A medical device may include an inflatable balloon secured to a distal region of a catheter shaft. A blade assembly may extend over and be secured to the inflatable balloon. The blade assembly may include a plurality of blades and at least two rings that are adapted to secure each of the plurality of blades. Each of the rings include an inner surface adapted to be secured to the inflatable balloon and an outer surface. A number of living hinges are formed within the inner surface and the outer surface that cooperate to allow the blade assembly to move between an expanded configuration and a collapsed configuration.