Blood flow guiding device

Abstract

The invention relates to a blood flow guiding device which comprises a support body which is of a tubular structure and formed by weaving weaving wires, meshes are formed in the support body, every two crossed weaving wires form a crossed part, one of the two weaving wires defining the crossed part is an inner side weaving wire close to the center of the support body, and the other weaving wire is an outer side weaving wire. The cross section of each weaving wire is in a strip shape with the length extending in the axial direction of the support body, the inner side weaving wires gradually incline towards the center of the support body in the blood flow direction in the tumor carrying blood vessel, and an inner side weaving wire guiding face gradually extending towards the center of the support body in the blood flow direction in the tumor carrying blood vessel is arranged on the inner side face of the inner side weaving wire. The invention provides the blood flow guiding device capable of improving the blood guiding effect.

Description

technical field [0001] The invention relates to a medical device in an interventional operation, in particular to a blood flow guiding device for aneurysm treatment. Background technique [0002] The dense mesh stent, also known as the blood flow guiding device, is a new type of interventional embolization device. An aneurysm is a sac-like protrusion formed on the wall of a blood vessel. The blood flow guiding device is to release a stent across the aneurysm in the blood vessel and on the parent artery to reconstruct the blood vessel. Since the mesh of this stent is relatively small, it will interfere and reduce the flow rate from the parent artery. The blood flow entering the aneurysm blocks the blood flow in the aneurysm, leading to the formation of thrombus in the aneurysm, which is manifested as "blood flow guidance". [0003] It works through a hemodynamic mechanism, which is completely different from the previous coil embolization, and promotes complete occlusion of t...

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Problems solved by technology

[0005] Judging from the use of the blood flow guiding device, we know that the metal coverage of the stent body has certain requirements. First, the metal coverage of the stent body should not be too small. Too small metal coverage will lead to more blood flow into the body. In the aneurysm, reduce the guiding effect of the blood flow guiding device; secondly, the metal coverage of the main body of the stent is not easy to be too large, because the thrombus in the aneurysm needs to be formed slowly, if the metal coverage is too large, it may cause acute thrombosis Complications, the braided wire in the prior art adopts a circular structure, which cannot give a higher blood flow guiding effect under the requirement of a certain metal coverage

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