title: Roentgenographic pelvimetry in single vertex pregnancies.
abstract: Of the 4,529 women delivered of infants at The John Hopkins Hospital during 1976 and 1977, 212 (5%) had roentgenographic pelvimetry. An analysis of a subgroup of 142 single vertex pregnancies with radiographic pelvimetry during this two-year period is presented. The cesarean section rate was 40% among patients selected for roentgenographic pelvimetry whose pelvis was found to be adequate. Vaginal delivery in women with a pelvis radiographically shown to be small was accomplished in 27% of patients with failure to progress in labor and in 22% of the patients with a fetus in the floating vertex presentation. Patients with a small pelvis who delivered vaginally had significantly smaller infants than those delivered by cesarean section (2,785 +/- 399 gm vs 3,146 +/- 433 gm). The only significant difference in pelvic measurements between these two groups occurred in the AP diameter of the inlet (11.5 +/- 1.1 cm vs 10.5 +/- 1.0 cm). Roentgenographic pelvimetry of single pregnancies as evaluated in this study appears to have limited clinical usefulness.
mesh_terms: D000293:Adolescent; D000328:Adult; D002585:Cesarean Section; D005260:Female; D006801:Humans; D008875:Middle Aged; D007744:Obstetric Labor Complications / Q000000981:diagnostic imaging; D010387:Pelvimetry; D010388:Pelvis / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011859:Radiography; D012189:Retrospective Studies