The present paper deals with the autoscopic change findings of trachea and bronchi following to tracheotomy, in 14 cases of lepromatous leprosy patients.
1) The pathological findings of trachea were influenced by the tracheotomy in all cases.
2) After treatment of leprosy with Promin and other Sulfon drugs, ulcer of trachea was healed, but scar and symptoms of chronic bronchitis were not quite improved.
3) The stenosis of left bronchi was observed in 2 cases due to mis-treatments.
4) By the treatment of less than two years with Promin, 5 patients became to be able to remove the tubes.
As for the sensitivity of tracheal mucous membrane, the author studied this problem by causing cough-reflex by means of application of mechanical stimuli upon various parts of tracheal mucous membrane. Results were as follows:
1) Degrees of cough-reflex run parallel to the condition of illness and leprous changes of trachea.
2) The reflex became proportionately stronger as the stimulus reached the deeper parts of trachea.
3) The prognosis did not relate with the fall of the cough-reflex.
4) Recovery of the reflex was not obtained by the administration of Promin.
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