P23.11: Prenatal diagnosis of small bowel obstruction with ultrasonography and MRI

Abstract

To evaluate the value of ultrasonography and magnetic resonance imaging in the diagnosis of fetal small bowel obsrtuction. 14 fetus with “double bubble” sign or dilated small bowel were included in this study. MRI was used to analyze the location of the obstruction and the visibility of the colon and rectum. The final diagnosis was based on postnatal or fetal pathological examination. With ultrasonography, 6 fetus showed classic “double bubble” sign, and the other 8 fetus showed vary degrees of dilated small bowel. 10 of them were associated with polyhydramnions, while 4 of them were associated with normal amniotic fluid volume. With MR, the “double bubble” sign were confirmed in 7 fetus. Besides, MR precisely determined the site of occlusion, such as superior part, descending part, horizontal part or ascending part. The postatretic bowel were also clearly displayed by MRI. MRI are good complementary tools to prenatal ultrasonography for identifying small bowel obstruction. MRI could assess the location of the obstruction and the postatretic bowel.