STENT RETAINING HYBRID SLEEVE MATERIAL AND STRUCTURE

摘要

A stent delivery system comprising a catheter including a stent mounting region. A stent disposed about the stent mounting region of the catheter, th e stent having a distal end and a proximal end, the stent further having an unexpanded state and an expanded state. At least one stent retaining sleeve having a first end overlying an end of the stent when the stent is in the unexpanded state, a second end engaged to at least a portion of the catheter adjacent to the stent mounting region. The outside surface of the stent retaining sleeve being composed of a first material, at least a portion of t he first end of the inside surface being composed of a second material. The fir st material having a first predetermined hardness, the second material having a second predetermined hardness, the second predetermined hardness having a higher durometer value than the first predetermined hardness.