Method of operating microsurgical instruments

Details Method of operating microsurgical instruments Method of operating microsurgical instruments

A - Human Necessities

61

F

A61F 9/007 (2006.01) A61B 17/00 (2006.01) A61B 17/22 (2006.01)

Patent

CA 2379602

A method of operating a microsurgical instrument, such as a vitrectomy probe (10), is disclosed. The probe includes a port (16) for receiving tissue and an inner cutting member (14). A flow of tissue is induced into the port with a vacuum source, and the member is actuated in a cyclic manner to open and close the port over a plurality of cut rates. A duty cycle of the member is varied with the cut rate to vary the flow of the tissue into the port. The method yields the ability to adjust flow rate into the probe and aperture of the probe for a given cut rate so as to effectively perform a wide variety of vitreoretinal surgical objectives.

L'invention concerne un procédé de fonctionnement d'un instrument microchirurgical, tel qu'une sonde de vitrectomie (10). Ladite sonde comprend un orifice (16) permettant d'accueillir un tissu et un élément coupant interne (14). Un flux de tissu est amené dans l'orifice au moyen d'une source de vide, et l'élément est actionné de manière cyclique afin d'ouvrir et de fermer l'orifice selon plusieurs vitesses de découpe. On fait varier un cycle de travail de l'élément avec la vitesse de découpe pour faire varier le flux de tissu dans l'orifice. Le procédé permet d'adapter le débit du flux dans la sonde et l'ouverture de la sonde pour une vitesse de découpe donnée, de manière à réaliser efficacement une large diversité d'objectifs chirurgicaux vitréo-rétiniens.

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