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Dilated bowel loops: Loops proximal to the obstruction exhibit dilation (>2.5-3 cm in diameter). Transition zone: A point where the caliber of the bowel changes from dilated to collapsed, indicating the site of obstruction. Air-fluid levels: Seen in upright or decubitus imaging, reflecting stasis of luminal contents.
Bowel obstruction, also known as intestinal obstruction, is a mechanical or functional obstruction of the intestines which prevents the normal movement of the products of digestion. [2] [5] Either the small bowel or large bowel may be affected. [1] Signs and symptoms include abdominal pain, vomiting, bloating and not passing gas. [1]
Ultrasound and computed tomography (CT) imaging of the abdomen can confirm the diagnosis by demonstrating dilated loops of intestine with material in the intestinal lumen with bubbles. [1] Air-fluid levels may be seen in those affected by DIOS. [1]
Intestinal pseudo-obstruction (IPO) is a clinical syndrome caused by severe impairment in the ability of the intestines to push food through. It is characterized by the signs and symptoms of intestinal obstruction without any lesion in the intestinal lumen. [ 1 ]
Simple and cheap to perform, plain film x-rays can show the traditional indicator of air-fluid levels and dilated bowel loops, which is best seen in the erect film. [25] Abdominal x-rays, however, are unable to definitively differentiate between genuine mechanical intestinal obstruction and pseudo-obstruction. [26]
Volvulus causes severe pain and progressive injury to the intestinal wall, with accumulation of gas and fluid in the portion of the bowel obstructed. [11] Ultimately, this can result in necrosis of the affected intestinal wall, acidosis, and death. This is known as a closed-loop obstruction because there exists an isolated ("closed") loop of bowel.
Chilaiditi syndrome is a rare condition when pain occurs due to transposition of a loop of large intestine (usually transverse colon) in between the diaphragm and the liver, visible on plain abdominal X-ray or chest X-ray. [1] Normally this causes no symptoms, and this is called Chilaiditi's sign. The sign can be permanently present, or ...
Ogilvie syndrome, or acute colonic pseudo-obstruction, is the acute dilatation of the colon in the absence of any mechanical obstruction in severely ill patients. [ 1 ] Acute colonic pseudo-obstruction is characterized by massive dilatation of the cecum (diameter > 10 cm) and right colon on abdominal X-ray.