Volume 24, Issue 104, July - August, 2020

Transperineal ultrasound technique for evaluating angle of progression and predicting vagina delivery in Hung Vuong hospital, Vietnam

Hoang Thi Diem Tuyet¹, Huynh Nguyen Khanh Trang², Tran Thi Thanh Thuy¹, Ngo Minh Xuan², Huynh Quang Huy^2♦

¹Hung Vuong hospital of Obstetrics and Gynecology, Ho Chi Minh city, Vietnam
²Pham Ngoc Thach University of Medicine, Ho Chi Minh city, Vietnam

^♦Corresponding author
Department of Radiology, Pham Ngoc Thach Medical University, Ho Chi Minh City, Vietnam; Email: huyhq@pnt.edu.vn

ABSTRACT

Objective: To evaluate the sensitivity and specificity of a transperineal ultrasound technique for assessment of the angle of progression during labor. Methods: We carried out a diagnostic test study. Transperineal ultrasound in 375 pregnant women with an uncomplicated pregnancy, singleton, crown, a full month in the second stage of labor in Hung Vuong Hospital. Results: The angle of progression was more significant than or equal to 120 degrees on the transperineal ultrasound with sensitivity (96.5%), specificity (17.5%), PPV of 0.86, NPV of 0.47. The vaginal birth rate of ≥ 120 degrees is 96.2%. Correlation between transperineal ultrasonography on the pelvic floor of the uterus, mononuclear maturation, maturation, and crown with birth outcomes: progressive angle ≥ 120 degrees, has 1.66 times higher in vaginal delivery than the angle of progression was <120 degree, 95% CI [1.09 - 2.49]. The optimal progressive angle was 152 degrees with sensitivity, specificity for vaginal delivery was 50%, and 87.7% (Youden score). Conclusion: Transperineal ultrasound can help clinicians to evaluate the fetus head position during labor. More research is needed on this issue in the future.

Keywords: angle of progression, transperineal ultrasound, the second stage of labor, diagnostic test study.

Medical Science, 2020, 24(104), 2211-2216

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