615 Cases with Foreign Bodies in the Esophagus and the Bronchotracheal Tree during the Last 10 Years-As Statistical Analysis Gathered from the Departments of ENT of 7 Universities in the Tokai Area in Japan

434 cases (216 males and 218 females) of esophagus and 182 cases (118 males and 64 females) of broncho-tracheal foreign bodies gathered from the ENT departments of 7 universities located in the Tokai area of Japan were statistically analyzed during past 10 years. As esophageal foreign bodies, PTP (35.1%) ranked first, followed by coins (24.0%), peaces of meat (10.9%), and fish bones (10.0%). In regard to broncho-tracheal foreign bodies, 75.1% of all cases were under 3-year-olds patients. Transluscent foreign bodies were found in 86.3% of all cases. The foreign bodies were beans in 68.1% of all cases, followed by artifical teeth in 11.5%. The foreign bodies were lodged in the right bronchas with the same frequency as in the left. In this study, PTP foreign bodies have occurred most often in the esophagus recently, and the discussed the prevention of PTP foreign bodies in this paper.