Wound dressing with dehydrated hydrogel gauze
First Claim
1. A wound dressing comprising:
- a first flexible absorbent layer capable of absorbing wound exudate emitted by a wound on a patient, said first absorbent layer being perforated to facilitate the passage of wound exudate emitted by said wound which is not absorbable by said first absorbent layer;
a dehydrated hydrogel material which is devoid of water, said dehydrated hydrogel material being impregnated in said first absorbent layer such that said dehydrated hydrogel material is substantially exposed at the outer surface of said wound dressing to preclude said first absorbent layer from adhering to said wound and can absorb wound exudate upon contact with said wound; and
a second flexible absorbent layer mounted onto said first absorbent layer opposite said wound for absorbing wound exudate passed from said wound to said first absorbent layer.
4 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a wound dressing in the form of a gauze or similar absorbent material having dehydrated hydrogel material impregnated therein for absorbing wound exudate. The dehydrated hydrogel material is 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 aliphatic diisocyanate terminated prepolymer; (c) from about 4% to about 40% by weight polyethylene oxide based polyamine; (d) 0% to about 2% by weight sodium chloride; and (e) the balance water. The present wound dressing is capable of absorbing large amounts of wound exudate without inhibiting the healing of the wound to which it is contacted since it does not adhere or stick to the wound.
104 Citations
15 Claims
-
1. A wound dressing comprising:
-
a first flexible absorbent layer capable of absorbing wound exudate emitted by a wound on a patient, said first absorbent layer being perforated to facilitate the passage of wound exudate emitted by said wound which is not absorbable by said first absorbent layer; a dehydrated hydrogel material which is devoid of water, said dehydrated hydrogel material being impregnated in said first absorbent layer such that said dehydrated hydrogel material is substantially exposed at the outer surface of said wound dressing to preclude said first absorbent layer from adhering to said wound and can absorb wound exudate upon contact with said wound; and a second flexible absorbent layer mounted onto said first absorbent layer opposite said wound for absorbing wound exudate passed from said wound to said first absorbent layer. - View Dependent Claims (2, 3, 4, 7, 8, 9)
-
-
5. A wound dressing comprising:
-
a first flexible absorbent layer capable of absorbing wound exudate emitted by a wound on a patient, said first absorbent layer being perforated to facilitate the passage of wound exudate emitted by said wound which is not absorbable by said first absorbent layer; a dehydrated hydrogel material which is substantially devoid of water, said dehydrated hydrogel material being impregnated in said first absorbent layer such that said dehydrated hydrogel material is substantially exposed at the outer surface of said wound dressing to preclude said first absorbent layer from adhering to said wound and can absorb wound exudate upon contact with said wound, said dehydrated hydrogel 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 aliphatic diisocyanate terminated prepolymer; (c) from about 4% to about 40% by weight polyethylene oxide based polyamine; (d) 0% to about 2% by weight sodium chloride; and (e) the balance water; and a second flexible absorbent layer mounted onto said first absorbent layer opposite said wound for absorbing wound exudate passed from said wound to said first absorbent layer. - View Dependent Claims (6)
-
-
10. A wound dressing comprising:
-
a first flexible absorbent layer impregnated with a dehydrated hydrogel material which is substantially exposed at the outer surface of said wound dressing to preclude said first absorbent layer from adhering to said wound and capable of absorbing wound exudate upon contact with a wound, said dehydrated hydrogel material being devoid of water and said first absorbent layer being perforated to facilitate the passage of wound exudate emitted by said wound which is not absorbable by said first absorbent layer; a second flexible absorbent layer mounted onto said first absorbent layer; and a third flexible absorbent layer impregnated with said dehydrated hydrogel material for absorbing wound exudate upon contact with a wound, said third absorbent layer being mounted to said second absorbent layer opposite said first absorbent layer such that wound exudate is absorbed by said second absorbent layer upon passage of wound exudate from said first absorbent layer and said third absorbent layer between which said second absorbent layer is sandwiched, and said third absorbent layer being perforated to facilitate the passage of wound exudate emitted by said wound which is not absorbable by said first absorbent layer. - View Dependent Claims (11, 12, 13, 14, 15)
-
Specification