Abstract: Objective To investigate the value of the application of the catheter dilatation in the serious bronchuostenosis. Methods Fifteen cases of serious bronchostenosis were selected by branchofiberoscopy.The dilatation catheter used was produced by ENDO-FLEX Gmbh.Germany.The type was Fr.5/3.After catheter dilatation,stenosis bronchus was infused with isoniazid(100 mg),amikacin(100 mg),dexamethasone(2 mg).The changes of bronchial lumen and X-ray chest photography after every dilatation was dynamically observed with branchofiberoscopy. Results After catheter dilatation,douche and drug infusion,the temperature of 3 cases with high fever has come down.,2 cases with atelectasis was recovered,1 case with repeated hemoptysis was recovered.After 8 weeks,8 out of 15 cases still maintained the bronchial lumen diameter above Fr.5,the bronchial lumen of 6 cases was completely obturated.1 case repeatedly attacked.Pulmonary tuberculosis focus and obstructive infection focus were improved in 15 cases.The cavity was absorbed in 3 cases.Lab examinations showed that 12 cases were converted negative in both sputum smear examination and rapid culture.After 12 weeks,8 out of 15 cases still maintained the bronchial lumen diameter above Fr.5,the bronchial lumen of 7 cases was completely obturated.The cavity was absorbed in 5 cases.1 case did not change,1 case had atelectasis in the top left part of the lung. Conclusion Catheter dilatation could distend the diameter of stenosis bronchial lumen from less than 1mm to more than 3mm,eliminate the pus,pump out the pus from the deep lumen by means of catheter and branchofiberoscope,and infuse anti-tuberculosis drugs.It could alleviate the clinical symptoms and make more chance of dilatation with saccule.

Key words: Bronchial diseases, Constriction,pathologic, Balloon dilatation