly include Neuroform stents from Boston Scientific, LEO stents from Blat, Enterprise stents from Johnson & Johnson, and solitaireAB stents from Ev3. Avoid the occurrence of in-stent restenosis, which not only increases the economic burden on patients, but also causes bleeding and other side effects caused by long-term oral anticoagulants. Moreover, the flexibility of the stent is poor, and the diameter of the stent cannot be adjusted, making it difficult to withdraw

[0006] To sum up, there is an urgent need for an embolization device that does not require anticoagulants, has good flexibility, is adjustable in diameter, is easy to retrieve, and can pack the aneurysm neck densely to ensure the unobstructed parent artery. Embolization device has not been reported yet

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