Patent ID: 7025728
Filing Date: 2006-04-11
Classification: A61B

Abstract:
1. A method of processing an observed pulse wave data, comprising steps of: irradiating a living body with a first light beam having a first wavelength and a second light beam having a second wavelength which is different from the first wavelength; converting the first light beam and the second light beam, which have been reflected or transmitted from the living body, into a first electric signal corresponding to the first wavelength and a second electric signal corresponding to the second wavelength, as the observed pulse wave data; dividing a frequency band of the observed pulse wave data into a plurality of frequency ranges; computing a light absorbance ratio obtained from the first electric signal and the second electric signal, for each one of the divided frequency ranges; and determining that noise is not mixed into the observed pulse wave data in a case where a substantial match exists among light absorbance ratios computed for the respective frequency ranges.