| 摘要 |
A continuous pump relay system for injecting medication fluids or discharging liquids into an intravenous (IV) line tube, comprising a plurality of at least two drivers to operate respective plungers with end seals located in syringe type containers; tubes are connected to the vessels and feed the liquid into and through a reflux barrier; each line has a pressure sensor to generate a input signal that goes to a controller, which in turn generates an output signal to move each driver independently, calculated from the respective pressure input signal. Valves are located in each line between the container and reflux barrier that open when a container is connected to the system and close when the container is removed. The pressure sensor measures the differential pressure across the valve. When the medicament has been discharged from the first container, the driver moves the plunger backwards to reduce pressure within the tube. A second driver then operates in a forward direction to increase the pressure in the tubing up to a setpoint or reference pressure value. A control loop within the controller varies the change in the rate of the pressure increase until the pressure setpoint is reached.
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