Patent ID: 7774037

Claim:
A method for measuring blood oxygen saturation in blood of a patient, comprising: placing against a body part of the patient an apparatus for non-invasive measurement of at least one analyte in the blood in the body part of the patient; transmitting light via a set of one or more light transmitting fibers to the body part of the patient; detecting light transmitted from, or reflected through, the body part of the patient via a set of one or more light detector fibers; determining a measurement of at least one analyte in the blood utilizing a non-pulsatile element of the blood; and measuring blood oxygen saturation (SO 2 ) using the equation: SO 2 =100*(OXI+0.43)/1.5, wherein, OXI is the oxygenation index of the blood and is defined by the equation: OXI=[( e−d )/11.7−( d−c )/11.6]*100/HbI, wherein, HbI is the hemoglobin index of the blood and is defined by the equation: HbI=[( b−a )/27.1+( c−b )/21.4+( c−e )/23.3+( c−f )/13.6]*100, and wherein: a=absorption value at a first wavelength of light; b=absorption value at a second wavelength of light; c=absorption value at a third wavelength of light; d=absorption value at a fourth wavelength of light; e=absorption value at a fifth wavelength of light; and f=absorption value at a sixth wavelength of light, and wherein: the sixth wavelength of light is greater than the fifth wavelength of light; the fifth wavelength of light is greater than the fourth wavelength of light; the fourth wavelength of light is greater than the third wavelength of light; the third wavelength of light is greater than the second wavelength of light; and the second wavelength of light is greater than the first wavelength of light.