The authors reported the results of respiratory and excretory functions of the trachea in a case, inn which end to end anastomosis after annular excision of the stenotic trachea was performed and a polyethylene tube was retained in the trachea for 17 months. The results of spirometry and blood gas analysis were all normal before and after the extubation. To examine the excretory function, 15ml of Dionosil was injected into the trachea and disappearance of the contrast medium was observed successfully. The contrast medium was excreted smoothly through the outside of the tube by ciliary action of the tracheal mucous epithelium. It is concluded that retaining of a tube in the trachea is not so harmful and rather useful for prevention of the recurrent stenosis. By this experience, a case of tracheal stenosis due to tuberculosis was treated successfully with the same technique. And its clinical data were reported together with in this paper.
