Pulse Oximeter

Basic knowledge about a pulse oximeter:

As we all know, the level of oxygen saturation is an important index for the health of the lungs. Pulse oximetry is a noninvasive and painless method of measuring the oxygen saturation of the blood. Fingertip pulse oximeters are routinely used, from regular physical check-ups to surgery. Do you wonder how a fingertip pulse oximeter exactly works? Such a small electronic device utilizes a cold light source that can emit light through the fingertip.

That is why the fingertip appears to be red when the fingertip pulse oximeter is clipped onto it. And the device’s sensor can accurately detect and measure the light that passes through the fingertip without being absorbed by the blood and tissue; through this approach, the device can calculate the amount of oxygen in red blood cells (red blood cells carry the oxygen around a body for aerobic respiration).

A fingertip pulse oximeter integrates the blood oxygen level detector, data processing module, and displaying module into one. It has the advantages of small size, low power consumption, ease of use, lightweight, and portability.