About Oxygen in the Blood
A person's blood oxygen level is the amount of oxygen in their blood. It shows how effectively the body is delivering oxygen from the lungs to its cells. The normal range for healthy blood oxygen levels is between 75 and 100 millimeters of mercury (mm Hg), which is a unit used to measure pressure). If an arterial blood gas (ABG) test shows an oxygen level below 60 mm Hg, it is considered low and called hypoxemia.
There are several possible causes of low blood oxygen levels. Conditions such as asthma, anemia, and COVID-19 can lead to low blood oxygen levels. When someone has low blood oxygen, they may experience symptoms like shortness of breath and dizziness. Treating the underlying cause is often the first step in addressing low blood oxygen levels, but in some cases, doctors may also recommend oxygen therapy or lifestyle modifications.
High blood oxygen levels can also be abnormal, but they are less common than low levels. Some possible causes of high blood oxygen levels include lung diseases like chronic obstructive pulmonary disease (COPD), certain heart conditions, and certain medications that increase oxygen levels in the blood.
It's important to note that a normal blood oxygen level ensures that vital organs receive enough oxygen to function properly. If you have concerns about your blood oxygen level, it's best to consult with a medical professional who can provide personalized advice and guidance.