| 单词 | melena |
| 释义 | melena noun[U] medicaluk/məˈliː.nə/us/məˈliː.nə/USspelling ofmelaena （melaena的美式拼写）Animal physiology: excrement & its excretion
Examplesofmelenamelena Portal hypertension may be present, resulting in other conditions including splenomegaly, hematemesis andmelena. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.Hematemesis,melena, hemoptysis, hematuria and epistaxis also occur and may lead to hypovolemic shock. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Blood may be observed in vomit (hematemesis) or in altered form in the stool (melena). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Gastrointestinal lymphoma causes vomiting, diarrhea, andmelena(digested blood in the stool). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The symptoms can include hematemesis, or vomiting blood;melena, passing black, tarry stools; or passing maroon stools or frank blood in the stools. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Some individuals may have bleeding in the esophagus, manifesting as vomiting of blood or asmelenastools. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Very often, however, aside from themelenaitself, there are no other symptoms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Melenais often a medical emergency as it arises from a significant amount of bleeding. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.This is known asmelena, and is typically due to bleeding in the upper digestive tract, such as from a bleeding peptic ulcer. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Adverse events such as vomiting andmelena(dark color feces) can also occur. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.For this reason,melenais often associated with blood in the stomach or duodenum (upper gastrointestinal tract), for example by a peptic ulcer. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.A less serious, self-limiting case ofmelenacan occur in newborns two to three days after delivery, due to swallowed maternal blood. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These include dysphagia, weight loss, anemia, signs of upper gastrointestinal bleeding (such as hematemesis ormelena) and jaundice. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.As the disease progresses, hematuria,melenaand menorrhagia may develop. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Melenahas a taste for alcohol and pinlobble leaves (which act as a tranquiliser). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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