Patent ID: 7468057

Claim:
An injection catheter comprising: a catheter body comprising flexible tubing having proximal and distal ends, a stiffening tube disposed within the flexible tubing, and at least one lumen therethrough; a needle control handle at the proximal end of the catheter body, the needle control handle comprising: an outer body having a piston chamber therein; a piston slidably mounted within the piston chamber; and a compression spring in the piston chamber between the outer body and the piston; an injection needle extending through the catheter body and at least a portion of the needle control handle and having a proximal end attached to one of the outer body and the piston and a distal end within the catheter body; whereby longitudinal movement of one of the outer body and the piston relative to the other of the outer body and the piston compresses the compression spring and moves the injection needle distally relative to the catheter body so that the distal end of the injection needle extends outside the distal end of the catheter body.