Method and apparatus for deflecting a catheter or lead

Details Method and apparatus for deflecting a catheter or lead Method and apparatus for deflecting a catheter or lead

A - Human Necessities

61

M

A61M 25/01 (2006.01) A61B 1/005 (2006.01)

Patent

CA 2331722

An apparatus for deflecting a catheter or lead, for example a deflectable stylet or guidewire. The device includes an outer tubular member, a tension member mounted within the outer tubular member and coupled to the outer member and a handle mounted at the proximal end of the tubular member. The handle includes a major handle portion which has a rotatable knob located at its distal end, surrounding a proximal portion of the outer tubular member and provided with inwardly directed threading and an inner slider member provided with outwardly directed threading engaging the inwardly directed threading of the knob. The slider is advanced or retracted longitudinally within the handle by rotation of the knob but is rotationally fixed with regard to the major handle portion. The outer tubular member is engaged at its proximal end with the inner slider member and the tension wire is fixedly engaged with the major handle portion, whereby rotation of the knob results in advancement or retraction of the outer tubular member relative to the tension wire and the major portion of the handle, which in turn causes the deflection of the outer tubular member.

Technique et dispositif permettant de défléchir un cathéter ou une dérivation, par exemple un stylet ou un fil-guide souple. Le dispositif comprend un élément tubulaire externe; un élément de tension, monté à l'intérieur de l'élément tubulaire et couplé à l'élément tubulaire; et une poignée, montée à l'extrémité proximale de l'élément tubulaire. La poignée comprend une partie principale, qui porte à son extrémité distale un bouton rotatif entourant une partie proximale de l'élément tubulaire et présentant un filetage dirigé vers l'intérieur. Le dispositif comprend également un élément coulissant interne présentant un filetage dirigé vers l'extérieur, qui est en contact avec le filetage dirigé vers l'intérieur du bouton. La rotation du bouton provoque l'avancée ou la rétraction longitudinale de l'élément coulissant à l'intérieur de la poignée, sans provoquer sa rotation par rapport à la partie principale de ladite poignée. L'élément tubulaire externe est, au niveau de son extrémité proximale, en contact avec l'élément coulissant interne, tandis que le fil de tension est en contact fixe avec la partie principale de la poignée. La rotation du bouton provoque l'avancée ou la rétraction de l'élément tubulaire externe par rapport au fil de tension et à la partie principale de la poignée, ce qui à son tour provoque la déflexion de l'élément tubulaire.

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