Patent ID: 8398699

Claim:
A stent system, comprising: a stent a cylindrical stent body formed by weaving at least one strand of a shape memory alloy wire such that mesh is defined by the wire and bent portions are formed along circumferences of opposite ends of the stent body; and a drawstring, comprising: an end string coupled in an end of the stent body in an annular shape in such a way that the end string passes, in a zigzag manner, through mesh arranged in a circumferential direction of the stent body, with a hook loop formed by tying opposite ends of the end string to each other, wherein the end string comprises first end string and a second end string, each of the first and second end strings having a semicircular shape, with the hook loop being formed by tying first ends of the first and second end strings to each other; a longitudinal string extending at a first end thereof from the end string, the longitudinal string being inserted into the stent body through mesh, and extending a predetermined length through an interior of the stent body, and coming out of the stent body through another mesh, wherein the longitudinal string comprises a first longitudinal string and a second longitudinal string which extend at first ends thereof from respective second ends of the first and second end strings; and a circumferential string extending from a second end of the longitudinal string, the circumferential string being formed in an annular shape in such a way that the circumferential string passes, in a zigzag manner, through mesh arranged in the circumferential direction of the stent body, wherein the circumferential string extends between second ends of the first and second longitudinal strings, whereby, when the hook loop is pulled, the end string, the longitudinal string and the circumferential string are consecutively pulled in such a way that the end string is pulled in diametrical and longitudinal directions of the stent body, the longitudinal string is pulled in the longitudinal direction of the stent body, and the circumferential string is pulled in the diametrical direction of the stent body.