Patch-sized fluid delivery systems and methods

摘要

A patch-sized fluid delivery device may include a reusable portion and a disposable portion. The disposable portion may include components that come into contact with the fluid, while the reusable portion may include only components that do not come into contact with the fluid. Redundant systems, such as redundant controllers, power sources, motor actuators, and alarms, may be provided. Alternatively or additionally, certain components can be multi-functional, such a microphones and loudspeakers that may be used for both acoustic volume sensing and for other functions and a coil that may be used as both an inductive coupler for a battery recharger and an antenna for a wireless transceiver. Various types of network interfaces may be provided in order to allow for remote control and monitoring of the device.

主权项

1. A delivery device for delivering an infusion medium to a user, the device comprising:
a first housing portion adapted to be secured to a user; a second housing portion configured to be selectively engaged with and disengaged from the first housing portion to allow disposal of the first housing portion without disposing of the second housing portion, the first housing portion having an enclosed interior volume; a drive shaft supported by the second housing portion, for movement in a generally linear dimension; a shape-memory alloy operatively connected to the drive shaft, to selectively move the drive shaft in the generally linear dimension; and a pump device comprising:
a housing provided with a barrel having a generally linear, longitudinal axis, a port extending to the barrel and configured for connection to a reservoir, the port in fluid flow communication with the barrel and configured for connection in fluid flow communication with an injection site;a plunger located in the barrel and having a surface for receiving a drive force from the drive shaft when the first housing portion and the second housing portion are engaged,wherein the plunger is moveable with movement of the drive shaft along the longitudinal axis of the barrel between fill and dispense positions, such that:in the fill position, the plunger is moved to a position to allow fluid flow communication through the port and into the barrel; andin the dispense position, the plunger is moved to a position wherein fluid flow is obstructed through the port and to reduce the volume of the barrel to force fluid in the piston chamber out of the port.