Abstract
An oximeter is a piece of medical equipment that is employed for the sole purpose of measuring the amount of oxygen that is present in the blood and can also be used to keep track of one's overall health. The optical principle serves as the primary foundation for the oximeter's detecting method, which allows it to determine the presence of oxygen in the blood. By using a method that is known as absorption, a particular color of light is shone on the blood. Next, spectral analysis is used to measure the absorption rate of oxygen in the blood after being exposed to various wavelengths of light. This allows one to calculate the concentration of oxygen in the blood and, ultimately, the blooding oxygen saturation. Pulse oximetry can be thought of as an example of a non-invasive biosensor because its operating principle is distinct from that of invasive biosensors. The measurement of pulse oximetry, as well as its development trend and the manner in which this gadget interfaces with a smartphone, will be the primary subject of this article.
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