Apparatus, system and method for fluid delivery
Inventors
Lanier, JR., Gregory R. • Lanigan, Richard J. • Fichera, Stephen L. • Kamen, Dean • Gray, Larry B.
Assignees
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Publication Number
US-8881774-B2
Publication Date
2014-11-11
Expiration Date
Abstract
A fill adapter for filling a reservoir. The fill adapter includes a button assembly actuator and a pump chamber plunger actuator hingably attached to the button assembly actuator, wherein the actuation of the button assembly actuator actuates the pump chamber plunger actuator and wherein the pump chamber plunger actuator actuates a pump chamber membrane before the at least one button assembly is actuated.
Core Innovation
The invention provides closed-loop control of a shape-memory-actuated infusion pump using an on-time PWM drive signal based on a measured battery voltage signal. A discrete time integration estimates a total infused volume from delivered actuation, and a volume signal is compared with target volumes. The controller provides feedback from volume sensor measurements to adjust subsequent basal-cycle target volumes.
The control architecture includes a volume controller with a PI controller and a feedforward controller that may use a lookup function, and also includes an SMA controller that provides feedback/feedforward loops and switching current delivery using a switching assembly. The system uses multiple microprocessors with supervisory and command processing, including interactions among safety/diagnostic logic, to support dose delivery and validation based on the controller’s volume estimation and sensor feedback.
The described system further includes wireless control software and a wireless remote control assembly, together with detection and diagnostic functions associated with infusion performance, including occlusion detection, leak detection or a bleed-down test, and reservoir empty detection. In addition, an off-board volume/integrity verification station is described, including a weight-scale filling/verification station.
Claims Coverage
Not explicitly described in patent.
Not explicitly described in patent.
Stated Advantages
Documented Applications
No documented applications found
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