NOTE: The thicknesses for backing flanges noted in the tables are applicable to. steel. Different metals demand different thicknesses for the same performance, so for. metals other than steel, consideration must be given to thickness. Although Tables 4, 5, 6 and 7 in these guidelines make reference to pressure ratings.
Big difference : A subtotal colectomy is removing almost all the colon; usually just a couple of inches are left near the rectum. A partial colectomy is not done AFTER a subtotal colectomy because there is basically no colon left.
The large bowel is also called the large intestine or colon. 1  Removal of the entire colon and the rectum is called a proctocolectomy. 2  Removal of all of the colon but not the rectum is called subtotal colectomy.  Removal of part of the colon but not the rectum is called a partial colectomy.