US 12,478,511 B2
Distributed negative pressure wound therapy system incorporating an absorbent dressing and piezo-electric pump
Christopher Brian Locke, San Antonio, TX (US)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Filed by KCI Licensing, Inc., San Antonio, TX (US)
Filed on Oct. 19, 2023, as Appl. No. 18/381,967.
Application 18/381,967 is a division of application No. 17/255,095, granted, now 11,826,234, previously published as PCT/US2019/037190, filed on Jun. 14, 2019.
Claims priority of provisional application 62/691,429, filed on Jun. 28, 2018.
Prior Publication US 2024/0041661 A1, Feb. 8, 2024
Int. Cl. A61F 13/05 (2024.01); A61F 13/00 (2024.01); A61F 13/0206 (2024.01); A61M 1/00 (2006.01)
CPC A61F 13/05 (2024.01) [A61F 13/0206 (2013.01); A61M 1/74 (2021.05); A61M 1/884 (2021.05); A61M 1/915 (2021.05); A61M 1/95 (2021.05); A61M 1/962 (2021.05); A61M 1/966 (2021.05); A61F 2013/0028 (2013.01); A61M 1/73 (2021.05); A61M 1/732 (2021.05); A61M 1/80 (2021.05); A61M 1/985 (2021.05); A61M 2205/0294 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3324 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/3344 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/7518 (2013.01); A61M 2205/8256 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy system, comprising:
a wound dressing comprising a sealing layer, an absorbent layer adjacent to the sealing layer, and a fluid interface attached to at least one of the sealing layer or the absorbent layer;
at least one pump fluidly coupled to the fluid interface, the at least one pump configured to apply negative pressure to the fluid interface to draw fluid from the wound dressing via the fluid interface;
a pressure sensor fluidly coupled to the wound dressing, the pressure sensor configured to detect a fluid pressure of the wound dressing;
a control housing remote from the wound dressing; and
an electrical coupler configured to removably connect the control housing to the at least one pump, wherein the control housing includes an alarm circuit configured to detect an impedance load of the electrical coupler and output an indication of an alarm condition based on the impedance load indicating that the control housing is in an activated state and is not coupled to the at least one pump by the electrical coupler.