[Tc99m pertechnetate in the study of gastric function].

The authors explored the gastric function of 20 volunteers by classical methods and by the assessment of gastric 99Tc pertechnetate clearance. From a comparison of results obtained with the various methods they come to the conclusion that the pertechnetate clearance method is dependable, easy to perform, and noninvasive; accordingly, they recommend its use as the method of choice for monitoring the treatment of duodenal ulcers and evaluating its results.