Clinical evaluation onsafety of stenting implantment in treatment of airway stenosis with two different typestents

Abstract

：Objective To evaluate the long-term safety of stenting therapyin the treatment of airway stenosis with stainless steel Z-stent and nitinol meshstent.Methods Thirty-three cases were treated with stainless steel Z-stent group.whileother 31 cases treated with nitinol mesh stent.At the time of 3,6 and 9 months afterstenting,bronchoseope were performed and the occurrence and extent of granuloma wererecorded.Results Varying degrees of granulation tissue hyperplasia were all observed in two groups.The occurrence of granuloma in stainless steelZ-stent group was far less than nitinol mesh stent group.Conclusions The difference ofoccurrence of granulation tissue hyperplasia between stainless steel Z-stent group andgranuloma nitinol mesh stent group are significant.Z-type stem is more suitable for thetreatment of benign tracheobronchial stenosis,however,nitinol mesh stent is adaptive formalignant tracheobronchial stenosis. Key words: Stent; Granuloma; Trachea