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目的：探究B超检测妊娠晚期子宫下段厚度准确性。方法：回顾性分析我院2014年3月至2015年2月收治的100例产妇病例资料，按照是否有手术史将其分为观察组（62例）和对照组（38例），术前均行B超检查并在术后对子宫下段厚度进行测量，比较二者结果差别。结果：与术前B超检查结果比较，两组产妇术中实际测量的子宫下段厚度结果比较差异并无统计学意义（P＞0.05）；观察组术前B超检查和术中实际测量的子宫下段厚度均大于对照组，组间比较差异均具有显著性（P＜0.05）。观察组有2例产妇术前B超检查未见瘢痕异常情况，术中发现1例肌层不完全裂开，1例完全裂开。结论：分娩前期行B超检测，可获悉子宫下段厚度的大致情况，其中有剖宫产史病例的子宫下段厚度普遍较薄。
Objective: To explore the accuracy of ultrasonography in detecting the thickness of lower uterine segment in late pregnancy. Methods: A retrospective analysis of 100 cases of maternal cases admitted from March 2014 to February 2015 in our hospital was divided into observation group (62 cases) and control group (38 cases) according to the presence or absence of surgery. Preoperative Line B ultrasound examination and measurement of the thickness of the lower uterine segment after surgery, the difference between the two results. Results: There was no significant difference in the thickness of the lower uterine segment between the two groups (P> 0.05). Compared with preoperative B-mode ultrasonography and actual intrauterine measurement of the uterus The thickness of the lower segment was larger than that of the control group, with significant difference between the two groups (P <0.05). In the observation group, there were 2 cases of maternal preoperative B-ultrasound without scar abnormalities. One case of muscular layer was found to be incompletely dissected and 1 case completely ruptured. Conclusion: Early B-line detection of childbirth, can be informed of the approximate thickness of the lower uterine segment, including the history of cesarean section, the lower uterine thickness is generally thin.