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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. Photoplethysmogram - Wikipedia

   en.wikipedia.org/wiki/Photoplethysmogram

   A photoplethysmogram (PPG) is an optically obtained plethysmogram that can be used to detect blood volume changes in the microvascular bed of tissue. [1] [2] A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. [3]

4. Oxygen saturation (medicine) - Wikipedia

   en.wikipedia.org/wiki/Oxygen_saturation_(medicine)

   At 1,600 meters' altitude (about one mile high) oxygen saturation should be above 92%. [11] An SaO 2 (arterial oxygen saturation) value below 90% causes hypoxia (which can also be caused by anemia). Hypoxia due to low SaO 2 is indicated by cyanosis, but oxygen saturation does not directly reflect tissue oxygenation. The affinity of hemoglobin ...

5. Why Walgreens Is Shuttering 1,200 Stores While Pharma ... - AOL

   www.aol.com/why-walgreens-shuttering-1-200...

   Walgreens is pulling the plug on 1,200 stores over the next three years. That's no small cut. And they're not the only ones feeling the squeeze. Business Insider reported that CVS and Rite Aid are ...

6. Biden signs Social Security Fairness Act into law

   www.aol.com/biden-signs-social-security-fairness...

   President Joe Biden signed the Social Security Fairness Act into law Sunday afternoon, marking what is expected to be one of the last major pieces of legislation of his presidency. Prior to ...

7. Walgreens plans to close 1,200 stores; its stock price sees a ...

   www.aol.com/news/walgreens-plans-close-1-200...

   Walgreens announced plans to close 1,200 stores over three years. Its CEO previously has said roughly a quarter of locations were underperforming. Walgreens plans to close 1,200 stores; its stock ...