Pediatric HESI Practice Questions

Correct Answer: C

Rationale: The correct answer is C. Infants receive passive immunity through antibodies from the mother during pregnancy and breastfeeding, which protect them initially. Choice A is incorrect because a 6-week-old infant born without an immune system would not be able to limit exposure to pathogens effectively. Choice B is incorrect as antibodies produced by colonic bacteria are not a significant source of immunity in infants. Choice D is incorrect as the fetal thymus primarily plays a role in T cell development rather than antibody production during gestation.

Correct Answer: A

Rationale: The correct action would be to notify the doctor immediately. Unrelenting pain despite medication can indicate compartment syndrome, which is a medical emergency requiring immediate attention. Applying ice, elevating the arm, or giving additional pain medication may not address the underlying cause of the unrelenting pain, which could be a sign of a serious complication like compartment syndrome. Prompt medical evaluation is crucial in this situation to prevent potential complications.

Correct Answer: A

Rationale: Monitoring fluid status is crucial for a child with congenital heart disease because these children are at risk of fluid overload which can worsen their condition. Monitoring fluid intake and output helps prevent complications like congestive heart failure. Encouraging activity (Choice B) should be individualized based on the child's condition and tolerance, as excessive activity can strain the heart. Promoting a high-calorie diet (Choice C) is not typically recommended for children with congenital heart disease unless specifically indicated, as excessive weight gain can worsen their cardiac function. Maintaining oxygen therapy (Choice D) may be necessary in some cases, but monitoring fluid status is a more fundamental aspect of care for children with congenital heart disease.

Correct Answer: B

Rationale: The correct answer is B: Epiphysis. Bone growth primarily occurs in the epiphysis, which is the area where growth plates are located. The epiphysis is responsible for longitudinal bone growth. Choice A, 'Growth plate,' is incorrect as it does not specify the exact area where bone growth primarily occurs. Choice C, 'Physis,' refers to the same structure as a growth plate, but the term 'epiphysis' is more specific to bone growth. Choice D, 'Metaphysis,' is incorrect as it is the area of the bone where the epiphysis meets the diaphysis, not the primary site of bone growth.

Correct Answer: D

Rationale: The correct answer is 'D. Low-grade fever.' A low-grade fever is a common and mild side effect of the Hib vaccine, indicating that the immune system is responding to the immunization. Lethargy (choice A) can be a sign of more serious adverse effects and should be monitored closely but is not typically associated with the Hib vaccine. Urticaria (choice B) and generalized rash (choice C) are less common side effects of the Hib vaccine compared to low-grade fever.