Patent ID: 7445610

Claim:
An assembly for treatment of a vessel bifurcation comprising: a guidewire sheath, guidewire sheath defining at least one guidewire lumen, the at least one guidewire lumen constructed and arranged to be moveably disposed about at least one guidewire; and a catheter, the catheter having a catheter shaft and at least one balloon, the catheter shaft having a proximal end region, a distal end legion and a length, the at least one balloon having a proximal end and a distal end, the at least one balloon positioned adjacent to the distal end legion of the catheter shaft, the catheter shaft defining at least one inflation lumen, a guidewire sheath lumen and a slit region, the at least one inflation lumen extending from the at least one balloon to the proximal end region of the catheter shaft, the at least one inflation lumen being in fluid communication with the at least one balloon wherein the at least one balloon is expandable between an unexpanded configuration and an expanded configuration, the guidewire sheath being moveable through the guidewire sheath lumen, the catheter shaft defining an ostium therethrough proximal to the proximal end of the balloon and in fluid communication with the guidewire sheath lumen, the slit region extending distally from the ostium to the distal end legion of the catheter shaft.