which disorder is characterized by demyelination of neurons in the central nervous system
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HESI PN Exit Exam 2023

1. Which disorder is characterized by demyelination of neurons in the central nervous system?

Correct answer: A

Rationale: Multiple sclerosis is the correct answer. It is an autoimmune disease that specifically targets and damages the myelin sheath surrounding neurons in the central nervous system. This demyelination disrupts the transmission of nerve signals and leads to a variety of neurological symptoms. Parkinson's disease (Choice B), Alzheimer's disease (Choice C), and Huntington's disease (Choice D) are neurodegenerative disorders that do not primarily involve demyelination of neurons in the CNS. Parkinson's disease is characterized by the loss of dopamine-producing neurons, Alzheimer's disease by the formation of plaques and tangles in the brain, and Huntington's disease by a genetic mutation affecting nerve cells.

2. Based on the computer documentation in the EMR, which action should the PN implement?

Correct answer: A

Rationale: The rubella vaccine is crucial for preventing rubella infection, which can cause severe congenital disabilities if contracted during pregnancy. Administering the vaccine subcutaneously is the correct action based on EMR documentation. Observing breastfeeding, calling the nursery for blood type results, and administering pain medication are not indicated by the EMR documentation and are not relevant to the situation described in the question.

3. In which stage of Maslow's hierarchy of needs is a young adult attempting to achieve when deciding to change his work hours to devote more time to his community?

Correct answer: A

Rationale: The correct answer is A: Self-Actualization. The young adult is striving for self-actualization, the highest level in Maslow's hierarchy of needs. Self-actualization is characterized by individuals seeking personal growth, self-fulfillment, and the ability to contribute to society. Choice B, Intimacy vs. Isolation, focuses on relationships and occurs at a different stage. Choice C, Altruism, although related to community contribution, does not specifically address personal growth and fulfillment as in self-actualization. Choice D, Purposefulness, is not a stage in Maslow's hierarchy of needs and is not directly relevant to the scenario described.

4. A registered nurse is preparing to hang the first bag of total parenteral nutrition (TPN) solution. The client has a central line, and this is the first bag he will receive. Which of the following is the most essential piece of equipment to obtain prior to hanging the bag?

Correct answer: C

Rationale: An electronic infusion pump is essential for administering TPN to ensure accurate delivery and avoid complications such as fluid overload or improper nutrient delivery. The pump helps regulate the flow rate precisely, which is crucial when infusing TPN. Monitoring the client's blood glucose is important but not immediately necessary before hanging the TPN bag. A noninvasive blood pressure monitor is not directly related to administering TPN and is not the most essential equipment needed for this procedure. Urine test strips are not required for administering TPN via a central line and are not essential equipment for this specific task.

5. A client with a recent total knee replacement is scheduled for physical therapy. The client refuses to participate, stating that the pain is too intense. What should the nurse do first?

Correct answer: A

Rationale: Administering pain medication before physical therapy helps manage the pain, making it easier for the client to participate in the necessary exercises to improve recovery and prevent complications such as joint stiffness. Choice B is not the first step as addressing the pain should take precedence. Choice C is important but should come after managing the pain to facilitate participation. Choice D involves another healthcare provider and is not the immediate action needed in this situation.

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