Reduced-pressure, composite manifolds
A reduced-pressure treatment system for treating a wound on a patient includes a composite manifold that may help prevent or minimize injury to a wound edge of the wound being treated with reduced pressure. The composite manifold includes a perimeter manifold member and an inboard manifold member. The perimeter manifold member is designed to not collapse substantially under reduced pressure in a therapy range. The perimeter manifold member may be more rigid with respect to compressibility than the inboard manifold member. A sealing member is used to form a fluid seal over the wound, and a reduced-pressure subsystem provides reduced pressure to the composite manifold. Other systems, methods, and dressings are presented.
1. A reduced-pressure treatment system comprising:
a composite manifold having:
a border manifold for disposing adjacent to a wound edge and having an interior portion and a first density, and
an inner manifold disposed adjacent to the interior portion of the border manifold, the inner manifold having a second density, the first density being greater than the second density;
a drape for covering the composite manifold to form a sealed space over the composite manifold; and
a reduced-pressure source for providing reduced pressure to the composite manifold.
2. The reduced-pressure treatment system of claim 1 , wherein the border manifold comprises a plurality of manifolds.
3. The reduced-pressure treatment system of claim 1 , wherein the border manifold is coupled to the inner manifold.
4. The reduced-pressure treatment system of claim 1 , wherein:
the border manifold has a first bulk modulus, K 1 ;
the inner manifold has a second bulk modulus, K 2 ; and
the first bulk modulus is greater than the second bulk modulus, K 1 >K 2 .
5. The reduced-pressure treatment system of claim 1 , wherein the border manifold is formed with adequate strength to resist collapse under a compressive force transmitted by the drape when under therapeutic reduced pressure.
6. The reduced-pressure treatment system of claim 1 , wherein the border manifold and the inner manifold comprise a same material.
7. The reduced-pressure treatment system of claim 1 , wherein the border manifold comprises a hydrophilic material and a bioactive material.
8. The reduced-pressure treatment system of claim 1 , wherein the border manifold comprises a hydrophilic material and a bioactive material, and wherein the bioactive material comprises epinephrine.
9. The reduced-pressure treatment system of claim 1 , wherein the border manifold comprises a bio-friendly stiffener.
10. The reduced-pressure treatment system of claim 1 , wherein the border manifold comprises at least one support element to cause the border manifold to be less compressible.
11. The reduced-pressure treatment system of claim 10 , wherein the at least one support element comprises at least one of a filament, a vertical post, or a strut.
12. The reduced-pressure treatment system of claim 1 , wherein inner manifold comprises a material having 65 pores per linear inch, and wherein the border manifold comprises a material having 115 pores per linear inch.
13. A composite manifold comprising:
a border manifold for disposing adjacent to a wound edge and having an interior portion and a first density, and
an inner manifold disposed adjacent to the interior portion of the border manifold, the inner manifold having a second density, the first density being greater than the second density.
14. The composite manifold of claim 13 , wherein the border manifold is coupled to the inner manifold.
15. The composite manifold of claim 13 , wherein:
the border manifold has a first bulk modulus, K 1 ;
the inner manifold has a second bulk modulus, K 2 ; and
the first bulk modulus is greater than the second bulk modulus, K 1 >K 2 .
16. The composite manifold of claim 13 , wherein the border manifold is formed with adequate strength to resist collapse under therapeutic reduced pressure.
17. The composite manifold of claim 13 , wherein the border manifold and the inner manifold comprise a same material.
18. The composite manifold of claim 13 , wherein the border manifold comprises a hydrophilic material and a bioactive material.
19. The composite manifold of claim 13 , wherein the border manifold comprises a hydrophilic material and a bioactive material, and wherein the bioactive material comprises epinephrine.
20. The composite manifold of claim 13 , wherein the border manifold comprises at least one support element to cause the border manifold to be less compressible.
21. The composite manifold of claim 20 , wherein the at least one support element comprises at least one of a filament, a vertical post, or a strut.
22. The composite manifold of claim 13 , wherein inner manifold comprises a material having 65 pores per linear inch, and wherein the border manifold comprises a material having 115 pores per linear inch.
23. A method of manufacturing a composite manifold comprising:
forming a border manifold for disposing proximate a wound edge, the border manifold having a first density; and
forming an inner manifold, the inner manifold having a second density, the first density being greater than the second density.
24. The method of claim 23 , further comprising coupling the border manifold to the inner manifold.
25. The method of claim 23 , wherein forming the border manifold and forming the inner manifold comprises:
forming the border manifold with a first bulk modulus, K 1 ; and
forming the inner manifold with a second bulk modulus, K 2 , wherein the first bulk modulus is greater than the second bulk modulus, K 1 >K 2 .
26. The method of claim 23 , wherein forming the border manifold comprises forming the border manifold from a hydrophilic material and applying a bioactive material to at least a portion of the hydrophilic material.
27. The method of claim 23 , wherein forming the border manifold comprises forming the border manifold from a hydrophilic material and applying a bioactive material to at least a portion of the hydrophilic material, and wherein the bioactive material comprises epinephrine.
28. The method of claim 23 , wherein the border manifold is formed with adequate strength to resist collapse under therapeutic reduced pressure.
29. The method of claim 23 , wherein the border manifold and the inner manifold comprise a same material.
30. The method of claim 23 , wherein the border manifold comprises at least one support element to cause the border manifold to be less compressible.
31. The method of claim 30 , wherein the at least one support element comprises at least one of a filament, a vertical post, or a strut.
32. The method of claim 23 , wherein inner manifold comprises a material having 65pores per linear inch, and wherein the border manifold comprises a material having 115 pores per linear inch.
33. A composite manifold comprising:
a border manifold for disposing proximate a wound edge, the border manifold sprayed with a stiffening substance; and
an inner manifold disposed adjacent to the border manifold, wherein the stiffening substance causes the border manifold to be more stiff than the inner manifold.
34. The composite manifold of claim 33 , wherein the border manifold is less compressible than the inner manifold.
35. The composite manifold of claim 33 , wherein the border manifold is coupled to the inner manifold.
36. The composite manifold of claim 33 , wherein:
the border manifold has a first bulk modulus, K 1 ;
the inner manifold has a second bulk modulus, K 2 ; and
the first bulk modulus is greater than the second bulk modulus, K 1 >K 2 .
37. The composite manifold of claim 33 , wherein the border manifold is formed with adequate strength to resist collapse under therapeutic reduced pressure.
38. The composite manifold of claim 33 , wherein the border manifold and the inner manifold comprise a same material.
39. The composite manifold of claim 33 , wherein the border manifold comprises a hydrophilic material and a bioactive material.
40. The composite manifold of claim 33 , wherein the border manifold comprises a hydrophilic material and a bioactive material, and wherein the bioactive material comprises epinephrine.
41. The composite manifold of claim 33 , wherein the stiffening substance causes the border manifold to be more stiff than the inner manifold while maintaining an ability of the border manifold to manifold fluids.
42. The composite manifold of claim 33 , wherein the border manifold comprises walls and a base made to cooperate with the inner manifold, and wherein the base comprises apertures to promote fluid communication through the base.
43. The composite manifold of claim 33 , wherein the border manifold comprises at least one support element to cause the border manifold to be less compressible.
44. The composite manifold of claim 43 , wherein the at least one support element comprises at least one of a filament, a vertical post, or a strut.
45. The composite manifold of claim 33 , wherein inner manifold comprises a material having 65 pores per linear inch, and wherein the border manifold comprises a material having 115 pores per linear inch.