Fluid bridge for simultaneous application of negative pressure to multiple tissue sites
Disclosed embodiments may relate to devices, systems, and methods for providing negative-pressure therapy simultaneously to a plurality of tissue sites using a single negative-pressure source. For example, a fluid bridge may comprise a plurality of distal ends, each configured to interact fluidly with a tissue site. In some embodiments, each distal end may have an aperture. The bridge may also comprise a port for entry of negative pressure into the enclosed space of the bridge. In some embodiments, each distal end may comprise a one-way valve. The enclosed space of the fluid pathway between the distal ends and the port may be supported in some embodiments, to prevent collapse due to negative pressure and/or compression.
1. An apparatus for delivering negative pressure to a plurality of tissue sites, comprising:
an envelope comprising a first surface and a second surface, the envelope being liquid impermeable; and
a support layer disposed between the first surface and the second surface to form a fluid pathway, the support layer being liquid impermeable and the fluid pathway comprising:
a central portion having a port in the envelope; and
a plurality of distal ends in fluid communication with the central portion, each of the plurality of distal ends having an aperture in the envelope.
2. The apparatus of claim 1 , wherein:
the port is located on the first surface; and
the aperture of each of the plurality of distal ends is located on the second surface.
3. The apparatus of claim 2 , further comprising at least one one-way valve located between the port and the aperture of one of the plurality of distal ends and configured to allow fluid flow from the aperture toward the port.
4. The apparatus of claim 2 , wherein each of the plurality of distal ends comprises a one-way valve in proximity to the aperture and configured to allow fluid flow from the aperture towards the port.
5. The apparatus of claim 4 , wherein the support layer comprises a thermoformed support structure.
6. The apparatus of claim 4 , wherein the support layer comprises a plurality of supports configured to support the envelope.
7. The apparatus of claim 6 , wherein the plurality of supports are substantially co-extensive with the fluid pathway.
8. The apparatus of claim 6 , wherein each of the plurality of supports comprises a hollow standoff which is sealed to maintain an internal pressure.
9. The apparatus of claim 6 , wherein:
the envelope further comprises a first layer and a second layer;
the first layer comprises the first surface of the envelope, and the second layer comprises the second surface of the envelope;
the first layer and the second layer are coupled to enclose the fluid pathway between the first layer and the second layer; and
the plurality of supports are located between the first layer and the second layer.
10. The apparatus of claim 6 , wherein the support layer comprises a spacer layer, and the plurality of supports extend from an inner surface of the spacer layer.
11. The apparatus of claim 6 , wherein:
the plurality of supports comprises a first plurality of supports and a second plurality of supports; and
the first plurality of supports are in stacked relationship with the second plurality of supports.
12. The apparatus of claim 6 , wherein:
the support layer further comprises a first spacer layer and a second spacer layer; and
the plurality of supports comprises a first plurality of supports extending inward from the first spacer layer and a second plurality of supports extending inward from the second spacer layer.
13. The apparatus of claim 12 , wherein the fluid pathway further comprises a recessed space in each of the plurality of distal ends in fluid communication with the aperture, and each recessed space is formed by an opening in the second spacer layer.
14. The apparatus of claim 13 , wherein the fluid pathway further comprises a port recessed space in fluid communication with the port, and the port recessed space is formed by an opening in the first spacer layer.
15. The apparatus of claim 14 , wherein the one-way valve of each of the plurality of distal ends is integral to the second spacer layer.
16. The apparatus of claim 4 , wherein the support layer comprises a foam delivery manifold.
17. The apparatus of claim 1 , wherein the enclosed fluid pathway comprises a primary fluid pathway having two distal ends of the plurality of distal ends.
18. The apparatus of claim 17 , wherein the enclosed fluid pathway further comprises one or more branch fluid pathways, each having one distal end of the plurality of distal ends and a proximal end in fluid communication with the primary fluid pathway.
19. The apparatus of claim 4 , further comprising a plurality of release liners, wherein one of the plurality of release liners removably covers each aperture.
20. The apparatus of claim 19 , wherein each of the plurality of release liners removably seals one of the apertures.
21. The apparatus of claim 20 , wherein each of the plurality of distal ends further comprises adhesive located in proximity to the aperture.
22. The apparatus of claim 4 , further comprising a regulator positioned between each of the plurality of distal ends and the central portion, wherein the regulator is configured to step-down pressure.
23. The apparatus of claim 4 , wherein the envelope comprises a perforation forming a calibrated flow of less than about 5 cc/min located in proximity to each of the plurality of distal ends.
24. The apparatus of claim 23 , wherein the envelope further comprises a bacterial filter over each calibrated flow.