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Comparison of radionuclide labelled test meals versus endoscopy in the preoperative assessment of the gastric outlet patency.

A series of 39 patients with peptic ulcer disease is investigated with respect to gastric outlet obstruction. Two diagnostic tools are compared, namely endoscopy and evaluation of radionuclide meal emptying. Endoscopic obstruction was qualified as non passage of a 14 mm gastroscope. Gastric emptying reduction was considered clinically relevant when half emptying times exceeded 60 minutes for solids and 12 minutes for liquids. Comparison of both techniques of radionuclide meal emptying with endoscopy showed a poor correlation (accuracy 15/28), especially when liquid gastric emptying versus endoscopy was concerned.