| 摘要 |
<p>A bi-directional catheter comprises an elongated body, a tip section and a control handle. The body has at least one lumen extending therethrough. The tip section is mounted at the distal end of the catheter body and has at least two diametrically-opposed off-axis lumens. The first off-axis lumen is smaller than the second off-axis lumen. The control handle is mounted at the proximal end of the catheter body and comprises at least two moveable members longitudinally movable between first and second positions. The catheter further comprises first and second puller wires. The proximal end of each puller wire is connected to an associated movable member of the control handle. Each puller wire extends from the control handle through a lumen of the catheter body. The first puller wire extends into the first lumen in the tip section, and the second puller wire extends into the second lumen in the tip section. The distal end of each puller wire is anchored to the tip section. An electrode is mounted on the tip section, and a lead wire is electrically connected to the electrode. The lead wire extends through the second lumen in the tip section, through a lumen in the catheter body and into the control handle. Proximal movement of a movable member relative to the catheter body results in proximal movement of the puller wire associated with that movable member relative to the catheter body, and thus deflection of the tip section in the direction of the lumen in which that puller wire extends. <IMAGE> <IMAGE></p> |
