A physiological monitor for determining blood oxygen saturation of a medical patient includes a sensor, a signal processor and a display. The sensor includes at least three light emitting diodes. Each light emitting diode is adapted to emit light of a different wavelength. The sensor also includes a...http://www.google.com.au/patents/US20080154104?utm_source=gb-gplus-sharePatent US20080154104 - Multi-Wavelength Physiological Monitor
