Granted Patent B2

US 12,447,260 · App. 16/338,386 · Granted Oct 21, 2025

Inventors: Victoria Beadle (Hull, GB); Mark Hesketh (Royston, GB); William Kelbie (Iverness, GB); Damyn Musgrave (Cottenham, GB); Joseph William Robinson (Papworth Everard, GB); Daniel Steward (Hull, GB)

Assignee: Smith & Nephew PLC

A61M1/962A61F13/05A61M1/964A61F2013/8482A61F2013/8494A61M1/784A61M2205/50A61M2205/583A61M2205/587A61M2205/7518

Abstract

Claims (26)

1. A wound dressing apparatus comprising:

a wound contact layer configured to be positioned in contact with a wound;

a first area over the wound contact layer comprising:

a spacer layer; and

an absorbent layer over the spacer layer;

a second area over the wound contact layer comprising a cassette, the cassette comprising:

a negative pressure source surrounded by a casing, wherein the negative pressure source comprises a negative pressure source outlet and a negative pressure source inlet comprising an opening configured to communicate negative pressure to the first area;

an inlet protection mechanism is formed to fit around and surround the opening of the negative pressure source inlet and configured to prevent wound exudate from the wound dressing from passing through the opening of the negative pressure source inlet and to prevent wound exudate from entering the inlet of the negative pressure source;

wherein the casing is configured to allow fluid communication between the first area and second area;

wherein the casing comprises:

a first wound facing surface and an opposite second surface;

wherein the second surface comprises a vent aperture configured to align with the negative pressure source outlet and a user communication interface comprising a power button and a visual indicator for indicating a condition of the negative pressure source and/or a level of pressure within the wound dressing;

wherein the first surface comprises an opening for the inlet protection mechanism in fluid communication with the absorbent layer; and

wherein the first area is positioned adjacent to the second area; and

a cover layer configured to cover and form a seal over the wound contact layer, the first area, and the second area.

2. The wound dressing apparatus of claim 1 , wherein the casing further comprises electronic components, wherein the electronic components comprise one or more of a power source, a flexible circuit board, a sensor, a switch, and/or a light or LED indicator.

3. The wound dressing apparatus of claim 2 , wherein the light or LED indicator are configured to be visible on the second surface of the casing for indicating a condition of the negative pressure source.

4. The wound dressing apparatus of claim 3 , wherein the visual indicator comprise a hole in the casing configured to align with the light or LED indicator of the electronic components.

5. The wound dressing apparatus of claim 3 , wherein the visual indicator comprise a transparent material in the casing positioned over at least a portion of the light or LED indicator of the electronic components.

6. The wound dressing apparatus of claim 2 , wherein the casing comprises a material on the second surface of the casing configured to cover at least a portion of the switch.

7. The wound dressing apparatus of claim 1 , further comprising an exhaust mechanism configured to be positioned at the negative pressure source outlet, the exhaust mechanism comprising an antibacterial membrane and/or a non-return valve.

8. The wound dressing apparatus of claim 7 , wherein the cover layer comprises an aperture over the exhaust mechanism.

9. The wound dressing apparatus of claim 1 , wherein the negative pressure source inlet protection mechanism comprises a hydrophobic material configured to prevent fluid from entering the negative pressure source.

10. The wound dressing apparatus of claim 1 , wherein the cassette comprises one or more slits, grooves or recesses in the casing, wherein the one or more slits, grooves or recesses are configured to provide one or more hinge points in the casing and increase flexibility of the cassette.

11. The wound dressing apparatus of claim 1 , wherein the spacer layer extends within both the first area and the second area and the cassette is provided over the spacer layer.

12. The wound dressing apparatus of claim 1 , wherein the negative pressure source is encapsulated in a hydrophobic coating.

Assignments (5)

Continuity (4)

References Cited (386)