Covered Stent and Covered Stent System for Implantation at Vascular

A covered stent system for implantation at vascular branches, comprising a delivery system and a covered stent provided in the delivery system, a membrane breaker, a dilatation balloon and branch stents, and the covered stent comprises a stent body and a membrane fixedly connected to the stent body, micropore areas are provided on the membrane, and the micropore areas have a plurality of micropores which are arranged into an array with pore spacing ranging from 0.2 mm to 2.0 mm, and the micropores are capable of allowing blood flow to pass through, and when the covered stent is delivered to the target area by the delivery system and released, the blood flow through the micropores directs the micropore areas to be placed at the opening of the vascular branch, so the micropore areas can temporarily supply blood to the vascular branch, and the membrane breaker is used to penetrate the micropore areas to provide an opening for the dilation balloon to pass through, and the dilation balloon is used to further increase the size of the opening to facilitate the support of the branch stents through the micropore areas at the vascular branches to establish the blood supply channels of the vascular branches.