Assura pressure plate Easy to use Allowing one-piece system users to irrigate with the Assura Irrigation Set. Irrigation creates security and freedom for people with a sigmoid colostomy, enabling a regular, controlled bowel movement. Assura Irrigation Faceplate Allows one-piece system users to irrigate with the Assura Irrigation Set For use together with an ostomy belt, such as the Brava belt After irrigating, an Assura Stoma Cap is recommended. Irrigation should not be self-administered before you have been fully instructed by a doctor or nurse.