title: Haematemesis as an index of blood-loss.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D002908:Chronic Disease; D004381:Duodenal Ulcer / Q000150:complications; D005243:Feces / Q000032:analysis; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology; D005773:Gastroscopy; D006396:Hematemesis / Q000150:complications*; D006400:Hematocrit; D006801:Humans; D008297:Male; D008551:Melena / Q000150:complications; D008875:Middle Aged; D010438:Peptic Ulcer Hemorrhage / Q000150:complications; D013276:Stomach Ulcer / Q000150:complications; D014680:Veins; D014690:Venous Pressure