Optical investigation of variability in body region dependent transcutaneous oxygen saturation

International Engineering Research and Innovation Symposium

Philimon, Sheena P.^1 ; Huong, Audrey K.C.^1 ; Hafizah, W.M.^1 ; Ong, P.E.^1 ; Ngu, Xavier T.I.^1

Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Malaysia^1

关键词: Attenuation data;    Extinction coefficients;    Multi-spectral imaging systems;    Optical investigation;    Oxygen saturation;    Priori knowledge;    Reflectance data;    Wavelength ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/160/1/012089/pdf
DOI  :  10.1088/1757-899X/160/1/012089

来源: IOP

【 摘 要 】

This paper presents the use of multispectral imaging system to investigate variability in transcutaneous oxygen saturation (StO2) amongst different individuals and at different skin sites. Noncontact reflectance data are collected from central forehead, posterior forearm, thenar region of palm and proximal ankle of three healthy Asians. The prediction of the required StO2value is via fitting Extended Modified Lambert (EMLB) model to the measured attenuation data using extinction coefficient of hemoglobin components in the wavelength range of 520 - 600 nm as its priori knowledge. The obtained results revealed a relatively high mean StO2of 54 ± 1.9% at the palm of the hand site. This is followed by measurement at foot ankle and forehead with StO2of 52.3 ± 2.4% and 51.2 ± 7.7%, respectively. Meanwhile the lowest reading of StO2of 48.8 ± 5.1% is observed at the posterior forearm. Based on these findings, this work concluded that palm of the hand would provide considerably consistent measurement of StO2among individuals. This is largely owing to the higher density of circulatory anastomosis at this skin site. This implied viability of using the developed strategy in the studies of microcirculation mechanism especially on wound at this skin region.