| 摘要 |
A deflectable catheter having a handle that can be modified pfor unidirectional or multidirectional deflection is provided. The catheter comprises an elongated, flexible tubular catheter body having proximal and distal ends and a lumen extending therethrough. A control handle is provided at the proximal end of the catheter body. The control handle comprises a handle body comprising an outer wall and a generally hollow interior, wherein the proximal end of the catheter body is fixedly attached to the handle body, a slidable puller wire anchor longitudinally movable within the interior of the handle body relative to the handle body and catheter body, a sleeve slidably mounted on the exterior of the handle body, and a selection pin fixedly attached to the sleeve and extending into the interior of the handle body proximal to the slidable puller wire anchor. In use, proximal movement of the sleeve and selection pin relative to the handle body causes the selection pin to contact the slidable puller wire anchor and move the slidable puller wire anchor proximally relative to the handle body and catheter body. The catheter further comprises a puller wire extending through the lumen of the catheter body and into the control handle. The proximal end of the puller wire is anchored to the slidable puller wire anchor, and the distal end of the puller wire is anchored in the distal end of the catheter body. In use, proximal movement of the slidable puller wire anchor relative to the catheter body results in deflection of the catheter body. For multidirectional deflection, the cather comprises a plurality of puller wires and a plurality of corresponding puller wire anchors.
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