| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drug delivery device designed not to contain air in drugs. <P>SOLUTION: A drug delivery device includes a pressurized reservoir in communication with a flow path to an outlet. The flow path includes two normally-closed valves and a flow restriction. A pressure measurement arrangement measures a differential fluid pressure between two points along the flow path which span at least part of the flow restriction, one of the points being between the valves. A controller selectively opens the valves to deliver a defined quantity of the liquid medicament to the outlet. <P>COPYRIGHT: (C)2011,JPO&INPIT |
