Patent ID: 9155648
Filing Date: 2015-10-13
Classification: A61F,A61M

Abstract:
1. A method for placing a stent at a target site in a living body comprising: inserting a distal end of a hollow shaft of a stent delivery system into the lumen of a living body, the stent delivery system also comprising first and second axially spaced apart expandable balloons arranged around a distal portion of the shaft, a third expandable balloon arranged around the shaft, and a stent arranged around the second balloon to expand together with expansion of the second balloon; moving the shaft to position the first balloon at a target site in the lumen of the living body; expanding the first balloon; delivering to the target site a drug which at least inhibits proliferation of endothelial cells, the drug being delivered to the target site by way of the expanded first balloon while the first balloon is positioned at the target site; collapsing the first balloon; moving the shaft after collapsing the first balloon to position the stent at the target site at which the drug was delivered; expanding the second balloon to expand the stent so that the stent comes into contact with a surface of the target site; collapsing the second balloon; after collapsing the second balloon, moving the shaft to position the third balloon at the target site at which is located the stent; expanding the third balloon so that the third balloon contacts the stent and applies an outward expansion force to the stent; and withdrawing the shaft, together with the first and second balloons, from the body lumen of the living body while the stent remains in contact with the surface of the target site.