Before making a search for a suspected foreign body in the esophagus, it is always advisable to employ the roentgen ray as an aid to diagnosis. A radiopaque foreign body of any size is usually easily demonstrable, but nonopaque bodies present certain difficulties. The usual technic in demonstrating the presence of nonopaque bodies is to have the patient swallow barium in a suspension, or in a capsule which may become arrested above the intruder. In the subsequent search with the esophagoscope, the barium is frequently seen to form a pool above the foreign body, obscuring the latter. It requires considerable time and effort to remove the barium before the foreign body can be fully exposed to view.
Recently, I have employed iodized oil instead of barium in several cases to determine the presence of a nonopaque foreign body in the esophagus and have found that it has certain advantages which
IGLAUER S. NONOPAQUE FOREIGN BODIES IN THE ESOPHAGUS AND ESOPHAGOTRACHEAL FISTULA: THEIR DEMONSTRATION BY INGESTED IODIZED OIL. Arch Otolaryngol. 1928;7(3):229–233. doi:10.1001/archotol.1928.00620010245002
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