The Principles of Pulse Oximetry

The oxygen saturation is a measure of how much heme of Gobiene is bound to oxygen. So in this case, it's 96% is oxygenated. How does that number appear on the monitor? OK, so this uses pulse oximetry. And there are several important principles useful in pulse Oximetry to consider. The first principle is the principle of light absorbance as described by the B.O. Lambert Law.