US 12,343,140 B2
Method and apparatus for improving lag correction during in vivo measurement of analyte concentration with analyte concentration variability and range data
Erwin Satrya Budiman, Fremont, CA (US)
Assigned to ABBOTT DIABETES CARE INC., Alameda, CA (US)
Filed by ABBOTT DIABETES CARE INC., Alameda, CA (US)
Filed on Feb. 12, 2024, as Appl. No. 18/438,948.
Application 18/438,948 is a continuation of application No. 17/073,852, filed on Oct. 19, 2020, granted, now 11,896,371.
Application 17/073,852 is a continuation of application No. 15/910,927, filed on Mar. 2, 2018, granted, now 10,842,420, issued on Nov. 24, 2020.
Application 15/910,927 is a continuation of application No. 14/431,168, granted, now 9,907,492, issued on Mar. 6, 2018, previously published as PCT/US2013/060471, filed on Sep. 18, 2013.
Claims priority of provisional application 61/705,929, filed on Sep. 26, 2012.
Prior Publication US 2024/0180450 A1, Jun. 6, 2024
Int. Cl. A61B 5/145 (2006.01); A61B 5/00 (2006.01); G16H 50/20 (2018.01)
CPC A61B 5/14532 (2013.01) [A61B 5/14503 (2013.01); A61B 5/14546 (2013.01); A61B 5/7203 (2013.01); A61B 5/7235 (2013.01); A61B 5/7275 (2013.01); G16H 50/20 (2018.01); A61B 2560/0475 (2013.01); G06F 2218/10 (2023.01)] 23 Claims
OG exemplary drawing
 
1. A method for lag correction of data from a glucose sensor, comprising:
defining a scaling factor for lag correction;
receiving glucose data from the glucose sensor, the sensor data including historical glucose sensor data over a plurality of intervals;
defining a probability density function of the glucose data over at least a portion of one of the plurality of intervals;
determining a value of the scaling factor based on the probability density function and a normalized analyte variability ratio, wherein the value of the scaling factor is computed based on (1) a historic glucose-based, predicted low glucose value corresponding to the probability density function, (2) a first normalized glucose variability, and (3) a second normalized glucose variability; and
computing lag corrected values based on the determined value of the scaling factor.