気道異物の Check Valve 作用による心縦隔陰影の動態

抄録

A 1 year and 7 month old boy was referred from a pediatrician with cough and fever for one week. Although chest X-ray indicated no significant findings, feeble breath sounds were noted over the right chest on auscultation. A close fluoroscopic observation revealed an abnormal movement of the mediastinal shadow concomitantly with respiratory movements, which seemed indicative of the presence of a foreign body in the airway. Subsequent ventilation bronchoscopy disclosed a piece of peanut in the right main bronchus and a successful removal was performed.
A 16mm film made from a fluoroscopic videotape of the present case was analyzed and the abnormal movement of the mediastinal shadow was investigated as an evidence of the check valve action of the foreign body in the airway.