Atherectomy power control system

Details Atherectomy power control system Atherectomy power control system

A - Human Necessities

61

B

A61B 17/22 (2006.01) A61B 17/32 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2332431

A power control system maintains the power dissipated by an atherectomy burr during an ablation procedure at or below a predetermined threshold. A power control circuit monitors the speed and torque provided by a prime mover that rotates the ablation burr in order to calculate the power dissipated under no- load conditions. During ablation, the power dissipated is determined and the no-load power is subtracted to calculate the ablation power. The control circuit adjusts the speed of the prime mover to maintain the ablation power at or below the predetermined threshold.

Ce système de commande d'énergie pour athérectomie maintient à une valeur de seuil prédéterminée ou en dessous de celle-ci l'énergie dissipée par une fraise d'athérectomie durant une ablation. Un circuit de commande d'énergie contrôle la vitesse et le couple d'un moteur premier faisant tourner la fraise servant à l'ablation et ce, afin de calculer l'énergie dissipée en situation de charge nulle. Durant l'ablation, l'énergie dissipée est déterminée et l'énergie de charge nulle soustraite afin de calculer l'énergie d'ablation. Le circuit de commande adapte la vitesse du moteur premier de façon à maintenir l'énergie d'ablation à une valeur de seuil prédéterminée ou en dessous de celle-ci.

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