Drug delivery device and method

Details Drug delivery device and method Drug delivery device and method

2007-11-06

2007-11-06

Lucchesi, Nicholas (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C604S131000, C604S151000

Reexamination Certificate

active

10446811

ABSTRACT:
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.

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A high-precision piezoresistive Flow Sensor for microdosing applications; Boillat www.sensorsmag.com/articles/0900/129/main.shtml.

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