Peri-vascular tissue ablation catheter with support structures
First Claim
1. A catheter for fluid delivery, the catheter including:
- a catheter body having a central axis extending in a longitudinal direction and a fluid injection lumen;
a tubular member having a distal position and a proximal position;
at least two self-expanding guide tubes adapted to expand outwardly toward a luminal surface of a target vessel when the tubular member is moved between the distal position and the proximal position;
a handle located near a proximal end of the catheter, the handle adapted to move the tubular member in the longitudinal direction;
at least two injector tubes with distal injection needles, each of the at least two injector tubes with distal injection needles having an injection lumen in fluid communication with the fluid injection lumen of the catheter body, the at least two injector tubes with distal injection needles adapted to be advanced outwardly, guided by the at least two self-expanding guide tubes to penetrate the luminal surface of the target vessel, each of the at least two injector tubes with distal injection needles having a distal opening adapted for fluid delivery into a tissue outside of the luminal surface of the target vessel; and
a mechanical support structure, the mechanical support structure is adapted to provide support for the at least two self-expanding guide tubes in a direction selected from the group consisting of a) radial, in which the mechanical support structure is adapted to support each guide tube of the at least two guide tubes in a radial direction, and b) lateral, in which the mechanical support structure is adapted to support each guide tube of the at least two guide tubes in a lateral direction.
1 Assignment
0 Petitions
Accused Products
Abstract
An intravascular catheter for peri-vascular or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, such as nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system may also include a controls the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The catheter may also include structures which provide radial and/or lateral support to the guide tubes so that the guide tubes expand uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.
237 Citations
19 Claims
-
1. A catheter for fluid delivery, the catheter including:
-
a catheter body having a central axis extending in a longitudinal direction and a fluid injection lumen; a tubular member having a distal position and a proximal position; at least two self-expanding guide tubes adapted to expand outwardly toward a luminal surface of a target vessel when the tubular member is moved between the distal position and the proximal position; a handle located near a proximal end of the catheter, the handle adapted to move the tubular member in the longitudinal direction; at least two injector tubes with distal injection needles, each of the at least two injector tubes with distal injection needles having an injection lumen in fluid communication with the fluid injection lumen of the catheter body, the at least two injector tubes with distal injection needles adapted to be advanced outwardly, guided by the at least two self-expanding guide tubes to penetrate the luminal surface of the target vessel, each of the at least two injector tubes with distal injection needles having a distal opening adapted for fluid delivery into a tissue outside of the luminal surface of the target vessel; and a mechanical support structure, the mechanical support structure is adapted to provide support for the at least two self-expanding guide tubes in a direction selected from the group consisting of a) radial, in which the mechanical support structure is adapted to support each guide tube of the at least two guide tubes in a radial direction, and b) lateral, in which the mechanical support structure is adapted to support each guide tube of the at least two guide tubes in a lateral direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification