1　临床资料患者 ,男 2 6岁 ,装修工人 (有口衔铁钉工作的习惯 )。不慎吞入 1枚铁钉伴胸骨后疼痛不适 1ｈ入院 ,无咳嗽、咳痰等。Ｘ线透视见相当于第 2胸椎水平一长约 3ｃｍ不透Ｘ线之金属钉子影。结合病史 ,诊断为上段食管内金属 (铁钉 )异物存留 (图 1)。2　器械和方法2 .1　 1 clinical data patients, male 26 years old, renovation workers (there is the habit of the work of the mouth iron nails). Inadvertently swallowed an iron nails with sternal pain after 1h admission, no cough, sputum and so on. X-ray see the equivalent of the second thoracic level of about 3cm radiographs of metal nail shadow. Combined with medical history, diagnosis of upper esophageal metal (nail) foreign body retention (Figure 1). 2 instruments and methods 2 .1