Patent ID: 8568353
Filing Date: 2013-10-29
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 fixedly mounted to the distal shaft section which is configured to reversibly radially expand from a collapsed to a radially expanded configuration against the patient's body lumen wall, having a proximal end, a distal end, and a radially expandable body section having a closed loop located between the proximal and distal ends of the frame; and c) a funnel shaped membrane having a mouth secured to the closed loop of the body section of the frame so that a circumference of the mouth of the membrane reversibly radially expands with the frame away from the shaft, and a relatively narrower base fixedly secured to the 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, and a longitudinal axis oriented substantially perpendicular to a longitudinal axis of the shaft at said distal port, such that the entire mouth of the membrane is configured to sealingly engage a portion of the patient's body lumen wall in the expanded configuration to thereby expose the portion of the wall to agent delivered from the agent delivery lumen and contained within the chamber of the membrane.