目的 探讨腔内彩色多普勒超声在剖宫产术后子宫下段切口妊娠诊断中的应用价值。方法 收集34例剖宫产后子宫下段切口妊娠患者的临床资料，分析其腔内彩色多普勒超声声像图特征，主要观察子宫前壁峡部的异常回声，了解其形态、大小、与切口的关系及局部血流情况。结果 34例均经腔内彩色多普勒超声检查明确诊断；其中20例显示子宫前壁下段切口处见孕囊，14例显示子宫前壁下段混合回声区。结论 腔内彩色多普勒超声检查是早期诊断子宫下段剖宫产切口妊娠的有效方法。

Objective To investigate the application of transvaginal color Doppler ultrasonography in the diagnosis of pregnancy at the incision of lower segment cesarean section. Methods The clinical data of 34 patients with pregnancy at the incision of lower segment cesarean section were collected. The imaging characteristics of transvaginal color Doppler ultrasonography was analysed. The abnormal echoes of the isthmus of anterior wall of the uterus were observed, and the relationship among its shape, size, incision and local blood flow was explored. Results The diagnosis of all the 34 patients were confirmed by transvaginal color Doppler ultrasonography. In 20 patients, the yolk sacs were detected at the incision of lower segment cesarean section of the anterior wall of the uterus, and hybrid echoes were observed on lower part of uterus in the other 14 patients. Conclusion Transvaginal color Doppler ultrasonography is a very effective method for diagnosis of pregnancy at the incision of lower segment cesarean section.