How do I assess dehydration in a pediatric patient?

Summary

Assess pediatric dehydration by integrating history with physical exam findings—specifically, looking for signs such as weight loss estimates, prolonged capillary refill, abnormal skin turgor, sunken eyes or fontanelle, altered mental status, and poor oral intake. No single sign is diagnostic; rather, a combination of findings improves accuracy ^1^2.

At-a-glance

ParameterMild/Moderate DehydrationSevere Dehydration
Weight Loss~5–10% loss>10% loss
Capillary RefillProlonged (>2 secs in moderate cases)Markedly prolonged (>3 secs)
Skin TurgorDelayed (skin pinch visible for <2 seconds)Very slow (>2 seconds; “skin pinch” remains elevated)
Mental StatusRestlessness or irritabilityLethargy, altered consciousness
Eyes/FontanelleSunken eyes (or fontanelle in infants)Deeply sunken with additional features
Oral Intake/ThirstEager drinker but thirstyDrinking poorly or not at all
Other FindingsDry mucous membranes, decreased tearsSigns of shock: weak, rapid pulse, cool/mottled extremities

Evidence from FOAM sources highlights that using a combination of these clinical indicators—not just one isolated sign—helps accurately assess the degree of dehydration ^1^2/^3. Additional tools like the CHANDLER assessment can also be used to flag red flags beyond dehydration, particularly when making hospitalization decisions ^5.

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