Cardiopulmonary resuscitation

We can help a person.

If they stop breathing, we push on their chest. This helps blood move. This keeps their brain safe.

We can also blow air into their mouth. This helps them get air. We must push the chest fast. We should push at least 100 times every minute. This helps the body until help arrives.

It is a very big help.

Sometimes a person's heart or breathing stops. This is a very big emergency. We can use CPR to help them.

CPR stands for cardiopulmonary resuscitation. It is a way to keep blood moving. This helps keep the brain and heart alive.

To do CPR, you push on the chest. For adults, you use two hands. You must push at least 100 times every minute. You should push down about 5 cm. This is about 2 inches deep. You also push on the sternum. This is the bone in the middle of the chest.

Some people also give rescue breaths. This is called artificial ventilation. You can blow air into the mouth or nose.

For adults, you do 30 pushes and then 2 breaths. For children, the ratio might change to 15 to 2.

CPR alone may not restart the heart. A machine called an AED can help. This machine gives an electric shock. This is called defibrillation. It helps the heart find a good rhythm again.

Keep doing CPR until help arrives.

Cardiopulmonary resuscitation, or CPR, is a life-saving emergency procedure. It is used when a person's heart or breathing stops. This is a very serious moment.

The main goal is to keep blood moving through the body. This helps send oxygen to the brain and heart. Without blood flow, the brain can suffer damage after just four minutes.

If blood stops for one to two hours, body cells may die. CPR helps delay this damage until doctors can help.

To perform CPR, a rescuer uses chest compressions. For adults, you push on the sternum, which is the bone in the middle of the chest.

You must push down about 5 cm, or 2 inches, deep. The rate should be between 100 and 120 compressions every minute. Some rescuers also provide artificial ventilation, which are rescue breaths.

For adults, the pattern is usually 30 compressions followed by 2 breaths. For babies, you use only two fingers to push the chest. You must also be careful with a baby's head to keep it straight.

Rules for CPR have changed over time to help more people. In 2010, the American Heart Association (AHA) updated their guidelines. They moved the order of steps to focus on chest compressions first. This is called the CAB method, which stands for compressions, airway, and breathing.

Before this, the order was ABC, which meant airway, breathing, and then compressions. These changes help make sure blood keeps moving as quickly as possible. High-quality compressions are the most important part of the process.

There are specific steps to follow during an emergency. First, you should ask bystanders for help. If you are alone, call emergency services on the phone right away.

If an automated external defibrillator, or AED, is nearby, you should get it. An AED is a portable machine that helps the heart.

It uses electric shocks, called defibrillation, to help the heart find a healthy rhythm. This is very helpful for certain heart problems like ventricular fibrillation.

CPR works similarly to how a pump moves water through a pipe. The compressions act like a pump for the blood. This keeps the vital organs alive even when the heart is not working on its own.

You should continue CPR until the person starts breathing on their own or help arrives. If a person is drowning, the rules change slightly. For drowning victims, rescue breaths are extra important because they need oxygen. Learning these steps can make a huge difference in a crisis.

Cardiopulmonary resuscitation, commonly known as CPR, is an emergency procedure used during cardiac or respiratory arrest. This occurs when a person's heart stops pumping or they stop breathing. The primary goal of CPR is not to restart the heart, but to maintain circulation. By performing chest compressions, a rescuer can keep oxygenated blood flowing to the brain and heart. This process helps delay tissue death and extends the window of opportunity for professional medical help to arrive.

The mechanism of CPR relies on creating a pressure gradient within the body. When a rescuer pushes on the sternum, which is the bone in the middle of the chest, they are manually pumping the heart. This action generates pressure that moves blood between the arterial and venous vascular beds. To be effective, the rescuer must push deep enough to compress the heart and then allow the chest to fully relax. This relaxation allows the heart to refill with blood before the next compression.

There are different methods of CPR depending on the victim's age and the situation. For adults, the standard approach involves a ratio of 30 chest compressions to 2 rescue breaths. Rescuers use two hands to push to a depth of approximately 5 cm, or 2 inches. For children, one hand may be sufficient, and the compression-to-breathing ratio changes to 15:2 if two trained rescuers are present. Infants require a different technique entirely, using only two fingers to compress the chest to a depth of 4 cm.

History shows that the way we perform CPR has evolved to improve survival. In 2010, the American Heart Association (AHA) and the International Liaison Committee on Resuscitation updated their guidelines. They changed the recommended sequence from ABC (airway, breathing, compressions) to CAB (compressions, airway, breathing). This shift emphasizes that high-quality chest compressions are the most critical part of the process. Modern guidelines also suggest that untrained rescuers can perform "hands-only" CPR, which involves only chest compressions without rescue breaths.

Timing is a critical factor in the success of CPR. The brain can sustain damage after blood flow has stopped for about four minutes. Irreversible damage can occur after approximately seven minutes. If blood flow ceases for one to two hours, body cells will die. Therefore, CPR is most effective when performed within seven minutes of the stoppage of blood flow.

In many cases, CPR is used alongside an automated external defibrillator, or AED. An AED is a portable machine that analyzes a person's heart rhythm. It can deliver an electric shock, a process called defibrillation, to help the heart restore a viable rhythm. This is specifically effective for certain rhythms like ventricular fibrillation or pulseless ventricular tachycardia. However, defibrillation is not effective for rhythms like asystole, which usually requires treating the underlying medical condition.

When responding to an emergency, there is a specific order of operations to follow. A rescuer should first ask bystanders for help and call emergency medical services. If an AED is available nearby, it should be retrieved and used as soon as possible. If a rescuer is alone with a drowning victim or a child, they should perform two minutes of CPR before leaving to call for help. This is because respiratory issues, rather than cardiac ones, are often the cause of arrest in these groups.

CPR connects to many different fields of medical science, including physiology and emergency medicine. It demonstrates how physical pressure can mimic biological functions to sustain life. By understanding the relationship between oxygenation, blood flow, and brain function, medical professionals can better treat patients. CPR remains a vital tool in the chain of survival, bridging the gap between a sudden arrest and professional clinical intervention.