Patent ID: 6141572
Filing Date: 2000-10-31
Classification: A61B

Abstract:
A method, for simultaneous simulation of arterial and non-arterial tissue oxygenation which is to be monitored by a pulse oximeter that provides red and infra-red light flashes, comprising:a) taking as inputs: 1) the oximeter's light flashes; 2) a first waveform representative of fluctuating arterial attenuation of an optical path through tissue; and 3) a second waveform representative of fluctuating non-arterial attenuation of an optical path through tissue, andb) combining said light flashes, said first waveform and said second waveform such that the result is pulses which are amplitude modulated by both said first and second waveforms, whereby said pulse amplitude modulated pulses can be applied to an oximeter for interpretation as attenuations of its light flashes by arterial and non-arterial oxygenated tissue.