公开(公告)号：US20240341635A1

公开(公告)日：2024-10-17

申请号：US18603875

申请日：2024-03-13

Applicant: Medtronic MiniMed, Inc.

Inventor： Raymond M. Russell ,  Steven Jacks

IPC: A61B5/145

CPC classification number: A61B5/14532 ,  A61B2560/0228 ,  A61B2560/0238

Abstract: A glucose sensor includes a working electrode, sensor electronics configured to periodically measure electrode current signal (Isig) values for the working electrode and counter voltage values (Vcntr) for the glucose sensor, one or more processors, and one or more processor-readable media. The one or more processor-readable media stores instructions which, when executed by the one or more processors, cause performance of: generating Electrochemical Impedance Spectroscopy (EIS) parameter values for the working electrode based on an EIS procedure; estimating a reaction surface area of the glucose sensor based on least one of Isig values, Vcntr values, or the EIS parameter values; determining a difference between the estimated reaction surface area and an expected reaction surface area of the glucose sensor; comparing the determined difference to a predetermined threshold value; and adjusting a calibration factor when the determined difference is below the predetermined threshold value.