Before cholangioscopy examination residual stone rate of intrahepatic duct stone and extrahepatic duct stone operation was 94% and 15% respectively.

• 结果显示,应用常规方法取石,肝内、肝外胆管结石的残石率分别为94%25与15%25,术中行胆道镜取石后,残石率分别降至19%25与4%25。