Patent ID: 6589229
Filing Date: 2003-07-08
Classification: A61M,Y10S

Abstract:
A wearable self-contained device for delivering a liquid medication by continuous infusion into a patient, comprising:a disposable portion comprising a housing, a reservoir in said housing for containing a supply of said liquid medication and for delivering said liquid medication under pressure wherein said reservoir comprises at least one Belleville spring element for pressurizing the liquid medication contained in said reservoir, a delivery cannula carried by said housing, and a flow channel for conducting said liquid medication from said reservoir to said delivery cannula; a reusable portion removably connected to said disposable portion, said reusable portion comprising a closed loop control circuit for maintaining a predetermined flow of said liquid medication through said flow channel; a flow control valve in at least one of said disposable and reusable portions for controlling the flow of said liquid medication through said flow channel from said reservoir to said delivery cannula; an actuator in at least one of said disposable and reusable portions for actuating said flow control valve, said actuator being electrically connectable to said closed loop control circuit; and a flow sensor in at least one of said disposable and reusable portions for sensing the flow of said liquid medication through said flow channel, said flow sensor being electrically connectable to said closed loop control circuit.