HESI Fundamental Practice Exam

Correct Answer: A

Rationale: The correct intervention is to assist the client back to bed. A decrease in oxygen saturation while ambulating indicates hypoxemia, and the immediate priority is to stabilize oxygen levels. Returning the client to bed allows for rest and decreased oxygen demand, potentially preventing further desaturation. Encouraging continued ambulation (Choice B) may worsen the hypoxemia by increasing oxygen demand. Obtaining portable oxygen (Choice C) is essential but should not delay addressing the low oxygen saturation. Moving the oximetry probe (Choice D) may not address the underlying cause of decreased oxygen saturation and should not be the first intervention.

Correct Answer: B

Rationale: The correct answer is autonomy. Autonomy is the ethical principle that upholds an individual's right to make decisions about their healthcare, including the choice to refuse treatment or surgery. In this scenario, the client's decision not to have surgery despite the recommendation is an exercise of autonomy. Choice A, fidelity, refers to being faithful and keeping promises, which is not applicable in this situation. Choice C, justice, pertains to fair and equal distribution of resources and treatment, not the individual's right to make decisions. Choice D, nonmaleficence, relates to the obligation to do no harm, which is not directly applicable to the client's decision to refuse surgery.

Correct Answer: A

Rationale: The correct location to auscultate the aortic valve is the second intercostal space to the right of the sternum. This area corresponds to the aortic valve area where aortic valve sounds are best heard. Choices B, C, and D are incorrect for auscultating the aortic valve. The fifth intercostal space to the left of the sternum is where the mitral valve is best heard, the third intercostal space to the left of the sternum is where the pulmonic valve is best heard, and the fourth intercostal space at the midclavicular line is where the tricuspid valve is best auscultated.

Correct Answer: B

Rationale: To calculate the correct rate of infusion, divide the total volume by the total time: 250 ml / 4 hours = 62.5 ml/hour, which is rounded up to 63 ml/hour. This rate ensures the proper administration of the KCl over the 4-hour period. Choice A (13 ml/hour) is incorrect as it does not match the calculated rate. Choices C (80 ml/hour) and D (125 ml/hour) are also incorrect as they do not correspond to the calculated rate needed for the specified time frame.

Correct Answer: C

Rationale: The correct action for the nurse to take first is to identify the client's typical bedtime routine. Understanding the client's sleep habits, environment, and bedtime rituals can provide valuable insight into potential factors contributing to their sleep troubles. Teaching stress reduction techniques (choice A) may be beneficial but should come after understanding the client's routine. Recommending avoiding caffeine intake in the evening (choice B) and encouraging regular daytime exercise (choice D) are important interventions, but identifying the bedtime routine takes precedence as it directly addresses the client's immediate concern.