title: Air-contrast colon examination and sigmoid hernia: avoiding perforation.
authors.forename: J O
authors.initials: JO
authors.lastname: Johnson
authors.forename: J R
authors.initials: JR
authors.lastname: Amberg
mesh_terms: D000388:Air; D003106:Colon / Q000000981:diagnostic imaging*; D003108:Colonic Diseases / Q000517:prevention & control*; D003287:Contrast Media; D004733:Enema / Q000009:adverse effects*; D006547:Hernia / Q000209:etiology; D006801:Humans; D007416:Intestinal Perforation / Q000517:prevention & control*; D011859:Radiography; D012810:Sigmoid Diseases / Q000209:etiology*
chemical_list: D003287:Contrast Media