Pediatric HESI Practice Questions

Correct Answer: A

Rationale: The correct answer is A: Incisors. In infants, incisors are usually the first teeth to erupt, typically around 6 months of age. These are the front teeth used for cutting food. Canines (Choice B), upper molars (Choice C), and lower molars (Choice D) typically erupt after the incisors. Canines are sharp teeth used for tearing food, while molars are flat teeth used for grinding food.

Correct Answer: B

Rationale: In the scenario described, the priority is to relieve pressure from the umbilical cord protruding from the vaginal opening by gently pushing it back inside using your gloved fingers. This action helps prevent cord compression, maintains blood flow to the fetus, and ensures fetal oxygenation. Massaging the uterus (Choice A) is not appropriate in this situation as it can potentially worsen the cord compression. Placing the mother on her left side and providing rapid transport (Choice C) can be considered after relieving the pressure on the cord. Elevating the mother's lower extremities and providing immediate transport (Choice D) is not the correct approach when dealing with a visible umbilical cord; instead, the focus should be on relieving pressure from the cord to prevent fetal compromise.

Correct Answer: D

Rationale: Surgical repair of patent ductus arteriosus (PDA) aims to prevent increased pulmonary vascular congestion, which can lead to congestive heart failure and respiratory distress. Choice A, pulmonary infection, is not a direct complication of PDA but rather a result of other factors. Choice B, right-to-left shunt of blood, is a characteristic of a different heart condition (e.g., Tetralogy of Fallot) and not specifically associated with PDA. Choice C, decreased workload on the left side of the heart, is not a typical complication of PDA but rather a consequence of left-to-right shunting that can cause volume overload in the pulmonary circulation.

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: 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.