Probably useful. In a study of 32 infants, 2–24 months of age, who had diarrhea, a CRT of <1.5 seconds was
found to be indicative of a <50 mL/kg deficit or of a normal infant; 1.5–3.0 seconds suggested a deficit
between 50–100 mL/kg, and >3 seconds suggested a deficit of >100 mL/kg. Conversely, in 30 age-matched
normal controls, CRT was 0.81–0.31 seconds. Yet, in another study of approximately 5000 children
evaluated in an emergency ward, a CRT >3 seconds was a poor predictor of the need for either intravenous
fluid bolus or hospital admission.
found to be indicative of a <50 mL/kg deficit or of a normal infant; 1.5–3.0 seconds suggested a deficit
between 50–100 mL/kg, and >3 seconds suggested a deficit of >100 mL/kg. Conversely, in 30 age-matched
normal controls, CRT was 0.81–0.31 seconds. Yet, in another study of approximately 5000 children
evaluated in an emergency ward, a CRT >3 seconds was a poor predictor of the need for either intravenous
fluid bolus or hospital admission.