3.2 Recognition & Immediate Intervention Priorities

Who Needs Immediate Intervention?

PALS is built around a simple operational rule: after a rapid general impression (Pediatric Assessment Triangle) and as you move through the primary assessment, you intervene the moment you identify a life-threatening problem. You do not finish every checklist item before acting. Evaluate–identify–intervene is a continuous loop, not a one-way form.

Categories that demand immediate action

Children who appear "tired," "sleepy," or "quietly working hard" after a long respiratory illness are high risk. Immediate intervention is driven by physiology, not by whether the parent describes the problem as an emergency.

Cardiopulmonary failure

Cardiopulmonary failure means the child can neither oxygenate/ventilate adequately nor perfuse tissues adequately. Typical picture: depressed mentation, weak or absent pulses or poor central pulses, mottled or cyanotic skin, and inadequate breathing. This state is often the last step before pulseless arrest. Treat it as an emergency requiring simultaneous respiratory support and circulatory support—not sequential "finish the respiratory algorithm, then start the shock algorithm" thinking.

On the skills station, verbalize that you recognize cardiopulmonary failure, call for help/code team, open the airway, begin bag-mask ventilation with oxygen, check pulse quickly, and be ready to start compressions if heart rate is less than 60/min with poor perfusion despite adequate oxygenation and ventilation (bradycardia algorithm—covered later) or if the child is pulseless.

When Arrest Is Present: CPR Within 10 Seconds

The 2025 AHA Guidelines and PALS provider materials emphasize that once cardiac arrest is recognized, high-quality CPR must begin within 10 seconds. Delay is deadly because coronary and cerebral perfusion fall to zero the moment effective cardiac output stops.

Recognition cues in children

• Unresponsive to voice and tactile stimulation.
• No normal breathing, or only agonal gasps.
• No definite central pulse within a brief check (≤10 seconds). If unsure whether a pulse is present, start compressions.

Do not spend extra time confirming a faint pulse while the child is apneic and unresponsive. Do not wait for a monitor to display asystole before starting compressions if clinical arrest is clear. Attach the monitor/defibrillator as soon as available, but hands on the chest first when arrest is recognized.

Link to respiratory disease

Because so many pediatric arrests begin as respiratory failure, the "immediate intervention" skill is often preventing arrest with early bag-mask ventilation rather than performing prolonged CPR later. Exam vignettes may show a child in failure who still has a pulse—your correct action is aggressive airway and ventilation support, not waiting until the pulse disappears. Another vignette may show the same child 2 minutes later, now pulseless—your correct action is immediate CPR.

Single-rescuer vs team reality

• Lone rescuer: Activate emergency response as appropriate for setting, begin CPR, use AED/defibrillator when available.
• Team setting (ED, ward, prehospital crew): Parallel roles—one rescuer compresses, one opens airway and ventilates, one attaches monitor/defibrillator, one obtains access. Closed-loop communication keeps priorities clear (Chapter 14).

The exam cares that you know the time standard (start CPR within 10 seconds of recognizing arrest) and that you do not invert priorities (for example searching for IV access before starting compressions in a pulseless child).

Early Support of Oxygenation and Ventilation

For the child who is still breathing but failing, PALS immediate priorities are deliberately basic and fast:

1. Open the airway

• Use head-tilt–chin-lift if no trauma concern.
• Use jaw-thrust without head extension if cervical-spine injury is possible.
• For infants, keep the head in a neutral or slightly sniffing position—avoid extreme hyperextension that kinks the soft trachea.
• For children, a mild sniffing position often aligns the oral, pharyngeal, and tracheal axes.

2. Clear the airway

• Suction the mouth and nose when secretions, blood, or vomitus obstruct airflow.
• Limit suction passes; hyperoxygenate before and after when possible in monitored settings.
• Remove visible foreign material carefully; do not perform blind finger sweeps.

3. Provide oxygen

• Give the highest appropriate concentration for the acutely ill hypoxemic child while you reassess.
• Move from blow-by or low-flow devices to higher-flow masks as severity increases (device details in Section 3.3).
• Attach pulse oximetry early, but do not withhold oxygen while waiting for a perfect SpO2 waveform if the child is in obvious distress or failure.

4. Assist ventilation when indicated

Begin bag-mask ventilation when:

• The child is apneic or has only gasping breaths.
• Respiratory rate or tidal volume is clearly inadequate.
• Severe respiratory failure is present despite a patent airway and oxygen.
• Mental status is depressed enough that protective airway reflexes and effective breathing are unreliable.

Deliver breaths that produce visible chest rise—not excessive volume. Overventilation increases intrathoracic pressure, impairs venous return, and can worsen outcomes. In the respiratory-failure (pulse-present) setting, ventilate at an age-appropriate rate with just enough volume for chest rise; during CPR, follow pediatric BLS compression–ventilation ratios until an advanced airway is placed (later chapters).

5. Reassess constantly

After each intervention, reassess breathing effort, chest rise, color, SpO2 trend, heart rate, and mentation. Improvement means continue and treat the cause. No improvement or deterioration means escalate (better seal, airway adjunct, two-person bag-mask, advanced airway per protocol, prepare for CPR).

Do Not Delay Care for Equipment Perfection

A recurring megacode failure is freezing while searching for the ideal mask size, waiting for the "right" oxygen connector, or postponing bag-mask ventilation until capnography, IV access, and a full monitor suite are in place. PALS explicitly prioritizes timely basic interventions over delayed advanced ones.

Practical application

• If the perfect pediatric mask is not immediately available, use the best-fitting mask you have and create a seal; adjust as better equipment arrives.
• If a nonrebreather is not in the room, start with a simple mask or even effective blow-by while a teammate brings higher-flow equipment—something is better than room air delay for the hypoxemic failing child.
• If pulse oximetry will not read because of poor perfusion or motion, treat the clinical picture; do not withhold oxygen or ventilation waiting for a number.
• Do not delay assisted ventilation to place an advanced airway if bag-mask is effective. Advanced airways have a role, but ineffective delays kill.
• History, full SAMPLE, and secondary survey are important—but they run in parallel with, not ahead of, ABC support.

Team behaviors that match the priority list

• Team leader announces the life threat in one sentence: "This is respiratory failure—open the airway and bag with oxygen."
• Airway provider reports chest rise and rate.
• Another teammate applies monitors and pulse oximetry without interrupting ventilation.
• Medications and diagnostics follow once oxygenation and ventilation are addressed (or simultaneously if staffing allows).

Clinical scenario (synthesis)

A 9-month-old with bronchiolitis is brought to the resuscitation bay. The infant is lethargic, has shallow irregular respirations at 10/min, central cyanosis, and a heart rate of 70/min. This is respiratory failure with bradycardia risk. Immediate interventions: position the airway (neutral), suction the nose, begin bag-mask ventilation with oxygen, reassess heart rate and perfusion. Do not first spend minutes obtaining a full history or waiting for a blood gas. If heart rate remains under 60/min with poor perfusion despite adequate ventilation and oxygenation, start CPR per the bradycardia algorithm. If the infant becomes pulseless, start CPR within 10 seconds of that recognition.

Section 3.3 details oxygen delivery devices, SpO2 teaching targets, bag-mask technique, and OPA/NPA selection so you can execute these priorities with exam-level precision.