Prospective randomized study of x-ray pelvimetry in the primigravida

Area of Science:

• Obstetrics and Gynecology
• Radiology in Pregnancy

Background:

• X-ray pelvimetry has been used to assess pelvic dimensions before labor induction or augmentation.
• Clinical assessment of pelvic size has limitations, with varying agreement rates compared to radiological assessment.

Purpose of the Study:

• To determine the clinical usefulness of pre-induction x-ray pelvimetry in primiparous women.
• To evaluate the impact of routine x-ray pelvimetry on pregnancy outcomes and labor management.

Main Methods:

• Prospective randomized study involving 200 primiparous women.
• Comparison of clinical versus radiological assessment of pelvic dimensions.
• Analysis of pregnancy outcomes, including mode of delivery and Apgar scores, between pelvimetry and non-pelvimetry groups.

Main Results:

• Agreement between clinical and radiological pelvic size assessment was 76.5%.
• No significant differences in overall pregnancy outcomes between the groups.
• In labor induction subgroups, the pelvimetry group had fewer forceps deliveries and lower five-minute Apgar scores.
• Patients with clinically borderline pelves undergoing x-ray pelvimetry showed a higher cesarean section rate.

Conclusions:

• Eliminating routine x-ray pelvimetry in primigravida women, when electronic fetal monitoring is employed, does not compromise infant outcomes.
• X-ray pelvimetry may be reconsidered as a routine procedure before oxytocin induction or augmentation.