| 摘要 |
The present invention is a closed loop system for transfer of a fluid through a line (18) between a reservoir (10) and a vessel (12) in a manner to provide a flow-related parameter at a selected value. The system will have major use as a non-gravity-dependent infusion device. The system comprises a pressurizable reservoir (10) containing a quantity of the fluid; means to control the flow of the fluid being transferred in a conduit between the reservoir and the vessel (16), including means to pressurize the reservoir; reference means (20) with an output related to a selectable value of the flow-related parameter; means to measure the flow-related parameter (24); means to compare the outputs (22) of the reference means (20) and the measuring means (24); and means responsive to the ouptut (26) of the comparator means (22) to adjust the fluid flow control means (16) to provide the selected value of the flow-related parameter. Normally, the flow-related parameter will be the fluid flow rate in the conduit or the change of fluid volume in the reservoir. |
