Masimo is a breakthrough, noninvasive blood constituent patient monitoring platform. Masimo rainbow^® SET Pulse CO-Oximetry^TM technology combines the latest in system theory, adaptive signal processing and a revolutionary sensor that employs 7+ wavelengths of light to collect and analyze an extraordinarily rich stream of physiological data. Sophisticated processing of this data permits rainbow SET's unique ability to accurately measure carbon monoxide (SpCO^TM), methemoglobin (SpMet^TM) levels in the blood in addition to pleth variability index (PVI) and pulse rate.