ABSTRACT Purpose: To identify an optimal self-expandable metallic stent (SEMS) and verify whether a mechanically superior SEMS would result in better clinical outcomes in the treatment of tracheal collapse. Methods: We selected three SEMS (n = 8 each). including an S-type stent with a wire diameter of 0. 006 inches (S6) and two D-type stents with wire diameters of 0. https://parisnaturalfoodes.shop/product-category/conditioner-sweet-pea/