×

Expandable catheter system for fluid injection into and deep to the wall of a blood vessel

  • US 10,118,004 B2
  • Filed: 06/12/2015
  • Issued: 11/06/2018
  • Est. Priority Date: 08/24/2011
  • Status: Active Grant
First Claim
Patent Images

1. An intravascular nerve ablation system for circumferential delivery of an ablative fluid to a volume of tissue in proximity to a vessel wall of a target vessel comprising:

  • a catheter body having a central axis extending in a longitudinal direction and a fluid injection lumen;

    at least a first guide tube and a second guide tube, each guide tube having a distal end and a central lumen, each guide tube having a distal portion that is expandable between a first position aligned with the central axis and a second position inclined away from the central axis;

    at least a first injector tube and a second injector tube, each injector tube having an injection lumen for delivering the ablative fluid, the first and second injector tubes located coaxially inside of the first and second guide tubes respectively, each injector tube having a sharpened injection needle, each injection needle having injection egress, wherein the distal ends of the first guide tube and the second guide tube are configured to press against, but not penetrate, the vessel wall of the target vessel as the first injector tube and the second injector tube are advanced into the volume of tissue; and

    wherein the first injector tube and the second injector tube are configured to advance simultaneously relative to the first guide tube and the second guide tube, respectively, until a penetration depth limitation mechanism stops forward movement of the first injector tube and the second injector tube.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×