1消化系统畸形的超声诊断消化道畸形是严重的先天性畸形,其中比较常见的有食管闭锁,十二指肠狭窄或闭锁,小肠梗阻和结肠梗阻。梗阻部位越高,声像图改变出现得越早,越典型,如十二指肠狭窄或闭锁,产前超声就比较容易明确诊断;小肠梗阻在孕24周后才能做出诊断;而结肠梗阻有时并不? A digestive system ultrasound diagnosis of gastrointestinal malformations is a serious congenital malformations, of which are more common esophageal atresia, duodenal stenosis or atresia, intestinal obstruction and colon obstruction. The higher the site of obstruction, the earlier the sonography changes, the more typical, such as duodenal stenosis or atresia, prenatal ultrasound is relatively easy to make a definite diagnosis; small bowel obstruction in 24 weeks after pregnancy can make a diagnosis; and colon obstruction Sometimes not?