A pulse oximeter is a medical device that used to measure the amount of oxygen in a patient's blood and changes in blood volume in the skin. In hospital, you always can see it was attached to a medical monitor, so that the medical staff able to see a patient's oxygenation at all times.
Currently you can find in market those fingertip pulse oximeter for sports, pilots or anyone who wish to check their oxygen/pulse rate. It is so portable, accurate and easy to use too!
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