Patent ID: 8740849
Filing Date: 2014-06-03
Classification: A61B,A61M

Abstract:
1. A catheter for fluid delivery through at least two injection needles into tissue outside of the interior wall of a target vessel of a human body, the catheter comprising: a catheter body having a central axis extending in a longitudinal direction and also having a fluid injection lumen; at least two needle guiding elements adapted to advance distally and expand outwardly toward the interior wall of the target vessel; a mechanical support structure in between the expanded needle guiding elements and the central axis, the mechanical support structure adapted to support each expanded needle guiding element in a direction selected from the group consisting of a) radial, in which the mechanical support structure supports each needle guiding element in a radial direction, and b) lateral, in which the mechanical support structure supports each needle guiding element in a lateral direction, wherein the mechanical support structure is a central buttress support located internal to a distal portion of the catheter body, wherein the central buttress support comprises a deflection surface; and at least two injection needles each having an injection lumen in fluid communication with the fluid injection lumen of the catheter body, the at least two injection needles adapted to be advanced outwardly, guided by the at least two needle guiding elements to penetrate the interior wall of the target vessel, the at least two injection needles having a distal opening for fluid delivery into the tissue outside of the interior wall of the target vessel.