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

• 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
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 分娩 / 妊娠 / 経会陰3D超音波 / 挙筋裂孔 / 骨盤底筋 / 経会陰超音波 / 骨盤底障害 / 経会陰超音波法 / 産後 / 産褥 / 下部尿路障害

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.

Research Products

• [Presentation] 経会陰3D超音波測定法による初産婦の妊娠末期の挙筋裂孔と年齢との関連 (2017)
  • Author(s): 芦田沙矢香、春名めぐみ、坂巻健、後藤美希、小林浩一
  • Organizer: 第90回日本超音波医学会学術集会
  • Place of Presentation: 栃木県総合文化センター（栃木県、宇都宮市）
  • Year and Date: 2017-05-26
• [Presentation] Relationships between exercise in third trimester and levator hiatus measured by three-dimensional ultrasonography: A cross sectional study (2017)
  • Author(s): Ashida, S., Haruna, M., Matsuzaki, M., Sasagawa E.
  • Organizer: 20th East Asian Forum Of Nursing Scholars.
  • Place of Presentation: Regal Riverside Hotel, Hong Kong, China
  • Year and Date: 2017-03-09
  • Int'l Joint Research