US 12,233,198 B2
System and method to clear conduits of fluids after instillation to a wound
Christopher Brian Locke, Bournemouth (GB)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Appl. No. 17/634,495
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Aug. 11, 2020, PCT No. PCT/IB2020/057543
§ 371(c)(1), (2) Date Feb. 10, 2022,
PCT Pub. No. WO2021/033076, PCT Pub. Date Feb. 25, 2021.
Claims priority of provisional application 62/889,364, filed on Aug. 20, 2019.
Prior Publication US 2022/0288296 A1, Sep. 15, 2022
Int. Cl. A61M 1/00 (2006.01)
CPC A61M 1/964 (2021.05) [A61M 1/772 (2021.05); A61M 1/90 (2021.05); A61M 1/92 (2021.05); A61M 1/962 (2021.05); A61M 1/966 (2021.05); A61M 1/982 (2021.05); A61M 1/83 (2021.05); A61M 2205/3382 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A wound therapy system, comprising:
a wound dressing apparatus fluidly coupled to a wound;
a pneumatic pump fluidly coupled to the wound dressing apparatus and configured to apply a negative pressure to the wound dressing apparatus;
a removable fluid canister coupled to the wound dressing apparatus and the pneumatic pump;
a sensor fluidly coupled to the removable fluid canister and configured to determine a negative pressure of the removable fluid canister;
a valve fluidly coupled between an ambient environment and the wound dressing apparatus at a location that is upstream of the wound, the valve being configured to allow airflow between ambient environment and the wound when the valve is open; and
a controller communicatively coupled to the pneumatic pump, the sensor, and the valve and configured to:
determine a volume of instillation fluid that has been delivered to the wound;
operate the pneumatic pump and the valve to apply the negative pressure to the wound dressing apparatus to purge a first portion of the instillation fluid from the wound dressing apparatus;
initiate a purge operation based on a determination that the negative pressure of the removable fluid canister is above a predefined purge trigger pressure; and
operate the pneumatic pump and the valve during the purge operation to deliver a volume of air from the ambient environment through the wound dressing apparatus that is approximately equal to or greater than the volume of instillation fluid to purge a second portion of the instillation fluid from the wound dressing apparatus.