Patent ID: 7766951

Claim:
A catheter system comprising: a catheter body having a catheter proximal end and a catheter distal end, said catheter proximal end and said catheter distal end defining a longitudinal direction, said catheter proximal end comprising a rigid member; a balloon positioned at said catheter distal end and comprising: a working length portion having a substantially uniform diameter; a proximal narrowed portion proximal to said working length portion having a smaller diameter than said substantially uniform diameter of said working length portion; and a distal narrowed portion distal to said working length portion having a smaller diameter than said substantially uniform diameter of said working length portion; a wire extending from and unslidingly attached to said distal narrowed portion of said balloon, said wire configured for guiding said catheter through a vessel; and a guidewire enclosure having an enclosure proximal end and an enclosure distal end, said guidewire enclosure at least partially attached to said catheter at an attachment point, wherein said attachment point is located proximal to said working length portion of said balloon.