Relationships between progress of labor and mode of delivery and levator hiatus

2016 Fiscal Year Final Research Report

• Project/Area Number: 26670972
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Lifelong developmental nursing
• Research Institution: The University of Tokyo
• Principal Investigator: Haruna Megumi 東京大学, 大学院医学系研究科(医学部), 准教授 (00332601)
• Research Collaborator: ASHIDA Sayaka 東京大学, 大学院・医学系研究科, 大学院生
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 分娩 / 妊娠 / 経会陰3D超音波 / 挙筋裂孔

Outline of Final Research Achievements

The aim of this study was to clarify relationships between progress of labor or mode of delivery and levator hiatus in pelvic floor measured by transperineal three dimensional ultrasonography. Results of this study showed no correlation between duration of second stage of labor and levator hiatus at third trimester among primiparous women. Women with cesarean had significantly smaller levator hiatus area in third trimester than women with natural vaginal delivery. In addition, logistic regression analysis showed smaller risk of emergency cesarean in those with larger levator hiatus area in third trimester. It was suggested that evaluation of levator hiatus in third trimester by ultrasonography can predict mode of delivery.

Free Research Field

助産学