Endoscopic evaluation at follow-up after Björk tracheostoma.

Fifty-six patients who had had tracheostomy of modified Björk type underwent follow-up examination with tracheal X-ray and endoscopy. In six patients the tracheal lumen was narrowed by one-fourth to one-half. No treatment was required in any case. Endoscopy seems to be the simplest and most reliable method for judging the degree of tracheal stenosis.