the nurse is measuring the frontal occipital circumference foc of a 3 months old infant and notes that the foc has increased 5 inches since birth and
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HESI RN

HESI Pediatric Practice Exam

1. The nurse is measuring the frontal occipital circumference (FOC) of a 3-month-old infant and notes that the FOC has increased by 5 inches since birth, and the child's head appears large in relation to body size. Which action is most important for the nurse to take next?

Correct answer: B

Rationale: Palpating the anterior fontanel for tension and bulging is crucial in assessing for increased intracranial pressure. In this scenario, the infant's large head size and rapid increase in the frontal occipital circumference raise concerns for potential issues such as hydrocephalus. Measuring the head-to-toe length (Choice A) is not the priority when assessing for increased intracranial pressure. Observing for sunken eyes (Choice C) is more indicative of dehydration rather than increased intracranial pressure. While plotting the measurement on the infant's growth chart (Choice D) is important for tracking growth, it does not address the immediate concern of assessing for increased intracranial pressure.

2. The healthcare provider is assessing an infant with pyloric stenosis. Which pathophysiological mechanism is the most likely consequence of this infant's clinical picture?

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.

3. The infant scheduled for reduction of intussusception passes a soft-formed brown stool the day before the scheduled procedure. Which intervention should the nurse implement?

Correct answer: B

Rationale: Notifying the healthcare provider is crucial in this situation because the passage of a brown stool may indicate the resolution of intussusception. It is important to keep the healthcare provider informed about any changes in the infant's condition to ensure appropriate care and management. Instructing the parents that the infant needs to be NPO (nothing by mouth) is not necessary based on the passage of brown stool. Obtaining a stool specimen for laboratory analysis is not indicated in this scenario since the brown stool is likely a positive sign. Asking about recent changes in the infant's diet is not the priority at this moment as notifying the healthcare provider takes precedence.

4. During a well-baby check, the nurse hides a block under the baby's blanket, and the baby looks for the block. Which normal growth and development milestone is the baby developing?

Correct answer: D

Rationale: When a baby looks for a hidden object, it demonstrates the development of object permanence. This milestone is significant as it signifies the baby's understanding that objects continue to exist even when they are not visible. It is a crucial aspect of cognitive development in infancy. Choice A, separation anxiety, refers to distress when separated from a primary caregiver and is not demonstrated in this scenario. Choice B, associative play, involves interactive play with others and is not relevant to object search. Choice C, object prehension, refers to the ability to grasp and hold objects, which is not specifically demonstrated by looking for a hidden object in this context.

5. The child is 3 years old and is 2 hours postop from a cardiac catheterization via the right femoral artery. Which assessment finding indicates arterial obstruction?

Correct answer: B

Rationale: A cool, pale, and blanched foot is indicative of arterial obstruction, leading to poor blood flow. This finding requires immediate intervention to prevent further complications such as tissue damage or necrosis. Monitoring for signs of arterial compromise, such as color changes, temperature, and capillary refill, is crucial in detecting and managing vascular complications post-cardiac catheterization. Choices A, C, and D do not directly indicate arterial obstruction. While a decreasing blood pressure and rapid, irregular pulse may suggest compromise, these findings are more nonspecific. A weaker pulse distal to the femoral artery indicates reduced perfusion but not necessarily arterial obstruction. Finally, a damp, oozing pressure dressing suggests a dressing issue rather than arterial obstruction.

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