The parents of a child with acid-base imbalance ask the nurse about mechanisms that regulate acid-base balance. Which statement by the nurse accurately explains the mechanisms regulating acid-base balance in children?

The most important factor in determining the rate of fluid replacement in a dehydrated child
is urine output. Urine output is a crucial indicator of renal perfusion and hydration status.
Monitoring urine output allows healthcare professionals to assess the child's response to fluid
replacement therapy and adjust the rate accordingly.
The type of dehydration in (Option A) is incorrect. The type of dehydration, is important in
determining the appropriate fluid composition for rehydration but does not directly dictate the
rate of fluid replacement.

The child’s weight in (Option B) is incorrect. The child's weight, is considered when
calculating the maintenance fluid requirements, but it does not solely determine the rate of
fluid replacement for dehydration.
Serum potassium level in (Option D) is incorrect. The serum potassium level, is important to
monitor in a dehydrated child, especially in cases of severe dehydration, as electrolyte
imbalances may occur. However, it is not the most important factor in determining the rate of
fluid replacement. Fluid replacement is primarily guided by assessing the child's hydration
status through parameters such as urine output and clinical assessment.

When caring for a child with an open fracture, the nurse should carefully assess for signs and symptoms of infection. An open fracture refers to a fracture where the bone is exposed through the skin, creating a direct pathway for microorganisms to enter and cause infection. Infection is a significant concern in open fractures and can lead to serious complications if not identified and treated promptly. Signs of infection may include increased pain, swelling, redness, warmth, purulent drainage, fever, or systemic signs of infection such as elevated white blood cell count.

Osteoarthritis in (option A) is incorrect because it, is not an immediate concern in the care of a child with an open fracture. Osteoarthritis refers to degenerative joint disease that typically develops over time and is not directly related to the acute management of an open fracture.

epiphyseal disruption in (option B) is incorrect because it, refers to an injury involving the growth plate (epiphyseal plate) that can affect bone growth and development. While it is a potential concern in fractures that involve the growth plate, it is not specific to open fractures and may not be an immediate priority in the initial assessment of an open fracture.

periosteum thickening in (option D) is incorrect because it, may occur in response to injury and fracture healing, but it is not specifically associated with open fractures and is not a primary focus in the initial assessment of an open fracture.