Specific in-vivo lumen implant

Abstract

The invention discloses a specific in-vivo lumen implant which comprises a hollow stent body. The stent body is formed by tightly winding an elastic metal wire and / or a polymer wire into a spiral shape and is provided with a cavity axially penetrating through the stent body, and the metal wire and / or the polymer wire are / is formed by doubling and twisting a double-strand wire structure. The inner wall of the cavity of the stent body is subjected to high-temperature friction or thin film coating treatment, so that an integrally smooth and flat inner wall is formed, and one or more pressure relief channels extending from one end of the stent to the other end of the stent are formed in the smooth inner wall in the axial direction of the stent so as todisperse or weaken the pressure of blood flow on the inner wall of the stent when the stent graft prosthesis is implanted into blood vessels. The cross section of the metal wire and / or the polymer wire material is circular, and the outer wall of the stent is subjected to scraping treatment or high-temperature pressing, so that the outer surface of the metal wire and / or the polymer wire material for forming the stent looks like a wrinkle shape as a whole. Therefore, just like an annelidan body surface, the stent is provided with an annelidan body surface bionic outer wall.

Description

technical field [0001] The invention relates to the technical field of implants in vivo, in particular to a specific inner lumen implant. Background technique [0002] In vivo lumen graft prosthesis is a prosthesis used for percutaneous implantation into living blood vessels or other organs with similar lumen structure. These grafts can be biocompatible stents or artificial prostheses. In general, stent-graft prostheses usually include one or more radially compressible stents that can be placed in body vessels in a shape slightly larger than the diameter of the body vessel. Expanded with graft material on the inside or outside of the stent. When the stent-graft prosthesis is radially expanded in situ, the stent anchors the tubular graft material to the wall of the blood vessel or anatomical duct. Thus, the stent-graft prosthesis is typically held in place by mechanical fit and friction due to the reactive force provided by the radially expanded stent against the vessel wal...

AI Technical Summary

Problems solved by technology

However, the expansion of existing stent grafts, whether they are bare metal stents, drug-eluting stents, or biodegradable stents, will cause varying degrees of vascular damage during implantation, and when the stent-graft prosthesis is against Blood cannot flow through the stent-graft when the vessel wall is partially dilated but the proximal end of the stent-graft is captured by the terminal capture mechanism

Therefore, pulsatile blood pressure against the proximal or upstream end of the stent-graft prosthesis can cause the stent-graft prosthesis to move during deployment, presenting challenges in accurately positioning, deploying, and stabilizing the stent-graft prosthesis

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