Cardiopulmonary Resuscitation, universally known as CPR, is an emergency life-saving procedure performed when someone's breathing or heartbeat has stopped. The primary goal is to manually maintain a minimal flow of oxygenated blood to the brain and heart, delaying tissue death until advanced medical help arrives. Without swift intervention, irreversible brain damage begins within minutes as cellular hypoxia sets in.
Nursing students must recognize that CPR is not meant to restart a stopped heart in most cases; rather, it buys crucial time. Chest compressions act as an artificial pump, while rescue breaths supply oxygen to the lungs.
The chain of survival represents a sequence of coordinated events that give a patient the best chance of surviving cardiac arrest. A breakdown in any single link drastically lowers survival rates.
Cardiac arrest occurs when the heart abruptly ceases to pump blood effectively, usually stemming from an electrical malfunction in the heart. The most common initial rhythm in adult sudden cardiac arrest is ventricular fibrillation (VF), where the ventricles quiver uselessly instead of contracting. Another common rhythm is pulseless ventricular tachycardia (VT), characterized by a rapid, ineffective heart rate.
Non-shockable rhythms include asystole (total absence of electrical activity) and pulseless electrical activity (PEA), where electrical rhythms appear on a monitor but the heart muscle fails to mechanical contract.
Rapid assessment is vital. Nurses must quickly determine if a patient is unresponsive and not breathing normally. Gasping, known as agonal respirations, is not normal breathing and must be treated as cardiac arrest.
High-quality CPR maximizes the chance of survival. Rescuers must push hard and push fast. For adults, compression depth must be at least 2 inches (5 cm) but not greater than 2.4 inches (6 cm), at a rate of 100 to 120 compressions per minute. Complete chest recoil between compressions is mandatory to allow blood to fill the heart chambers.
The standard compression-to-ventilation ratio for untrained bystanders is hands-only CPR. For trained healthcare providers managing an adult single-rescuer code, the ratio is 30 compressions to 2 breaths.
An Automated External Defibrillator analyzes the heart rhythm and delivers an electrical shock to terminate abnormal rhythms like ventricular fibrillation. As soon as an AED arrives, the nurse must turn it on and follow the visual and voice prompts.
| AED Step | Action Required |
|---|---|
| Step 1 | Power on the device immediately. |
| Step 2 | Apply adhesive pads to the bare chest. |
| Step 3 | Clear the patient so nobody touches them during analysis. |
| Step 4 | Push the shock button if advised by the machine. |
Advanced life support (ALS) builds upon basic CPR by adding advanced airway management, vascular access, and pharmacotherapy. Endotracheal intubation or supraglottic airway insertion secures the airway and allows continuous chest compressions without pausing for breaths.
Intravenous or intraosseous access enables the administration of emergency drugs. Epinephrine is the primary vasoactive drug given every 3 to 5 minutes during cardiac arrest to promote coronary and cerebral blood flow. Antiarrhythmics like amiodarone or lidocaine are administered for refractory ventricular fibrillation or pulseless ventricular tachycardia.
When spontaneous circulation returns, post-resuscitation care begins. The immediate focus is maintaining adequate oxygenation, ventilation, and hemodynamic stability. Nurses monitor vital signs closely, manage arterial blood gas values, and watch for recurrent arrhythmias.
Targeted temperature management (TTM) is often initiated for comatose patients to preserve neurological function by keeping core body temperatures cooler for a set duration. Continuous nursing vigilance prevents secondary brain injury and organ failure.
Deciding when to start or stop resuscitation involves complex clinical and ethical judgments. Resuscitation should not be initiated if the patient has a valid, documented Do Not Resuscitate (DNR) order, or if obvious clinical signs of irreversible death are present, such as rigor mortis or decapitation.
During ongoing codes, the healthcare team decides to terminate efforts based on factors like downtime, initial rhythm, and patient comorbidities. Nurses play a crucial role in advocating for patient dignity and supporting grieving families after resuscitation efforts cease.