US 12,128,168 B2
Pressure sampling and supply of negative pressure in negative pressure wound therapy
Raymond Carr, Tampa, FL (US); William W. Gregory, Gainesville, FL (US); and Felix C. Quintanar, Hull (GB)
Assigned to Smith & Nephew, Inc., Memphis, TN (US)
Filed by Smith & Nephew, Inc., Memphis, TN (US)
Filed on Feb. 7, 2020, as Appl. No. 16/784,699.
Application 16/784,699 is a continuation of application No. 15/540,979, granted, now 10,556,045, previously published as PCT/US2015/061165, filed on Nov. 17, 2015.
Claims priority of provisional application 62/097,765, filed on Dec. 30, 2014.
Prior Publication US 2020/0171219 A1, Jun. 4, 2020
Int. Cl. A61M 1/00 (2006.01)
CPC A61M 1/73 (2021.05) [A61M 1/74 (2021.05); A61M 1/96 (2021.05); A61M 1/982 (2021.05); A61M 2205/15 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3337 (2013.01); A61M 2205/3341 (2013.01); A61M 2205/3344 (2013.01); A61M 2205/3365 (2013.01); A61M 2205/50 (2013.01); A61M 2205/502 (2013.01); A61M 2205/581 (2013.01); A61M 2205/587 (2013.01); A61M 2205/702 (2013.01); A61M 2205/8206 (2013.01); A61M 2209/084 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An apparatus for applying negative pressure therapy to a wound, the apparatus comprising:
a source of negative pressure configured to be fluidically connected via a fluid flow path with a wound covered by a wound dressing;
a pressure sensor configured to monitor pressure in the fluid flow path; and
a controller in communication with the pressure sensor, the controller being configured to:
determine a first pressure in the fluid flow path from the pressure sensor without synchronizing determination of pressure in the fluid flow path with at least one of opening or closing of at least one of an inlet valve or an outlet valve of the source of negative pressure responsive to an activity level of the source of negative pressure being below a first activity threshold associated with the source of negative pressure being active and being above a second activity threshold associated with the source of negative pressure being inactive, and
operate the source of negative pressure using the first pressure in the fluid flow path.