Cardiopulmonary resuscitation
Emergency procedure combining chest compressions and ventilation to sustain life.
Cardiopulmonary resuscitation (CPR) is an emergency procedure used during cardiac or respiratory arrest. It involves chest compressions, often combined with artificial ventilation, to preserve brain function and maintain circulation until spontaneous breathing and heartbeat can be restored. CPR is recommended for those who are unresponsive with no breathing or abnormal breathing, such as agonal respirations.
- field
- Emergency medicine
- known_for
- Chest compressions and artificial ventilation to maintain circulation and oxygenation during cardiac arrest
- compression_depth
- 5 cm to 6 cm (2.0 in to 2.4 in) for adults
- compression_to_breath_ratio
- 30 to 2 in adults
- critical_time_window
- Effective only if performed within seven minutes of blood flow stoppage
Lore & Background
Current recommendations emphasize early and high-quality chest compressions over artificial ventilation; a simplified CPR method involving only chest compressions is recommended for untrained rescuers. With children, however, guidelines indicate that doing only compressions may result in worse outcomes, because such problems in children normally arise from respiratory issues rather than from cardiac ones. The order of interventions was changed for all age groups except newborns from airway, breathing, chest compressions (ABC) to chest compressions, airway, breathing (CAB).
Reader's Guide
CPR is a critical emergency intervention that aims to restore partial flow of oxygenated blood to the brain and heart, delaying tissue death and extending the window for successful resuscitation without permanent brain damage. Its main purpose is not to restart the heart—defibrillation is usually needed for that—but to maintain circulation until a perfusing heart rhythm can be restored. CPR alone is unlikely to restart the heart; administration of an electric shock (defibrillation) is effective only for ventricular fibrillation or pulseless ventricular tachycardia. CPR may succeed in inducing a shockable rhythm. The procedure is continued until the person has a return of spontaneous circulation or is declared dead. Guidelines recommend early defibrillation with an automated external defibrillator when available, and for lone rescuers with drowning victims or unconscious children, two minutes of CPR before calling for help is advised.
Did You Know?
- CPR is effective only if performed within seven minutes of the stoppage of blood flow.
- For children, doing only chest compressions may result in worse outcomes because their cardiac arrest often stems from respiratory issues.
- Defibrillation is effective only for ventricular fibrillation or pulseless ventricular tachycardia, not for asystole or pulseless electrical activity.
Frequently Asked Questions
Who is Cardiopulmonary resuscitation?
CPR is an emergency medical procedure activated when a person's heart has stopped beating or breathing has ceased. It sits at the heart of emergency medicine as the first-line intervention to keep a patient alive until advanced care can take over.
What are Cardiopulmonary resuscitation's powers/role?
Its signature moves are rhythmic chest compressions paired with artificial ventilation, working together to push oxygenated blood through the body. For adults, compressions are driven 5 to 6 cm deep on a 30-to-2 compression-to-breath rhythm.
How does Cardiopulmonary resuscitation's story end?
Its effective window closes roughly seven minutes after blood flow stops, past which irreversible brain damage sets in. The narrative goal is to bridge that gap until the heart and lungs spontaneously resume their own rhythm.
Why is Cardiopulmonary resuscitation important?
It is the only immediate, hands-on method to preserve brain function and sustain circulation once the body's own pumping and breathing have failed. Without it, the minutes between arrest and professional help become unsurvivable.
What are Cardiopulmonary resuscitation's key stats?
For adult patients, compressions must reach a depth of 5 to 6 cm (about 2.0 to 2.4 inches) and follow a 30-to-2 ratio with breaths. The procedure is indicated when a person is unresponsive and shows no normal breathing, including agonal gasps.
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