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A pulse oximeter is a device smaller than the palm of your hand. Can be carried For measuring the oxygen system in the blood Using the method of inserting a finger into the device to measure Which takes less than a minute to measure After that, the device will tell the blood oxygen value on the display screen. To know if the value is normal or not

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Precautions for use
1. Measuring blood oxygen saturation is not an indication of COVID 19 infection, but it is a device that helps an infected person assess their initial symptoms. Because if it is found that the oxygen value is lower Showing that the infection may enter the lungs You should see a doctor immediately.

2. Some patients may have lower blood oxygen levels, such as patients with lung disease, heart disease, obesity, anemia, high smoking

3.The measured oxygen value can be inaccurate by factors such as
- Taking measurements when hands are too wet or too cold
- Contamination on fingers and nails, such as bruises, tattoos, false nails, or dark nail polish. Especially black and blue
- Darker skin color results in a slightly higher reading of the meter.
- There is a movement of the fingers and the body while in use.
- poor blood flow Causing less blood to feed on the fingertips
- pale

4. You should measure at least 2 times or switch your left and right fingers. For the accuracy of the machine