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Low blood oxygen, known as hypoxemia, means that the level of oxygen in the blood has fallen below normal levels, due to one or more of many different causes. Under most circumstances, breathing room air, normal readings range from 95 to 100 percent.
Pulse oximeters represent a cost saving measure for those patients with oxygen therapy needs and it also provides a warning before the patient feels sick. General health. A healthy regular individual should have an oxygen saturation level (SpO2) at or above 96% and a resting heart rate from 60 to 100 beats a minute.