Patent ID: 8617231

Claim:
A catheter system for positioning a stent at a vessel bifurcation, the catheter system comprising: a catheter including a proximal end and a distal end, the catheter comprising: a first tubular member including a proximal end and a distal end, the first tubular member defining an inflation lumen of the catheter and extending distally from the proximal end of the catheter; a second tubular member defining a main guidewire lumen, wherein the distal end of the second tubular member is a distal end of the catheter and the proximal end of the second tubular member defines a main guidewire exit port, wherein the main guidewire lumen is configured to receive a main vessel guidewire therethrough, wherein the second tubular member is at least partially disposed within the inflation lumen of the first tubular member; a balloon including a proximal waist coupled directly to the first tubular member adjacent to the distal end of the first tubular member and a distal waist coupled directly to the second tubular member adjacent to the distal end of the second tubular member; a branch guidewire enclosure positioned alongside the first tubular member, wherein the branch guidewire enclosure defines a lumen configured to receive a branch vessel guidewire therethrough, the branch guidewire enclosure including a proximal end region having a proximal end, a distal end region, and an intermediate region disposed between the proximal end region and the distal end region, the proximal end of the branch guidewire enclosure defining a branch guidewire exit port; and a stent having a lumen and a side opening in a wall thereof, the stent positioned about at least a portion of the balloon, and wherein a distal portion of the branch guidewire enclosure is positioned through the lumen of the stent and exits at the side opening; wherein the branch guidewire enclosure is bonded only to the first tubular member and only bonded to the first tubular member at a bond at the proximal end region of the branch guidewire enclosure, wherein the intermediate region of the branch guidewire enclosure is 10 cm to 100 cm in length between the bond and the proximal end of the balloon, wherein the main guidewire exit port and the branch guidewire exit port are located proximal of the stent and distal of the proximal end of the catheter.