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Ileostomy
''Ileostomy'' can refer to a stoma (surgical opening) constructed by bringing the end or loop of small intestine (the ''ileum'') out onto the surface of the skin and to the surgical procedure which creates this opening. Intestinal waste passes out of the ileostomy and is collected in an artificial external pouching system which is adhered to the skin. Ileostomies are usually sited above the groin on the right hand side of the abdomen.
==Reasons for having an ileostomy==
Ileostomies are necessary where injury or a surgical response to disease has rendered the large intestine incapable of safely processing intestinal waste, typically because the colon and rectum have been partially or wholly removed.
Diseases of the large intestine which may require surgical removal include Crohn's disease, ulcerative colitis, familial adenomatous polyposis, and total colonic Hirschsprung's disease.〔(''Ileostomy Guide'' ); by the American Cancer Society; Cancer.org website; retrieved January 2014.〕 An ileostomy may also be necessary in the treatment of colorectal cancer or ovarian cancer. One example is a situation where the cancer tumor is causing a blockage. In such a case the ileostomy may be temporary, as the common surgical procedure for colorectal cancer is to reconnect the remaining sections of colon or rectum following removal of the tumor provided that enough of the rectum remains intact to preserve internal/external anal sphincter function.
In a ''temporary'' or ''loop ileostomy'', a loop of the ileum is surgically brought through the skin creating a stoma, but keeping the lower portion of the ileum for future reattachment in cases where the entire colon and rectum are not removed but need time to heal. Temporary ileostomies are also often made as the first stage in surgical construction of an ileo-anal pouch, so fecal material doesn't enter the newly made pouch until it heals and has been tested for leaks—usually requiring a period of eight to ten weeks. When healing is complete the temporary ileostomy is then "taken down" (or reversed) by surgically repairing the loop of intestine which made the temporary stoma and closing the skin incision.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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