US 12,005,182 B2
Systems and methods for extending operational time of negative pressure wound treatment apparatuses
Ben Alan Askem, Leeds (GB); John Philip Gowans, Hessle (GB); William Kelbie, Inverness (GB); Damyn Musgrave, Cottenham (GB); Roberto Damiao Da Costa Rodrigues, Hull (GB); and Daniel Lee Steward, Kington upon Hull (GB)
Assigned to T.J.Smith and Nephew, Limited, Hull (GB)
Appl. No. 17/613,456
Filed by T.J.Smith and Nephew, Limited, Hull (GB)
PCT Filed May 26, 2020, PCT No. PCT/EP2020/064601
§ 371(c)(1), (2) Date Nov. 22, 2021,
PCT Pub. No. WO2020/239781, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 1907716 (GB), filed on May 31, 2019.
Prior Publication US 2022/0211933 A1, Jul. 7, 2022
Int. Cl. A61M 1/00 (2006.01); A61F 13/05 (2024.01)
CPC A61M 1/962 (2021.05) [A61F 13/05 (2024.01); A61M 2205/16 (2013.01); A61M 2205/3344 (2013.01); A61M 2205/82 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A negative pressure wound therapy system comprising:
a wound dressing configured to be placed over a wound of a patient, the wound dressing configured to absorb fluid;
a source of negative pressure disposed on or within the wound dressing, the source of negative pressure configured to aspirate fluid from the wound;
a power source disposed on or within the wound dressing; and
electronic circuitry disposed on or within the wound dressing, the electronic circuitry comprising:
a boost converter circuitry configured to receive power at a first power level from the power source and output power at a second power level to the source of negative pressure to cause the source of negative pressure to aspirate fluid from the wound at a first negative pressure level, the second power level being higher than the first power level; and
a controller configured to:
monitor capacity of the power source; and
in response to a determination that the capacity of the power source is depleting, provide a first control signal to cause the boost converter circuitry to output power to the source of negative pressure at a third power level lower than the second power level and cause the source of negative pressure to aspirate fluid from the wound at a second negative pressure level that is more positive than the first negative pressure level, the second negative pressure level being below atmospheric pressure.