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Hypoxemia is a medical condition where low blood oxygen levels occur throughout the body, often caused by lung or heart conditions. Symptoms include shortness of breath, weakness, and bluish skin. Treatment depends on the underlying cause and may include oxygen therapy or antibiotics.
Hypoxemia is a medical condition in which low blood oxygen levels occur throughout the body. Oxygen levels are often measured as a percentage, and usually anything between 95 and 100% is considered normal. Some conditions can cause oxygen levels to drop well below this, and if a person has an oxygen saturation of 90% or less, they can be diagnosed with hypoxemia. Some people may have much lower saturation levels, making the condition more serious. In some cases, people with conditions such as congenital heart defects may have chronically low saturation levels in the 80s or lower, particularly if they have cardiac shunts.
There are many potential causes of hypoxemia. Many of these have to do with lung function. Inhaling certain substances such as carbon monoxide in large quantities can lower the oxygen level in the blood. Simple conditions like pneumonia can sometimes make it difficult for blood to get adequate oxygenation as it reaches the lungs. Other lung conditions that can cause hypoxemia include emphysema, chronic obstructive pulmonary disease, or pulmonary embolism. Any condition that reduces lung function, whether temporary, such as suddenly reaching a very high altitude, or more permanent, can affect the lungs’ ability to oxygenate the blood.
As mentioned, some heart conditions can also cause hypoxemia. Whenever blood flow is lower than normal, there may not be enough blood flowing to the lungs to be oxygenated. Another possible cause is anemia, in which there are too few red blood cells to carry oxygen to the body’s tissues.
The primary symptom of hypoxemia may be shortness of breath, but other potential symptoms include paleness, weakness, fatigue, and bluish skin on the extremities, particularly around the fingernails and toenails. Long-term oxygen deficit can lead to other problems such as clubbing of fingers and toes.
How to treat this condition very much depends on its causative factors. Bacterial pneumonia would probably be treated with antibiotics, and whether these were oral or intravenous would depend on the severity of the infection and the level of hypoxemia. For chronic conditions, oxygen might be used to raise blood oxygen saturation levels. Essentially, doctors would be dealing with the underlying condition but could also provide supportive treatment such as oxygen or respiratory support while also giving the treatment time to work.
The causes and treatment of hypoxemia are varied, but people should view the symptoms of this condition, especially shortness of breath, as a serious sign. If shortness of breath occurs without a plausible explanation such as from rigorous exercise, or if it occurs suddenly, medical help is usually needed right away.
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