RESUMO
Objective To evaluate the clinical significance of high frequency ultrasound in the diagnosis of duodenal obstruction in neonates.Methods Ultrasonography,clinical data and etiological diagnoses of the operation in 113 neonates with duodenal obstruction were reviewed retrospectively.The digestive tract,including stomach,duodenum,jejunoileum and colon,were examined in all patients with 8-12 MHz linear transducer before operation.Results In the 113 neonates with duodenal obstruction,63 cases were diagnosed intestinal malrotation,31 cases duodenal stenosis,14 cases annular pancreas,and 5 cases duodenal atresia.One hundred and six cases were diagnosed as duodenal obstruction by ultrasound,of which intestinal malrotation in 61 cases,duodenal stenosis in 29 cases,duodenal atresia in 4 cases,and annular pancreas in 12 cases.The diagnostic rate was 93.81% (106/113 cases),96.83% (61/63 cases),93.55% (29/31 cases),80.00% (4/5cases) and 85.71% (12/14 cases),respectively.The location of obstruction diagnosed by ultrasound was coincident with the operation in 92 cases,with a diagnostic rate of 81.42%(92/113).Conclusions High frequency ultrasound plays an important role in diagnosing the causes and location of duodenal obstruction.It can be used as the first choice of examinal methods for the neonates with duodenal obstruction.