DURING roentgenoscopy of the esophagus in newborn infants, with use of iodized oil, we frequently observed the presence of the oil in the trachea and the bronchial tree. This finding in apparently normal infants could conceivably be confusing in the diagnosis of abnormalities of the laryngoesophageal region. Concern about this phenomenon prompted us to carry out further studies.
METHODS AND MATERIAL
The group consisted of 100 healthy newborn infants in ages ranging from 12 to 24 hours. They were examined in the supine position with a standard fluoroscopic-roentgenographic unit; those studied within the first 12 postnatal hours received no feeding of any kind. After a preliminary roentgenoscopic survey of chest and abdomen, the infants were fed varying amounts of chloriodized oil (iodochlorol®) warmed to body temperature, a standard feeding bottle and nipple being used. The act of swallowing was carefully observed, and the opaque medium was followed to the stomach.