Abstract: A negative pressure wound dressing and method of making same includes a flexible foamed polymeric material having a plurality of channels or holes formed by a laser within the cellular structure thereof, the flexible foamed polymeric material for use to contact a wound contact surface in negative pressure wound treatment.

Abstract: A method for forming an article where a friable material is supported by or enclosed by a non-friable material. The article comprises one or more layers of non-friable fibers surrounding the friable material fibers wherein at least some of the non-friable fibers are oriented in a Z plane and at least some of the non-friable fibers are oriented in an XY plane. The fibers are oriented in the Z plane via a felting process such as needle punching through the assembly of the article. The resulting article is a non-woven article even where one or more layer for the article was provided as woven or non-woven layer of fibers.

Abstract: A method of forming one or more perforations, holes, or capillaries in a hydrogel material, hydrocolloid material, hydrogel adhesive or silicone adhesive comprising directing a focal point of a laser beam to a surface of the material or adhesive at one or more locations to form one or more perforations, holes, or capillaries having a selected diameter. The perforated hydrogel material or adhesive can be used in wound care dressings, wearable sensors, or devices intended to contact living tissue. The perforated material or adhesive may also be provided in contact with an exudate holding mechanism such as an open cell foam material to further increase the exudate absorbance of the hydrogel or hydrocolloid wound care dressing.