ATI Pediatrics Exam I | Nurselytic

Correct Answer: C

Rationale: The correct answer is C: Urine output. The rate of fluid replacement in a dehydrated child is primarily determined by monitoring urine output. Urine output reflects the child's renal function and hydration status. Adequate urine output indicates that the kidneys are able to excrete excess fluid, suggesting the child can tolerate more fluid intake. In contrast, low urine output indicates possible renal impairment or ongoing dehydration, requiring cautious fluid administration.

Choices A, B, and D are important considerations in overall management but do not directly determine the rate of fluid replacement.
Choice A (type of dehydration) guides the choice of fluid composition, B (child's weight) helps calculate maintenance fluid requirements, and D (serum potassium level) may guide electrolyte replacement but does not specifically dictate the rate of fluid administration.

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