US 12,121,648 B2
Canister status determination
Edward Vernon-Harcourt, Pulborough (GB); Jake Turner, Cambridge (GB); and Benjamin Gordon, Cambridge (GB)
Assigned to Smith & Nephew PLC, Watford (GB)
Filed by Smith & Nephew PLC, Watford (GB)
Filed on Jan. 20, 2023, as Appl. No. 18/099,718.
Application 18/099,718 is a continuation of application No. 17/245,976, filed on Apr. 30, 2021, granted, now 11,559,620.
Application 17/245,976 is a continuation of application No. 16/845,348, filed on Apr. 10, 2020, granted, now 10,994,060, issued on May 4, 2021.
Application 16/845,348 is a continuation of application No. 15/851,020, filed on Dec. 21, 2017, granted, now 10,617,801, issued on Apr. 14, 2020.
Application 15/851,020 is a continuation of application No. 14/454,181, filed on Aug. 7, 2014, granted, now 9,878,074, issued on Jan. 30, 2018.
Application 14/454,181 is a continuation of application No. 12/672,468, granted, now 8,843,327, issued on Sep. 23, 2014, previously published as PCT/GB2008/002346, filed on Jul. 9, 2008.
Claims priority of application No. 0715259 (GB), filed on Aug. 6, 2007.
Prior Publication US 2023/0226268 A1, Jul. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/00 (2006.01)
CPC A61M 1/96 (2021.05) [A61M 1/732 (2021.05); A61M 1/74 (2021.05); A61M 1/90 (2021.05); A61M 1/982 (2021.05); A61M 2205/3331 (2013.01); A61M 2205/3344 (2013.01); A61M 2205/3382 (2013.01); A61M 2209/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A therapy apparatus comprising:
a negative pressure source configured to provide a negative pressure wound therapy via a fluid flow path to a wound covered by a wound dressing;
a pressure sensor configured to measure a pressure in the fluid flow path; and
a controller configured to:
compare a first pressure curve derived from the pressure in the fluid flow path over a duration of time to a second pressure curve, and
determine a status of the negative pressure wound therapy from a comparison of the first pressure curve to the second pressure curve.