#$%^&*AU2015255298B220161020.pdf#####ABSTRACT A method of treating a site in a body lumen using a medical device comprising: (a) an elongated tubular body with a proximal and distal end； (b) at least one expandable element at the distal end of the elongated tubular body； and (c) an expandable tubular sleeve surrounding at least a portion of the expandable element, said expandable tubular sleeve comprising a single polymeric material and having at least a first portion compressed to a first longitudinal compression ratio and having a first radial strength and a second portion compressed to a second longitudinal compression ratio which differs from the first longitudinal compression ratio and having a second radial strength which differs from the first radial strength, wherein the entire first portion and the entire second portion comprise a single, uniform wall thickness prior to expansion, and wherein the differing first and second radial strengths influence the rate of expansion of the expandable element. The method comprising the steps of: positioning within a body lumen the medical device so that the expandable element in folded form is adjacent to a treatment site； and expanding the expandable element at a pressure or force sufficient to expand the expandable element at a first portion of the expandable tubular sleeve. 7119308_1 (GHMatters) P95840.AU.12/3 104 300 104 304 306 302 FIG. 3 306 FIG. 4 104 300 304 306 302 FIG. 5
