A nurse is caring for a 1-month-old infant who has manifestations of severe dehydration and a prescription for parenteral fluid therapy. The guardian asks, "What are the indication that my baby needs an IV?" Which of the following responses should the nurse make?

Rationale: A. "Your baby needs an IV because she is breathing slower than normal.": Severe dehydration is more likely to cause tachypnea rather than slower breathing, as the body attempts to compensate for metabolic acidosis. B. "Your baby needs an IV because her heart rate is decreased.": Severe dehydration in infants usually results in tachycardia due to hypovolemia. A decreased heart rate may indicate impending cardiovascular collapse, which is a late and severe sign. C. "Your baby needs an IV because her fontanels are bulging.": Bulging fontanels suggest increased intracranial pressure, not dehydration. Dehydration typically causes sunken fontanels due to decreased fluid volume. D. "Your baby needs an IV because she is not producing tears.": Absence of tears during crying is a classic sign of significant dehydration in infants. This indicates reduced fluid volume and supports the need for IV therapy to restore hydration.