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1. A method of making a balloon catheter comprising the steps of providing a balloon catheter having a central axis and an inflatable balloon; concentrically coupling a sleeve to the inflatable balloon, wherein the sleeve comprises a shape memory or superelastic material having a plurality of elongate slits passing through the sleeve defining elongate strut members between adjacent pairs of the plurality of elongate slits, the plurality of elongate slits assuming a substantially closed position when the inflatable balloon is in an uninflated state and assuming a substantially open position when the inflatable balloon is in an inflated state; wherein at least some of the elongate strut members are configured to at least partially rotate about their respective longitudinal axes and project radially outward relative to the central axis of the balloon catheter thereby forming an arcuate projection from a normal plane of the sleeve and then return to a substantially co-planar position in the normal plane of the sleeve when the inflatable balloon is in the uninflated state.
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