Multi-function dressing structure for negative-pressure therapy
View Patent ↗Systems, methods, and apparatuses for forming a multi-function core for a dressing are described. The multi-function core includes a contact layer configured to be positioned adjacent to a tissue site, a wicking layer adjacent to the contact layer, an ion exchange layer adjacent to the wicking layer, an absorbing layer adjacent to the ion exchange layer, a blocking layer adjacent to the absorbing layer, and an odor-absorbing layer adjacent to the blocking layer. The contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer are coextensive and formed from a plurality of fibers disposed in a fibrous web. Methods of manufacturing the multi-function core are also described.
1. A multi-function core for a dressing, the multi-function core comprising:
a contact layer configured to be positioned adjacent to a tissue site;
a wicking layer adjacent to the contact layer;
an ion exchange layer adjacent to the wicking layer;
an absorbing layer adjacent to the ion exchange layer;
a blocking layer adjacent to the absorbing layer; and
an odor-absorbing layer adjacent to the blocking layer;
wherein each of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer are formed from a plurality of fibers disposed in a fibrous web; and
wherein the plurality of fibers of one or more of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer comprise dual-layer fibers formed from two materials.
2. The multi-function core of claim 1 , wherein one or more of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer are coextensive.
3. The multi-function core of claim 1 , further comprising a rigid layer.
4. The multi-function core of claim 3 , wherein the rigid layer is coupled adjacent to the contact layer on a side of the contact layer that is opposite the wicking layer.
5. The multi-function core of claim 3 , wherein the rigid layer is adjacent to the odor absorbing layer.
6. The multi-function core of claim 1 , wherein the plurality of fibers of one or more of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer comprise single-layer fibers formed from a single material.
7. The multi-function core of claim 1 , wherein the plurality of fibers of one or more of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer comprise single-layer fibers formed from a single material and dual-layer fibers formed from two materials.
8. The multi-function core of claim 1 , wherein the dual-layer fibers comprise an inner core formed from a first material and an outer sheathing formed from a second material.
9. The multi-function core of claim 1 , wherein the contact layer, the wicking layer, the ion exchange layer, and the absorbing layer each comprise a plurality of dual-layer fibers, each dual-layer fiber having an inner core formed from a first material and an outer sheathing formed from a second material.
10. The multi-function core of claim 9 , wherein the first material of the dual-layer fibers of the contact layer comprises a hydrophobic polyurethane and the second material of the dual-layer fibers of the contact layer comprises a hydrophilic polyurethane.
11. The multi-function core of claim 10 , wherein the hydrophilic polyurethane comprises a silicone gel.
12. The multi-function core of claim 9 , wherein the first material of the dual-layer fibers of the contact layer comprises an antimicrobial.
13. The multi-function core of claim 9 , wherein the second material of the dual-layer fibers of the contact layer comprises an antimicrobial.
14. The multi-function core of claim 12 , wherein the antimicrobial is selected from a group consisting of silver and iodine.
15. The multi-function core of claim 9 , wherein the first material of the dual-layer fibers of the wicking layer comprises a hydrophobic polyurethane and the second material of the dual-layer fibers of the wicking layer comprises a hydrophilic polyurethane.
16. The multi-function core of claim 9 , wherein the first material of the dual-layer fibers of the ion exchange layer comprises a hydrophobic polymer and the second material of the dual-layer fibers of the ion exchange layer comprises a hydrophilic polymer having ion exchange resins disposed therein.
17. The multi-function core of claim 9 , wherein the first material of the dual-layer fibers of the absorbing layer comprises a superabsorbent polymer and the second material of the dual-layer fibers of the absorbing layer comprises a hydrophilic polymer.
18. The multi-function core of claim 17 , wherein the superabsorbent polymer is selected from a group consisting of: polyacrylates, polyacrylics, and carboxymethyl cellulose.
19. The multi-function core of claim 1 , wherein the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer each comprise a plurality of single-layer fibers.
20. The multi-function core of claim 19 , wherein the single-layer fibers of the wicking layer are formed from a hydrophilic polymer.
21. The multi-function core of claim 20 , wherein the hydrophilic polymer is selected from a group consisting of polyurethane, polyester, and acrylic.
22. The multi-function core of claim 19 , wherein the single-layer fibers of the ion exchange layer are formed from a hydrophilic polyurethane having activated carbon particles disposed therein.
23. The multi-function core of claim 19 , wherein the single-layer fibers of the absorbing layer are formed from an elastic polymer having superabsorbent polymer disposed therein.
24. The multi-function core of claim 23 , wherein the elastic polymer comprises elastane.
25. The multi-function core of claim 23 , wherein the superabsorbent polymer comprises superabsorbent fibers.
26. The multi-function core of claim 23 , wherein the superabsorbent polymer comprises superabsorbent particles.
27. The multi-function core of claim 19 , wherein the single-layer fibers of the blocking layer are formed from a hydrophobic polymer disposed in an open non-woven fibrous web.
28. The multi-function core of claim 27 , wherein the hydrophobic polymer comprises a fluorocarbon.
29. The multi-function core of claim 19 , wherein the single-layer fibers of the odor-absorbing layer are formed from a gas permeable polymer having activated carbon particles disposed in an open non-woven fibrous web.
30. The multi-function core of claim 29 , wherein the gas permeable polymer is selected from a group consisting of polyurethane and silicone.
31. The multi-function core of claim 1 , wherein the fibrous web of at least one of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer comprises a non-woven.
32. The multi-function core of claim 1 , wherein the fibrous web of at least one of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer comprises a woven.
33. The multi-function core of claim 1 , wherein one or more of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer are configured to permit the flow of negative pressure.
34. A multi-function core for a dressing, the multi-function core comprising:
a contact layer configured to be positioned adjacent to a tissue site;
a wicking layer adjacent to the contact layer;
an ion exchange layer adjacent to the wicking layer;
an absorbing layer adjacent to the ion exchange layer;
a blocking layer adjacent to the absorbing layer; and
an odor-absorbing layer adjacent to the blocking layer;
wherein each of the contact layer, the wicking layer, the ion exchange layer, the absorbing layer, the blocking layer, and the odor-absorbing layer are formed from a plurality of fibers disposed in a fibrous web; and
wherein the contact layer, the wicking layer, the ion exchange layer, and the absorbing layer each comprise a plurality of dual-layer fibers, each dual-layer fiber having an inner core formed from a first material and an outer sheathing formed from a second material.