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Hematochezia is commonly associated with lower gastrointestinal bleeding, but may also occur from a brisk upper gastrointestinal bleed. The difference between hematochezia and rectorrhagia is that rectal bleeding is not associated with defecation; instead, it is associated with expulsion of fresh bright red blood without stools. [2]
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]
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]
Hematemesis (vomiting blood), coffee ground vomiting, melena, hematochezia (maroon-coloured stool) in severe cases Upper gastrointestinal bleeding ( UGIB ) is gastrointestinal bleeding in the upper gastrointestinal tract , commonly defined as bleeding arising from the esophagus , stomach , or duodenum .
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]
Rectal bleeding refers to bleeding in the rectum, thus a form of lower gastrointestinal bleeding.There are many causes of rectal hemorrhage, including inflamed hemorrhoids (which are dilated vessels in the perianal fat pads), rectal varices, proctitis (of various causes), stercoral ulcers, and infections.
Dysentery should not be confused with hematochezia, which is the passage of fresh blood through the anus, usually in or with stools. [24] Physical exam.
Hematemesis, melena, and hematochezia are symptoms of acute gastrointestinal bleeding. Bleeding that brings the patient to the physician is a potential emergency and must be considered as such until its seriousness can be evaluated.