Abstract
PNEUMOPERITONEUM following the usually benign procedure of gastroscopy is so startling when it occurs that an additional report is believed to be of value. There have been only three previous reports of this condition. In the first, presented by Schiff1 in 1941, the only finding was subdiaphragmatic air at x-ray examination four days after the gastroscopy. In the case reported by Schindler2 in 1945, laparotomy was performed three hours after the onset of the pneumoperitoneum; methylene blue was injected into the gastric lumen, and oxygen blown into the stomach under a pressure of 60 pounds, but no perforation was found. . . .

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