Patent ID: 9521969
Filing Date: 2016-12-20
CPC Classification: A61B

Claim Text:
1. A biological signal measuring system comprising: a light emitter which is configured to emit a first light beam having a first wavelength, and a second light beam having a second wavelength; a light receiver which is configured to output first and second signals respectively in accordance with received light intensities of the first and second light beams that have been passed through or reflected from a living tissue of a subject; a first calculating section which is configured to acquire a light attenuation of the first light beam based on the first signal, and a light attenuation of the second light beam based on the second signal; a second calculating section which is configured to acquire a blood-derived light attenuation based on the light attenuation of the first light beam, and the light attenuation of the second light beam; a third calculating section which is configured to identify a blood fill time for filling the living tissue, based on a temporal change of the blood-derived light attenuation associated with pressurization of the living tissue; and an outputting section which is configured to output the identified blood fill time, wherein the blood fill time is defined as a time period elapsing from a release of pressurization of the living tissue until the blood-derived light attenuation reaches a predetermined threshold.