Patent ID: 8597240

Claim:
A catheter shaft for a balloon dilation catheter to be utilized with a guidewire, the shaft having a proximal end and a distal end, the shaft comprising: an outer tubular member having a bore, a proximal end and a distal end; a guidewire tubular member coaxially disposed within the bore of the outer tubular member along the length of the outer tubular member wherein an inner surface of the outer tubular member and an outer surface of the guidewire tubular member define an annular inflation/deflation lumen extending between the proximal end of the shaft and the distal end of the outer tubular member; and a plurality of legs extending from the guidewire tubular member, at least one of the legs extending radially beyond the inside diameter of the outer tubular member such that the leg blocks movement of the guidewire tubular member into the outer tubular member when the leg of the guidewire tubular member abuts the distal end of the outer tubular member.