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 post-thoracotomy is complaining of severe pain with deep breathing and coughing. What should the nurse encourage the client to do to manage the pain and prevent respiratory complications?

Correct answer: A

Rationale: Splinting the chest with a pillow helps manage pain during deep breathing and coughing, which is essential to prevent respiratory complications such as atelectasis or pneumonia after thoracic surgery. Holding a pillow against the chest while coughing (splinting) supports the incision site and reduces the pain associated with deep breathing and coughing. Encouraging shallow breaths (Choice B) can lead to respiratory complications due to inadequate lung expansion. Increasing pain medication (Choice C) should be done based on healthcare provider orders and not solely for this situation. Avoiding deep breathing exercises (Choice D) can worsen respiratory function and increase the risk of complications.

3. The UAP is caring for a male resident of a long-term care facility who has an external urinary catheter. Which finding should the PN instruct the UAP to report immediately?

Correct answer: A

Rationale: The correct answer is A: Swollen and discolored penile shaft. Swelling and discoloration of the penile shaft may indicate an infection or other complications requiring immediate attention. Prompt reporting allows for timely intervention to prevent further harm to the client. Choice B is incorrect because the prepuce extending over the head of the penis is not an urgent issue. Choice C, leaking urine around the catheter, may require intervention but is not as urgent as the swelling and discoloration described in choice A. Choice D, moist and excoriated perineal skin folds, also needs attention but is not as concerning as the potential complications indicated by the findings in choice A.

4. While ambulating in the hallway following an appendectomy yesterday, a client complains of chest tightness and shortness of breath. Which action should the nurse implement first?

Correct answer: C

Rationale: Having the client sit down in the hallway is the first action the nurse should implement. This is crucial to prevent further strain on the heart and to provide a safer environment for assessment and potential emergency intervention. Administering sublingual nitroglycerin (Choice A) may be appropriate later but should not precede ensuring the client's immediate safety. Assisting the client back to the room (Choice B) may not be advisable if the client is experiencing chest tightness and shortness of breath. Obtaining a 12-lead electrocardiogram (Choice D) is important but would not be the initial action to address the client's immediate symptoms.

5. The nurse is preparing to provide wound care for a client. Which step should be done first?

Correct answer: A

Rationale: The correct answer is to don procedural gloves first. Donning procedural gloves is essential to protect the nurse from contaminants while removing the old dressing. This step helps maintain aseptic technique and prevents the transfer of microorganisms. Removing the dressing (choice B) should follow after wearing gloves to prevent the spread of pathogens. Applying prescribed medications (choice C) should be done after the wound is cleaned and dressed. Donning a pair of sterile gloves (choice D) is not necessary for initial wound care; procedural gloves are sufficient for standard wound care.

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