Coaxial/side-by-side lumen perfusion dilatation catheter

Claim 1

A perfusion dilatation catheter for use with a guide wire, the catheter comprising: a proximal shaft section having a proximal end, a distal end, an outer tube with an outer surface and an inner surface, and an inner tube with an outer surface and inner surface, the inner tube coaxially positioned within the outer tube, a space between the inner surface of the outer tube and the outer surface of the inner tube defining an inflation lumen, the inner surface of the inner tube defining a guide wire lumen, the outer and inner tubes extending from the proximal end to the distal end of the proximal shaft section; a distal shaft section having a length less than the proximal shaft section, and further having a proximal end, a distal end, an outer surface, an inner surface, and a rib across the inner surface to form eccentric, side-by-side first and second lumens which extend from the proximal end to the distal end of the distal shaft section, wherein the first lumen is sealed at the distal end and the second lumen is exposed at the distal end, the distal shaft section connected to the proximal shaft section such that the first lumen of the distal shaft section communicates with the inflation lumen of the proximal shaft section and the second lumen of the distal shaft section communicates with the guide wire lumen of the proximal shaft section, and wherein the distal shaft section includes an opening near the proximal end for allowing blood to enter into and flow through the second lumen; and a balloon connected to the outer surface of the distal shaft section, the balloon having an interior in communication with the first lumen.