The use of a medical device called a pulse oximeter, which measures blood oxygen levels, has increased considerably since the start of the COVID-19 pandemic. That’s in part because it’s possible for ...
Normal blood oxygen level is either 95%-100% SpO2 on an oximeter or 80-100 mm Hg from an ABG test. ABG tests are more accurate than pulse oximeters, which have a ...
Dr. Takuo Aoyagi, a Japanese bioengineer, was the first to invent pulse oximetry in 1974. 2 The pulse oximeter is based on the light absorption characteristics of hemoglobin at different wavelengths.
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