US 12,109,354 B2
Negative-pressure therapy with adjustable instillation pump chamber
Benjamin Andrew Pratt, Poole (GB); and Christopher Brian Locke, Bournemouth (GB)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
Filed on Apr. 1, 2021, as Appl. No. 17/220,706.
Application 17/220,706 is a division of application No. 16/036,357, filed on Jul. 16, 2018, granted, now 10,994,062.
Claims priority of provisional application 62/533,729, filed on Jul. 18, 2017.
Prior Publication US 2021/0220531 A1, Jul. 22, 2021
Int. Cl. A61M 1/00 (2006.01); A61M 3/02 (2006.01); A61M 27/00 (2006.01)
CPC A61M 1/92 (2021.05) [A61M 1/784 (2021.05); A61M 1/85 (2021.05); A61M 3/0208 (2014.02); A61M 3/022 (2014.02); A61M 3/0283 (2013.01); A61M 27/00 (2013.01); A61M 1/78 (2021.05); A61M 3/0202 (2021.05)] 14 Claims
OG exemplary drawing
 
1. A system for providing negative-pressure and instillation therapy, the system comprising:
a negative-pressure source configured to provide negative pressure;
a controller electrically coupled to the negative-pressure source and configured to turn on the negative-pressure source during a negative-pressure interval and turn off the negative-pressure source during a venting interval;
an actuator comprising a dosing piston and a priming piston configured to be coupled to the negative-pressure source; and
a distribution system comprising a dosing chamber, a priming chamber fluidly coupled to the dosing chamber, a fluid port configured to be fluidly coupled to the dosing chamber and to the negative-pressure source, and a fluid fitting configured to couple the dosing piston and the priming piston to the fluid port;
wherein the actuator is configured further to open the priming chamber and expand the dosing chamber during the negative-pressure interval, and close the priming chamber and contract the dosing chamber during the venting interval.