title: Difficult sigmoid colon intubation: guide wire exchange technique.
authors.forename: R M
authors.initials: RM
authors.lastname: Ness
authors.forename: K
authors.initials: K
authors.lastname: Gottlieb
authors.forename: D K
authors.initials: DK
authors.lastname: Rex
authors.forename: G A
authors.initials: GA
authors.lastname: Lehman
mesh_terms: D012809:Colon, Sigmoid; D020685:Colonoscopes; D020699:Gastroscopes; D006801:Humans; D007441:Intubation, Gastrointestinal / Q000379:methods*