Patent ID: 8512290

Claim:
An apparatus for delivering a therapeutic or diagnostic agent to a target site within tissue, comprising: an inner tubular body comprising a proximal end, a tissue piercing distal end, a delivery lumen extending therebetween, and one or more outlet ports on the distal end communicating with the delivery lumen; an outer tubular body having a proximal end, a distal end, an aspiration lumen extending therebetween, and one or more aspiration ports on the distal end communicating with the aspiration lumen, the inner tubular body slidably received in the outer tubular body such that the distal end of the inner tubular body is advanceable beyond the distal end of the outer tubular member, wherein the outer tubular body is configured to be percutaneously advanced into the tissue adjacent the target site; a source of agent coupled to the proximal end of the inner tubular body such that the source of agent communicates with the delivery lumen; and a source of vacuum coupled to the proximal end of the outer tubular body such that the source of vacuum communicates with the aspiration lumen.