title: A study of the use of radiological pelvimetry in a Chinese population.
abstract: BACKGROUND
  To audit the use of radiological pelvimetry in a teaching obstetric unit in a Chinese population.
  
  
  METHODS
  A prospective observational study included all radiological pelvimetries performed in one obstetric unit over 8 months. All pelvimetries were assessed by one of the authors, and the outcome of pregnancy was reviewed.
  
  
  RESULTS
  Among 5576 women delivered in that period, 298 (5.3%) had a pelvimetry. The anteroposterior diameter of the outlet (APO) was on average 9.3 mm smaller than the obstetric conjugate (OC), and was below the definition of pelvic contraction in more than 70% of cases. Previous Cesarean sections accounted for 90.9% of the antenatal radiological pelvimetries. The result of this investigation affected the clinical management in more than 80% of these patients. The chance of successful vaginal delivery was directly related to the pelvic dimensions.
  
  
  CONCLUSIONS
  Radiological pelvimetry may provide additional information which could facilitate the counseling of patients with a history of previous Cesarean section.
authors.affiliation: Department of Obstetrics and Gynaecology, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin.
authors.forename: T K
authors.initials: TK
authors.lastname: Lau
authors.forename: C M
authors.initials: CM
authors.lastname: Leung
authors.forename: C Y
authors.initials: CY
authors.lastname: Li
mesh_terms: D044466:Asian People; D002585:Cesarean Section; D002681:China; D005260:Female; D006801:Humans; D007746:Labor Presentation; D010387:Pelvimetry; D010388:Pelvis / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011446:Prospective Studies; D011859:Radiography; D014219:Trial of Labor