A one-year-old child has been ill with multiple episodes of emesis and diarrhea. After securing airway, providing high-flow O2 and establishing an IV you should?

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In a dehydrated child from gastroenteritis, the priority after securing the airway, giving oxygen, and establishing IV access is rapid restoration of circulating volume with an isotonic fluid bolus. The standard initial dose is 20 mL/kg given quickly, typically over a few minutes. If perfusion remains poor after that bolus, you can repeat boluses up to a total of about 60 mL/kg, reassessing after each one.

For this one-year-old, a bolus of roughly 320 mL reflects 20 mL/kg for a child around 16 kg, aimed at quickly improving perfusion (BP, capillary refill, and urine output). The other options either provide too little volume to correct shock or too much at once, risking overload. After delivering the bolus, continue to monitor vitals and perfusion and repeat as needed based on reassessment.