| abstract |
A dosing system with a holding chamber capable of administering multiple doses of drug from a metered dose inhaler. The holding chamber has an actuation detector, a flow detector and / or a metered dose inhaler identification device that serves to identify a metered dose inhaler coupled to the holding chamber, and a display. In another embodiment, a user interface for administering a drug is in communication with the drug delivery device, a mask portion having a seal portion with a contact sensor responsive to contact with a user, and a sensor to provide a feed bag. It has a display. In another embodiment, a drug administration system is provided in a housing defining a flow channel and a flow channel, and a valve capable of moving between a first configuration and a second configuration in response to flow. The valve is comprised of an electroactive polymer, and the valve is reconfigured between a first resistance state and a second resistance state in response to the electrical stimulus. |