Blood sugar value measuring method and apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Nov 21, 2000
Grant Date -
N/A
app pub date -
May 19, 1999
filing date -
Dec 25, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Near infrared rays of .lambda.1, .lambda.2, .lambda.3 in wavelength which are different from and near to one another are irradiated from a light source (2) to a part being measured (F) of a living body in such a state that vein bloodstream at the part being measured is stopped by applying a press force of a cuff (8), and the intensities of the transmitted near infrared rays of .lambda., .lambda.2, .lambda.3 in wavelength are detected by a photodetector (4) at the same time. In a processing circuit (14), the absorbance secondary differential value of the near infrared rays by the part being measured (F) is calculated on the basis of the transmitted light intensity detection values thus detected at the same time with respect to the three wavelengths, the variation width thereof within a predetermined time is calculated and then the blood sugar value in the living body is determined from the absorbance secondary differential value variation width on the basis of a calibration curve.
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