Bio-optical modeling of human skin to eliminate the skin structure variability in blood pressure measurement

This paper presents a simulation model to quantify the amount of light intensity dissipated by the skin and its underlying layers. The model will be useful to eliminate the skin structure variability issue in the blood pressure measurement system. In the visible spectral region, the absorption & scattering properties of skin tissues are estimated by taking into account the spatial distribution of water, melanin, blood & bilirubin content within each distinct anatomical layer. Combining this bio-optical model with advanced radiative transfer theory, a hybrid model has been simulated to represent the transmission of light through the skin. This simulation model will be able to quantify the dissipated light intensity for different types of skin in PPG based blood pressure measurement system. In the results, graphical analysis of different types of human skin responses with respect to the light of different wavelengths, incident angle & intensities have been revealed.