Pediatric Assessment: Triage and Primary Assessment of Children

The Pediatric Assessment Triangle (PAT) is a rapid, hands-off tool for forming a general impression of a child’s physiologic status within the first 30 to 60 seconds of an encounter, before any equipment is touched or the child is disturbed. It consists of three components: appearance, work of breathing, and circulation to skin. Appearance reflects brain perfusion and oxygenation. Work of breathing looks for abnormal airway sounds (stridor, grunting, wheezing), positioning (tripoding, sniffing), retractions, nasal flaring, and head bobbing, and is a more sensitive marker of respiratory compromise than respiratory rate alone. Circulation to skin evaluates pallor, mottling, slow capillary refill, and cyanosis as visible indicators of core perfusion, since children preserve central blood flow by shunting it away from the skin. Together, abnormalities in these three domains allow the clinician to categorize the child’s problem, such as respiratory distress, respiratory failure, shock (compensated or decompensated), primary CNS or metabolic dysfunction, or cardiopulmonary failure, and to judge urgency.

The PAT matters because children often compensate for serious illness until they abruptly decompensate, and vital signs can be unreliable, hard to obtain in a frightened child, or normal until late in the course. Because the PAT requires no equipment and can be done from the doorway, it fits naturally into triage, helping staff quickly separate sick from not-sick children, prioritize those who need immediate resuscitation, and begin treatment while a more detailed primary survey (ABC) follows. It also gives a common language for communicating severity among nurses, paramedics, and physicians, and its use is well suited to low-resource settings where monitors and lab testing are limited. Its limitations are worth remembering: it is a general impression rather than a diagnosis, it depends on observer experience, and it should be repeated as the child’s condition evolves and followed promptly by a full assessment and intervention when any side of the triangle is abnormal.

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