Abstract: An apparatus includes two clamp assemblies on opposing sides of an operating table. A cross bar is attached to the assemblies and extends across a lowered leg section of the table. A pivot joint is coupled to the cross bar, a first linkage couples the pivot joint to a first ball joint, a second linkage couples the first ball joint to a second ball joint, and a medical device is coupled to the second ball joint through an adapter. Each joint has a spring mechanism resisting its movement and a hydraulic cylinder to allow its movement. Depression of a foot pedal actuates all hydraulic cylinders so that an operator may position the medical device by moving the pivot joint and attached first linkage rotationally about and directionally along the cross bar, the second linkage rotationally about the first ball joint, and the medical device rotationally about the second ball joint.