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: C

Rationale: The correct answer is Chickenpox (varicella). This viral disease typically starts with malaise and a highly pruritic rash that begins on the abdomen and then spreads to the face and proximal extremities. Chickenpox can result in serious complications such as pneumonia and encephalitis. Rubella (German measles) presents with a milder rash and is less pruritic than chickenpox. Rubeola (measles) is characterized by a rash that spreads from the head to the trunk. Scarlet fever is caused by group A Streptococcus bacteria and is not a viral illness.

Correct Answer: C

Rationale: Infants receive passive immunity through antibodies from the mother during pregnancy and breastfeeding, which protect them initially.

Correct Answer: C

Rationale: Choice C indicates a need for further teaching because not all products are clearly labeled as latex-free. It is essential for the mother to understand that she should not solely rely on product labels to determine latex content. She should be encouraged to verify with manufacturers and consult healthcare providers for accurate information. Choices A, B, and D are correct responses. Wearing a medical alert identification, informing caregivers, and ensuring the boy avoids all contact with latex are crucial steps in managing his sensitivity to latex and preventing potential allergic reactions.

Correct Answer: D

Rationale: The correct answer is D: increased pulmonary vascular congestion. Surgical repair of patent ductus arteriosus (PDA) aims to prevent the complications associated with increased pulmonary vascular congestion, such as pulmonary hypertension and heart failure. Choice A, pulmonary infection, is not a direct complication of PDA but can occur secondary to other conditions. Choice B, right-to-left shunt of blood, is a feature of some congenital heart defects but not a direct complication of PDA. Choice C, decreased workload on the left side of the heart, is not a primary reason for surgical repair of PDA, as the main concern is the impact on pulmonary circulation.