HESI RN
HESI Pediatrics Practice Exam
1. The healthcare provider is assessing an infant with pyloric stenosis. Which pathophysiological mechanism is the most likely consequence of this infant's clinical picture?
- A. Metabolic alkalosis.
- B. Respiratory acidosis.
- C. Metabolic acidosis.
- D. Respiratory alkalosis.
Correct answer: A
Rationale: Pyloric stenosis leads to obstruction at the outlet of the stomach, causing frequent vomiting and loss of stomach acids. This results in a loss of hydrochloric acid and hydrogen ions, leading to metabolic alkalosis due to an increase in serum bicarbonate levels. Therefore, the correct answer is metabolic alkalosis. Choice B, respiratory acidosis, is incorrect as it is not typically associated with pyloric stenosis. Choice C, metabolic acidosis, is incorrect because the loss of stomach acids in pyloric stenosis leads to metabolic alkalosis, not acidosis. Choice D, respiratory alkalosis, is also incorrect as it is not the usual consequence of pyloric stenosis.
2. When caring for a 5-year-old child with a history of seizures who suddenly begins to have a tonic-clonic seizure, what should the nurse do first?
- A. Administer oxygen
- B. Insert an oral airway
- C. Turn the child to the side
- D. Start an IV line
Correct answer: C
Rationale: During a tonic-clonic seizure, the priority action is to turn the child to the side. This helps maintain an open airway and prevents aspiration of secretions or vomitus. It also helps in keeping the airway clear and promotes safety during the seizure episode. Administering oxygen, inserting an oral airway, and starting an IV line are important interventions but should follow the initial step of positioning the child to prevent airway obstruction.
3. What information should be reinforced with the parents about introducing solid foods to their infant?
- A. Begin with one tablespoon of the food.
- B. Introduce each food 4 to 7 days apart.
- C. Mix the new food with rice cereal.
- D. Remove foods when the infant refuses them.
Correct answer: B
Rationale: The correct answer is B. Introducing solid foods 4 to 7 days apart is crucial as it allows time to identify any allergic reactions or intolerances to specific foods. This gradual introduction helps parents monitor their infant's response to new foods and pinpoint any potential issues, ensuring the infant's safety and well-being. Choices A, C, and D are incorrect because starting with one tablespoon of the food, mixing new food with rice cereal, and removing foods when the infant refuses them are not recommended practices for introducing solid foods to infants.
4. Which drink choice on a hot day indicates that a teenager with sickle cell anemia understands dietary considerations related to the disease?
- A. Milkshake
- B. Iced tea
- C. Diet cola
- D. Lemonade
Correct answer: D
Rationale: Lemonade is the correct choice for a teenager with sickle cell anemia as it provides hydration without caffeine, which is important for individuals with this condition. Caffeine can lead to dehydration, vasoconstriction, and potentially worsen symptoms in sickle cell anemia patients. Milkshake (choice A) may contain dairy, which can be high in fat and may not be the best choice for someone with sickle cell anemia. Iced tea (choice B) and diet cola (choice C) both contain caffeine, which should be avoided by individuals with sickle cell anemia due to its dehydrating effects.
5. What intervention should the nurse implement first for a male toddler brought to the emergency center approximately three hours after swallowing tablets from his grandmother's bottle of digoxin (Lanoxin)?
- A. Administer activated charcoal
- B. Prepare gastric lavage
- C. Obtain a 12-lead electrocardiogram
- D. Give IV digoxin immune fab (Digibind)
Correct answer: A
Rationale: Administering activated charcoal is the priority intervention as it binds with digoxin, preventing further absorption in the gastrointestinal tract. This helps reduce the amount of digoxin available for systemic circulation and minimizes its toxic effects. Gastric lavage is no longer recommended due to potential complications and lack of evidence of efficacy. Obtaining an electrocardiogram may help assess the effects of digoxin toxicity, but it is not the initial priority. IV digoxin immune fab (Digibind) is used in severe cases of digoxin toxicity but is not the first-line intervention.
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