Cooley Renal Artery ClampDDP Elite USA Cooley Renal Artery clamp is ideally suited for use in cardiothoracic surgeries. The slightly curved shanks and angled jaws make this clamp perfect for its ideal use which is as a renal clamp to fully or partially cause occlusion of the renal vessels. These jaws are atraumatic thus reducing injury and stress to the vessel walls while still remaining firmly in their affixed location. This instrument is available in three sizes: 7. 25", 7.