Pediatric HESI Test Bank

Correct Answer: D

Rationale: The correct answer is D. Infants have a higher extracellular fluid requirement per unit of body weight, making them more susceptible to dehydration and electrolyte imbalances during illnesses such as diarrhea. Choice A is incorrect because cellular metabolism being unstable is not the primary explanation for the symptoms described. Choice B is incorrect as the proportion of water in the body alone does not fully explain the increased risk of dehydration in infants. Choice C is incorrect because while renal function is immature in children, it is not the most relevant factor in this scenario compared to the increased fluid requirements.

Correct Answer: C

Rationale: Tetralogy of Fallot is characterized by a combination of four specific cardiac defects: right ventricular hypertrophy, ventricular septal defect, pulmonic stenosis, and overriding aorta. Choice A is incorrect as it includes mitral valve stenosis, which is not typically part of tetralogy of Fallot. Choice B describes transposition of the great arteries rather than tetralogy of Fallot. Choice D includes an atrial septal defect, which is not part of the classic presentation of tetralogy of Fallot.

Correct Answer: B

Rationale: The priority nursing intervention for a child admitted with bacterial meningitis is isolating the child. Isolation is crucial to prevent the spread of the highly contagious infection to other patients and healthcare workers. Administering antibiotics (Choice A) is important but isolating the child takes precedence to contain the spread of the infection. Monitoring vital signs (Choice C) and administering fluids (Choice D) are essential aspects of care but do not address the immediate need to prevent transmission of the infection.

Correct Answer: B

Rationale: Upright positioning is the most appropriate intervention to promote maximum chest expansion in a child with Duchenne muscular dystrophy. By keeping the child in an upright position, lung expansion is maximized, which improves breathing efficiency. Deep-breathing exercises may help with overall lung function but do not directly promote chest expansion. Coughing and chest percussion are more related to airway clearance and do not specifically address maximizing chest expansion.

Correct Answer: A

Rationale: Tachypnea, which refers to rapid breathing, is an early sign of congestive heart failure. In heart failure, the heart's inability to pump efficiently can lead to fluid accumulation in the lungs, causing the child to breathe faster to try to compensate for the decreased oxygen exchange. Bradycardia (slow heart rate) is not typically associated with congestive heart failure; instead, it may indicate a different issue. Inability to sweat is not a common early sign of congestive heart failure. Increased urinary output is not a typical early sign of congestive heart failure; instead, it may be a sign of other conditions like diabetes or kidney issues.