Abstract: The object of the invention is an acellular dermal matrix (1) comprising a solid and flexible sheet (10) which is provided with a plurality of through-openings (4) and is characterized in that the openings (4) have an elongated shape and, in particular, are forming slits (40). The openings are particularly suitable for opening in the form of a diamond.

Abstract: The subject of the invention is a biological prosthesis suitable for gastrointestinal surgery and in particular for the treatment of parastomal hernias. It has a thickness (12) of between 0.5 and 4 mm, consisting of dermis removed from a part of an animal belonging to the family of pigs, cattle or goats, with the said part of the animal corresponding to a part extending from the area (16) located at the base of the tail next to the junction of the last sacral vertebrae up to an area (18) starting at the base of the tail and encompassing the circumference of at least a part of the caudal vertebrae.

Abstract: The subject of the invention is a biological prosthesis suitable for gastrointestinal surgery and in particular for the treatment of parastomal hernias. It has a thickness (12) of between 0.5 and 4 mm, consisting of dermis removed from a part of an animal belonging to the family of pigs, cattle or goats, with the said part of the animal corresponding to a part extending from the area (16) located at the base of the tail next to the junction of the last sacral vertebrae up to an area (18) starting at the base of the tail and encompassing the circumference of at least a part of the caudal vertebrae.