| 摘要 |
In one aspect, a system for delivery of a medical fluid to a patient includes a pump system including a plurality of at least three chambers. Each of the plurality of chambers includes an inlet through which fluid is drawn into the chamber and an outlet from which fluid is expelled from the chamber. The pump system further includes a common outlet channel in fluid communication with the outlet of each of the plurality of chambers and a plurality of at least three pistons. Each of the pistons is slidably disposed within a respective one of the plurality of chambers. The system further includes a drive system including a cam shaft including a plurality of at least three cam lobes. Each of the plurality of cam lobes has a profile. The drive system further includes a plurality of at least three cam lobe followers. Each of the cam lobe followers is in operative connection with a respective one of the plurality of cam lobes and is adapted to be placed in operative connection with a respective one of the plurality of pistons. The profile of each of the plurality of cam lobes is adapted to provide a transient increase or spike in calculated theoretical output of the pump system to reduce periodic variation in measured output thereof. |
