METHOD AND SYSTEM FOR CALIBRATING ORTHOGONALLY REDUNDANT SENSOR DEVICES

• Main Authors: LIU, Mike C, LI, Xiaolong, ZHONG, Yuxiang, YANG, Ning, VARSAVSKY, Andrea
• Format: Patent
• Language: English; French; German
• Published: 31.08.2022
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

A method of calibrating an orthogonally redundant sensor device for determining the concentration of glucose in a body of a user, said sensor device including at least an electrochemical glucose sensor and an optical glucose sensor, has the steps of receiving a first signal from the electrochemical glucose sensor; receiving a second signal from the optical glucose sensor; performing a respective integrity check on each of said first and second signals; determining whether the first signal can be calibrated, and whether the second signal can be calibrated, wherein said determination is made based on whether the first signal and the second signal pass or fail their respective integrity checks; if it is determined that the first signal can be calibrated, calibrating said first signal to generate an electrochemical sensor glucose (SG) value; if it is determined that the second signal can be calibrated, calibrating said second signal to generate an optical sensor glucose (SG) value; and fusing said electrochemical SG value and said optical SG value to obtain a single, fused sensor glucose value for the orthogonally redundant sensor device. The steps are performed by a microprocessor in a corresponding glucose monitoring system including the sensors and a transmitter.