Vascular stent prosthesis for preventing peripheral leakage from creased skirt edge, processing method and skirt edge creasing method

Abstract

The invention discloses a vascular stent prosthesis for preventing peripheral leakage from a creased skirt edge, a processing method and a skirt edge creasing method. The vascular stent prosthesis comprises a stent and a flexible skirt edge, wherein the skirt edge has a spreading state and a stacking state; in the spreading state, the skirt edge axially extends and encircles the periphery of the stent before release; in the stacking state, the skirt edge is driven under the deformation effect during release of the stent and folded and stacked in the axial direction of the released stent to form an annular circumferential leakage blocking part; the vascular stent prosthesis is also provided with a traction rope which only penetrates through the skirt edge, and the traction rope is linked with the radial deformation when the stent is released so as to drive the skirt edge to switch into the stacking state. According to the vascular stent prosthesis, a peripheral leakage prevention technology is adopted for ensuring that the interventional stent is better matched with the inner wall of a blood vessel, the stent is unlikely to move and more stable, the range of the suitable crowds is enlarged, the additional risk of an operation is reduced, and complications such as peripheral leakage, thrombus and the like are prevented. Better hemodynamic performance is provided, the climbing function of host endothelial cells is improved, the occurrence probability of endocarditis is decreased, and the normal blood supply function of the heart and blood vessels recovers.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an artificial blood vessel stent prosthesis for blood vessels and a processing method thereof. Background technique [0002] In the heart, when artificial stents are implanted in other blood vessels or body cavities, there is generally a problem of peripheral leakage. [0003] Peripheral leakage is often accompanied by the following hazards: (1) Peripheral leakage leads to severe hemolysis, anemia, and progressive aggravation of hemoglobinuria; (2) Larger peripheral leakage causes abnormal changes in hemodynamics and decreases cardiac function Even heart failure occurred, and the symptoms and signs did not improve significantly after conservative medical treatment; (3) the weekly leakage was small, but it was complicated with infective endocarditis; (4) the peripheral leakage was complicated with the failure of the bioprosthesis. [0004] At present, there have been some...

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Problems solved by technology

[0009] However, the flexible film is located on one side of the stent axis before it is released, which will inevitably cause the product to be too long as a whole, which puts higher requirements on the conveying system. More importantly, in order to realize the rolling or folding of the flexible film, an additional traction mechanism must be provided. It is controlled by the operator, which increases the complexity and difficulty of the control. There are also metal parts that use the predetermined shape characteristics of the metal parts to drive the flexible membrane to roll up or fold after being released in the body, but the metal parts will undoubtedly make the stent itself more complicated. , and bring additional risks. In addition, due to the influence of the peripheral space of the stent, it is also difficult to lift the flexible membrane to the ideal position, so the effect is not ideal

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