Respiratory arrest occurs when a person completely stops breathing, meaning they can no longer move air in or out of their lungs. This total cessation prevents life-sustaining oxygen from entering the body and stops the removal of harmful carbon dioxide.
Visible indicators of this condition include a total loss of consciousness and the absence of any visible chest movement. A bluish tint may also appear on the skin or lips, which is a direct sign of severe oxygen depletion.
Because this is a life-threatening medical emergency, you must act quickly to assess the person's breathing and responsiveness. If they are not breathing, you should call 911 immediately and begin rescue breathing to provide vital oxygen.
Symptoms of respiratory arrest
The primary symptoms that indicate respiratory arrest include:
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An absence of breathing movements in the chest area.
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A total loss of consciousness or responsiveness.
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Bluish or grayish discoloration of the skin and mucous membranes.
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No air exiting the nose or mouth.
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Complete lack of physical movement or muscle tone.
Early warning signs of impending respiratory arrest may include extreme drowsiness, very slow or shallow breathing, and a significant drop in oxygen saturation levels, signs that suggest that the blood's oxygen supply is rapidly failing.
Cardiac arrest vs. respiratory arrest
In cardiac arrest, the heart stops pumping entirely, which immediately halts blood circulation and the delivery of oxygen to the entire body. In contrast, respiratory arrest occurs when the lungs stop functioning, meaning the blood is no longer being oxygenated even if the heart is still temporarily beating.
It is very common for respiratory arrest to lead directly to cardiac arrest, a combined state known as cardiopulmonary arrest. This happens because the heart muscle eventually fails when it is deprived of the oxygen it needs to function.
Common causes
Respiratory arrest can be triggered by a physical blockage in the airway, often caused by a loss of muscle tone, which allows the tongue to collapse into the throat, or the presence of blood, mucus, vomit, or foreign objects lodged in the airway.
Environmental and chemical factors can also play a role, such as inhaling toxic fumes or gases. Furthermore, certain medications can cause respiratory arrest as a severe side effect, particularly opioids and sedatives that suppress the brain's drive to breathe.
Medical conditions that affect the muscles or nervous system can also lead to this emergency. These include myasthenia gravis, botulism, Guillain-Barré syndrome, and neurological issues like a stroke or brain tumors.
Respiratory arrest in children
In pediatric cases, respiratory arrest is frequently the result of choking on food or small household objects that are accidentally swallowed or inhaled. These objects can easily block the narrow air passages of a child.
Respiratory arrest in children can also stem from underlying illnesses such as severe asthma attacks, pneumonia, or systemic infections. In some instances, it may occur as a severe reaction to specific medications.
Based on guidelines from the American Academy of Pediatrics, children are significantly more vulnerable to respiratory issues because their airways are much smaller and more delicate than those of adults, meaning even a minor obstruction or respiratory infection can escalate into a life-threatening situation very quickly.
What to do in case of respiratory arrest
If you suspect someone is experiencing respiratory arrest, it is vital to follow these emergency steps:
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Attempt to wake the person by shouting or tapping them to see if they are conscious.
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Check for breathing by placing your ear near their mouth and nose while watching their chest for any rise and fall.
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Call 911 or local emergency services immediately if you do not feel air, hear breath, or see the chest moving.
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Start rescue breathing by providing breaths through the mouth-to-mouth or mouth-to-nose technique, which is often preferred for small children.
To perform mouth-to-mouth rescue breathing, lay the person on their back, tilt their head back slightly, and lift the chin to open the airway while pinching the nose shut. Place your mouth over theirs to create a seal, take a normal breath, and blow steadily into their mouth to make the chest rise.
If the respiratory arrest is caused by choking, you should first attempt to clear the airway using the Heimlich maneuver. If the person loses consciousness during these efforts, you must transition immediately to providing rescue breaths and emergency care.
According to the American Heart Association, acting within the first 5 minutes is absolutely critical to prevent permanent damage to vital organs, as the brain and heart are extremely sensitive to oxygen deprivation and can suffer irreversible harm very quickly.
Is respiratory arrest serious?
Respiratory arrest is a critical and life-threatening condition because the body cannot survive without a constant supply of oxygen. If oxygen does not reach the brain and other vital organs, it can result in permanent brain damage or death within a matter of minutes without rapid medical intervention.