As a subject matter expert in respiratory health, it's important to understand that the human body requires a certain level of oxygen to function properly. Oxygen levels are typically measured in two ways: by arterial blood gas (ABG) analysis, which gives a partial pressure of oxygen (PaO2) in millimeters of mercury (mm Hg), and by pulse oximetry, which provides a percentage of oxygen saturation in the blood. Normal arterial oxygen levels are approximately 75 to 100 mm Hg. When arterial oxygen levels fall below 60 mm Hg, it generally indicates that a person may require supplemental oxygen. For pulse oximetry readings, the normal range is typically from 95 to 100 percent. When these readings fall below 90 percent, it is considered low and may necessitate medical attention. It's crucial to note that these are general guidelines and individual health circumstances can vary. Always consult with a healthcare professional for personalized advice. read more >>

Normal arterial oxygen is approximately 75 to 100 millimeters of mercury (mm Hg). Values under 60 mm Hg usually indicate the need for supplemental oxygen. Normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low.read more >>