US5154706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wound dressing for deep wounds
Assignee: Conmed Corp
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Filing: 1991-08-07
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Granted: 1992-10-13
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Expires: 2011-08-07
Abstract
Abstract A wound dressing (10) for a deep wound (W) is provided. The wound dressing (10) comprises a hydrogel layer (12) having an upper surface (16) and a lower surface (18). The hydrogel layer (12) is correspondingly sized to fill the cavity of the deep wound (W). The wound dressing (10) further comprises a dressing removal layer (14) disposed between the upper surface (16) and the lower surface (18) of the hydrogel layer (12). The dressing removal layer (14) extends outwardly from the hydrogel layer (12) so as to form a pull tab (20) which facilitates removal of the hydrogel layer (12) from the deep wound (W). A method of making a wound dressing (10) for a deep wound (W) is also provided.
Inventors
- 👤 James V. Cartmell
- 👤 Michael L. Wolf
- 👤 Michael J. Allaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/00051; A61F13/00085; A61F13/02; A61F13/0203; A61F13/0213; A61F13/06; A61F13/064; A61F13/069; A61F13/15; A61F13/20; A61F2013/00089; A61F2013/00217; A61F2013/00221; A61F2013/00225; A61F2013/00361; A61F2013/00365; A61F2013/00536; A61F2013/0054; A61F2013/00544; A61F2013/00574; A61F2013/00578; A61F2013/00604; A61F2013/00608; A61F2013/00621; A61F2013/00638; A61F2013/00655; A61F2013/00676; A61F2013/00727; A61F2013/00748; A61F2013/00795; A61F2013/00817; A61F2013/00897
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
116 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface, said hydrogel layer having a thickness in a range from about 1 cm to about 18 cm such that said lower surface of said hydrogel layer can extend into said deep open surgical wound such that said hydrogel layer a self-adheres to said deep open surgical wound; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layers from said deep open surgical wound.
Claim 2
Dependent Claim
116 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface, said hydrogel layer having a thickness in a range from about 1 cm to about 18 cm such that said lower surface of said hydrogel layer can extend into said deep open surgical wound such that said hydrogel layer a self-adheres to said deep open surgical wound; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layers from said deep open surgical wound.
Claim 3
Dependent Claim
31 words
A wound dressing as claimed in claim 1 wherein said dressing removal layer is made from a material selected from the group consisting of fabrics, fiber nettings, scrim and combinations thereof.
Claim 4
Dependent Claim
19 words
A wound dressing as claimed in claim 1 wherein said dressing removal layer is made from a textured polyester.
Claim 5
Dependent Claim
104 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface, said hydrogel layer having a thickness in a range from about 1 cm to about 18 cm such that said lower surface of said hydrogel layer can extend into said deep open surgical wound such that said hydrogel layer self-adheres to said deep open surgical wound; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer such that said hydrogel layer can be removed from said deep open surgical wound as substantially a single piece.
Claim 6
Dependent Claim
104 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface, said hydrogel layer having a thickness in a range from about 1 cm to about 18 cm such that said lower surface of said hydrogel layer can extend into said deep open surgical wound such that said hydrogel layer self-adheres to said deep open surgical wound; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer such that said hydrogel layer can be removed from said deep open surgical wound as substantially a single piece.
Claim 7
Dependent Claim
31 words
A wound dressing as claimed in claim 4 wherein said dressing removal layer is made from a material selected from the group consisting of fabrics, fiber nettings, scrim and combinations thereof.
Claim 8
Dependent Claim
149 words
A wound dressing product for a deep open surgical wound comprising: (a) a tray for forming and storing said wound dressing; (b) a hydrogel layer having an upper surface and a lower surface disposed in said tray, said hydrogel layer having a thickness in a range from about 1 cm to about 18 cm such that said lower surface of said hydrogel layer can extend into said deep open surgical wound such that said hydrogel layer is self-adhered to said deep open surgical wound; (c) a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layer from said deep open surgical wound; and (d) a protective cover layer over said tray for preventing contaminants from contacting said hydrogel layer.
Claim 9
Dependent Claim
149 words
A wound dressing product for a deep open surgical wound comprising: (a) a tray for forming and storing said wound dressing; (b) a hydrogel layer having an upper surface and a lower surface disposed in said tray, said hydrogel layer having a thickness in a range from about 1 cm to about 18 cm such that said lower surface of said hydrogel layer can extend into said deep open surgical wound such that said hydrogel layer is self-adhered to said deep open surgical wound; (c) a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layer from said deep open surgical wound; and (d) a protective cover layer over said tray for preventing contaminants from contacting said hydrogel layer.
Claim 10
Dependent Claim
68 words
A wound dressing product as claimed in claim 6 wherein said hydrogel layer is an aqueous mixture comprising: (a) from about 0% to about 90% by weight polyhydric alcohol; (b) from about 6% to about 60% by weight isophoronediisocyanate terminated prepolymer; (c) from about 4% to about 40% by weight polyethylene oxide based diamine; (d) up to about 2% by weight sodium chloride; and (e) the balance water.
Claim 11
Dependent Claim
32 words
A wound dressing product as claimed in claim 6 wherein said dressing removal layer is made from a material selected from the group consisting of fabrics, fiber nettings, scrim and combinations thereof.
Claim 12
Dependent Claim
141 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 0% to about 90% by weight polyhydric alcohol; (b) from about 6% to about 60% by weight isophoronediisocyanate terminated prepolymer; (c) from about 4% to about 40% by weight polyethylene oxide based diamine; (d) up to about 2% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layer from said deep open surgical wound.
Claim 13
Dependent Claim
141 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 0% to about 90% by weight polyhydric alcohol; (b) from about 6% to about 60% by weight isophoronediisocyanate terminated prepolymer; (c) from about 4% to about 40% by weight polyethylene oxide based diamine; (d) up to about 2% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layer from said deep open surgical wound.
Claim 14
Dependent Claim
25 words
A wound dressing as claimed in claim 9 wherein said polyhydric alcohol is selected from the group consisting of polypropylene glycol, polyethylene glycol and glycerine.
Claim 15
Dependent Claim
111 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 0% to about 90% by weight polyhydric alcohol; (b) from about 6% to about 60% by weight isophoronediisocyanate terminated prepolymer; (c) from about 4% to about 40% by weight polyethylene oxide based diamine; (d) up to about 2% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer.
Claim 16
Dependent Claim
111 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 0% to about 90% by weight polyhydric alcohol; (b) from about 6% to about 60% by weight isophoronediisocyanate terminated prepolymer; (c) from about 4% to about 40% by weight polyethylene oxide based diamine; (d) up to about 2% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer.
Claim 17
Dependent Claim
25 words
A wound dressing as claimed in claim 11 wherein said polyhydric alcohol is selected from the group consisting of polypropylene glycol, polyethylene glycol and glycerine.
Claim 18
Dependent Claim
141 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 15% to about 30% by weight polyhydric alcohol; (b) from about 8% to about 14% by weight isophoronediisocyanate terminated prepolymer; (c) from about 5% to about 10% by weight polyethylene oxide based diamine; (d) up to about 1% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layer from said deep open surgical wound.
Claim 19
Dependent Claim
141 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 15% to about 30% by weight polyhydric alcohol; (b) from about 8% to about 14% by weight isophoronediisocyanate terminated prepolymer; (c) from about 5% to about 10% by weight polyethylene oxide based diamine; (d) up to about 1% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer, said dressing removal layer extending outwardly from said hydrogel layer so as to form a pull tab which facilitates removal of said hydrogel layer from said deep open surgical wound.
Claim 20
Dependent Claim
111 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 15% to about 30% by weight polyhydric alcohol; (b) from about 8% to about 14% by weight isophoronediisocyanate terminated prepolymer; (c) from about 5% to about 10% by weight polyethylene oxide based diamine; (d) up to about 1% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer.
Claim 21
Dependent Claim
111 words
A wound dressing for a deep open surgical wound comprising: a hydrogel layer having an upper surface and a lower surface such that said hydrogel layer self-adheres to said deep open surgical wound, said hydrogel layer being formed from an aqueous mixture comprising (a) from about 15% to about 30% by weight polyhydric alcohol; (b) from about 8% to about 14% by weight isophoronediisocyanate terminated prepolymer; (c) from about 5% to about 10% by weight polyethylene oxide based diamine; (d) up to about 1% by weight sodium chloride; and (e) the balance water; and a dressing removal layer disposed between said upper surface and said lower surface of said hydrogel layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |