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US 2018/0140467 A1Published application
Heat-assisted pumping systems for use in negative pressure wound therapy
AssigneeSmith & Nephew, Inc.
InventorAllan Kenneth Frazer Grugeon Hunt
Life of this patent
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Abstract
A device and method for treating a wound of a patient with negative pressure is provided. The device comprises a heat-assisted pump system. The pump system can be powered in part by heat derived from the patient. The pump system may be configured to be highly planar, light weight, and portable. The pump system may comprise a Stirling engine or a thermal acoustic engine.
Claims11
A negative pressure wound therapy system, comprising:
- a wound dressing configured to form a seal over a wound site of a patient;
- a vacuum line fluidically connected to a space disposed between the wound dressing and the wound;
- and
- a pump system fluidically connected to the vacuum line, the pump system further comprising:
- a housing;
- a hot heat exchanger configured to receive heat from a heat source thermally connected to the hot heat exchanger;
- a working fluid thermally coupled to the hot heat exchanger;
- and
- a moveable member in contact with the working fluid, the moveable member configured to move when the working fluid expands to thereby generate a negative pressure in the vacuum line to draw a fluid from the wound site.
6 more elements
A pump system for use in negative pressure wound therapy, the pump system comprising:
- a pivoting substrate disposed between a top substrate and a bottom substrate;
- a first chamber disposed between the pivoting substrate and the bottom substrate;
- a second chamber disposed between the pivoting substrate and the top substrate, the second chamber being fluidically connected to the first chamber on top substrate;
- and
- a bellows disposed between the pivoting substrate and the bottom substrate, the bellows having a directional valve.
2 more elements
A pump system for use in negative pressure wound therapy, the pump system comprising:
- a hollow body enclosing a working fluid, the hollow body having a proximal end and a distal end;
- a diaphragm interposed between the proximal and distal ends of the hollow body;
- an antechamber coupled to the proximal end of the hollow body, wherein at least a portion of a wall of the antechamber is defined by the diaphragm;
- and
- an inlet directional valve having an open state and a closed state, the inlet directional valve being in the open state when a fluid flows into the antechamber and being in the closed state when the fluid flows out of the antechamber,
- wherein heat supplied to the working fluid generates a sound wave within the working fluid, said sound wave causing the diaphragm to move.
3 more elements
Dependencies are inferred from the claim text.