The Maternal and Child Health Hospital of Changde city, Changde, 415000, China.
The Maternal and Child Health Hospital of Taoyuan city, Taoyuan, 415700, China.
BMC Pregnancy Childbirth. 2020 Jul 3;20(1):387. doi: 10.1186/s12884-020-03078-5.
The purpose of this research is to summarize the prenatal ultrasound characteristics of congenital duodenal obstruction (CDO), especially in the diagnosis of duodenal diaphragm and annular pancreas. At present, few researchers have summarized the specific ultrasound features of duodenal diaphragm and annular pancreas.
In this study, a retrospective analysis of 40 patients diagnosed with CDO between January 2016 and December 2019 was carried out. Data on the diagnosis, ultrasound images and outcomes of the patients were gathered, and the features of the patients were analyzed.
The results showed that there were 17 patients (42.5%) of congenital duodenal diaphragm, all with a 'rat tail' sign on the ultrasound images. Moreover, there were 4 patients (10.0%) of CDO caused by annular pancreas, all with a 'pliers' sign on the ultrasound images. We summarized the imaging features of the 'rat tail' sign and the 'pliers' sign.
The main conclusion of this study was that the 'rat tail' sign could be used as an indirect ultrasound feature to diagnose duodenal diaphragm. The 'pliers' sign could be used as a direct ultrasound feature in the diagnosis of annular pancreas in CDO.
本研究旨在总结先天性十二指肠梗阻（CDO）的产前超声特征，特别是在十二指肠隔膜和环状胰腺的诊断方面。目前，很少有研究总结十二指肠隔膜和环状胰腺的具体超声特征。
本研究对 2016 年 1 月至 2019 年 12 月期间诊断为 CDO 的 40 例患者进行了回顾性分析。收集了患者的诊断、超声图像和结果数据，并对患者的特征进行了分析。
结果显示，有 17 例（42.5%）患者为先天性十二指肠隔膜，超声图像均显示“鼠尾征”。此外，有 4 例（10.0%）患者为环状胰腺引起的 CDO，超声图像均显示“钳子征”。我们总结了“鼠尾征”和“钳子征”的影像学特征。
本研究的主要结论是“鼠尾征”可作为间接超声特征用于诊断十二指肠隔膜。“钳子征”可作为 CDO 中环状胰腺的直接超声特征。
