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Roentgenographic pelvimetry in single vertex pregnancies
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.
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.