US 11,684,287 B2
System and methods for video-based monitoring of vital signs
Paul S. Addison, Scotland (GB); David Foo, Glasgow (GB); and Dominique Jacquel, Edinburgh (GB)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Mar. 25, 2022, as Appl. No. 17/656,541.
Application 17/656,541 is a continuation of application No. 16/888,011, filed on May 29, 2020, granted, now 11,317,828.
Application 16/888,011 is a continuation of application No. 16/450,010, filed on Jun. 24, 2019, granted, now 10,702,188, issued on Jul. 7, 2020.
Application 16/450,010 is a continuation of application No. 15/432,063, filed on Feb. 14, 2017, granted, now 10,398,353, issued on Sep. 3, 2019.
Claims priority of provisional application 62/297,682, filed on Feb. 19, 2016.
Claims priority of provisional application 62/335,862, filed on May 13, 2016.
Claims priority of provisional application 62/399,741, filed on Sep. 26, 2016.
Prior Publication US 2022/0211296 A1, Jul. 7, 2022
Int. Cl. A61B 5/103 (2006.01); A61B 5/00 (2006.01); A61B 5/024 (2006.01); A61B 5/1171 (2016.01); A61B 5/1455 (2006.01); A61B 5/0205 (2006.01); A61B 5/145 (2006.01); A61B 5/08 (2006.01)
CPC A61B 5/1032 (2013.01) [A61B 5/0077 (2013.01); A61B 5/0205 (2013.01); A61B 5/02416 (2013.01); A61B 5/1176 (2013.01); A61B 5/14542 (2013.01); A61B 5/14551 (2013.01); A61B 5/441 (2013.01); A61B 5/6843 (2013.01); A61B 5/7203 (2013.01); A61B 5/7221 (2013.01); A61B 5/7278 (2013.01); A61B 5/743 (2013.01); A61B 5/746 (2013.01); A61B 5/748 (2013.01); A61B 5/7425 (2013.01); A61B 5/7485 (2013.01); A61B 5/024 (2013.01); A61B 5/0816 (2013.01); A61B 2562/0233 (2013.01); A61B 2576/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A video-based method of measuring a patient's vital sign, comprising:
receiving a video signal from a video camera, the video signal having a field of view;
extracting from the video signal a time-varying color signal for each of a plurality of regions;
identifying a frequency content of each time-varying color signal;
selecting two or more non-adjacent regions that have a shared frequency content comprising a modulation at a shared frequency;
combining the color signals of the selected regions to thereby provide a combined color signal;
measuring a vital sign from the combined color signal;
outputting the vital sign for further processing or display; and
updating the selected regions by adding or removing regions from the selected regions based on the frequency content of each region.