Rotatable control mechanism for steerable catheter

A - Human Necessities – 61 – M

Patent

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A61M 25/01 (2006.01)

Patent

CA 2283247

A steerable catheter control mechanism comprises a rotatable driver and a deflection device responsive to the driver to selectively secure a pair of control wires. The control wires are positioned such that rotation of the driver reduces the effective deflection device radius while loading a selected wire in tension, thereby maintaining a relatively constant torque acting on the driver and minimizing operator fatigue. The deflection device is also responsive to the driver to selectively place one of the control wires in tension while maintaining the other wire in a static state thereby minimizing control wire fatigue.

L'invention concerne un mécanisme de commande de cathéter orientable, comprenant un dispositif d'entraînement rotatif et un dispositif de déflexion réagissant au dispositif d'entraînement et servant à fixer, sélectivement, deux fils de commande. On place les fils de commande de manière qu'une rotation du dispositif d'entraînement réduit le rayon effectif du dispositif de déflexion lorsqu'on tend le fil sélectionné, maintenant ainsi un couple relativement constant sur le dispositif d'entraînement et réduisant au maximum la fatigue de l'utilisateur. Le dispositif de flexion réagit également au dispositif d'entraînement, tendant sélectivement l'un des fils de commande, tout en immobilisant l'autre, ce qui permet de réduire au maximum la fatigue des fils de commande.

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