| 摘要 |
The automatically controlled pump supplies pressurized irrigation fluid via an output line to a surgical site. The pump is coupled to a fluid source via an input line. The pump system includes a motor, a motor housing, a pump disposed within a pump housing and fluid input and fluid output ports defined by the pump housing. The pump has a rotatably disposed impeller coupled to the motor. The input and output lines are respectively coupled to the fluid input and output ports. The motor is powered by at least one battery and preferably a plurality of batteries. A switch turns ON and OFF the motor and is controlled by fluid flow above a system minimal flow. The system operates in conjunction with a manual flow control valve (a fluid control valving system) actuated by an operator downstream of the battery powered pump. The fluid flow sensor is typically mounted downstream of the pump output, fluid flow is monitored at the pump output and, based upon fluid flow above a system minimal flow, a negative buoyancy poppet leaves a "leaky" valve seat, moves into a large flow segment of a valve chamber pressure and turns ON the motor and the pump due to a changed state of a position sensor (preferably, an optical sensor) and the application of battery power to the motor driving the pump. The method of automatically controlling a pump includes providing a battery powered motor mechanically coupled to the pump, the step of monitoring fluid flow above a system minimal flow and turning ON and OFF the motor based upon fluid flow above the system minimum.
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