The Image Processing Unit EX-0 is an optional module intended for use as an adjunctive monitor of the hemoglobin oxygen saturation of blood in superficial tissue of the endoscopic observation image area in patients at risk for ischemic states.This product may be used on all patients requiring endoscopic examination when using a Fujinon/FUJIFILM medical endoscope, video processor and light source together with monitor, recorder and various peripheral devices.The prospective clinical value of measurements made with OXEI has not been demonstrated in disease states.