ROLLING MEMBRANE WITH HYDRAULIC RECAPTURE MEANS FOR SELF EXPANDING STENT

摘要

A medical device comprising (10) a catheter having a retractable outer sheath (20) and a rolling membrane (36). The catheter includes a catheter inner shaft (24) about which a stent (22) in a reduced diameter configuration may be disposed. A stent retaining region of the sheath is disposed about the stent to retain the stent in the reduced diameter state prior to delivery. The rolling membrane is positioned between the catheter inner shaft and the outer sheath and prior to retraction of the sheath the rolling membrane is disposed about at least a proximal section of the stent and is rollingly retracted therefrom when the sheath is retracted to deliver the stent. The device also recaptures a stent by pressurizing a intra-catheter space, which results in the longitudinal movement of the outer sheath in a distal direction to revocer and retain the stent.