Patent ID: 8721675

Claim:
A balloon catheter for placement between first and second tissue layers of a wall of a blood vessel, the balloon catheter comprising: a catheter shaft including an outer tubular member and an inner tubular member extending through the outer tubular member; and a conically shaped balloon having a proximal balloon neck secured to the outer tubular member and an inverted distal balloon neck secured to the inner tubular member; the conically shaped balloon has a proximal portion tapering radially outward in a distal direction from the proximal balloon neck, and the conically shaped balloon has a distal portion tapering radially outward in a proximal direction from the distal balloon neck, the proximal portion and the distal portion converging at an outermost radial extent of the conically shaped balloon; wherein in an inflated state the conically shaped balloon has an overall length measured from the proximal balloon neck to the distal balloon neck and a outermost diameter measured at the outermost radial extent, the overall length being less than the outermost diameter.