Patent ID: 8083493
Filing Date: 2011-12-27
Classification: A61B

Abstract:
1. A surgical fluid pump system for transporting a sterile fluid from a source to a surgical instrument, comprising: a drive system; and a pump system comprising: an inlet for establishing a fluid connection to said source; an outlet for establishing a fluid connection to said surgical instrument; first and second pumps, each of said first and second pumps comprises a pump conduit connectable to the surgical instrument by way of output valves, wherein the pump conduits are connected by way of suction conduits and suction valves to a common suction conduit that can be connected to the source by way of a releasable coupling; each of said first and second pumps having a piston that contacts said sterile fluid to apply a pressure to said sterile fluid, each of said pumps having a suction cycle for drawing in the sterile fluid and an output cycle for ejecting the sterile fluid, wherein a separately controllable drive motor is provided for each of said first and second pumps; and an electronic control system for controlling the drive motors by setting a piston velocity profile for each of the first and second pumps; wherein the pump system is releasably connected to the drive system, and said drive system drives said pump system in such a way that said suction cycle of each pump is shorter than said output cycle of each pump and in such a way that the output cycles of the first and second pumps overlap so that said fluid is supplied to said outlet with a substantially constant pressure.