Patent ID: 7905864

Claim:
An injection catheter comprising: a catheter body comprising an outer wall, proximal and distal ends and at least one lumen therethrough; a tip section comprising a flexible tubing having proximal and distal ends, wherein the proximal end of the tip section is mounted at the distal end of the catheter body; a needle control handle at the proximal end of the catheter body; an injection needle comprising elongated tubing extending through the tip section, catheter body, and needle control handle and having a proximal end attached to the needle control handle, the injection needle also having a distal region within the tip section and an open distal end, wherein the injection needle is longitudinally slidable within the tip section so that its distal region can extend beyond the distal end of the tip section upon suitable manipulation of the needle control handle, and further wherein the distal region of the injection needle has four fluid ports along its length in addition to the open distal end of the needle, wherein a first pair of fluid ports is positioned on one side of the injection needle and a second-pair of fluid ports is positioned on an opposite side of the injection needle, wherein each pair of fluid ports includes a distal-most fluid port and a proximal-most fluid port, the distal-most fluid port of each pair of fluid ports being positioned about two inches from the distal end of the injection needle, and the proximal-most fluid port of each pair of fluid ports being distanced about 0.02 inches from its corresponding distal-most fluid port; a protective tube mounted coaxially around the injection needle; whereby, in use, fluid passes out of the needle through the open distal end of the needle and through the fluid ports along the length of the distal region.