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US 11,752,252 B2Granted
Electro-mechanical pump for negative-pressure treatment
AssigneeKCI Licensing, Inc.
InventorsLarry Tab Randolph, Richard Marvin Kazala, Jr.
Life of this patent
Estimating the term…
Abstract
An apparatus for negative-pressure treatment may include an enclosure having a variable volume, a port and an actuation surface, a first one-way valve configured to allow fluid ingress to the enclosure, a second one-way valve configured to allow fluid egress from the enclosure, and an actuator configured to apply a linear force to the actuation surface.
Claims30
An apparatus for negative-pressure treatment, the apparatus comprising:
- an enclosure having a variable volume, a port and an actuation surface;
- a first one-way valve coupled to the port and configured to allow fluid ingress to the enclosure through the port;
- a second one-way valve coupled to the port and configured to allow fluid egress from the enclosure through the port;
- and
- an actuator configured to apply a linear force to the actuation surface, the actuator comprising a linearly driven shaft and contact surface;
- wherein the variable volume is configured to expand to generate a negative pressure in a range of about 115 mmHg to about 135 mmHg in response to the linear force being removed from the actuation surface.
3 more elements
An apparatus for negative-pressure treatment, the apparatus comprising:
- a dressing;
- an enclosure having a variable volume and a port;
- a container fluidly coupled to the dressing through the enclosure;
- a first one-way valve coupled to the port and configured to allow fluid ingress to the enclosure from the dressing through the port;
- a second one-way valve coupled to the port and configured to allow fluid egress from the enclosure to the container through the port;
- and
- an actuator comprising a shaft and contact surface, the shaft and contact surface configured to be driven linearly to apply a linear force to the enclosure;
- wherein the variable volume is configured expand to generate a negative pressure in a range of about 115 mmHg to about 135 mmHg in response to the linear force being removed from the enclosure.
5 more elements
A method of providing negative-pressure treatment to a tissue site, the method comprising:
- placing a tissue interface proximate to the tissue site;
- placing a cover over the tissue interface;
- sealing the cover to an attachment surface peripheral to the tissue site;
- fluidly coupling the tissue interface to an enclosure having a variable volume through a port;
- fluidly coupling a container to the tissue interface through the enclosure via the port;
- detachably coupling the enclosure to an actuator, the actuator comprising a shaft and contact surface;
- extending the shaft and contact surface of the actuator linearly to apply a linear force on the enclosure to compress the variable volume and expel fluid from the enclosure through the port;
- and
- retracting the shaft and contact surface of the actuator linearly to remove the linear force from the enclosure to allow the variable volume to expand and draw fluid from the tissue site into the enclosure via the port;
- wherein the expansion of the variable volume generates negative pressure in a range of about 115 mmHg to about 135 mmHg.
7 more elements
Dependencies are inferred from the claim text.