IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0657486
(2000-09-08)
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발명자
/ 주소 |
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| 출원인 / 주소 |
- 3M Innovative Properties Company
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| 인용정보 |
피인용 횟수 :
39 인용 특허 :
42 |
초록
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A multi-layer wound dressing comprising at least two absorbent layers, and materials for forming absorbent layers are provided. The absorbent layers have different absorbencies, with the layer closest to the wound having a lower absorbency than the layer furthest from the wound. The wound dressing t
A multi-layer wound dressing comprising at least two absorbent layers, and materials for forming absorbent layers are provided. The absorbent layers have different absorbencies, with the layer closest to the wound having a lower absorbency than the layer furthest from the wound. The wound dressing typically contains additional non-absorbing layers, such as a backing film and wound-facing film. The dressing provides absorbency of wound exudates while preventing the absorbent material from entering the wound. In specific implementations the dressing is substantially transparent prior to application to a wound, as well as after application to the wound when body fluids have been absorbed.
대표청구항
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1. A multi-layer wound dressing comprising:a first absorbent layer with an absorbency greater than 300 percent and containing the reaction product of a hydrophilic, ethylenically unsaturated monomer; and a second absorbent non-disintegrating layer in contact with the first absorbent layer and less a
1. A multi-layer wound dressing comprising:a first absorbent layer with an absorbency greater than 300 percent and containing the reaction product of a hydrophilic, ethylenically unsaturated monomer; and a second absorbent non-disintegrating layer in contact with the first absorbent layer and less absorbent of body fluids than the first absorbent layer; wherein the wound dressing is configured to be positioned on a patient's wound such that the second absorbent layer is between the first absorbent layer and the wound; and wherein the second absorbent aye is substantially insoluble in water. 2. The multi-layer wound dressing of claim 1, wherein the first absorbent layer comprises less than 10 percent by weight water prior to application to a patient.3. The multi-layer wound dressing of claim 1, wherein the first absorbent layer is substantially insoluble in water.4. The multi-layer wound dressing of claim 1, wherein the first absorbent layer comprises the reaction product of the hydrophilic, ethylenically unsaturated monomer; an acrylic acid ester of a non-tertiary alcohol having 4 to 14 carbon atoms; and a polar, ethylenically unsaturated monomer.5. The multi-layer wound dressing of claim 4, wherein the non-tertiary alcohol has from 6 to 12 carbon atoms.6. The multi-layer wound dressing of claim 4, wherein the first absorbent layer comprises the reaction product of about 30 to 100 parts by weight of the hydrophilic, ethylenically unsaturated monomer; about 0 to 30 parts by weight of the acrylic acid ester of a non-tertiary alcohol having from 4 to 14 carbon atoms; and about 0 to 40 parts by weight of the polar, ethylenically unsaturated monomer.7. The multi-layer wound dressing of claim 4, wherein the first absorbent layer comprises the reaction product of about 50 to 80 parts by weight of the hydrophilic, ethylenically unsaturated monomer, about 5 to 30 parts by weight of the acrylic acid ester of a non-tertiary alcohol having from 4 to 14 carbon atoms; and about 10 to 30 parts by weight of the polar, ethylenically unsaturated monomer.8. The multi-layer wound dressing of claim 4, wherein the polar, ethylenically unsaturated monomer comprises N-vinyl acetamide.9. The multi-layer wound dressing of claim 4, wherein the polar, ethylenically unsaturated monomer comprises partially neutralized acrylic acid.10. The multi-layer wound dressing of claim 1, wherein the second absorbent layer comprises the reaction product of an acrylic acid ester of a non-tertiary alcohol having from 4 to 14 carbon atoms; a hydrophilic, ethylenically unsaturated monomer; and a polar, ethylenically unsaturated monomer.11. The multi-layer wound dressing of claim 10, wherein the second absorbent layer comprises the reaction product of about 45 to 80 parts by weight of the acrylic acid ester of a non-tertiary alcohol having from 4 to 14 carbon atoms; about 25 to 40 parts by weight of the hydrophilic, ethylenically unsaturated monomer; and about 2 to 20 parts by weight of the polar, ethylenically unsaturated monomer.12. The multi-layer wound dressing of claim 1, wherein the first absorbent layer has an absorbency at least 100 percent greater than the absorbency of the second absorbent layer.13. The multi-layer wound dressing of claim 1, wherein the second absorbent layer has an absorbency of at least about 50 percent.14. The multi-layer wound dressing of claim 13, wherein the second absorbent layer has an absorbency of at least 80 percent.15. The multi-layer wound dressing of claim 1, wherein the dressing is substantially transparent.16. The multi-layer dressing of claim 1, wherein the dressing is curable.17. The multi-layer wound dressing of claim 1, further comprising a wound-facing layer.18. The multi-layer wound dressing of claim 17, wherein the wound-facing layer is perforated.19. The multi-layer wound dressing of claim 1, wherein the second absorbent layer is adhesive.20. A multi-layer wound dressing comprising:a first absorbent layer having an absorbency of greater than 300 percent and containing less than 10 percent by weight water before application to a patient; and a second absorbent layer having an absorbency of less than 50 percent of the absorbency of the first absorbent layer; wherein the wound dressing is configured to be positioned on a patient such that the second absorbent layer is between the first absorbent layer and the wound; and wherein the second absorbent layer is substantially insoluble in water. 21. The multi-layer wound dressing of claim 20, wherein the absorbency of the second absorbent layer is at least 50 percent.22. The multi-layer wound dressing of claim 20, wherein the second absorbent layer is adhesive.23. The multi-layer wound dressing of claim 20, wherein the wound dressing is transparent.24. The multi-layer wound dressing of claim 20, wherein the first absorbent layer has an absorbency of at least 400 percent.25. The multi-layer wound dressing of claim 20, further comprising an apertured wound-facing layer with a first side in contact with the second absorbent layer and a second side containing an apertured wound-facing adhesive layer.26. The multi-layer wound dressing of claim 20, further comprising a backing.27. The multi-layer wound dressing of claim 20, wherein the dressing is cutable.28. The multi-layer wound dressing of claim 20, wherein the first absorbent layer is from 10 to 50 mils thick.29. The multi-layer wound dressing of claim 20, wherein the second absorbent layer is from 2 to 4 mils thick.30. The multi-layer wound dressing of claim 20, wherein the first absorbent layer is from 2 to 15 times as thick as the second absorbent layer.31. The multi-layer wound dressing of claim 20, wherein the first absorbent layer comprises the reaction product of about 5 to 30 parts by weight of an acrylic acid ester of a non-tertiary alcohol having from 4 to 14 carbon atoms; about 50 to 80 parts by weight of a hydrophobic, ethylenically unsaturated monomer; and about 10 to 30 parts by weight of a polar, ethylenically unsaturated monomer.32. The multi-layer wound dressing of claim 20, further comprising a wound-facing film having apertures having a total void area between 1 and 20 percent.33. The multi-layer wound dressing of claim 32, wherein the wound-facing film has a void area between 4 and 10 percent.34. The multi-layer wound dressing of claim 32, wherein the apertures have an average diameter less than the combined thickness of the first and second absorbent layers.
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