[Oral cholecystosonography. A method to establish the diagnosis of minute cholesterol calculi].

We have studied five patients with clinical symptoms and/or ultrasonography with sludge-like irregularities, but not conclusive for gallstones. The layering of bile and floating of cholesterol gallstones induced manly by administration of oral cholecystographic contrast, has been well demonstrated since 1933. These 5 patients were given doses of iopanoic acid. The day after we performed other ultrasonography--oral cholecystosonography method. With this second cholecystosonography was demonstrated inside the gallbladder en layer or a line of hyperechogenic little floating spots of cholesterol gallstones.