Cardiovascular Systems Inc. announced that it has received U.S. Food and Drug Administration (FDA) clearance for the 4 French, 1.25 Solid Diamondback 360 Peripheral Orbital Atherectomy System (OAS) for the treatment of peripheral artery disease (PAD). Specifically, the clearance covers the company’s 145-cm-long 1.25mm Diamondback 360 Solid Crown, 4 Fr sheath compatible and the Modified 1.25mm Diamondback 360 Micro Crown, 4 Fr sheath compatible.