US 12,109,039 B2
Systems and methods of identifying motion of a subject
Shyamnath Gollakota, Seattle, WA (US); Rajalakshmi Nandakumar, Seattle, WA (US); and Nathaniel F. Watson, Seattle, WA (US)
Assigned to UNIVERSITY OF WASHINGTON, Seattle, WA (US)
Filed by University of Washington, Seattle, WA (US)
Filed on Apr. 18, 2023, as Appl. No. 18/302,725.
Application 18/302,725 is a continuation of application No. 16/836,530, filed on Mar. 31, 2020, granted, now 11,660,046.
Application 16/836,530 is a continuation of application No. 15/532,981, granted, now 10,638,972, previously published as PCT/US2015/053288, filed on Sep. 30, 2015.
Claims priority of provisional application 62/152,519, filed on Apr. 24, 2015.
Claims priority of provisional application 62/089,130, filed on Dec. 8, 2014.
Prior Publication US 2024/0081733 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/00 (2006.01); A61B 5/08 (2006.01); A61B 5/11 (2006.01); A61B 5/113 (2006.01)
CPC A61B 5/4818 (2013.01) [A61B 5/0816 (2013.01); A61B 5/1126 (2013.01); A61B 5/1135 (2013.01); A61B 5/742 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system for monitoring movements of a subject, the system comprising:
at least one processor; and
at least one memory device operably coupled to the at least one processor and storing processor instructions that, when executed by the system via the at least one processor, cause the system to perform operations comprising:
emitting audio sweep signals, from an electronic device, toward an abdomen or chest of a subject spaced apart from and out of contact with the electronic device,
wherein individual audio sweep signals linearly sweep from a first frequency less than 20 kHz to a second, higher frequency over a predetermined time duration;
acquiring echo data from a microphone operatively coupled to the electronic device, wherein the echo data includes data corresponding to individual audio sweep signals reflected by the subject toward the microphone;
demodulating the acquired echo data to obtain a motion signal indicative of respiratory motion of the subject;
detecting one or more amplitude peaks in the motion signal; and
outputting an indication of movement of the abdomen or chest of the subject based one or more of the detected peaks, wherein the indication of movement is associated with one or more medical conditions of the subject.