![]() ![]() Oxygen saturation may also dip for brief periods due to other factors, such as a change in sleeping position or momentary breath-holding. A person who rolls over in their sleep may loosen the device, causing it to give a false alert. ![]() The accuracy of pulse oximeters depends on a correct fit, and minor changes in their positioning can produce an inaccurate reading. The main risk of pulse oximetry is a false reading. Anyone who experiences numbness, tingling, or changes in skin color should promptly notify a doctor. If fitted very tightly and used for a prolonged period, pulse oximeters can cut off oxygen from surrounding vessels. Some people experience minor irritation, including skin redness and sensitivity. Pulse oximetry devices are noninvasive and carry no serious risks. A pulse oximeter does not directly measure oxygen saturation but instead uses a complex equation and other data to estimate the exact level. The amount of light absorbed by the blood indicates the oxygen saturation. ![]() The light shines through to a detector positioned on the other side of the skin.įor example, when a pulse oximeter is clipped onto a finger, one side of the clip shines the light, and the other detects it. ![]() Pulse oximeters work by shining a light through a relatively transparent area of the skin. heart failure or a history of heart attacks.diseases, such as emphysema, lung cancer, and lung infections.Oxygen saturation can drop for many reasons, including: The device may be attached to a finger, a wrist, a foot, or any other area where the device can read blood flow. Pulse oximeters are clip-on devices that measure oxygen saturation. Share on Pinterest Oxygen is distributed into the blood in red blood cells. ![]()
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