Importance

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Abstract

One embodiment of a stent includes a cylindrical openwork frame having holes defined by side frame segments and middle frame segments, and notches defined by the side frame segments. This stent is made of a super elastic metal as a single piece without an abrupt change in the physical property of the stent. Another embodiment of the stent is made of wires in the shape of a substantially circular cylinder. The wires forming the stent are made thicker in the middle portion and thinner in both end portions. A stenosis-treating device includes an indwelling stent, a tubular sheath which holds the stent in a compressed state, a balloon catheter which is passed through the sheath and which has a dilatation balloon, and a projection at the rear of the portion of the sheath in which the stent is held which comes into contact with the rear end of the stent when the sheath is moved rearward and lets the stent out of the front end of the sheath.

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First Claim