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2. Pulse oximetry - Wikipedia

   en.wikipedia.org/wiki/Pulse_oximetry

   A pulse oximeter probe applied to a person's finger. A pulse oximeter is a medical device that indirectly monitors the oxygen saturation of a patient's blood (as opposed to measuring oxygen saturation directly through a blood sample) and changes in blood volume in the skin, producing a photoplethysmogram that may be further processed into other measurements. [4]

3. The problem with pulse oximeters your doctor probably ... - AOL

   www.aol.com/news/problem-pulse-oximeters-doctor...

   Pulse oximeters specifically intended for medical use do fall under FDA purview. ... and most accurate way of testing whether a person has normal oxygen levels is to stick a needle into a person ...

4. Transcutaneous oxygen measurement - Wikipedia

   en.wikipedia.org/wiki/Transcutaneous_oxygen...

   Many factors can limit the accuracy of the test including edema, temperature, inflammation, medications, and stress. In addition for the measurement to be normal, all parts of the oxygenation pathway must be functioning: the lungs must be able to oxygenate the blood, the heart must be able to pump the blood, and a patent artery must be able to ...

5. Pulse oximeters found to be less accurate for Black vs. white ...

   www.aol.com/pulse-oximeters-found-less-accurate...

   Story at a glance New research sheds light on the widespread discrepancies of pulse oximeter accuracy among patients of color. The devices are used in both veterans and commercial hospitals.

6. Hemoximetry - Wikipedia

   en.wikipedia.org/wiki/Hemoximetry

   The functional oxygen saturation measured by this procedure is the basis for calibrating pulse oximeters. Pulse oximeters cannot be calibrated using physical procedures, but only by directly comparing the reported measurements and the parallel arterial oxygen saturation measured by hemoximetry in a group of healthy subjects. [citation needed]

7. FDA panel recommends more diversity in pulse oximeter trials

   www.aol.com/news/fda-panel-examine-ways-better...

   The longstanding problem of pulse oximeters providing less-accurate readings for people with dark skin tones got another look Friday from a panel of experts for the US Food and Drug Administration.