[Evaluation of a new cholecystokinetic agent].

Boyden's test meal (egg yolk beaten with cream), used during cholecystography, remains in the stomach for a long time and could interfere with the radiological findings on barium meal examination performed after cholecystography. A new preparation based on corn oil emulsion (G.P. Prep) was evaluated in 33 patients with and without symptoms of gallbladder disease. The criteria used in the evaluation of results were three: reduction in the gallbladder dimensions, variations in the cholecystovertebral angle, and visualization of the extrahepatic bile ducts. The gallbladder dimensions were determined before and after contraction with the aid of a metallic perforated ruler (Colcher's) placed at the estimated level of the gallbladder at the time of exposure.