Special covered stent for functional aortic arch in-situ fenestration

Abstract

The invention relates to the technical field of medical instruments, and discloses a functional covered stent special for aortic arch in-situ fenestration, 2-3 Z-shaped wave stent rings (near-end Z-shaped wave stent ring groups) are arranged at the near end of the aortic covered stent, and 3-4 Z-shaped wave stent rings (far-end Z-shaped wave stent ring groups) are arranged at the far end of the aortic covered stent. The middle section of the aorta covered stent is provided with a saddle-shaped metal stent ring, the aorta stent is covered with a covering film in the whole process, the covering film is provided with latticed reinforcing wires, the peripheral side of the covering film of the first Z-shaped wave stent ring of the near-end Z-shaped wave stent ring group is wrapped with a sponge-like structure, and wefts and warps which are matched with each other are arranged inside the latticed reinforcing wires. The covered stent special for in-situ windowing is mainly provided for the in-situ windowing technology, the windowing success rate is increased, the probability that the branch stent is compressed by the included angle of the metal ring to cause narrowing is reduced, damage of the near end of the stent to the aortic wall is reduced, and the risk that a near-end restituted dissection occurs is reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a functional coated stent special for in-situ fenestration of the aortic arch. Background technique [0002] At present, endovascular technology has been applied to the treatment of aortic arch diseases, and the key point is to reconstruct the branch vessels on the arch. The current technologies mainly include pre-fenestration technology, chimney technology, branch stent technology and in situ fenestration technology, each with its own advantages. Disadvantages, due to the existence of the following problems, the current in-situ window opening technology is an ideal method: [0003] The pre-opening technology is an on-stage transformation of the existing commercialized finished stent, that is, trimming the film to form a window. This process will damage the normal structure of the stent, making it difficult to guarantee the stability of the long-term stent. In addition, ...

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Problems solved by technology

[0010] Aiming at the deficiencies of the prior art, the present invention provides a functional special covered stent for in situ fenestration of the aortic arch, which can solve the difficulty of fenestration when the head of the fenestration instrument is often located on the Z-shaped wave metal skeleton when the existing stent is used. And the position of the window opening is located at the angle of the metal ring, which leads to the limitation of the size of the window opening, and the problem of local narrowing of the branch bracket caused by the pressure of the angle after the release of the branch bracket; An aortic covered stent that reduces the probability of stenosis caused by branch stents being compressed by the angle of the metal stent, reduces the damage to the aortic wall at the proximal end of the stent, and reduces the risk of proximal recurrent dissection

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