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Intestinal ischemia is a medical condition in which injury to the large or small intestine occurs due to not enough blood supply. [2] It can come on suddenly, known as acute intestinal ischemia, or gradually, known as chronic intestinal ischemia. [ 1 ]
In human anatomy, the superior mesenteric artery (SMA) is an artery which arises from the anterior surface of the abdominal aorta, just inferior to the origin of the celiac trunk, and supplies blood to the intestine from the lower part of the duodenum through two-thirds of the transverse colon, as well as the pancreas.
Bowel obstruction is most often caused by intestinal adhesions, which frequently form after abdominal surgeries, or by chronic infections such as diverticulitis, hepatitis, and inflammatory bowel disease. The condition may be difficult to diagnose, as the symptoms may resemble those of other bowel disorders. [4]
The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. [2] Other signs and symptoms include feeling tired, dizziness, and pale skin color. [18]
Ischemia (loss of blood flow) to the affected portion of intestine. Depending on the location of the volvulus, symptoms may vary. For example, in patients with cecal volvulus, the predominant symptoms may be those of small bowel obstruction (nausea, vomiting and lack of stool or flatus), because the obstructing point is close to the ileocecal ...
Dieulafoy's lesion are typically diagnosed during endoscopic evaluation, usually during upper endoscopy, which may show an isolated protruding blood vessel. [1] Lesions affecting the colon or end of the small bowel (terminal ileum) may be diagnosed during colonoscopy. Dieulafoy's lesions are not easily recognized and therefore multiple ...
A lower gastrointestinal bleed is defined as bleeding originating distal to the ileocecal valve, which includes the colon, rectum, and anus. [2] LGIB was previously defined as any bleed that occurs distal to the ligament of Treitz, which included the aforementioned parts of the intestine and also included the last 1/4 of the duodenum and the entire area of the jejunum and ileum. [1]
Intussusception is a medical condition in which a part of the intestine folds into the section immediately ahead of it. [1] It typically involves the small intestine and less commonly the large intestine. [1] Symptoms include abdominal pain which may come and go, vomiting, abdominal bloating, and bloody stool. [1]