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Monte Carlo investigation of the effect of blood volume and oxygen saturation on optical path in reflectance pulse oximetry

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Academic year: 2019

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Figure

Figure 1. Geometry for Monte Carlo model in a reflectance pulse oximetry set-up, presented in Cartesian co-ordinates (x,y,z)
Figure 2. Distribution of optical paths in monolayer dermal skin tissue containing blood volume 7.5% at a saturation of 60% is shown at 660 nm from source (S) to detector (D), placed at a distance 3 mm (a) and at 6 mm (b); and the same at 940 nm in (d) and
Figure 3. Differential mean optical path (MOP) between red and infrared wavelengths as a function of source-detector separation (d) for perfused dermal skin tissue is shown
Figure 4. Percentage change in mean optical path between red and infrared light (MOP), calculated for a certain source-detector separation 6 mm, as a function of blood volume (V) is shown for blood oxygen saturations StO2 = 50%, 60%, 70%, 80%, 90% and 100
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