Patent ID: 6816741
Filing Date: 2004-11-09
Classification: A61B

Abstract:
A processor capable of analyzing signals received from a light-sensitive detector that detects light having a plurality of wavelengths transmitted through body tissue carrying pulsing blood, the processor comprising:a first module capable of identifying physiologically acceptable pulses within a plethysmograph waveform comprised of one or more signals received from a light-sensitive detector that detects light having a plurality of wavelengths transmitted through body tissue carrying pulsing blood; and a second module capable of computing a plurality of statistics regarding said physiologically acceptable pulses identified by said first module, wherein said first module comprises a component that identifies edges within said plethysmograph waveform, wherein each of said edges comprises a first end point at a peak of said waveform and a second end point at a subsequent valley of said waveform, and wherein said first module comprises a component that disregards ones of said edges that do not cross zero.