Weeping balloon with flow channels for reduced infusion pressure

A multiple balloon intraluminal fluid delivery catheter for delivering a fluid into a body vessel comprising:

• a catheter shaft extending along a longitudinal axis from a proximal end to a distal end, the catheter shaft including an inflation lumen to deliver an inflation fluid and a fluid delivery lumen to deliver said fluid;
• an inner balloon when in an inflated configuration having a middle portion that spans between a proximal end portion that tapers from the middle portion to a proximal balloon neck and a distal end portion that tapers from the middle portion to a distal balloon neck, the inner balloon having an exterior surface with a plurality of ridges thereon that together span longitudinally from the proximal end portion to the distal end portion, each of the plurality of ridges including a ridge section on the proximal end portion of the inner balloon, a ridge section on the middle portion of the inner balloon, and a ridge section on the distal end portion of the inner balloon, each of the plurality of ridges having a height that is constant along the middle portion of the inner balloon, the inner balloon mounted on the distal end of the catheter shaft and in communication with the inflation lumen, the inner balloon being movable between a deflated configuration and the inflated configuration;
• an outer balloon mounted around the inner balloon, the outer balloon having a middle portion that spans between a proximal end and a distal end, the outer balloon being movable between a compressed configuration and an expanded configuration, the outer balloon including a plurality of holes;
• and
• the inner balloon and the outer balloon being configured and oriented such that a plurality of flow channels are defined when the inner balloon is in the inflated configuration and the outer balloon is in the expanded configuration and a portion of each of the plurality of ridges that spans along the middle portion engage an inner surface of the outer balloon, the inflated configuration of the inner balloon and the expanded configuration of the outer balloon defines an annular lumen there between, the annular lumen and the plurality of flow channels being in communication with the fluid delivery lumen and the plurality of holes such that the annular lumen and the plurality of flow channels are configured to promote delivery of said fluid through the plurality of holes, the annular lumen having a constant cross-sectional area along the longitudinal axis.