Construction of a loop colostomy - abdominal wall

These figures depict the loop of colon being brought onto the abdominal wall. A plastic rod or red rubber catheter prevents retraction of the bowel into the abdominal cavity.
(A) shows a small opening made in the mesentery with a finger, just large enough to pass the rod or catheter.
(B) shows the rod in place.
(C) shows a tube catheter attached to each end of the rod.