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. A client who had a hip replacement is being prepared for discharge. What should the nurse include in the discharge teaching to prevent hip dislocation?

Correct answer: A

Rationale: The correct answer is A: 'Avoid crossing your legs at the knees or ankles.' Crossing legs at the knees or ankles can cause excessive stress on the new hip joint, leading to a risk of dislocation. Choice B is incorrect because sleeping on the side of the operated hip can also increase the risk of dislocation. Choice C is incorrect as sitting in low chairs with knees higher than hips is a recommended position to prevent hip dislocation. Choice D is incorrect because bending forward at the waist to pick up objects can strain the hip joint and increase the risk of dislocation.

3. A female client who has been taking oral contraceptives for the past year comes to the clinic for an annual exam. Which finding is most important for the PN to report to the HCP?

Correct answer: C

Rationale: Left calf pain could indicate deep vein thrombosis (DVT), a serious side effect of oral contraceptives. Reporting this finding to the healthcare provider is critical for further evaluation and treatment. Breast tenderness and change in menstrual flow are common side effects of oral contraceptives and may not be as urgent as left calf pain. Weight gain of 5 pounds, while noteworthy, is not as concerning as a possible indication of DVT.

4. A client tells the PN that she has a family history of cancer and has increased the amount of dairy products in her diet to reduce her risk of getting cancer. How should the PN respond?

Correct answer: D

Rationale: Increasing fruits and vegetables in the diet is more beneficial in reducing cancer risk due to their high levels of antioxidants and fiber, which help protect against cancer. While exercise is important for overall health, in this context, focusing on fruits and vegetables is more relevant to reducing cancer risk than exercise alone. Providing information about cancer warning signs is not directly addressing the client's dietary choice. While Vitamin D is essential for various health aspects, the primary focus here should be on a diet rich in fruits and vegetables for cancer risk reduction.

5. The nurse enters a male client's room to administer routine morning medications, and the client is on the phone. Which action is best for the nurse to take?

Correct answer: B

Rationale: The best action for the nurse to take in this situation is to wait for the client to excuse himself from the telephone conversation and then observe the client taking the medication. This approach ensures that the client takes the medication as prescribed, promoting compliance and safety. Choice A is not ideal as it involves unnecessary delegation and may lead to confusion. Choice C is incorrect because assuming refusal without direct communication can compromise patient care. Choice D is not recommended as leaving the medication with the client unsupervised may result in non-compliance or potential errors.

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