A NON-INVASIVE METHOD AND DEVICE FOR THE MEASUREMENT OF OXYGEN SATURATION IN ARTERIAL BLOOD

摘要

ABSTRACT A method for the non-invasive measurement of oxygen saturation in arterial blood comprising the steps of exposing a part of the patient's body to R and IR light; detection of these lights on exiting the body part by photo diode circuits; normalizing the R and IR PPGs; removing the noise in the R and IR PPGs, by filters, to obtain signals vR and vIR; obtaining the natural logarithm of vR and vIR to get ln(vR) and ln(yIR), and the peak amplitudes of ln( VR ) and ln(vM)? that is, VpR and Vpm and obtaining the oxygen saturation Sp02 as