Furcated intravascular stent

Abstract

The invention discloses a furcated intravascular stent which comprises a main body stent section provided with tectorial membrane and a branch stent section connected with the main body stent section, and the connection position of the main body stent section and the branch stent section is provided with a leading-in section with a horn shape. The upper part of the leading-in section is narrow and the lower part is wide, and the design enlarges the diameter of the leading-in section, can obviously improve the leading-in performance of the branch stent and makes the leading-in process be simple and smooth. In addition, one end of the branch stent is designed as a crown shape, a short branch section of the main body stent section has a taper so as to be beneficial for enhancing the adherent performance of the proximal end of the branch stent, the pull-out force between the branch stent and the short branch section is improved, and the use risk of the stent is reduced.

Description

technical field [0001] The invention relates to a minimally invasive interventional medical device product, in particular to a bifurcated vascular stent. Background technique [0002] With the development of modern medicine, artificial vascular stent, as a new type of interventional vascular treatment technology, is being continuously applied to the treatment of diseases such as aortic stenosis, valve abnormality, aortic dissection and aneurysm. Among them, vascular stents with coverings (referred to as covered stents) are very common in the treatment of aneurysms. [0003] In recent years, interventional vascular therapy technology has been applied to the treatment of aortic dissection, and has achieved gratifying results. In 1994, foreign countries first used stent-graft closure to treat type B aortic dissection. After operation, it was found that almost all patients had false Thromboembolism and occlusion occurred in all the cavities, and the real treatment was realized....

AI Technical Summary

Problems solved by technology

For the one-piece artificial vascular stent, there is generally no risk, but for the split vascular stent, since the main stent is often released first during the release process of the stent, and then introduced into the branch stent system, if the introduction is difficult, it may greater risk of surgical failure

[0007] The end of the existing bifurcated stent-graft stent where the main body stent-graft section matches the branch stent-graft often has no introduction section. The disadvantage of this design is that after the main body stent-graft is released in the blood vessel, a guide is required. The wire enters the short branch stent of the main covered stent segment, and then the branch stent delivery system enters the short branch along the guide wire. If there is no introduction segment, the introduction of the guide wire will become more difficult, which will increase the operation time and even cause the operation to fail.

[0008] Furthermore, the short branch stents of the main body stent-graft section of the existing bifurcated vascular stent usually do not have a taper, so that when the main body stent-graft and the branch stent-graft cooperate, a "wedge" cannot be formed. The pull-off force will be relatively low, so that the branch bracket may even be separated from the main bracket due to the low pull-off force with the main bracket, causing serious consequences

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