Algorithm sensor augmented bolus estimator for semi-closed loop infusion system

US8226556B2 · kind B2 · utility

Assignee

• MEDTRONIC MINIMED, INC. · US

Inventors

• Andrew C. Hayes · Simi Valley, US
• John J. Mastrototaro · Los Angeles, US
• Sheldon B. Moberg · Thousand Oaks, US
• John C. Mueller, Jr. · Simi Valley, US
• H. Bud Clark · Calabasas, US
• Mike Charles Vallet Tolle · San Fernando, US
• Gary L. Williams · Gardena, US
• Bihong Wu · Oak Park, US
• Garry M. Steil · Pasadena, US

Key dates

• Filing date: May 6, 2009
• Grant date: Jul 24, 2012
• Expiry date: Dec 26, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H50/50
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An infusion system is for infusing a fluid into the body of a patient. The infusion system includes at least one sensor for monitoring blood glucose concentration of the patient and an infusion device for delivering fluid to the patient. The sensor produces at least one sensor signal input. The infusion device uses the at least one sensor signal input and a derivative predicted algorithm to determine future blood glucose levels. The infusion device delivers fluid to the patient when future blood glucose levels are in a patient's target range. The infusion device is capable of suspending and resuming fluid delivery based on future blood glucose levels and a patient's low shutoff threshold. The infusion device suspends fluid delivery when future blood glucose levels falls below the low shutoff threshold. The infusion device resumes fluid delivery when a future blood glucose level is above the low shutoff threshold.