Patent ID: 8348890

Claim:
A balloon catheter for delivering a therapeutic and/or diagnostic agent to tissue, comprising: an outer balloon having a wall with at least one opening therethrough and an inner surface; an inner balloon at least partially disposed in said outer balloon, said inner balloon at least partially enclosing an inflation chamber and having an outer surface defining a space between the outer surface of said inner balloon and the inner surface of said outer balloon; a catheter having a first lumen in fluid communication with the space between the outer surface of said inner balloon and the inner surface of said outer balloon for supplying a therapeutic and/or diagnostic agent thereto; and a second lumen through which fluid is supplied to the inflation chamber of said inner balloon for inflating said inner balloon to urge the therapeutic and/or diagnostic agent out of the at least one opening in the wall of said outer balloon and into tissue; wherein at least one of said outer balloon and said inner balloon comprise at least one protrusion for directing the therapeutic and/or diagnostic agent; and wherein the outer surface of said inner balloon comprises a first protrusion and a second protrusion, the first and second protrusions extending longitudinally and forming a channel therebetween, wherein an outer surface of said outer balloon comprises a third protrusion having an annular shape, and wherein the at least one opening in the wall of said outer balloon is enclosed by the third annular protrusion.