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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]
Blood in stool looks different depending on how early it enters the digestive tract—and thus how much digestive action it has been exposed to—and how much there is. The term can refer either to melena, with a black appearance, typically originating from upper gastrointestinal bleeding; or to hematochezia, with a red color, typically originating from lower gastrointestinal bleeding. [6]
An upper GI bleed is more common than lower GI bleed. [2] An upper GI bleed occurs in 50 to 150 per 100,000 adults per year. [8] A lower GI bleed is estimated to occur in 20 to 30 per 100,000 per year. [2] It results in about 300,000 hospital admissions a year in the United States. [1] Risk of death from a GI bleed is between 5% and 30%.
Abdominal pain, also known as a stomach ache, is a symptom associated with both non-serious and serious medical issues. Since the abdomen contains most of the body's vital organs, it can be an indicator of a wide variety of diseases.
The most common signs and symptoms are bleeding, which can vary from minor to severe, rectal prolapse and incomplete evacuation (35%-76% of cases). [4] According to one report, constipation is present in about 55% of cases, but diarrhea is present in 20%–40% of cases. [1] Reported symptoms are: Hematochezia (lower gastrointestinal bleeding ...
In some occasions, severe abdominal cramps, fever, shock, and delirium can all be symptoms. [2] [14] [15] [16] In extreme cases, people may pass more than one liter of fluid per hour. More often, individuals will complain of diarrhea with blood, accompanied by extreme abdominal pain, rectal pain and a low-grade fever.
When present, symptoms usually relate to painless bleeding, with vomiting blood (hematemesis) and/or black stools . [3] Less often, Dieulafoy's lesions may cause rectal bleeding (hematochezia), or rarely, iron deficiency anemia. Usually, there are no gastrointestinal symptoms that precede the bleeding (abdominal pain, nausea, etc.).
Types of mesenteric ischemia are generally separated into acute and chronic processes, because this helps determine treatment and prognosis. [4] 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.