A simple discriminatory test for upper gastrointestinal hemorrhage.
D000641:Ammonia / Q000097:blood*; D004932:Esophageal and Gastric Varices; D004947:Esophagus; D006471:Gastrointestinal Hemorrhage; D041981:Gastrointestinal Tract; D006470:Hemorrhage; D014648:Varicose Veins
D000641:Ammonia
AMMONIA/in blood; ESOPHAGUS/varix; GASTROINTESTINAL SYSTEM/hemorrhage