Medical dressing
View Patent ↗A medical dressing composed of a continuous frame enclosing a first surface area and having a bottom surface coated with an adhesive material and an upper surface, a polyurethane layer having a second surface area which covers the first surface area and is larger than the first surface area, and a layer opaque to UV rays having a third surface area, which covers the second surface area and is equal or larger than the second surface area.
1 . A medical dressing comprising:
(a) a continuous frame enclosing a first surface area, said continuous frame comprises a bottom surface comprising an adhesive material, and an upper surface, wherein said continuous frame is 0.1 to 2 cm thick;
(b) a layer comprising polyurethane having a second surface area, said second surface area covers said first surface area and is equal or larger than said first surface area, said layer comprising polyurethane is partially non-reversibly connected to said continuous frame, wherein said partially non-reversibly connected comprises: a reversibly connecting adhesive and a non-reversibly connecting adhesive, and wherein said non-reversibly connecting adhesive is located in a distinct face or side within a perimetrical area of the continuous frame, and wherein the ratio between areas of said reversibly connecting adhesive and said non-reversibly connecting adhesive is 2:1 to 10:1; and
(c) a layer opaque to UV rays having a third surface area, said third surface area covers said second surface area and is larger than said second surface area, said layer opaque to UV rays is at least partially reversibly connected to: said continuous frame, a top surface of said layer comprising polyurethane, or both, wherein said layer opaque to UV rays, said layer comprising polyurethane, or both comprises a pull-tab.
2 . The medical dressing of claim 1 , wherein said layer comprising polyurethane is porous.
3 . The medical dressing according to claim 2 , wherein said porous layer comprising polyurethane is characterized by a pore size of 0.1 to 1 μm.
4 . The medical dressing of claim 1 , wherein a bottom surface of said layer comprising polyurethane contacts a non-woven-fabric surface.
5 . The medical dressing according to claim 4 , wherein said non-woven-fabric surface comprises natural fibers, semi-natural fibers, fibers synthetic fibers, or any combination thereof.
6 . The medical dressing of claim 1 , further comprising one or more channels laminated to the bottom surface of said continuous frame.
7 . The medical dressing of claim 6 , wherein the one or more channels include at least one first opening located at a middle of the bottom surface and at least one second opening located outside the medical dressing.
8 . The medical dressing according to claim 1 , wherein said layer opaque to UV rays, said layer comprising polyurethane or both has a thickness of between 50 and 1000 μm.
9 . The medical dressing of claim 1 , wherein said continuous frame is impermeable to a passage of a liquid, a bacterium, a virus, or any combination thereof.
10 . The medical dressing of claim 1 , wherein said continuous frame has an aqueous solution absorbance capacity.
11 . The medical dressing of claim 1 , wherein said continuous frame, said layer opaque to UV rays, said layer comprising polyurethane or any combination thereof comprises an antimicrobial substance, an anti-infective agent, polyhexamethylene biguanide, chlorhexidine, silver, iodine, iodophor, benzalkonium chloride, hydrogen peroxide, an antibiotic, a debridement agent, an analgesic, a healing factor, a nitric oxide releasing material, a matrix metalloproteinase inhibitor, a vitamin, a growth factor, a cannabinoid, a terpene, or any combination thereof.
12 . The medical dressing of claim 1 , wherein said layer opaque to UV rays comprises a metallized surface.
13 . The medical dressing of claim 1 , wherein said continuous frame comprises non-woven fabric felts, synthetic material felts, fiber flocks, or any combination thereof.
14 . The medical dressing of claim 1 , wherein said second surface area comprising non-reversibly connecting adhesive of said layer opaque to UV rays, said layer comprising polyurethane or both is located in a perimetrical area of said continuous frame.
15 . The medical dressing of claim 1 , wherein said layer opaque to UV rays, said layer comprising polyurethane or both is solid and flexible.
16 . The medical dressing of claim 1 , further comprising a self-sealing film.
17 . A method for protecting a topical lesion, comprising applying a medical dressing on the topical lesion, wherein a continuous frame surrounds at least a portion of said topical lesion, thereby protecting said topical lesion,
wherein the medical dressing comprises:
(a) a continuous frame enclosing a first surface area, said continuous frame comprises a bottom surface comprising an adhesive material, and an upper surface, wherein said continuous frame is 0.1 to 2 cm thick;
(b) a layer comprising polyurethane having a second surface area, said second surface area covers said first surface area and is equal or larger than said first surface area, said layer comprising polyurethane is partially non-reversibly connected to said continuous frame, wherein said partially non-reversibly connected comprises: a reversibly connecting adhesive and a non-reversibly connecting adhesive, and wherein said non-reversibly connecting adhesive is located in a distinct face or side within a perimetrical area of the continuous frame, and wherein the ratio between areas of said reversibly connecting adhesive and said non-reversibly connecting adhesive is 2:1 to 10:1; and
(c) a layer opaque to UV rays having a third surface area, said third surface area covers said second surface area and is larger than said second surface area, said layer opaque to UV rays is at least partially reversibly connected to: said continuous frame, a top surface of said layer comprising polyurethane, or both, wherein said layer opaque to UV rays, said layer comprising polyurethane, or both comprises a pull-tab.