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Coffee ground vomitus refers to a particular appearance of vomit. Within organic heme molecules of red blood cells is the element iron , which oxidizes following exposure to gastric acid . This reaction causes the vomitus to look black like coffee grounds
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] A number of foods and medications can turn the stool either red or black in the absence of bleeding. [2]
The strongest predictors of an upper gastrointestinal bleed are black stool, age <50 years, and blood urea nitrogen/creatinine ratio 30 or more. [8] [9] The diagnosis of upper gastrointestinal bleeding is assumed when hematemesis (vomiting of blood) is observed. [citation needed]
Bleeding − bloody or black, tar-like stools, red or dark brown urine, vomiting blood or brown material that looks like coffee grounds, small, red or purple spots on skin, unusual bleeding or ...
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Coffee-ground-like vomit suggests less severe bleeding in the stomach because the gastric acid has had time to change the composition of the blood; Yellow or green vomit suggests bile, indicating that the pyloric valve is open and bile is flowing into the stomach from the duodenum. This may occur during successive episodes of vomiting after the ...
Hematemesis is the vomiting of blood. [1] This is usually vomit that contains bright red blood. [2] Coffee ground vomiting is similar to hematemesis, but is distinct in not involving bright red blood. [3] Hematemesis must be differentiated from hemoptysis (coughing up blood) and epistaxis (nosebleed). [4] Both of these are more common conditions.
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