Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1995-12-26
1998-11-03
Bockelman, Mark
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
604 28, 604 31, 604 34, 607107, 606169, A61B 1720
Patent
active
058301763
ABSTRACT:
Varying flow rate and/or the fluid pressure head through a surgical instrument by selecting which of a plurality of fluid lines will supply fluid through the infusion line of the instrument. The fluid lines connect with supply ports of a common connector that has a common discharge port in fluid connection with the infusion line. The fluid lines are each in fluid connection with either a common fluid source, fluid sources at different elevations, or fluid sources at different or the same pressures. Flow control may be based on opening and closing of valves in the flow lines or operating and stopping operation of pumps or vacuum devices. A controller may determine which flow control to implement based on sensing of pressure changes in the eye or on known capacities of the pumps or vacuum devices. The sensing may be effected with a pressure transducer within the eye, but spaced from the infusion and aspiration lines of the surgical instrument.
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