Method of manufacturing covered stent and covered stent manufactured thereby

A covered stent comprising:

• a cylindrical body and expansion portions comprising a wire structure having wires forming a hollow pipe structure, wherein the expansion portions are disposed at opposite ends of the cylindrical body and have a diameter greater than the cylindrical body, and wherein the wire structure continuously extends across the cylindrical body and the expansion portions;
• a first PTFE (polytetrafluoroethylene) tape;
• a silicone coating layer occupying spaces between the wires of the expansion portions;
• a second PTFE (polytetrafluoroethylene) tape wound on the first PTFE tape and extending over the wires and the silicone coating layer of the expansion portions, wherein the first and second PTFE tapes are bonded to each other, thereby the first and second PTFE tapes comprise a first film on the cylindrical body of the covered stent and extending completely between the expanded portions;
• and
• first and second respective connecting strands sewn circumferentially along first and second circumferences of the expansion portions at opposing axial ends of the covered stent, the first and second respective connecting strands joining together, at the opposing axial ends of the covered stent, the wires to the second PTFE tape and the silicone coating layer,
• wherein
• the second PTFE tape and the silicone coating layer comprise a second film on the expansion portions of the covered stent, and
• at least one outermost wire of the wires of the covered stent is disposed outwardly from at least one of the first and second connecting strands.