Apparatus and method for controlling insulin infusion with state variable feedback
US8777924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2012 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Dec 3, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/201
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An infusion system, which may be a closed loop, or “semi-closed-loop”, infusion system, uses state variable feedback to control the rate at which fluid is infused into a user's body. The closed loop system includes a sensor system, a controller, and a delivery system. The “semi-closed-loop” system further includes prompts that provide indications to the user prior to fluid delivery. The sensor system includes a sensor for monitoring a condition of the user and produces a sensor signal which is representative of the user's condition. The delivery system infuses a fluid into the user at a rate dictated by the commands from the controller. The system may use three state variables, e.g., subcutaneous insulin concentration, plasma insulin concentration, and insulin effect, and corresponding gains, to calculate an additional amount of fluid to be infused with a bolus and to be removed from the basal delivery of the fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.