Pediatrics HESI 2023

Correct Answer: A

Rationale: The correct recommendation to reduce the risk of SIDS in infants is to place them on their back to sleep. This sleeping position helps prevent the occurrence of SIDS by maintaining an open airway and reducing the risk of suffocation. Using a pacifier during sleep has also shown some protective effect against SIDS, but it is not as effective as placing the infant on their back. Having the infant sleep on their side is not recommended as it can increase the risk of accidental suffocation. Keeping the infant's room cool does not directly reduce the risk of SIDS.

Correct Answer: B

Rationale: The correct answer is B: Tissue oxygen needs. Polycythemia occurs in response to chronic hypoxia, leading the body to increase red blood cell production to enhance oxygen delivery. In tetralogy of Fallot, a congenital heart defect that results in reduced oxygen levels in the blood, the body compensates by producing more red blood cells. Choice A is incorrect as low tissue oxygen needs would not trigger polycythemia. Choice C, diminished iron levels, is not the cause of polycythemia in this case. Choice D, hypertrophic cardiac muscle, is unrelated to the pathophysiology of polycythemia in tetralogy of Fallot.

Correct Answer: A

Rationale: A heart rate below 100 beats/min in a newborn indicates the need for positive pressure ventilation to improve oxygenation. Providing positive pressure ventilations helps in assisting the newborn's breathing efforts to ensure adequate oxygenation. Choice B, providing blow-by oxygen, may not be sufficient to address the underlying issue of inadequate breathing. Choice C, assessing the newborn's skin condition and color, is important but not the most immediate action needed for a heart rate below 100 beats/min. Choice D, starting chest compressions, is not indicated as the infant is breathing spontaneously and has a heart rate, albeit lower than normal, which does not warrant chest compressions.

Correct Answer: C

Rationale: Low-set ears with lobe creases are often associated with genetic disorders, such as Down syndrome, and can indicate underlying chromosomal abnormalities. This physical characteristic is a common feature seen in various genetic syndromes. The other choices, including feeding problems, weight and height measurements, and motor skills, are not typically specific indicators of genetic disorders in the absence of other associated features.

Correct Answer: B

Rationale: Choosing option B, 'Buy a soda and hamburger to eat,' is the most appropriate action for an adolescent with type 1 diabetes experiencing an insulin reaction during a basketball game. In this situation, the individual is likely experiencing hypoglycemia, and consuming a soda provides a quick source of sugar to raise blood glucose levels rapidly. The hamburger can offer a more sustained release of energy due to its protein and fat content. Option A is incorrect because while contacting parents for help may be necessary in some situations, immediate action to address hypoglycemia is crucial. Option C is incorrect because administering insulin would further lower blood sugar levels, worsening the condition. Option D is incorrect as leaving the arena without addressing the hypoglycemia can lead to a worsening of symptoms and potentially dangerous outcomes.