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. Rehabilitation after illness is classified under which level of healthcare?

Correct answer: C

Rationale: Rehabilitation after illness is classified as tertiary care. Tertiary care aims to help patients recover from illness, injuries, or disabilities, and restore their functionality. Primary care involves preventive measures and early disease detection, while secondary care focuses on diagnosis and treatment of specific conditions. Therefore, choices A, B, and D are incorrect as they do not specifically address the specialized nature of rehabilitation in healthcare.

3. What is the priority intervention for a patient experiencing an acute asthma attack?

Correct answer: A

Rationale: Administering a bronchodilator is the priority intervention in an acute asthma attack. Bronchodilators help to quickly open the airways, relieve bronchospasm, and improve breathing. Encouraging the patient to drink fluids may be beneficial for other conditions but is not the priority in an acute asthma attack. Applying a high-flow oxygen mask may be necessary in severe cases of respiratory distress but is not the initial priority when managing an acute asthma attack. Performing chest physiotherapy is not indicated as the primary intervention for an acute asthma attack and may not address the immediate need to open the airways and improve breathing.

4. A nurse is assisting in the admission of a young adult female Korean exchange student with acute abdominal pain. When asked about her sexual activity, she looks away. What should the nurse do?

Correct answer: D

Rationale: Observing the client's response to a different question can help gauge her comfort level and understanding, which is essential in culturally sensitive care. By watching her response to a different question, the nurse can assess if the discomfort is related to the specific question or a broader issue. Omitting the question may result in missing crucial information. Asking about an interpreter assumes that the language barrier is the only issue, which may not be the case. Rewording the question may not address the underlying discomfort and could still lead to misinterpretation.

5. A client is post-operative day two from a total hip arthroplasty. The nurse notices the surgical wound is red and warm to the touch. What is the most appropriate action?

Correct answer: D

Rationale: The correct action when a nurse notices redness and warmth at the surgical wound post total hip arthroplasty is to notify the healthcare provider. These signs may indicate an infection, and prompt evaluation by the healthcare provider is crucial to initiate appropriate treatment. Applying an ice pack (Choice A) may not address the underlying issue of a potential infection. Monitoring the client's temperature (Choice B) is important but not the priority when signs of infection are present. Documenting the findings and continuing to monitor (Choice C) is necessary but should be accompanied by notifying the healthcare provider for further assessment and intervention.

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