Covered stent

Abstract

A covered stent (), comprising a main body stent (), a window () being formed on a surface of the main body stent (). The covered stent () further includes an internal covering film (). An edge of the internal covering film () is connected to the main body stent (). The internal covering film () includes a bottom portion (), a proximal end folding portion and a distal end folding portion, and the proximal and distal end folding portions are disposed at two ends of the bottom portion (), respectively. At least one of the proximal end folding portion and the distal end folding portion is disposed on an inner surface of the main body stent (), and is recessed toward an inner cavity of the main body stent () to form a receiving cavity, and a through hole () that communicates with the inner cavity of the main body stent () is also formed on the internal covering film (). The internal covering film () of the covered stent () is provided with folding portions (), and the folding portions () have a receiving cavity. When an implantation path of a bridging stent () is established, a guide wire or catheter can extend into a branch stent () along the receiving cavity, to thereby quickly establish the implantation path of the bridging stent () and shorten the operation time.