title: [Diagram for the prognosis of cephalo-pelvic disproportions. Application in 300 cases of pelvic contraction].
abstract: The authors using the information obtained by X-ray pelvimetry and ultrasound cephalometry in 300 cases of contracted pelves, suggest a diagram of cephalo-pelvic disproportion that can be used in the great majority of cases of contracted pelves. It is not applicable to those where there is significant deformation of the middle strait or an abnormality of presentation. It is divided into three zones: 1. A superior zone, favourable, into which the majority (60%) of cases of contracted pelvis fit. The risk of a serious dystocia during delivery is so small (less than 2%) that it can be considered scarcely different from those found in women with a normal pelvis. 2. An intermediate zone into which 24% of cases of contracted pelvis fit where the prognosis is uncertain. The labour should be considered as an "at risk" labour and a trial of labour conducted. 3. A lower zone into which 16% of the cases fit and which consists of two categories: --those in which the biparietal diameter is equal to or less than 90 mm. Prophylactic caesarean section should be avoided in these cases where disproportion is rare and where there is a risk of delivering a premature infant: and --those more numerous (9 out of 10) where the biparietal diameter is more than 90 mm and where, unless there is a clinically definitely favourable prognosis, it is justifiable to carry out prophylactic caesarean section. If this line is followed: one can avoid a large number of trials of labour, all of which are inconvenient and some of which are dangerous for the child; few unnecessary caesarean sections are carried out.
mesh_terms: D000328:Adult; D000886:Anthropometry; D002585:Cesarean Section; D000013:Congenital Abnormalities / Q000175:diagnosis*; D005189:False Positive Reactions; D005260:Female; D005333:Fetus / Q000033:anatomy & histology*; D006801:Humans; D008722:Methods; D008954:Models, Biological; D007744:Obstetric Labor Complications; D010384:Pelvic Bones / Q000000981:diagnostic imaging / Q000196:embryology*; D011247:Pregnancy; D011379:Prognosis; D011859:Radiography; D014463:Ultrasonography
vernacular_title: Diagramme pour le pronostic des disproportions céphalo-pelviennes. Application à 300 observations de rétrécissements pelviens