Utilization of an antimesenteric slit is a maneuver facilitating primary maturation of the end colostomy stoma. It widens the lumen, makes eversion easier, and permits tailoring the stoma to size. Primary maturation helps prevent late stomal stricture.
Murry G. Fischer. The Antimesenteric SlitAn Aid in the Primary Maturation of the End Colostomy. Arch Surg. 1974;109(4):580–581. doi:10.1001/archsurg.1974.01360040090024