title: Ultrasonographic measurement of the symphysis pubis: a potential method of studying symphyseolysis in pregnancy.
abstract: The width of the symphysis pubis was measured in a skeleton model using slide rule, ultrasonography and x-ray. Ultrasonography gave a 0.5-mm and x-ray a 1.0-mm narrower gap than the slide rule. Further, 15 nonpregnant females undergoing urography volunteered for an extra ultrasonography of the symphysis pubis. The widths of the symphysis as measured from the x-ray exposures and the ultrasonography were compared. Regression analysis gave a regression coefficient of 0.979 and a correlation coefficient of 0.850. Ultrasonography offers at least the same precision as x-ray for assessing the width of the symphyseal gap.
authors.affiliation: Department of Obstetrics and Gynaecology, Akademiska Hospital, Uppsala University, Sweden.
authors.forename: K
authors.initials: K
authors.lastname: Björklund
authors.forename: S
authors.initials: S
authors.lastname: Bergström
authors.forename: P G
authors.initials: PG
authors.lastname: Lindgren
authors.forename: U
authors.initials: U
authors.lastname: Ulmsten
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D011631:Pubic Symphysis / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D011859:Radiography; D012044:Regression Analysis; D014463:Ultrasonography