US 11,654,228 B2
Status indication for negative pressure wound therapy
Ben Alan Askem, Leeds (GB); Iacopo Claudio Ferrari, Milan (IT); Matteo Foini, Milan (IT); Paolo Forzani, Milan (IT); Christopher John Fryer, York (GB); Allan Kenneth Frazer Grugeon Hunt, Beverley (GB); and Christian Riva, Milan (IT)
Assigned to Smith & Nephew PLC, Watford (GB)
Filed by Smith & Nephew PLC, Watford (GB)
Filed on Jun. 12, 2020, as Appl. No. 16/900,413.
Application 16/900,413 is a continuation of application No. 15/536,260, granted, now 10,682,446, previously published as PCT/IB2015/002535, filed on Dec. 21, 2015.
Claims priority of provisional application 62/095,721, filed on Dec. 22, 2014.
Prior Publication US 2020/0368407 A1, Nov. 26, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/00 (2006.01); F04B 43/04 (2006.01); F04B 45/047 (2006.01); F04B 49/06 (2006.01); B29C 65/16 (2006.01); F04B 51/00 (2006.01); B29C 65/00 (2006.01); B29C 65/78 (2006.01); F04B 49/12 (2006.01); B29L 31/00 (2006.01)
CPC A61M 1/96 (2021.05) [A61M 1/73 (2021.05); A61M 1/732 (2021.05); A61M 1/74 (2021.05); A61M 1/743 (2021.05); A61M 1/82 (2021.05); A61M 1/86 (2021.05); A61M 1/962 (2021.05); A61M 1/982 (2021.05); B29C 65/1635 (2013.01); B29C 65/1677 (2013.01); B29C 65/7802 (2013.01); B29C 65/7805 (2013.01); B29C 66/54 (2013.01); B29C 66/7392 (2013.01); F04B 43/04 (2013.01); F04B 45/047 (2013.01); F04B 49/065 (2013.01); F04B 49/12 (2013.01); F04B 51/00 (2013.01); A61M 2205/0272 (2013.01); A61M 2205/15 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/42 (2013.01); A61M 2205/50 (2013.01); A61M 2205/505 (2013.01); A61M 2205/52 (2013.01); A61M 2205/581 (2013.01); A61M 2205/583 (2013.01); A61M 2205/584 (2013.01); A61M 2205/587 (2013.01); A61M 2205/70 (2013.01); A61M 2205/7536 (2013.01); A61M 2205/8206 (2013.01); A61M 2207/00 (2013.01); B29C 65/7808 (2013.01); B29C 66/71 (2013.01); B29C 66/8227 (2013.01); B29C 66/8242 (2013.01); B29L 2031/7496 (2013.01); B29L 2031/753 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy system comprising:
a negative pressure source configured to provide a negative pressure to a wound covered by a wound dressing via a fluid flow path that fluidically connects the negative pressure source to the wound dressing;
a pressure sensor configured to measure pressure in the fluid flow path; and
processing circuitry configured to control the negative pressure source, the processing circuitry further configured to:
in response to determining that a first pressure value measured by the pressure sensor at a first time and a second pressure value measured by the pressure sensor at a second time are between high and low pressure thresholds:
determine a first rate of pressure change using the first and second pressure values; and
cause provision of a status indication in response to determining that the first rate of pressure change satisfies a threshold rate of change.