which electrolyte imbalance is most likely to cause cardiac arrhythmias
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Nursing Elites

HESI LPN

PN Exit Exam 2023 Quizlet

1. Which electrolyte imbalance is most likely to cause cardiac arrhythmias?

Correct answer: A

Rationale: Hyperkalemia is the correct answer as it can lead to dangerous cardiac arrhythmias due to its effects on the electrical conduction of the heart. High levels of potassium can disrupt the normal electrical activity of the heart, potentially leading to life-threatening arrhythmias. Hypocalcemia (choice B) is not the most likely cause of cardiac arrhythmias compared to hyperkalemia. Hypernatremia (choice C), referring to high sodium levels, is not directly associated with causing cardiac arrhythmias. While hypokalemia (choice D), low potassium levels, can also lead to cardiac arrhythmias, hyperkalemia is the more likely culprit in causing severe disturbances in heart rhythm.

2. Which of the following is MOST LIKELY to increase the risk of a medication error?

Correct answer: B

Rationale: Errors in the calculation of medication dosages are a significant risk factor for medication errors. When dosage calculations are incorrect, it can lead to administering the wrong amount of medication, posing serious harm to the patient. Avoiding abbreviations for medications, barcoding medication orders, and utilizing unit dose dispensers are all strategies aimed at reducing medication errors by enhancing accuracy and safety. Therefore, choices A, C, and D are incorrect as they are practices that help decrease, rather than increase, the risk of medication errors.

3. After spinal fusion surgery, a client reports numbness and tingling in the legs. What should the nurse do first?

Correct answer: A

Rationale: After spinal fusion surgery, numbness and tingling in the legs may indicate nerve compression or damage. The priority action for the nurse is to assess the client’s neurovascular status in the lower extremities. This assessment will help determine the cause and severity of the symptoms, guiding further interventions. Repositioning the client may be necessary for comfort, but assessing neurovascular status is the initial step. Administering pain medication should only follow the assessment to address any discomfort. Notifying the healthcare provider immediately is not the first action unless there are emergent signs requiring urgent intervention.

4. A client who is at full-term gestation is in active labor and complains of a cramp in her leg. Which intervention should the PN implement?

Correct answer: D

Rationale: During labor, muscle cramps are common due to prolonged muscle tension. The correct intervention to alleviate a cramp in the leg is to extend the leg and flex the foot. This action helps relieve the muscle spasm by stretching and contracting the muscles. Massaging the calf and foot (Choice A) may not be as effective in relieving the cramp as extending and flexing the leg. Elevating the leg above the heart (Choice B) is not necessary and may not directly address the cramp. Checking the pedal pulse (Choice C) is important for assessing circulation, but it does not directly address the muscle cramp.

5. The single mother of a child with a head injury is sitting at the child's bedside crying when the PN enters the room. The mother states, 'Why did this happen to my child? I just can't cope with this.' How should the PN respond?

Correct answer: C

Rationale: Expressing empathy and acknowledging the mother's feelings helps in providing emotional support during a difficult time. This response validates her emotions and offers a comforting presence. Choice A is not appropriate as it focuses on gathering information rather than addressing the mother's emotional distress. Choice B may come off as dismissive of the mother's feelings and oversimplifies the complexity of the situation. Choice D shifts the responsibility to someone else instead of offering immediate support and comfort.

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