Special covered stent for aortic arch in-situ fenestration

Abstract

The invention relates to the technical field of medical instruments, and discloses a covered stent special for aortic arch in-situ fenestration, the near end of the aortic covered stent is provided with 2-3 Z-shaped wave stent rings (near-end Z-shaped wave stent ring groups) and a near-end small-wave stent ring, and the far end of the aortic covered stent is provided with 3-4 Z-shaped wave stent rings (far-end Z-shaped wave stent ring groups). A saddle-shaped metal stent ring is arranged on the middle section of the aorta covered stent, the aorta covered stent is covered with a covering film in the whole process, and latticed reinforcing wires are arranged on the covering film. According to the covered stent special for aortic arch in-situ windowing, the covered stent special for in-situ windowing is mainly provided for the in-situ windowing technology, the windowing success rate is increased, and the probability that a branch stent is compressed by the included angle of a metal ring to cause narrowing is reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a special coated stent 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, during the ...

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Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a special coated stent for in-situ fenestration of the aortic arch, which can solve the difficulty of fenestration caused by the head end of the fenestration instrument often being located on the Z-shaped wave metal skeleton when the existing stent is used, and the problem of fenestration. The position of the window is located at the angle of the metal ring, which leads to the limitation of the size of the window, and the pressure of the angle after the release of the branch bracket causes the local narrowing of the branch bracket; the invention mainly provides a method for improving the success rate of window opening and reducing the branch Aortic covered stent-graft with the probability of branch stent stenosis caused by the stent being compressed by the included angle of the metal stent

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