Patent ID: 9044578
Filing Date: 2015-06-02
Classification: A61M

Abstract:
1. 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 which is in fluid communication with an agent delivery distal port in the distal shaft section; b) a frame made from a self-expanding material mounted on the distal shaft section which is biased to expand from a collapsed configuration to an expanded configuration against the patient's body lumen wall, the frame having a loop which remains adjacent to the lumen wall when the frame is in the expanded configuration; and c) an expandable membrane having a mouth secured to the loop of the frame and a base secured to the elongated shaft at the agent delivery distal port so that an inner surface of the membrane defines a chamber in fluid communication with the agent delivery lumen, the mouth of the membrane being movable with the loop when the frame is placed in the expanded configuration such that the mouth of the membrane sealingly engages a portion of the patient's body lumen wall to thereby expose the portion of the wall to agent delivered from the shaft agent delivery lumen and contained within the chamber of the membrane.