The treatment of shock in PALS (Pediatric Advanced Life Support) follows a systematic approach that begins with rapid assessment, moves to fluid resuscitation, and escalates to medications and targeted interventions based on the type of shock. The core principle is early recognition and aggressive treatment before blood pressure drops, since hypotension is a late and dangerous sign in children.
Recognizing Compensated vs. Hypotensive Shock
PALS divides pediatric shock into two stages, and treatment urgency increases with each. In compensated shock, the child’s body is still maintaining blood pressure through a faster heart rate and tighter blood vessels. You’ll see tachycardia, slightly delayed capillary refill around 3 seconds, irritability, decreased urine output, and cool or warm skin depending on the cause. Blood pressure may still read normal at this point.
Late or uncompensated shock is marked by falling blood pressure, capillary refill longer than 4 seconds, mottled and cool extremities, weak pulses, and altered consciousness ranging from agitation to unresponsiveness. A quick rule for minimum acceptable systolic blood pressure in children: 70 + 2 times the child’s age in years. Hypotension combined with capillary refill longer than 3 seconds carries a 33% mortality rate, which is why PALS emphasizes catching shock before it reaches this stage.
Initial Assessment and ABCs
Treatment starts with the standard PALS systematic approach. Airway, breathing, and circulation are assessed rapidly. The goal is to maintain oxygenation, ventilation, and heart rate within normal limits while restoring perfusion. Supplemental oxygen is given immediately. If the child cannot protect their airway or is in respiratory failure, ventilatory support is initiated. Simultaneously, the team establishes vascular access.
Establishing Vascular Access
Peripheral IV access is the first choice. However, children in shock often have collapsed veins that make IV placement difficult or impossible. When peripheral access fails, PALS guidelines call for intraosseous (IO) access as the immediate next step. IO access involves placing a needle into the bone marrow, typically in the shin, where fluids and medications can be delivered just as effectively as through a vein. This is not a last resort; it’s the standard second-line approach when peripheral access can’t be obtained quickly.
Fluid Resuscitation
Isotonic crystalloid (normal saline) is the foundation of initial shock treatment in PALS, especially for hypovolemic and septic shock. The standard bolus is 10 to 20 mL/kg, pushed rapidly. A single bolus improves circulation but rarely normalizes it completely, so boluses can be repeated while reassessing the child’s clinical status after each one.
The reassessment piece is critical. Fluid overload increases morbidity in pediatric patients, and data show that children who receive more than 60 mL/kg of crystalloid without improvement have lower survival rates. If a child needs more than 60 mL/kg and still isn’t responding, that signals a cause like sepsis or hemorrhage that fluids alone won’t fix.
One important exception: in suspected cardiogenic shock, the fluid approach changes dramatically. Boluses are smaller (5 to 10 mL/kg), given slowly over 10 to 20 minutes rather than pushed rapidly, and the team stops immediately if signs of heart failure worsen. Flooding a failing heart with volume can be lethal.
Treatment Targets During Resuscitation
PALS uses specific clinical endpoints to gauge whether treatment is working. The targets are capillary refill under 2 seconds, full pulses with warm extremities, urine output greater than 1 mL/kg/hour, improved mental status, and normal blood pressure for age. These are reassessed after every intervention. If the child hits these markers, the current approach is working. If not, treatment escalates.
Vasoactive Medications for Fluid-Refractory Shock
When fluid boluses fail to restore adequate perfusion, PALS moves to vasoactive medications, drugs delivered by continuous infusion that either strengthen the heart’s pumping or tighten blood vessels to raise blood pressure. The choice depends on what type of shock is present.
Septic shock is classified as either “cold” or “warm” based on the child’s skin and perfusion. Cold shock features cool, mottled skin and slow capillary refill, indicating that blood vessels are already clamped down but the heart isn’t pumping strongly enough. Epinephrine is the first-line agent here because it boosts heart output. Warm shock features flushed, warm skin with bounding pulses and fast capillary refill, indicating that blood vessels are too relaxed. Norepinephrine is first-line because it tightens vessels. Dopamine, once widely used, has fallen out of favor at many institutions in favor of these two agents.
Antibiotics in Septic Shock
For children with suspected septic shock, broad-spectrum antibiotics should be started as soon as possible, ideally within one hour of recognizing sepsis. This is a strong recommendation in the Surviving Sepsis Campaign guidelines, and the clock starts at the moment of recognition, not at hospital arrival. Delays in antibiotic administration directly increase mortality in septic shock.
Treatment by Shock Type
Hypovolemic Shock
Caused by fluid loss from dehydration, bleeding, or burns. Treatment centers on volume replacement with isotonic crystalloid boluses of 10 to 20 mL/kg. For hemorrhagic shock, blood products replace crystalloid once available. The key is identifying and stopping the source of fluid loss while replacing volume.
Distributive Shock
This category includes septic shock and anaphylactic shock. Septic shock treatment follows the fluid-then-vasopressor pathway described above, combined with early antibiotics. For anaphylaxis, intramuscular epinephrine is the cornerstone treatment, injected into the outer thigh at a dose of 0.01 mg/kg, up to 0.3 mg in prepubertal children and 0.5 mg in teenagers. Fluid boluses are also given because anaphylaxis causes massive fluid shifts out of blood vessels.
Cardiogenic Shock
Caused by heart failure, myocarditis, arrhythmias, or congenital heart disease. As noted above, fluids are given cautiously in small volumes. Treatment focuses on medications that help the heart pump more effectively (inotropes) and reducing the workload on the heart. Arrhythmias are treated according to PALS rhythm-specific algorithms.
Obstructive Shock
Caused by a physical obstruction to blood flow. Treatment depends entirely on identifying and relieving the obstruction. For tension pneumothorax (collapsed lung with pressure buildup), the intervention is needle decompression of the chest. For cardiac tamponade (fluid compressing the heart), treatment includes a fluid bolus to temporarily maintain filling, followed by pericardiocentesis to drain the fluid around the heart. Massive pulmonary embolism requires oxygen, ventilatory support, fluid boluses, and expert consultation. In newborns with certain congenital heart defects where the ductus arteriosus is closing, a prostaglandin infusion is started to keep it open.
Monitoring and Escalation
Throughout treatment, the PALS approach calls for continuous reassessment. Heart rate, blood pressure, capillary refill, mental status, and urine output are tracked to determine whether each intervention is helping. For children who remain in shock despite fluids and first-line vasopressors (refractory shock), advanced targets come into play: mixed venous oxygen saturation above 70% and cardiac index between 3.3 and 6.0 L/min/m², both measured with specialized monitoring in an intensive care setting. Therapies are adjusted to hit these targets, and the child typically requires pediatric critical care management at this stage.