System for instructing removal of cataract tissue

Details System for instructing removal of cataract tissue System for instructing removal of cataract tissue

A - Human Necessities

61

F

A61F 9/007 (2006.01)

Patent

CA 2560116

A system and method for instructing removal of cataract tissue. Software generated vacuum signal indicating vacuum force to be applied within the shaft of a phacoemulsification needle. Software responsive to a monitoring vacuum force signal reaching a threshold level as a result of occlusion of the tip of the needle by cataract tissue. Said signal activates to and fro oscillation of needle tip, or application of ultrasonic power. Additional software instructions include; user-initiated oscillation, an ultrasonic termination signal, or the vacuum monitoring signal dropping below an activation threshold level.

L'invention concerne un système et un procédé d'instructions destinés au retrait du tissu de la cataracte. Un signal de vide produit par un logiciel (80) indique une force de vide à appliquer dans la tige d'une aiguille de phaco-émulsification (120). Le logiciel répond à un signal de force de vide de surveillance atteignant un niveau seuil (20) du fait que la pointe de l'aiguille présente une occlusion engendrée par le tissu de la cataracte (30). Ledit signal active une oscillation alternative de la pointe (35) de l'aiguille ou l'application de puissance ultrasonore (37). Des instructions logicielles supplémentaires comprennent : une oscillation initiée par l'utilisateur, un signal de terminaison ultrasonore (42) ou le signal de surveillance de vide tombant au-dessous d'un niveau seuil d'activation (40).

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