Comparative analysis of the thickness of lower uterine segment of the anterior wall in late pregnancy measured by transvaginal ultrasound and uterine scar during operation
Objective To investigate the application of the thickness of lower uterine segment of the anterior wall in late pregnancy measured by transvaginal ultrasound in predicting uterine scar during cesarean section.Methods A total of 120 pregnant women with scarred uterus who received transvaginal ultrasonography for measuring the thickness of lower uterine segment of the anterior wall in late pregnancy and gave birth in the People's Hospital of Leshan from June 2019 to February 2022 were selected as the research subjects.According to the thickness of lower uterine segment of the anterior wall measured in late pregnancy,the subjects were divided into＜1.00 mm group,1.0-2.0 mm group and＞2.0 mm group,with 40 cases in each group.The three groups were compared on intraoperative scar condition and the thickness of lower uterine segment of the anterior wall in women with poor(grade Ⅱ,grade Ⅲ and grade Ⅳ)scar formation during operation.Results Of the 120 pregnant women,27 had poor uterine scar formation during operation.The proportions of poor uterine scar formation in the 1.0-2.0 mm group and the＞2.0 mm group were lower than that in the＜1.00 mm group(P＜0.05).The proportion of poor uterine scar formation in the＞2.0 mm group was lower than that in the 1.0-2.0 mm group(P＜0.05).The proportions of grade Ⅲ and grade Ⅳ uterine scar in the＜1.00 mm group and the 1.0-2.0 mm group were higher than those in the＞2.0 mm group.In the＜1.0 mm group,the proportion of intraoperative grade Ⅲ uterine scar was the highest.Pregnant women with grade Ⅳ uterine scar during operation had the thickness of lower uterine segment of the anterior wall smaller than 1 mm.The average thickness of lower uterine segment of the anterior wall in pregnant women with grade Ⅱ,grade Ⅲ,and grade Ⅳ uterine scar decreased in order(P＜0.05).Conclusion For pregnant women with thinner than 2 mm of lower uterine segment of the anterior wall measured by transvaginal ultrasound in late pregnancy,especially thinner than 1 mm,necessary measures should be taken in advance to prevent scar rupture.
ultrasonic measurementthe anterior wallthickness of lower uterine segmentlate pregnancy
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