A medical device comprising a catheter having a retractable outer sheath
and a rolling membrane. The catheter includes a catheter inner shaft
about which a stent 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 engaged to a portion of the outer sheath at an
engagement region. 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 recover and retain
the stent.