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  2. Pulse Oximetry: Uses, Readings, and How It Works - Healthline

    www.healthline.com/health/pulse-oximetry

    Pulse oximetry is a noninvasive test that measures the oxygen saturation level of your blood. It can rapidly detect even small changes in oxygen levels. These levels show how efficiently blood is ...

  3. Pulse oximetry, or pulse ox, is a quick, inexpensive, and needle-free test that measures the amount of oxygen in your blood.It shows whether your heart and lungs supply enough oxygen to meet your ...

  4. Pulse oximetry - Wikipedia

    en.wikipedia.org/wiki/Pulse_oximetry

    Pulse oximetry is a noninvasive method for monitoring a person's blood oxygen saturation. Peripheral oxygen saturation (Sp O2) readings are typically within 2% accuracy (within 4% accuracy in 95% of cases) of the more accurate (and invasive) reading of arterial oxygen saturation (Sa O2) from arterial blood gas analysis. [1]

  5. Blood Oxygen Levels: What Is a Normal Level? - Healthline

    www.healthline.com/health/normal-blood-oxygen-level

    There are two types of tests used to measure blood oxygen levels: pulse oximeter and arterial blood gas (ABG). A pulse oximeter may be used at home or at a medical office. ABG, while very accurate ...

  6. What Oxygen Level Is Too Low for COVID-19? - Healthline

    www.healthline.com/health/what-oxygen-level-is...

    A pulse oximeter (pulse ox) is a device that can measure your blood oxygen level quickly and noninvasively. They’re regularly used in doctor’s offices and hospitals, so you’ve most likely ...

  7. Blood Oxygen Level: How to Increase It - WebMD

    www.webmd.com/fitness-exercise/how-to-increase...

    A pulse oximeter emits light that passes through your fingernail, skin, tissue, and blood to a sensor on the other side. The device measures how much light passed through without being absorbed by ...

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