Fully crimped stent for treating bifurcations

A stent delivery system for treating a bifurcated vessel, the system comprising:

• a first elongate shaft having a proximal end, a distal end, and a first expandable member coupled to the distal end of the first elongate shaft;
• a first stent having a proximal end and a distal end, and a sidewall with a side hole disposed therethrough, the side hole disposed between the proximal end and the distal end of the first stent, the first stent disposed over the first expandable member;
• and
• a second elongate shaft having a proximal end, a distal end, and a second expandable member coupled to the distal end of the second elongate shaft,
• wherein the second elongate shaft is slidably disposed under the proximal end of the first stent and extends out of the side hole,
• wherein the first stent is fully crimped over a proximal portion and a distal portion of the first expandable member and a proximal portion of the second expandable member so as to prevent axial movement of the first stent along the first elongate shaft or the second elongate shaft during delivery,
• wherein a distal portion of the first expandable member is pillowed to form an enlarged distal dumbbell having a diameter greater than a diameter of a distal-most edge of the first stent, the enlarged distal dumbbell providing a protective barrier that protects the distal-most edge of the first stent,
• wherein a proximal portion of the first expandable member is pillowed to form an enlarged proximal dumbbell having a diameter greater than a diameter of a proximal-most edge of the first stent, the enlarged proximal dumbbell providing a protective barrier that protects the proximal-most edge of the first stent, and
• wherein a proximal portion of the second expandable member is pillowed to provide a protective barrier that protects a proximal edge of the first stent,
• wherein the second elongate shaft is axially slidable under the first stent and through the side hole disposed between the proximal end and the distal end of the first stent during a relative axial movement between the first and second elongate shafts,
• wherein an intermediate portion of the second expandable member is disposed between the proximal and distal ends thereof, and the intermediate portion is pillowed to form a circumferential raised barrier adjacent to an edge of the side hole,
• and
• wherein the raised barrier provides protection preventing the edge of the side hole from catching on surrounding tissue or an edge of an introducer sheath during delivery.