Micro-porous mesh stent with hydrid structure

摘要

A micro-porous mesh structure for supporting a wall of a body passage includes a general tubular body having a contracted condition for facilitating delivery into the body passage and an enlarged condition for engaging the wall of the body passage, the tubular body is biased towards the enlarged condition. The tubular body further comprises a plurality of openings which define a micro-porous mesh pattern therein.

<Paragraphs id="pa02" num="0002" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">The maximum dimension of the plurality of openings is preferably not more than about 400 micrometers. The micro-porous mesh is preferably made of a shape memory alloy which preferably has a transition temperature between substantially ambient temperatures and body temperatures, the tubular body being biased to the enlarged condition when it is exposed to body temperature. The micro-porous mesh structure preferably further comprises a support element. The support element may slidably engage the tubular element in the enlarged condition, be attached to the tubular element during deployment or be permanently attached to the interior surface of the tubular element. Preferably, the support element has a wall thickness of not more than 150 micrometers. The support element may also be made of a shape memory alloy, which preferably has transition temperature between ambient temperatures and body temperature.