US 12,029,549 B2
Apparatus and method for wound volume measurement
Edward Yerbury Hartwell, Hull (GB)
Assigned to Smith & Nephew PLC, Watford (GB)
Filed by Smith & Nephew PLC, Watford (GB)
Filed on Jul. 20, 2021, as Appl. No. 17/381,037.
Application 14/455,200 is a division of application No. 12/746,492, granted, now 8,814,841, issued on Aug. 26, 2014, previously published as PCT/GB2008/050917, filed on Oct. 7, 2008.
Application 17/381,037 is a continuation of application No. 15/994,818, filed on May 31, 2018, abandoned.
Application 15/994,818 is a continuation of application No. 14/946,468, filed on Nov. 19, 2015, granted, now 9,987,402, issued on Jun. 5, 2018.
Application 14/946,468 is a continuation of application No. 14/455,200, filed on Aug. 8, 2014, granted, now 9,192,332, issued on Nov. 24, 2015.
Claims priority of application No. 0723855 (GB), filed on Dec. 6, 2007.
Prior Publication US 2022/0008640 A1, Jan. 13, 2022
Int. Cl. A61B 5/107 (2006.01); A61B 5/00 (2006.01); A61F 13/00 (2024.01); A61M 1/00 (2006.01)
CPC A61B 5/107 (2013.01) [A61B 5/0055 (2013.01); A61B 5/1073 (2013.01); A61B 5/445 (2013.01); A61B 5/7278 (2013.01); A61B 5/742 (2013.01); A61F 13/00 (2013.01); A61M 1/73 (2021.05); A61B 5/6843 (2013.01); A61M 1/982 (2021.05); A61M 2205/15 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3344 (2013.01); A61M 2205/50 (2013.01); A61M 2230/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy device comprising:
a negative pressure source configured to be connected to a wound via a fluid flow path and to provide negative pressure to the wound; and
a controller programmed to operate the negative pressure source, the controller further programmed to:
monitor a cumulative fluid flow rate in the fluid flow path, the cumulative fluid flow rate comprising a first fluid flow rate due to operation of the negative pressure source and a second fluid flow rate due to a leak in the fluid flow path,
determine the second fluid flow rate due to the leak in the fluid flow path,
determine a volume of the wound based on the cumulative fluid flow rate and the second fluid flow rate due to the leak in the fluid flow path, and
provide an indication of the volume of the wound.