Studies on the neutralization of gastric acidity: Ewald test meal and X-ray (barium meal) studies in patients with duodenal ulcer, gastro-jejunostomy and gastric resection

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1. Gastric studies of 25 patients were made by means of x-ray (after a barium meal), fractional Ewald test meals and neutralization curves of gastric acidity. The patients comprised those with x-ray evidence of ulcer, both with and without symptoms, those with symptoms of ulcer but with negative x-ray findings, and those with gastro-enterostomies and gastric resections.