Patent ID: 8568355

Claim:
An agent delivery catheter configured for delivering an agent to an injection site in a wall of a patient's body lumen, comprising: a) an elongated shaft having a lumen for receiving a tubular member defining a needle-through lumen therein extending from the proximal end of the tubular member to a needle-through port in a side of a distal section of the tubular member, and a needle slidably disposed in the needle-through lumen having a retracted configuration and an extended configuration in which the needle extends laterally from the tubular member through the needle-through port and through an opening in the elongated shaft; and b) a radially-self expanding open-walled frame on the distal section of the shaft tubular member, the frame including a plurality of longitudinally extending struts, each strut having a first end fixedly secured to the shaft tubular member and a free opposite second end, the frame having a collapsed configuration, and a radially expanded configuration in which the free ends of the frame expand radially outward into contact with the body lumen wall, and which extends around the circumference and along an outer surface of the shaft tubular member to substantially center the shaft tubular member distal section at the location of the port in the body lumen in the expanded configuration, such that the expandable frame in the expanded configuration supports the shaft tubular member in a position spaced away from the body lumen wall around the circumference of the shaft tubular member at the location of the port, and the needle slidably exits the needle-through lumen in the extended configuration through the port spaced away from the body lumen wall as the expandable frame supports the shaft tubular member at the port.