title: Abdominal compression: a valuable aid in the examination of the esophagus.
mesh_terms: D000005:Abdomen; D000328:Adult; D000368:Aged; D003680:Deglutition Disorders / Q000000981:diagnostic imaging; D004935:Esophageal Diseases / Q000000981:diagnostic imaging*; D004938:Esophageal Neoplasms / Q000000981:diagnostic imaging*; D004941:Esophagitis / Q000000981:diagnostic imaging; D004942:Esophagitis, Peptic / Q000000981:diagnostic imaging; D005260:Female; D006548:Hernia, Diaphragmatic / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011292:Premedication; D000644:Quaternary Ammonium Compounds / Q000627:therapeutic use; D011859:Radiography; D013679:Technology, Radiologic
chemical_list: D000644:Quaternary Ammonium Compounds