Microsurgical dilatation is indicated for the treatment of lesions in hemodialysis access management (HAM). This innovative technique uses microsurgical blades, mounted to the surface of the balloon, to score a lesion in a uniform manner. By scoring the lesion before and during balloon dilatation, the hyperplasia (tissue overgrowth) that is commonly associated with angioplasty can be reduced and the vessel can be expanded in a manner that is both uniform and precise.