Steerable stylet with enhanced torsional transfer strength

Details Steerable stylet with enhanced torsional transfer strength Steerable stylet with enhanced torsional transfer strength

A - Human Necessities

61

M

A61M 25/00 (2006.01) A61M 25/01 (2006.01)

Patent

CA 2422034

A steerable guidewire or stylet (2) that has increased torsional strength is disclosed. A braided structure located in the vicinity of the distal end of the guidewire or stylet provides for a more efficient transfer or rotational force over the length of the guidewire or stylet provides for a more efficinet tansfer of rotationnal force over the length of the guideire or stylet. The stylet inlcudesan outer member, and a pull-wire coupled to the distal tip of the outer member such that when tension is applied to the pull-wire, the distal tip of the outer member is deflected. The distal tip of the outer member may be formed of a material having superelastic properties whereas the proximal portion of the stylet may be formed of a material having more torsional strength. According to another aspect of the invention, a handle (4) is provided that includes both rotatable and slidable mechanisms to facilitate deflection of the distal tip portion of the outer member.

Fil-guide ou stylet (2) pouvant être dirigé, qui possède une résistance améliorée à la torsion. Une structure tressée située à proximité de l'extrémité distale du fil-guide ou stylet fournit un transfert plus efficace de la force de rotation sur la longueur du fil-guide ou stylet. Ledit stylet comporte un élément externe, et un fil de traction couplé à la pointe distale de l'élément externe de manière telle que lorsqu'une tension est exercée sur le fil de traction, la pointe distale de l'élément externe est déviée. La pointe distale de l'élément externe peut être constituée d'une matière possédant des propriétés superélastiques, tandis que la partie proximale du stylet peut être constituée d'une matière présentant une plus grande résistance à la torsion. Selon un autre aspect de la présente invention, ledit stylet comporte une poignée (4) dotée d'un mécanisme tant rotatif que coulissant pour faciliter la déflexion de la pointe distale de l'élément externe.

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