Patent ID: 6623474
Filing Date: 2003-09-23
Classification: A61B,A61M

Abstract:
An injection catheter comprising:a catheter body comprising a flexible tubing having 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, the tip section having a needle passage extending therethough, wherein the needle passage has a proximal region having a proximal diameter and a distal region having a distal diameter less than the proximal diameter; a needle control handle at the proximal end of the catheter body; an injection needle extending through the tip section, catheter body, and needle control handle and having a proximal end attached to the needle control handle and a distal end within the needle passage, wherein the injection needle is longitudinally slidable within the tip section so that its distal end can extend beyond the distal end of the tip section upon suitable manipulation of the needle control handle; and a needle stop mounted on a portion of the injection needle that is positioned within the proximal region of the needle passage, the needle stop having a distal end that is sized to prevent passage of the portion of the injection needle on which the needle stop is mounted from passing into the distal region of the needle passage; whereby the needle stop limits the distance that the injection needle can be extended beyond the distal end of the tip section.