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US 11,071,653 B2Granted
Heat-assisted pumping systems for use in negative pressure wound therapy
AssigneeSmith & Nephew, Inc.
InventorAllan Kenneth Frazer Grugeon Hunt
Life of this patent
Estimating the term…
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.
Claims14
A negative pressure wound therapy system, comprising:
- a wound dressing configured to form a seal over a wound of a patient;
- a vacuum line configured to be fluidically connected to a space disposed between the wound dressing and the wound;
- and
- a pump system configured to be fluidically connected to the vacuum pump system 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;
- wherein at least a portion of the heat received by the hot heat exchanger comes from the patient.
7 more elements
A negative pressure wound therapy system, comprising:
- a wound dressing configured to form a seal over a wound of a patient;
- a vacuum line configured to be fluidically connected to a space disposed between the wound dressing and the wound;
- a mesh;
- and
- a pump system configured to be fluidically connected to the vacuum line, the pump system 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;
- wherein the mesh is secured to the housing and thermally coupled to at least a portion of the working fluid.
8 more elements
Dependencies are inferred from the claim text.