Abstract: A bi-directional steerable catheter comprising an elongated, tubular catheter body having at least one lumen, a tip section comprising flexible tubing having at least two lumens and fixedly attached to the distal end of the catheter body, and a control handle mounted to the proximal end of the catheter body. The control handle comprises a generally hollow handle housing, a generally tubular core extending longitudinally within the housing, and a generally circular spur gear rotatably mounted within the handle housing. First and second pistons are slidably mounted on the diametrically opposed sides of the spur gear and have puller wires attached to their distal ends. A longitudinally movable thumb control is fixedly attached to the first piston and accessible from outside the handle housing.

Abstract: A steerable catheter comprises a catheter body, a tip section mounted to the distal end of the catheter body, and a control handle mounted to the proximal end of the catheter body. The control handle comprises a housing having a piston chamber and a piston slidably mounted in the piston chamber. The piston is longitudinally movable between proximal and distal positions. A longitudinal groove having proximal and distal ends and extends along a portion of the length of the piston. A puller wire anchor is slidably disposed within the longitudinal groove. A puller wire extends from the control handle, through a lumen in the catheter body and into a lumen in the tip section. The proximal end of the puller wire is fixedly attached to the puller wire anchor. A set screw is fixedly attached to the handle housing and extends radially inwardly into the longitudinal groove in the piston.

Abstract: A multi-directional steerable catheter comprises a catheter body, a tip section attached to the distal end of the catheter body, and a control handle mounted at its distal end to the proximal end of the catheter body. The control handle comprises a housing having a piston chamber extending therethrough and a piston assembly having proximal and distal portions slidably mounted in the piston chamber and longitudinally movable between proximal and distal positions. The proximal portion of the piston assembly comprises a distal section comprising a plurality of notches at its proximal end, a proximal section comprising a plurality of longitudinal grooves about its entire circumference separated by dividing walls having angled distal ends, and a circumferential recess between the proximal section and distal section.