Final answer:
A B. colostomy is a surgical opening in the abdomen wall to collect digestive waste in an external bag, often performed when a fecal pouch or ileostomy is not viable.
Step-by-step explanation:
The surgical opening in the wall of the abdomen with a plastic bag in place to collect digestive waste is known as a B. colostomy.
A colostomy involves creating an opening in the abdominal wall through which the end of the large intestine is brought to the surface.
This allows for fecal matter to be collected in a bag adhered to the skin, bypassing the need for the waste to pass through the rectum and anus.
A new fecal pouch, sometimes called a J-pouch, can be constructed using parts of the small intestine, which can be connected to the anus in some cases.
However, when a J-pouch cannot be created, an ileostomy may be performed. This involves bringing the distal ileum (the end of the small intestine) through the abdominal wall.
Unlike a colostomy, which diverts the large intestine, an ileostomy diverts the small intestine, and the output is typically more liquid.