Bidirectional steerable catheter with deflectable distal tip

Details Bidirectional steerable catheter with deflectable distal tip Bidirectional steerable catheter with deflectable distal tip

A - Human Necessities

61

M

A61M 25/01 (2006.01)

Patent

CA 2221805

A bidirectional catheter (10) with a deflectable tip (14) at a distal end includes a handle (12) at a proximal end (15) and a tubular member (11) extending between the tip and the handle. The handle includes a first piston member (16) slidably mounted in a handle base (20) with proximal ends of steering wires (22, 23) secured in the handle. The steering wires extend through the tubular member with respective distal ends thereof secured to circumferentially spaced portions (24, 25) of the distal end tip. Axial displacement of the piston member in a second direction conversely urges deflection of the distal end tip in a second direction by tensioning the other wire relative to the first wire. The piston member can include another piston member (17) slidable in the first piston member with the proximal ends of the steering wires secured in the first memtioned piston member and the handle member, respectively, and with the other piston member supporting a proximal end of the tubular member.

Un cathéter bidirectionnel (10) doté d'un embout (14) pouvant être défléchi à une extrémité distale comprend une poignée (12) à une extrémité proximale (15) et un élément tubulaire (11) s'étendant entre l'embout et la poignée. La poignée comprend un premier piston (16) monté coulissant dans la base (20) de celle-ci, les extrémités proximales des câbles d'orientation (22, 23) étant fixées dans la poignée. Les câbles d'orientation s'étendent dans l'élément tubulaire dont les extrémités distales respectives sont fixées à des sections espacées sur la circonférence (24, 25) de l'embout distal. Le déplacement axial du piston dans un second sens pousse réciproquement l'embout distal dans un second sens en le faisant fléchir par la tension de l'autre câble par rapport au premier. Le piston peut comporter un autre piston (17) pouvant coulisser dans le premier piston par les extrémités proximales des câbles d'orientation fixés, respectivement, dans le premier piston et la poignée, l'autre piston supportant une extrémité proximale de l'élément tubulaire.

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