US 12,033,738 B2
Negative pressure wound therapy system using eulerian video magnification
Yeswanth Gadde, Pocklington (GB); Allan Kenneth Frazer Grugeon Hunt, Beverley (GB); and Marcus Damian Phillips, Wakefield (GB)
Assigned to Smith & Nephew PLC, Watford (GB)
Appl. No. 16/613,768
Filed by Smith & Nephew PLC, Watford (GB)
PCT Filed May 11, 2018, PCT No. PCT/EP2018/062207
§ 371(c)(1), (2) Date Nov. 14, 2019,
PCT Pub. No. WO2018/210693, PCT Pub. Date Nov. 22, 2018.
Claims priority of provisional application 62/506,524, filed on May 15, 2017.
Prior Publication US 2020/0078499 A1, Mar. 12, 2020
Int. Cl. A61M 1/00 (2006.01); A61F 13/00 (2024.01); A61F 13/05 (2024.01); G16H 20/30 (2018.01); G16H 20/40 (2018.01); G16H 30/40 (2018.01)
CPC G16H 20/30 (2018.01) [A61F 13/05 (2024.01); A61M 1/73 (2021.05); A61M 1/74 (2021.05); A61M 1/916 (2021.05); A61M 1/95 (2021.05); A61M 1/96 (2021.05); A61M 1/98 (2021.05); G16H 20/40 (2018.01); G16H 30/40 (2018.01); A61M 1/982 (2021.05); A61M 2205/3306 (2013.01); A61M 2205/3313 (2013.01); A61M 2205/3569 (2013.01); A61M 2205/3592 (2013.01); A61M 2210/04 (2013.01); A61M 2230/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A wound therapy system, comprising:
a source of negative pressure configured to be in fluidic communication with a wound dressing placed over a wound, the source of negative pressure configured to provide negative pressure under the wound dressing;
a visualization sensor positioned above the wound, the visualization sensor configured to collect video data of the wound, the video data comprising a red color value; and
a controller in communication with both the source of negative pressure and the visualization sensor, the controller configured to:
amplify the red color value by Eulerian video magnification;
determine a blood flow treatment factor from the amplified red color value, the blood flow treatment factor determined from the differences between region values measured in the video data;
cause the source of negative pressure to increase or decrease a level of provided negative pressure if the blood flow treatment factor differs from a threshold, the threshold corresponding to a desired level of blood flow in the wound;
cause the source of negative pressure to stop providing negative pressure in response to a change in the blood flow treatment factor; and
increase the level of provided negative pressure if the amplified red color value shows a decrease from a baseline red color value, the baseline red color value collected at an earlier time than the red color value.