Difference Between Hypoxia and Hypoxemia (With Table)

Hypoxia and hypoxemia, two terms that sound similar but have very different meanings. Hypoxia refers to a reduction in tissue oxygenation, whereas hypoxemia is the arterial partial pressure of oxygen (PaO2) which reflects the amount of oxygen dissolved in arterial blood. Cells that are rich in energy-producing mitochondria are particularly sensitive to low levels of oxygen.

Hypoxia vs Hypoxemia

The difference between Hypoxia and Hypoxemia is that Hypoxia can give headaches, but Hypoxemia gives the patient very severe headaches. Hypoxemia is a condition when the patient has reached the first stage of Hypoxemia. Hypoxia patients are normally told to lie down for oxygen circulation, but Hypoxemia patients have to undergo medical evacuation.

Hypoxia is a condition of low oxygen or hypoxemia. This can be due to a reduction in the partial pressure of oxygen, an insufficient supply of oxygen, or both. Hypoxia may result from high altitude, poor air quality, pulmonary disease, or heart failure. Hypoxia can also be induced by some forms of training that are used for endurance sports and military applications.

Hypoxemia is a condition in which the body does not get enough oxygen in the blood. It can occur for several reasons, ranging from heart failure to pneumonia. The most common cause of severe hypoxemia, though, is an impairment in breathing.

Comparison Table Between Hypoxia and Hypoxemia

Parameters of ComparisonHypoxiaHypoxemia
TreatmentMedical EvacuationLie on the ground
Lack of oxygenTissuesBlood
ReasonEnvironmental conditionsBody conditions

What is Hypoxia?

Hypoxia, or low oxygen levels in the blood, is a common problem that affects millions of people every year. The causes are vast and vary from person to person, but some of the most common causes include obesity, smoking, high altitudes, heart disease, and lung disease.

Hypoxia can be debilitating for some people—even fatal for others. For those living with chronic hypoxia, there are several methods available to help decrease their symptoms. These treatments range from lifestyle changes like losing weight to more invasive procedures. Also included are treatments not yet deemed fully effective despite promising results.

The term “hypoxic” describes environments with low levels of oxygen (O²), where ‘anemic’ would refer to a reduced concentration of circulating blood cells, for example. Hypoxia is a condition that occurs when an organism is deprived of adequate amounts of oxygen supply to bodily tissues.

Hypoxia may be classified as either regional (deprivation of oxygen in a specific part of the body) or general (the entire body’s deprivation of oxygen). Hypoxia is a condition that occurs when the concentration of oxygen in the blood drops below normal levels. The most common cause of hypoxia is altitude sickness, but it can also be caused by pulmonary and cardiac diseases, lung injury, and problems with the heart’s oxygen supply.

What is Hypoxemia?

Anxiety and panic attacks are among the most frequent causes of severe hypoxemia. It’s estimated that 60% of people who experience anxiety attacks will have at least one episode where they experience breathing problems. Those whose anxiety has gone on for a long time or been particularly bad are also more likely to.

Hypoxemia is a condition when the amount of oxygen lowers in the blood content of the body. Hypoxic conditions can occur in the body when there is not enough oxygen for it to function properly or when the body fails to transport available oxygen to its tissues. This condition occurs when the cells within your body are unable to obtain sufficient amounts of oxygen.

This lack of oxygen results in damaging effects on your organs, tissues, and cells. Hypoxemia is a condition in which an individual has abnormally low levels of oxygen in the blood. Hypoxemia can result from several different conditions, including heart failure, COPD, pulmonary embolism, pneumonia, and emphysema.

It can also occur as a result of anything that results in a reduction in blood flow to the lungs, such as anemia or certain medications. Normal levels of oxygen are between 94% and 100%. In hypoxic conditions, there is less than 90% of normal oxygen present. Normal blood gas levels are arterial with venous being.

Main Differences Between Hypoxia and Hypoxemia

  1. Hypoxia patients may experience headaches, but Hypoxemia patients have severe headaches.
  2. Hypoxemia is the beginning stage of Hypoxia.
  3. Hypoxia patients have to undergo medical evacuation, but Hypoxemia patients have to lie on the ground for proper oxygen circulation in their bodies.
  4. Hypoxia can never be measured, but Hypoxemia can be measured.
  5. Hypoxia is a lack of oxygen in tissues, but Hypoxemia is a lack of oxygen in the blood.
  6. Hypoxia happens due to environmental conditions, but Hypoxemia happens due to in-body conditions.


The effects of hypoxia vary depending on how severe it is. Mild hypoxia can cause fatigue, nausea, and headaches, while severe hypoxia can cause fainting and death if left untreated. The best way to treat mild hypoxia is to go down to a high point while it is difficult.

Hypoxemia refers to inadequate tissue penetration. It can be caused by a decrease in oxygen tension in the arteries or by insufficient alveolar ventilation. Signs and symptoms include tachycardia, tachypnea, cyanosis, dizziness, confusion, loss of consciousness, seizures, and fainting.

The main cause is hypoventilation (insufficient breathing), which can be due to lung disease or high airway obstruction. Other causes include heart failure (due to low blood pressure), anemia (low blood pressure), and high blood pressure. Hypoxemia is a condition in which the amount of oxygen in the blood decreases.

Toxic conditions can occur in the body when there is not enough oxygen to function properly or when the body fails to supply the oxygen available to its muscles. This condition occurs when cells in your body are unable to get the right amount of oxygen. This lack of oxygen leads to harmful effects on your organs, muscles, and tissues.


  1. https://www.nejm.org/doi/full/10.1056/NEJMra0910283
  2. https://journals.physiology.org/doi/abs/10.1152/jappl.1999.87.6.1997
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