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Tiffany Kinyua is a psychology major with a minor in biology and she is a 2025-26 health care ethics intern at the Markkula Center for Applied Ethics at Santa Clara University. Views are her own.

For most people, a normal pulse oximeter reading is between 95% and 100%, with readings below 90-92% generally considered low and requiring medical attention. They are known to be affected by several ...

In a suit filed against CVS, Walgreens, GE Healthcare and many other medical technology companies and sellers of pulse oximeters – devices that use light to measure oxygen saturation in the blood – ...

In the EXAKT study from the U.K., the home-use pulse oximeters assessed all gave higher oxygen saturation (SpO2) readings for patients with darker skin tones than for patients with lighter skin tones.