Pediatrics HESI 2023

Correct Answer: B

Rationale: The correct answer is B: Tissue oxygen needs. Polycythemia occurs as the body's response to chronic hypoxia by increasing RBC production to enhance oxygen delivery. In tetralogy of Fallot, a congenital heart defect, the heart's structure causes reduced oxygen levels in the blood. This chronic hypoxia stimulates the bone marrow to produce more red blood cells, leading to an elevated RBC count. Choice A is incorrect as low blood pressure is not directly related to polycythemia in this context. Choice C, diminished iron level, is not the cause of polycythemia in tetralogy of Fallot. Choice D, hypertrophic cardiac muscle, is not the primary cause of the elevated RBC count in this case.

Correct Answer: C

Rationale: The correct answer is C: 'The child has given up fighting and accepts the separation.' This response indicates that the child is emotionally withdrawing due to the separation from the parent during hospitalization. Choice A is incorrect because the child's behavior does not necessarily suggest repressed feelings for the parent. Choice B is incorrect as feeling safe due to established routines does not fully explain the child's behavior. Choice D is incorrect because while feeling better physically may contribute to improved behavior, it does not address the emotional aspect of the child's reaction to the parent.

Correct Answer: A

Rationale: Placing the infant on their back to sleep is the correct recommendation to reduce the risk of sudden infant death syndrome (SIDS). This sleep position has been shown to significantly decrease the incidence of SIDS. Using a pacifier during sleep (Choice B) can also help reduce the risk, but it is secondary to the back sleeping position. Having the infant sleep on their side (Choice C) is not recommended, as it increases the risk of SIDS. Keeping the infant's room cool (Choice D) may provide a comfortable sleeping environment but does not directly reduce the risk of SIDS.

Correct Answer: B

Rationale: The correct answer is to monitor for signs of dehydration. After treatment for dehydration, it is crucial to educate caregivers about recognizing early signs of dehydration to prevent its recurrence. Monitoring for dehydration ensures that appropriate measures can be taken promptly if signs reappear. Choices A, C, and D are incorrect because infection, hypovolemia, and malnutrition, while important considerations in healthcare, are not the primary focus after treating dehydration in a 3-year-old child.

Correct Answer: B

Rationale: In atopic dermatitis, the characteristic presentation includes a dry, red, scaly rash with lichenification. This appearance is due to chronic inflammation and scratching. Choice A is incorrect as erythematous papulovesicular rash is more indicative of conditions like contact dermatitis. Choice C is incorrect as pustular vesicles with honey-colored exudates are seen in impetigo. Choice D is incorrect as hypopigmented oval scaly lesions are more characteristic of tinea versicolor.