US 12,403,235 B2
Wound therapy system with internal alternating orifice
Javier Gonzalez, San Antonio, TX (US); and Shannon C. Ingram, Bulverde, TX (US)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
Filed on Sep. 30, 2022, as Appl. No. 17/957,739.
Application 17/957,739 is a division of application No. 16/363,928, filed on Mar. 25, 2019, granted, now 11,491,054.
Claims priority of provisional application 62/802,034, filed on Feb. 6, 2019.
Prior Publication US 2023/0016336 A1, Jan. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/00 (2006.01); A61B 5/00 (2006.01); A61F 13/05 (2024.01); A61M 3/02 (2006.01); A61F 13/00 (2006.01); A61F 13/84 (2006.01); A61M 35/00 (2006.01)
CPC A61M 1/742 (2021.05) [A61B 5/445 (2013.01); A61F 13/05 (2024.01); A61M 1/71 (2021.05); A61M 1/77 (2021.05); A61M 1/777 (2021.05); A61M 1/90 (2021.05); A61M 1/92 (2021.05); A61M 1/96 (2021.05); A61M 1/962 (2021.05); A61M 3/0258 (2013.01); A61F 2013/00174 (2013.01); A61F 2013/8494 (2013.01); A61M 1/73 (2021.05); A61M 1/74 (2021.05); A61M 1/964 (2021.05); A61M 1/966 (2021.05); A61M 3/0202 (2021.05); A61M 35/006 (2013.01); A61M 2205/3337 (2013.01); A61M 2205/3344 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A control circuit for a negative pressure therapy system, the control circuit communicatively coupled to a pump that is fluidly communicable with a sealed space, a sensor fluidly coupled to the sealed space, and a valve fluidly coupled between a sealed space and a surrounding environment, the control circuit configured to:
actuate the pump to draw fluid from the sealed space,
repeatedly actuate the valve between an open position and a closed position, allowing a controlled rate of airflow through the valve;
receive measurements of a pressure in the sealed space generated by the sensor during a pressure decay in response to the controlled rate of airflow through the valve; and
in response to the measurements of the pressure and the controlled rate of airflow, determine a volume of the sealed space.