Method and apparatus for rapid non-invasive determination of blood composition parameters

摘要

PCT No. PCT/HU96/00028 Sec. 371 Date Nov. 24, 1997 Sec. 102(e) Date Nov. 24, 1997 PCT Filed May 21, 1996 PCT Pub. No. WO96/37259 PCT Pub. Date Nov. 28, 1996A method and apparatus for rapid non-invasive determination of blood composition parameters. A blood-containing body part of a live organism is irradiated with electromagnetic radiation of near-infrared wavelength range. Spectrum values of the radiation transmitted through and reflected by the body part are measured. One or more unknown values of blood composition parameters are determined on the basis of the measured values. The transmittance spectrum of the body part is measured at several wavelengths in a first wavelength range from 700 nm to a value between 1000 and 1100 nm. The reflectance and/or interactance spectrum of the body pat is measured at several wavelengths in a second range from the value between 1000 and 1100 nm to 1800 nm. The unknown values of blood composition parameters are determined on the basis of a single spectrum including spectrum values of said transmittance spectrum and spectrum values of said reflectance and/or interactive spectrum.