Patent ID: 8672919
Filing Date: 2014-03-18
Classification: A61B,A61M

Abstract:
1. A method for treating a stenosed vessel wall, comprising the steps of: (a) delivering a balloon catheter assembly to a target region, the balloon catheter assembly comprising a catheter shaft having a first inflation port and a second inflation port, a non-porous inner balloon in fluid communication with the first inflation port, the inner balloon being uninflated and having an outer surface with at least a portion of the outer surface pre-coated with a therapeutic agent, the balloon catheter assembly further comprising an outer balloon in fluid communication with the second inflation port, the outer balloon disposed over the inner balloon and being uninflated and spaced apart from the inner balloon by an annular lumen, the outer balloon having a porous structure; (b) with the balloon catheter assembly delivered to the target region, introducing a first fluid into the first inflation port to inflate the inner balloon; (c) prior to completing the inflation of the inner balloon, introducing a second fluid into the second inflation port to entrain the therapeutic agent coated on the outer surface of the inner balloon; (d) eluting the therapeutic agent with the second fluid through the pores of the outer surface of the outer balloon porous structure.