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A method was devised to calculate individual kidney function by injecting 99m technetiutn-diethylenetriamine pentaacetic acid, gluconate, or glucoheptonate intravenously and to determine the radioactive uptake by and the contribution of each kidney to total renal function. The accuracy of the method was tested in 13 patients by comparing the results of the differential kidney scan with individual kidney creatinine clearance measurements. The method is applied practically combined with a total twenty-four-hour creatinine clearance test, which allows us to ascribe individual creatinine clearance values to each kidney.

Summary This paper reviews 15 patients with severe, persistent stenosis after repair of tracheoesophageal fistula and esophageal atresia over a 15-yr period 1958–1973. These obstinate stenoses could be secondary to gastroesophageal reflux, which seems to cause inflammation and undue cicatrization at the site of the anastomosis. Attempts at conservative management were not successful. In all 15 patients antireflux operations cured the stenoses.