Sonographic assessment of the lower uterine segment during active labor in women with or without a uterine scar–a prospective study

Eran Barzilay, Amir Shay, Hila Lahav-Ezra, Avi Shina, Sharon Perlman, Reuven Achiron, Yinon Gilboa

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: No study thus far has evaluated the LUS thickness in active labor. In this study, we endeavored to assess the LUS during active labor. Methods: Using transabdominal sonography in the mid-sagittal position with a full urinary bladder, the thickness of the LUS was measured during active labor phase in women with or without a history of a previous cesarean section. Results: A total of 28 women with a previous cesarean delivery were compared to 29 women without a history of uterine surgery. The median LUS was significantly thinner in women with a uterine scar both during (4 versus 5 mm, p =.001) and between contractions (5 versus 7 mm, p =.011). Paired comparison of LUS thickness between and during contractions within each group showed that thinning of LUS during contraction was significant for both the previous CS group (p <.001) and the control group (p <.001). We found no correlation between LUS thickness and chances of successful TOLAC. Conclusions: In this study, we characterized for the first time the LUS during active labor. We found that LUS was significantly thinner in women after a previous CS and that the LUS was significantly thinner during contraction.

Original languageEnglish
Pages (from-to)1885-1888
Number of pages4
JournalJournal of Maternal-Fetal and Neonatal Medicine
Volume31
Issue number14
DOIs
StatePublished - 18 Jul 2018

Keywords

  • Lower uterine segment
  • trial of labor after cesarean
  • uterine contractions
  • uterine rupture

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