title: The 'black hole' sign: a visual ultrasonographic sign of hip dislocation.
abstract: Visual analysis of dynamic ultrasonography was employed in the assessment of hip stability in the neonate/infant. The 'black hole' sign visually describes the clearly recognizable ultrasonographic image of hip dislocation/dislocatability. This sign adds objectivity to the technique of visual analysis and is to be recommended.
authors.affiliation: Department of Orthopaedic Surgery, Blackburn Royal Infirmary, UK.
authors.forename: J G
authors.initials: JG
authors.lastname: Warner
authors.forename: R W
authors.initials: RW
authors.lastname: Paton
mesh_terms: D006618:Hip Dislocation, Congenital / Q000000981:diagnostic imaging*; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D014463:Ultrasonography