which disorder is characterized by demyelination of neurons in the central nervous system
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HESI LPN

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. At the first dressing change, the PN tells the client that her mastectomy incision is healing well, but the client refuses to look at the incision and refuses to talk about it. Which response by the PN to the client's silence is best?

Correct answer: B

Rationale: Acknowledging the client's feelings and providing emotional support without pressuring them to look at the incision is important. Choice B is the best response as it respects the client's emotional readiness to confront their body image changes. The client's autonomy and emotional needs are prioritized in this response. Choice A may invalidate the client's feelings by assuming the incision is not as bad as they think, potentially dismissing their emotions. Choice C is insensitive as it imposes a particular view of recovery on the client, disregarding their current emotional state. Choice D may escalate the situation by suggesting the need for another nurse, which could make the client feel uncomfortable and pressured.

3. A client is admitted to the postoperative surgical unit with two test tubes after a left lobectomy. The nurse observed that the chambers are set at the prescribed suction of 20 cm water pressure, and tidying occurs with respirations and bubbling. What action should the nurse implement?

Correct answer: C

Rationale: Maintaining system integrity is essential to promote lung reexpansion in postoperative patients with chest tubes. Clamping the chest tube abruptly can lead to tension pneumothorax, a life-threatening condition. The bubbling observed is a normal sign indicating that the system is functioning correctly, as it allows the drainage of air or fluid from the pleural space. Notifying the registered nurse may be necessary if there are significant concerns or changes observed, but the immediate action should be to ensure system integrity and lung reexpansion.

4. During a routine prenatal visit at the antepartal clinic, a multipara at 35-weeks gestation presents with 2+ edema of the ankles and feet. Which additional information should the PN report to the RN?

Correct answer: B

Rationale: Blood pressure is the most critical information to report to the RN in this scenario. The presence of edema, along with high blood pressure, can be indicative of preeclampsia, a severe condition in pregnancy. Monitoring blood pressure is essential for assessing the patient's condition and taking appropriate actions if necessary. Choices A, C, and D are not as urgent in this situation. The due date, gravida, and parity are important for overall assessment but do not address the immediate concern of potential preeclampsia. Fundal height is used to assess fetal growth and position but is not the priority when edema and high blood pressure are present.

5. A nurse who receives a patient in the operative suite prior to the actual surgery is in charge of the patient’s care. Which of the following is NOT a task related to the nurse’s intraoperative care?

Correct answer: A

Rationale: The correct answer is A. Going over the surgical procedure with the patient is typically done preoperatively, not intraoperatively. Intraoperative tasks of a nurse involve strictly adhering to asepsis during procedures, monitoring the patient's physical status, and providing emotional support to the patient and their family during the surgery. Choices B, C, and D are all tasks that are directly related to the nurse's responsibilities during the intraoperative phase of care.

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