Term breech delivery: does X-ray pelvimetry help?

Area of Science:

• Obstetrics and Gynecology
• Perinatal Medicine
• Diagnostic Imaging

Background:

• Breech presentation at term requires careful consideration for delivery mode.
• X-ray pelvimetry has been historically used to assess pelvic adequacy for vaginal birth.
• The necessity of X-ray pelvimetry in uncomplicated term breech presentations is debated.

Purpose of the Study:

• To evaluate the role of X-ray pelvimetry in the management of term singleton breech presentations.
• To compare obstetric and neonatal outcomes based on the use of X-ray pelvimetry for delivery mode decisions.

Main Methods:

• Retrospective audit of 267 term singleton breech presentations over 3 years.
• Comparison of outcomes across three groups based on X-ray pelvimetry usage: none, always, selective.
• Outcomes assessed included mode of delivery, Apgar scores, birth trauma, and neonatal special care unit admission.

Main Results:

• Significantly fewer elective Cesarean sections in the group not using X-ray pelvimetry (12.9%) compared to groups using it (27.2% and 33.8%; p < 0.05).
• Vaginal delivery rates after a trial of labor were similar across all groups (79.1%, 65.9%, 65.1%).
• Neonatal outcomes, including Apgar scores and birth trauma, were comparable among the groups.

Conclusions:

• X-ray pelvimetry is not essential for determining the mode of delivery in uncomplicated term singleton breech presentations.
• Avoiding routine X-ray pelvimetry can lead to a reduction in Cesarean sections without compromising neonatal safety.
• Satisfactory progress in labor is a more reliable indicator of pelvic adequacy for vaginal breech delivery.