Objective:To study the clinic value of ultrasound in detecting the pathogen of postcholecystectomy syndrome.Methods:The ultrasonograms of 301 patients were reviewed

who had their gallbladder cut or common bile duct explored(because of gallstone or other diseases) and still had some clinic symptoms after operation such as abdominal pain

dyspepsia

infection or obstruction of bile duct.Results:Among 301 cases

66 cases(21.93%) showed normal ultrasonograms and 253 cases(78.07%) showed abnormal ultrasonograms of liver or bile duct.Namely:1.156 cases with light simplex choledochectasia(51.82%);2.54 cases with light simplex choledochectasia and intrahepatic duct dilation(17.94%);3.23 cases with choledochectasia and abnormal anechoic area instead of cholecyst image(6.64%).4.1 case with choledochectasia and calculus of intrahepatic duct(0.33%);5.1 case with apparent choledochectasia and calculus of the lower part of common bile duct(0.33%).Conclusion:Ultrasound has higher clinic value in detecting the pathogen of postcholecystectomy syndrome.