Hypoxia occurs when tissues & cells do not get enough oxygene to function correctly. Hypoxia most commonly results from lung conditions.

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Hypoxia might also stem from a heart or liver condition or an injury.

A related health issue is called hypoxemia. This refers to low levels of oxygen in the blood.

This article explores hypoxia in more depth, including comtháng symptoms, when to lớn see a doctor, và how they may diagnose the issue.


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Hypoxia refers to lớn cells or tissues not having enough oxyren lớn function effectively.

When a healthy person inhales, their lungs take in oxygene from the air, then transfer it inlớn the blood. Next, the blood transports the oxygene khổng lồ tissues & cells throughout the body.

Oxygene in the blood enters cells in exchange for carbon dioxide, a waste gas created as cells function. The lungs remove carbon dioxide when the person exhales.


A laông chồng of sufficient blood flow khổng lồ tissues & cells can cause hypoxia.

Some health issues that can reduce blood flow include:

injury that leads lớn blood loss or damages arteriescompression, which might occur in a traumatic injuryheart conditions, such as heart failure or a heart attackliver conditions

A related condition is hypoxemia, which refers to the blood having too little oxygen. Conditions associated with hypoxemia include:

pneumonia asthmafibrosischronic bronchitisswelling of the larynx or lungsinhaling foreign objects that interfere with breathingobesitybeing in a high altitudebeing in a coma or deep sedationmucus plugsbrain damage or neurological conditionsdamage lớn one or both phrenic nerves, which transmit information about motion to lớn respiratory musclesabnormalities in the structure of the lungs or chest wallsome liver conditionsheart conditionsdrug overdosescyanide poisoning

A lachồng of oxygen in cells or tissues causes hypoxia symptoms, which can vary in severity.

Common symptoms of mild to lớn moderate hypoxia and hypoxemia include:

shortness of breath, especially with exertionwheezingrestlessnessheadacheconfusionunexplained exhaustion

Symptoms of severe hypoxia include:

purple or bluish skin a rapid heartbeata loss of consciousness coma

Severe hypoxia can also be fatal.


Speak with a doctor about unexplained trouble breathing or a rapid heart rate.

Anyone with severe trouble breathing, a very rapid heart rate, discolored skin, or altered levels of consciousness should receive sầu emergency care.


Various tools can help doctors diagnose hypoxia, particularly those that show the airways and levels of oxygen in the blood và tissues.

These tools may include:

gas exchange tests to determine the ratio of oxygen to carbon dioxide in the arteriesX-rays or CT scans of the chest and airwaystests that measure oxyren levels during the night

Treating hypoxia has three major goals:

helping maintain airway functionincreasing the amount of oxygene inhaledimproving how much oxygen passes from the blood into lớn the lungs

Comtháng treatments include:

suctioning in the upper airways to lớn keep them clear and remove sầu foreign objectsreducing any blockage in the throat, such as by tilting the headhaving chest physiotherapyhaving an endotracheal tubehaving a flutter valve sầu khổng lồ help keep the airways clear of mucususing an incentive sầu spirometer, a device that helps a person visualize their breathing và learn to lớn take slower, deeper breathsusing nasal cannulas, which deliver oxygene through the noseusing a face mask to deliver oxyren lớn the nose & mouthtaking steroids, for some people with interstitial lung disease

Hypoxia occurs when there is not enough oxyren available lớn meet the needs of cells or tissues in the body toàn thân.

Hypoxemia occurs when there is not enough oxygene in the blood.

In some cases, hypoxemia can lead khổng lồ hypoxia. If the blood does not contain enough oxygene, it cannot deliver the necessary amount to the cells or tissues.


Hypoxia develops when there is too little oxyren in the cells or tissues, & this keeps them from functioning correctly.

A laông xã of blood flow or having too little oxyren in the blood can cause it. This may stem from a lung, heart, or liver condition, or an injury, for example.

Anyone who experiences severe trouble breathing should seek emergency care. A rapid heartbeat, altered levels of consciousness, và discoloration of the skin are other symptoms of hypoxia.

Let a doctor know about any unexplained changes in heart rate or shortness of breath.

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