Abstract
The water syphon test is a simple and easily performed method for demonstrating gastro-oesophageal reflux with a high degree of reliability. It is carried out following a conventional barium swallow. Compared with clinical findings and oesophageal manometry, the water syphon test is very reliable for demonstrating gastro-oesophageal reflux during childhood. Prolonged irradiation in order to see spontaneous reflux becomes unnecessary. This results in a significant reduction in radiation dose. Barium swallow and the water syphon test are the most useful initial examinations in children with symptoms which suggest reflux.

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