A child weighing 12.6 kg requires a 20 mL/kg fluid bolus to be administered over 25 minutes.

What is the infusion rate in milliliters per hour (mL/hr) that the nurse should set on the IV pump? Round your answer to the nearest tenth and enter only digits (not units).

Choice A rationale

The ultimate hemodynamic consequence of a left-to-right shunt through an unrepaired Atrial Septal Defect (ASD) is chronic volume overload in the pulmonary vasculature. The most appropriate long-term goal is to decrease pulmonary vascular resistance (PVR) to prevent the progression of pulmonary hypertension and eventual reversal of the shunt (Eisenmenger syndrome). Normal PVR is low, typically ∼0.5-1.5 Wood units.

Choice B rationale

An Atrial Septal Defect (ASD) results in a left-to-right shunt and is an acyanotic heart defect, meaning the child is not expected to have cyanotic episodes unless Eisenmenger syndrome (shunt reversal due to severe pulmonary hypertension) develops, which is a late-stage complication. Therefore, "remaining free from cyanotic episodes" is an expected baseline, not the most appropriate primary therapeutic goal.

Choice C rationale

Atrial enlargement, particularly of the right atrium, is a consequence of the chronic volume overload caused by the left-to-right shunting across the Atrial Septal Defect (ASD). It is an undesirable pathophysiological finding, not an appropriate goal of care. The goal is to prevent or minimize these structural changes by addressing the underlying shunt.

Choice D rationale

While maintaining normal blood pressure is a general health goal, the primary problem with an Atrial Septal Defect (ASD) is pulmonary volume overload and subsequent pulmonary hypertension, not systemic hypotension. The goal blood pressure for a child varies significantly by age and is not the most specific or critical hemodynamic parameter for this particular congenital heart defect.

Choice A rationale

Epiglottitis is a rapidly progressive, life-threatening bacterial infection causing severe swelling of the epiglottis, potentially leading to acute, complete upper airway obstruction. The most critical initial nursing action is to minimize distress and be immediately prepared for definitive airway management (intubation or tracheostomy) by the appropriate team, as the airway can close suddenly.

Choice B rationale

Racemic epinephrine is an α-adrenergic agonist used to cause vasoconstriction and reduce subglottic edema, primarily indicated for croup. Epiglottitis involves supraglottic swelling, and while it may theoretically reduce edema, the primary risk is mechanical obstruction, making preparation for airway management the priority.

Choice C rationale

While prompt intravenous antibiotic administration is essential to treat the causative bacterium, usually Haemophilus influenzae type b, this action is secondary to securing a patent airway. A patient can die from asphyxiation much faster than from bacteremia, thus airway security must be addressed first.

Choice D rationale

Attempting to obtain a throat culture in a child with suspected epiglottitis is contraindicated. Any manipulation of the posterior pharynx or epiglottis, such as using a tongue blade or swab, can trigger laryngospasm and cause immediate, complete airway obstruction, which is a catastrophic complication.