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内窥镜观察到的病变有下列一个或更多的特征时,可认为是出血:a.病变上有新鲜出血;b.新鲜或变成的血凝块或黑色血痂附着在病变上;c.突出在溃疡底部或边缘的血管。从狭窄的不能通过内窥镜的幽门反流回来的血不能作为十二指肠溃疡
Endoscopic lesions observed with one or more of the following characteristics may be considered as bleeding: a. Fresh bleeding on the lesion; b. Fresh or blood clots or black blood clots attached to the lesion; c Prominent blood vessels at the bottom or margins of the ulcer. Blood from the narrow can not be refluxed through the endoscopic pylorus can not be used as duodenal ulcer