Patent ID: 8465451

Claim:
A catheter for treating a hollow anatomical structure (HAS), said catheter comprising: one or more shafts which extend away from a proximal end of said catheter toward a distal end thereof, a first shaft of said one or more shafts defining a central axis of said catheter and having an atraumatic tip on a distal end thereof to minimize injury as the catheter is advanced within an HAS; an HAS constriction energy source located on said first shaft at or near said distal end of said first shaft and configured to apply energy to a wall of said HAS; and a transmural fluid delivery channel separate from said HAS constriction energy source and comprising a second shaft of said one or more shafts, said second shaft being radially expandable from said central axis; wherein a distal end of said transmural fluid delivery channel has a first position near said first shaft and said central axis and a second position radially expanded from said first shaft and said central axis, the second position allowing fluid to be injected into tissue outside of and surrounding said wall of said HAS; further comprising a source of tumescent fluid which is in fluid communication with said fluid delivery channel.