“…Several authors have described their experience with different types of stents. These experiences include silicon stents [4], self-expanding covered stents (PoliflexRush) [5,6], retrievable covered self-expanding metal stents designed for tracheobronchial use [7], polytetrafluorethylene stents [8], and self-expandable biodegradable stents [9]. Stents could have 2 different mechanisms of action.…”