Definition of ileostomy in US English:


nounPlural ileostomies

  • 1A surgical operation in which a piece of the ileum is diverted to an artificial opening in the abdominal wall.

    • ‘Total proctocolectomy and ileostomy is the curative surgical treatment for ulcerative colitis.’
    • ‘This is more common in patients who have not undergone a temporary diverting ileostomy.’
    • ‘In young children, depending on how much bowel was removed, ileostomy or colostomy is often a temporary condition that can later be reversed with another operation.’
    • ‘Mucosal atrophy may result when dietary sources of fatty acids are lacking or when the fecal stream is diverted by an ileostomy or colostomy.’
    • ‘Until recently, surgical treatment implied permanent ileostomy, a prospect unacceptable to many patients.’
    1. 1.1 An opening so formed.
      • ‘Diarrhea is more common in patients with ileostomies and proximal colostomies, and patients may not appreciate that fluid outputs are normal in these cases because of the loss of water absorption from the colon.’
      • ‘The minimal daily output from an established ileostomy is often as low as 800 milliliters.’
      • ‘An ileostomy is a surgically formed opening into the lower part of the small intestine (the ileum), which is then brought out through the abdominal wall creating a mouth or opening known as a stoma.’
      • ‘Typically, patients return to the hospital after approximately three months to have the temporary ileostomy taken down to restore bowel continuity.’
      • ‘Two weeks later he was admitted for an anterior resection and defunctioning ileostomy.’


Late 19th century: from ileum + Greek stoma ‘mouth’.