US 11,925,746 B2
Negative pressure wound therapy system with dynamic fluid delivery
Christopher Brian Locke, Bournemouth (GB); and Benjamin Andrew Pratt, Poole (GB)
Assigned to 3M Innovative Properties Company, Saint Paul, MN (US)
Appl. No. 17/602,541
Filed by KCI Licensing, Inc., San Antonio, TX (US)
PCT Filed May 5, 2020, PCT No. PCT/US2020/031418
§ 371(c)(1), (2) Date Oct. 8, 2021,
PCT Pub. No. WO2020/227258, PCT Pub. Date Nov. 12, 2020.
Claims priority of provisional application 62/844,291, filed on May 7, 2019.
Prior Publication US 2022/0168494 A1, Jun. 2, 2022
Int. Cl. A61M 1/00 (2006.01)
CPC A61M 1/912 (2021.05) [A61M 1/92 (2021.05); A61M 1/96 (2021.05); A61M 1/985 (2021.05); A61M 2205/3334 (2013.01); A61M 2205/3379 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy (NPWT) system comprising:
an instillation system configured to provide instillation fluid to a wound site, wherein the wound site comprises a wound and a wound dressing;
a controller configured to:
provide a first quantity of instillation fluid for a first instillation cycle;
determine a second quantity of instillation fluid for a second instillation cycle based on the first quantity and a reduction factor, wherein the second quantity of instillation fluid is less than the first quantity of instillation fluid; and
adjust an operation of the instillation system to provide the second quantity of instillation fluid to the wound site,
wherein the reduction factor is determined based on a negative pressure of a negative pressure cycle and a time duration of the negative pressure cycle.