EP0265906A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wound dressing
Assignee: Zeon Corp
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Filing: 1987-10-27
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Granted: —
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Expires: 2007-10-27
Abstract
Abstract A wound dressing comprising a porous layer having a good affinity to tissues of organisms comprising (a) a first portion (3) to be on the wound surface (2) having pores with a diameter of 20 to 500µm and a thickness of 1 to 10 mm, and (b) a second portion (5) to be remote to the wound surface (2) having pores with a diameter of not more than 20µm and a thickness of 0.5 to 5µm. Preferably the wound dressing contains in the first portion (3) an antimicrobial agent in an amount of not more than 50% by weight, and in the second portion an antimicrobial agent in an amount of 10 to 80% by weight.
Inventors
- 👤 Nobuyuki Shioya
- 👤 Yoshimitsu Kuroyanagi
- 👤 Yasumi Koganeo
- 👤 Ryuichiro Yoda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:43
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61F; A61F13/00; A61F13/00051; A61F13/00063; A61L15/425; A61F13/15; A61F13/84; A61F13/8405; A61F2013/00089; A61F2013/00157; A61F2013/00217; A61F2013/00221; A61F2013/00246; A61F2013/00255; A61F2013/00361; A61F2013/00365; A61F2013/00463; A61F2013/00519; A61F2013/00855; A61F2013/00863; A61F2013/00902; A61F2013/0091; A61F13/53; A61F2013/530802; A61F2013/53081; A61L2300/00; A61L2300/40; A61L2300/404
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
A wound dressing comprising a porous layer having a good affinity to tissues of organisms comprising (a) a first portion (3) to be on the wound surface (2) having pores with a diameter of 20 to 500 µm and a thickness of 1 to 10mm, and (b) a second portion (5) to be remote to the wound surface (2) having pores with a diameter of not more than 20µm and a thickness of 0.5 to 5µm.
Claim 2
Dependent Claim
76 words
A wound dressing comprising a porous layer having a good affinity to tissues of organisms comprising (a) a first portion (3) to be on the wound surface (2) having pores with a diameter of 20 to 500 µm and a thickness of 1 to 10mm, and (b) a second portion (5) to be remote to the wound surface (2) having pores with a diameter of not more than 20µm and a thickness of 0.5 to 5µm.
Claim 3
Dependent Claim
18 words
The wound dressing as claimed in claim 1 wherein said porous layer is made from a polyamino acid.
Claim 4
Dependent Claim
22 words
The wound dressing as claimed in claim 1 wherein said first portion (3) of said porous layer is made of a sponge.
Claim 5
Dependent Claim
33 words
The wound dressing as claimed in claim 1 wherein in said first portion (3) the pores have decreasing diameters from the surface to be on the wound surface (2) towards the outermost surface.
Claim 6
Dependent Claim
18 words
The wound dressing as claimed in claim 1 wherein said porous layer has a reinforcing material embedded therein.
Claim 7
Dependent Claim
14 words
The wound dressing as claimed in claim 5 wherein said reinforcing material is flexible.
Claim 8
Dependent Claim
38 words
The wound dressing claimed in claim 1 or 5 wherein at least the surface of said porous layer to be on the wound surface is coated or impregnated with a substance having an affinity to tissues of organisms.
Claim 9
Dependent Claim
105 words
A wound dressing comprising a porous layer having a good affinity to tissues of organisms comprising (a) a first portion (3) to be on the wound surface (2) having pores with a diameter of 20 to 500µm and a thickness of 1 to 10 mm, and containing an antimicrobial agent in an amount of not more than 50% by weight, and (b) a second portion (5) to be remote to the wound surface (2) having pores with a diameter of not more than 20µm and a thickness of 0.5 to 5µm and containing an antimicrobial agent in an amount of 10 to 80% by weight.
Claim 10
Dependent Claim
105 words
A wound dressing comprising a porous layer having a good affinity to tissues of organisms comprising (a) a first portion (3) to be on the wound surface (2) having pores with a diameter of 20 to 500µm and a thickness of 1 to 10 mm, and containing an antimicrobial agent in an amount of not more than 50% by weight, and (b) a second portion (5) to be remote to the wound surface (2) having pores with a diameter of not more than 20µm and a thickness of 0.5 to 5µm and containing an antimicrobial agent in an amount of 10 to 80% by weight.
Claim 11
Dependent Claim
18 words
The wound dressing as claimed in claim 8 wherein said porous layer has a reinforcing material embedded therein.
Claim 12
Dependent Claim
20 words
The wound dressing as claimed in claims 8 or 9 wherein said porous layer is made from a polyamino acid.
Claim 13
Dependent Claim
24 words
The wound dressing as claimed in claims 8 or 9 wherein the first portion (3) of said porous layer is made of a sponge.
Claim 14
Dependent Claim
37 words
The wound dressing as claimed in claims 8 or 9 wherein the pores have decreasing diameters from the surface to be on the wound surface (2) to the surface to be remote to the wound surface (2).
Claim 15
Dependent Claim
14 words
The wound dressing as claimed in claim 9 wherein said reinforcing material is flexible.
Claim 16
Dependent Claim
40 words
The wound dressing as claimed in claims 8 or 9 wherein at least the surface of said porous layer to be on the wound surface (2) is coated or impregnated with a substance having an affinity to tissues or organisms.
Claim 17
Dependent Claim
25 words
The wound dressing as claimed in claims 8 or 9 wherein said antimicrobial agent is contained therein in combination with at least one therapeutic agent.
References Cited (Backward Citations)
No citation records indexed.
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