US 12,456,199 B2
Methods and systems for characterizing fluids from a patient
Siddarth Satish, Portola Valley, CA (US); and Kevin Miller, Mountain View, CA (US)
Assigned to Stryker Corporation, Portage, MI (US)
Filed by Stryker Corporation, Portage, MI (US)
Filed on Apr. 25, 2024, as Appl. No. 18/645,714.
Application 18/645,714 is a continuation of application No. 18/211,819, filed on Jun. 20, 2023, granted, now 12,002,211.
Application 18/211,819 is a continuation of application No. 17/854,629, filed on Jun. 30, 2022, granted, now 11,727,572, issued on Aug. 15, 2023.
Application 17/854,629 is a continuation of application No. 16/986,771, filed on Aug. 6, 2020, granted, now 11,410,311, issued on Aug. 9, 2022.
Application 16/986,771 is a continuation of application No. 15/154,929, filed on May 13, 2016, granted, now 10,789,710, issued on Sep. 29, 2020.
Claims priority of provisional application 62/232,255, filed on Sep. 24, 2015.
Claims priority of provisional application 62/162,154, filed on May 15, 2015.
Prior Publication US 2024/0273729 A1, Aug. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 7/00 (2017.01); G01F 1/00 (2022.01); G01F 1/661 (2022.01); G06F 18/24 (2023.01); G06T 7/62 (2017.01); G06V 10/764 (2022.01)
CPC G06T 7/0016 (2013.01) [G06F 18/24 (2023.01); G06T 7/62 (2017.01); G06V 10/764 (2022.01); G01F 1/00 (2013.01); G01F 1/661 (2013.01); G06T 2207/10016 (2013.01); G06T 2207/10024 (2013.01); G06T 2207/30024 (2013.01); G06T 2207/30104 (2013.01); G06V 2201/03 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method for estimating a volume of blood within fluids being drawn through a conduit with a system including a camera, one or more processors, and a display, the method comprising:
receiving a time series of images of a conduit image region of the conduit, wherein the conduit image region includes a shallow section in which a dimension of the conduit along an optical axis of the camera is such that opacity of the fluids from redness associated with red blood cells or hemoglobin is limited to permit pixel color visualization in the time series of images;
estimating a concentration of a blood component of the fluids based on the pixel color visualization;
estimating a volumetric flow rate of the fluids;
estimating the volume of blood passing through the conduit based on the estimated concentration of the blood component and the estimated volumetric flow rate; and
displaying, on a display, the estimated volume of blood.