Patent ID: 11944521
Assignee: FIRST WATER LIMITED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A composition for application to a wound, the composition comprising:
a first layer comprising a skin adhesive with a low water absorption, such that, when immersed in water at 20° C. for a period of 1 hour, the skin adhesive absorbs an amount of water equal to 40% or less of a weight of the skin adhesive,
wherein the first layer has a wound-facing side and a non-wound-facing side and, in a first area, apertures extend through the first layer from the wound-facing side to the non-wound-facing side, the first layer having a second area that extends to an edge of the composition and forms a perimeter around the first area, the perimeter lacking apertures therethrough, and, in-use, the wound-facing side of the first layer is configured to contact the wound,
wherein a mean area of the apertures on at least one of the wound-facing side and non-wound-facing side of the first layer is at least 20 mm2; and
a second layer disposed adjacent to the non-wound-facing side of the first layer, the second layer being an outermost layer of the composition, the second layer comprising a polymeric film that is continuous in that it extends over and covers each of the apertures of the first layer, the second layer having a moisture vapour transmission rate (MVTR) of at least 500 g/m2/24 hours, measured in accordance with BS EN 13726-2:2002,
wherein the composition further comprises a third layer disposed between the first layer and second layer, the third layer comprising a polymeric film and being a supporting layer for the first layer, the third layer having apertures therethrough, substantially corresponding to the apertures in the first layer;
wherein a fourth layer is disposed between the second layer and the third layer, the fourth layer comprising an adhesive that contacts the second layer and the third layer, the fourth layer also having apertures therethrough substantially corresponding to the apertures in the first and third layer;
and wherein each of the first, second, and third layers extends to the edge of the composition, the third layer being between the first and second layers at the edge.