COVERED STENT AND METHOD OF PRODUCING COVERED STENT

摘要

A covered stent friendly to living body tissue, in which a cover member presses itself against a stent body without the use of an adhesive agent and does not peel off from it, that causes a body lumen wall less irritations, that follows curves of the body lumen, and, even after indwelled in the body, that stably exhibits its function at the indwelled position, and a method of producing the covered stent. The covered stent (10) has a tubular stent (20) and a cover member (30) provided over the outer periphery of the stent and is used as indwelled in a body lumen. The covered stent satisfies the relationships of Rfc/Rfs = 1.5 and Afc/Afs = 2.0, with Rfs being the radial rigidity of the stent (20), Afs being the bending rigidity in the longitudinal axis direction of the stent (20), Rfc being the radial rigidity of the covered stent (10), and Afc being the bending rigidity in the longitudinal axis direction of the covered stent (10). Also, to use the cover member (30), it is extended in length by 1.2 to 3.0 times the original length with the stent (20) expanded in diameter, where the extension is along the circumferential direction of the stent (20).