Methods and devices to deliver injected agents to an aneurysm site

An injection catheter comprising:

• a proximal end, a distal end, at least one injection lumen and at least one exit lumen,
• wherein said injection lumen comprises an injection port adapted to deliver bioactive material(s) to a treatment site,
• wherein said exit lumen comprises an exit port adapted to receive and transport fluids accumulating at said treatment site that would otherwise contribute to an increased volume and pressure in the area caused by the injection of said bioactive materials and wherein said fluids exit said treatment site through said exit port and said exit lumen into said catheter and are removed from said treatment site, wherein said injection catheter maintains a near-constant pressure at said treatment site;
• wherein said injection catheter is part of a system comprising a delivery catheter and a stent or stent graft, wherein said delivery catheter comprises a retractable sheath and said injection catheter, wherein when said stent or stent graft is loaded into said delivery catheter, a portion of said injection catheter containing said injection port is disposed between said retractable sheath and said stent or stent graft.