Patent ID: 9408755
Filing Date: 2016-08-09
CPC Classification: A61F,A61M

Claim Text:
1. A wound drainage dressing for placing on a wound that is to be treated by vacuum, wherein the wound drainage dressing is suitable for inserting a drainage hose into the wound from outside and for connecting this drainage hose to a vacuum pump in order to generate a vacuum in the wound and suck out the wound liquid present in the wound, wherein the wound drainage dressing has at least two layers arranged one on top of the other, wherein a first layer facing the wound is a textile material, and a second layer, arranged over the first layer, and made of a different material than the first layer, is dimensionally stable such that when the vacuum is applied to the wound, the second layer does not collapse, the second layer being permeable to liquid, and wherein the first layer is made from a functional textile material which has an anisotropic configuration and which performs active transport of liquid, the active transport of the first layer comprising the transport of wound liquid away from the wound into the second layer without application of the vacuum, the first layer having capillaries for the active transport of the liquid into the second layer, wherein a drainage hose is directly inserted laterally into the second layer without passing through the third layer, the drainage hose merging into distributor tubes which are arranged in the second layer, wherein the distributor tubes have a plurality of suction openings distributed about a circumference and wherein the distributor tubes extend approximately across the entire width and length of the second layer, and wherein the wound drainage dressing further comprises a third layer arranged over the second layer, the third layer being impermeable to liquid, the third layer further being transparent such that a flow of wound liquid in the second layer can be monitored.