Patent ID: 7879011

Claim:
An injection catheter for selectively injecting material to a target structure adjacent to a body vessel, the injection catheter comprising: an elongate body having a distal and a proximal end; a holdfast near the distal end configured to anchor the injection catheter within a body vessel, wherein the holdfast comprises a vacuum-type holdfast having at least two vacuum ports on the outer longitudinal surface of the elongated body that are connectable via channels in the elongate body to a vacuum source such that a vacuum may be applied through the ports to a vessel wall to anchor the holdfast onto the vessel wall; and an extendable directional injector having a distal end and a proximal end, the directional injector extendable from the elongate body from a region proximal to the distal end of the holdfast and located between the at least two vacuum ports, wherein the directional injector comprises a tissue-penetrating section at the distal end and a fluid delivery section located proximal to the tissue-penetrating section, the fluid delivery section configured to deliver fluid in a direction that is different from the direction of tissue penetration, wherein the tissue penetrating section comprises an angled portion with a sharpened tip, and wherein the fluid delivery section is positioned on the angled portion and wherein the fluid delivery section delivers fluid in a direction normal to the angled portion and wherein the fluid delivery section includes a filter through which fluid must pass before it can exit the fluid delivery section.