Patent ID: 8308683

Claim:
A catheter for delivering an agent to an inner surface of a patient's body lumen wall, comprising: a) an elongated shaft having a distal shaft section and an agent delivery lumen; b) a frame fixedly mounted to the distal shaft section and defining a plurality of cells arranged in an array in a longitudinal and a circumferential direction, the array having at least two rows of cells at different locations along said catheter and the cells configured to expand radially from a collapsed configuration to an expanded configuration against the patient's body lumen wall, wherein the frame is biased to the expanded configuration; c) agent delivery ports disposed in selected cells of said array, the agent delivery ports configured for fluid communication with the agent delivery lumen; and d) a plurality of funnel shaped membranes disposed in the selected cells of said array, each funnel shaped membrane having a mouth in contact with the frame in its radially expanded configuration, and a relatively narrower base adjacent the shaft at the agent delivery distal port defining a chamber in fluid communication with the agent delivery lumen; e) whereby each mouth of the membranes when the frame is in the expanded configuration is configured to isolate an area of the patient's body lumen wall with an associated chamber to expose the area to agent delivered from the shaft agent delivery lumen into the chamber of the membrane.