Theoretical and quantitative analysis of cyanosis colouration in newborn

This paper investigate the occurrence of cyanosis's blue colouration in newborn babies with the focused on a detailed version of the oxyhaemoglobin's (HbO2) and deoxyhaemoglobin's (Hb) transmission and reflectance spectrum in the vessel. A quantitative analysis of cyanosis colour is based on the cyanotic skin observer model. The proposed method formed a basis work of colour changes to implement in the future cyanosis baby manikin for baby simulation. A series of transfer functions described by the relationship of the light propagation in human skin. Results showed that the colouration of HbO2 is less saturated compared to Hb and its depends on the HbO2's and Hb's reflectance spectrum in the blood. Meaning that, the correct International Commission on Illumination (CIE)L*a*b*colour values of cyanosis in real newborn babies will be quantified and later to be implemented in a baby manikin. Despite of non-experimental methodology implemented, it is based on putting together knowledge from literature. In particular, the database of the absorbance spectra of HbO2 and Hb and the three-cone pigments with different absorption spectra of the colour receptors in the human retina. The results of newborn's cyanosis colour was obtained and determined both in a two-dimensional International Commission on Illumination (CIE) 1931 xy and a three-dimensional CIE L*a*b*.