Cardiopulmonary Resuscitation (CPR) in Paediatric Life Support

When a child’s heart suddenly stops beating, every second counts. Cardiopulmonary resuscitation (CPR) is a life-saving intervention that can mean the difference between survival and tragedy in pediatric emergencies. Unlike adults, where cardiac arrest often stems from heart disease, children typically experience cardiorespiratory arrest due to conditions that first compromise their breathing. Understanding how to perform pediatric CPR correctly-and recognizing when it’s needed-is essential knowledge for healthcare providers, caregivers, and anyone who works with children.

What is pediatric CPR and why is it different? 🔗

Pediatric CPR refers to the resuscitation techniques specifically adapted for infants (under 1 year) and children (1 year to puberty). The fundamental goal remains the same as adult CPR: to restore circulation and oxygenation to vital organs, particularly the brain, during cardiac arrest. However, the techniques differ significantly because of anatomical differences and the distinct causes of arrest in children.

The most critical difference lies in the underlying cause. In adults, cardiac arrest typically results from primary heart problems like arrhythmias caused by coronary artery disease. In children, cardiac arrest is most commonly caused by hypoxia-a lack of oxygen reaching the tissues. This means that respiratory problems usually precede the heart stopping, making ventilation particularly important during pediatric resuscitation.

Common causes of cardiac arrest in children 🔗

Understanding why children experience cardiac arrest helps healthcare providers anticipate, prevent, and respond effectively to these emergencies. The causes fall into several major categories.

Respiratory causes 🔗

Respiratory failure is the leading cause of pediatric cardiac arrest. Common respiratory emergencies include severe asthma attacks, lower respiratory tract infections like bronchiolitis and pneumonia, airway obstruction from choking or foreign bodies, smoke inhalation, and drowning. When breathing fails, oxygen levels drop, eventually leading to cardiac arrest if not corrected promptly.

Cardiac causes 🔗

Hypertrophic cardiomyopathy is the most common cardiovascular cause of sudden cardiac arrest in young people. Other cardiac causes include congenital heart defects, coronary artery abnormalities, and primary arrhythmias from conditions like long QT syndrome or Wolff-Parkinson-White syndrome. These conditions may go undiagnosed until a sudden collapse occurs.

Other contributing factors 🔗

Additional causes include severe infections leading to septic shock, anaphylactic reactions, traumatic injuries (particularly head or chest trauma), poisoning, and electrolyte imbalances. Drowning deserves special mention as it progresses from respiratory arrest to cardiac arrest, making early intervention particularly time-sensitive.

The CPR procedure: A systematic approach 🔗

Effective pediatric CPR follows the C-A-B sequence: Circulation (chest compressions), Airway, and Breathing. This approach, recommended by the American Heart Association, prioritizes chest compressions because maintaining blood flow to vital organs is critical during the first moments of cardiac arrest.

Step 1: Assess the scene and check responsiveness 🔗

Before approaching a collapsed child, ensure the scene is safe. Gently tap the child and shout to check for responsiveness. For infants, flick the sole of the foot. If there is no response, immediately call for help and have someone retrieve an automated external defibrillator (AED) if available.

Step 2: Check for breathing and pulse 🔗

Quickly assess whether the child is breathing normally and check for a pulse. For children, check the carotid pulse at the neck; for infants, check the brachial pulse on the inner upper arm. This assessment should take no more than 10 seconds. If there is no pulse or the heart rate is below 60 beats per minute with signs of poor perfusion, begin CPR immediately.

Step 3: Perform chest compressions 🔗

Chest compressions are the foundation of effective CPR. The American Red Cross recommends compressing the chest at a rate of 100 to 120 compressions per minute. For children, use the heel of one or both hands (depending on the child’s size) to compress the center of the chest to a depth of approximately 2 inches (5 cm), which is about one-third of the chest diameter. For infants, use two fingers placed just below the nipple line, compressing to approximately 1.5 inches (4 cm).

Allow complete chest recoil between compressions to permit the heart to refill with blood. Minimize interruptions-pauses in compressions reduce blood flow to the brain and heart.

Step 4: Open the airway and provide ventilations 🔗

After 30 compressions (for a lone rescuer), open the airway using the head-tilt/chin-lift maneuver. For children, tilt the head to a slightly past-neutral position; for infants, maintain a neutral position to avoid overextending the neck. Deliver two rescue breaths, each lasting about one second, watching for visible chest rise.

Compression-to-ventilation ratios 🔗

The ratio of compressions to ventilations depends on the number of rescuers present. For a single rescuer performing pediatric CPR, the recommended ratio is 30:2-thirty chest compressions followed by two rescue breaths. This ratio applies to both infants and children.

When two healthcare providers are present, the ratio changes to 15:2 for infants and children. This provides more ventilations, which is particularly important given that pediatric cardiac arrest often stems from respiratory causes. One rescuer performs compressions continuously while the other manages the airway and delivers breaths.

Special technique for two-rescuer infant CPR 🔗

For infants with two rescuers, the preferred compression technique is the two-thumb encircling hands method. The rescuer places both thumbs side by side on the sternum while the fingers encircle the infant’s chest for support. This technique generates more consistent compression depth and higher coronary perfusion pressure compared to the two-finger technique.

Why ventilation matters in pediatric CPR 🔗

Unlike adults, where compression-only CPR can be effective for witnessed arrests of cardiac origin, children require both compressions and ventilations. Because most pediatric arrests result from respiratory failure, by the time the heart stops, the child is already severely oxygen-depleted. Providing rescue breaths helps reverse the underlying hypoxia that caused the arrest.

Research has demonstrated that for pediatric arrests from non-cardiac causes, bystander CPR with both compressions and ventilations is more effective than compressions alone. Healthcare providers should deliver 20 to 30 breaths per minute (one breath every 2-3 seconds) once an advanced airway is in place.

The critical importance of early intervention 🔗

Time is the enemy in cardiac arrest. When circulation stops, the brain begins to suffer damage within 3 to 4 minutes. After this window, the risk of irreversible cerebral injury increases dramatically with each passing minute. This is why immediate recognition and prompt initiation of CPR are so vital.

Survival outcomes have improved significantly when high-quality CPR begins immediately. According to data from the American Heart Association’s Get With The Guidelines-Resuscitation Registry, survival rates for pediatric in-hospital cardiac arrest improved from 19% in 2000 to 44% in 2022. This improvement is attributed to early recognition, high-quality CPR, and better post-arrest care.

Using an AED in children 🔗

Automated external defibrillators can be life-saving for children experiencing shockable rhythms like ventricular fibrillation or pulseless ventricular tachycardia. When an AED is available, apply it as soon as possible without interrupting CPR.

For children under 8 years of age, use pediatric pads or a pediatric dose attenuator if available. If pediatric equipment is not available, adult pads may be used, but ensure the pads do not touch or overlap-use an anterior-posterior placement if necessary. The AED will analyze the rhythm and advise whether a shock is indicated.

Recognizing the Hs and Ts 🔗

During resuscitation, healthcare providers should consider reversible causes using the mnemonic “Hs and Ts.” The Hs include hypoxia, hypovolemia, hydrogen ions (acidosis), hypokalemia or hyperkalemia, hypothermia, and hypoglycemia. The Ts include tension pneumothorax, cardiac tamponade, toxins, thrombosis, and trauma. In children, hypoxia and hypovolemia are the most common reversible causes. Identifying and treating these underlying conditions during CPR can restore spontaneous circulation.

Post-resuscitation care 🔗

Successful resuscitation does not end with the return of a pulse. Post-arrest care focuses on neuroprotection, hemodynamic stabilization, and identifying the underlying cause of the arrest. Children who achieve return of spontaneous circulation require intensive monitoring and may need targeted temperature management and other specialized interventions to optimize neurological outcomes.

What do you think? Have you ever considered how different pediatric emergencies are from adult emergencies, and how this knowledge might change your approach to learning life-saving skills? What steps could schools and community organizations take to improve CPR training accessibility for parents and caregivers?

References

1. https://www.ncbi.nlm.nih.gov/books/NBK436018/
2. https://www.saem.org/about-saem/academies-interest-groups-affiliates2/cdem/for-students/online-education/peds-em-curriculum/approach-to/cardiac-arrest
3. https://www.healthychildren.org/English/health-issues/injuries-emergencies/sports-injuries/Pages/Sudden-Cardiac-Death.aspx
4. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001370
5. https://www.redcross.org/take-a-class/cpr/performing-cpr/child-baby-cpr
6. https://www.ahajournals.org/doi/10.1161/circulationaha.110.971085