Control system for a phacoemulsification handpiece

Details Control system for a phacoemulsification handpiece Control system for a phacoemulsification handpiece

A - Human Necessities

61

F

A61F 9/007 (2006.01) B06B 1/02 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2305297

A system and method for tuning and controlling ultrasonic handpieces by varying the frequency of the drive signal that is fed to the handpiece by a discrete dither increment. A digital signal processor may be used to measure the response of the handpiece to the varying drive signal and compare these responses to determine the probable value of the actual series resonance. The output of the digital signal processor is used to generate control parameters embodied within an appropriate control signal, which is fed to the source of the drive signal in order to alter aspects of the drive signal.

Cette invention se rapporte à un système et à un procédé servant à syntoniser et à commander un instrument chirurgical à main à ultrasons, en faisant varier la fréquence du signal d'attaque qui est injecté dans l'instrument chirurgical par une augmentation incrémentielle discrète du signal de superposition. Un processeur de signaux numériques peut être utilisé pour mesurer la réponse de l'instrument chirurgical au signal d'attaque variable et pour comparer ces réponses, afin de déterminer la valeur probable de la résonance en série effective. La sortie du processeur de signaux numériques sert à produire des paramètres de commande incorporés dans un signal de commande approprié, lequel est injecté dans la source du signal d'attaque, afin d'en modifier les aspects.

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