HESI RN
Leadership HESI Quizlet
1. Nurse Wayne is aware that a positive Chvostek's sign indicates:
- A. Hypocalcemia
- B. Hyponatremia
- C. Hypokalemia
- D. Hypermagnesemia
Correct answer: A
Rationale: A positive Chvostek's sign indicates hypocalcemia. This sign is elicited by tapping the facial nerve anterior to the ear, resulting in facial muscle twitching due to increased neuromuscular irritability from low calcium levels. Hyponatremia (Choice B) is characterized by low sodium levels, but it does not present with Chvostek's sign. Hypokalemia (Choice C) is low potassium levels, and hypermagnesemia (Choice D) is high magnesium levels, neither of which are associated with Chvostek's sign.
2. What intervention should the healthcare provider include in the plan of care for a client receiving treatment with an Unna's paste boot for leg ulcers due to chronic venous insufficiency?
- A. Check capillary refill of toes on the lower extremity with the Unna's paste boot.
- B. Apply dressing to the wound area before applying the Unna's paste boot.
- C. Wrap the leg from the knee down towards the foot.
- D. Remove the Unna's paste boot every 8 hours to assess wound healing.
Correct answer: A
Rationale: When an Unna's paste boot is applied for leg ulcers due to chronic venous insufficiency, it is crucial to check the capillary refill of the toes on the lower extremity to ensure adequate circulation. The Unna's paste boot can become rigid after drying, potentially affecting circulation distally. Monitoring capillary refill helps assess the perfusion status of the distal extremity and ensures that the treatment is not compromising circulation to the toes.
3. What intervention should the nurse implement first for a male toddler brought to the emergency center approximately three hours after swallowing tablets from his grandmother's bottle of digoxin (Lanoxin)?
- A. Administer activated charcoal
- B. Prepare gastric lavage
- C. Obtain a 12-lead electrocardiogram
- D. Give IV digoxin immune fab (Digibind)
Correct answer: A
Rationale: Administering activated charcoal is the priority intervention as it binds with digoxin, preventing further absorption in the gastrointestinal tract. This helps reduce the amount of digoxin available for systemic circulation and minimizes its toxic effects. Gastric lavage is no longer recommended due to potential complications and lack of evidence of efficacy. Obtaining an electrocardiogram may help assess the effects of digoxin toxicity, but it is not the initial priority. IV digoxin immune fab (Digibind) is used in severe cases of digoxin toxicity but is not the first-line intervention.
4. A client with hyperthyroidism is prescribed methimazole. The nurse should instruct the client that the purpose of this medication is to:
- A. Decrease thyroid hormone production
- B. Increase thyroid hormone production
- C. Suppress the immune system
- D. Prevent thyroid storm
Correct answer: A
Rationale: The correct answer is A: Decrease thyroid hormone production. Methimazole works by inhibiting the synthesis of thyroid hormones, specifically by blocking the enzyme responsible for this process. By reducing the production of thyroid hormones, methimazole helps to normalize the elevated levels seen in hyperthyroidism. Choices B, C, and D are incorrect. Choice B, 'Increase thyroid hormone production,' is inaccurate as methimazole actually decreases thyroid hormone production. Choice C, 'Suppress the immune system,' is unrelated to the mechanism of action of methimazole. Choice D, 'Prevent thyroid storm,' is not the primary purpose of methimazole; while it may help prevent worsening of hyperthyroidism, its main action is to reduce thyroid hormone levels.
5. The Punnett square shows that one parent carries the recessive gene for a cleft chin (c) while the other parent does not. What percentage of the parents' offspring is predicted to have a cleft chin?
- A. 25%
- B. 50%
- C. 0%
- D. 75%
Correct answer: C
Rationale: The correct answer is 0%. If one parent carries the recessive gene for a cleft chin while the other parent does not, none of the offspring will express the recessive phenotype. This is because in order for a child to have a cleft chin, they would need to inherit the recessive gene from both parents. Therefore, although the offspring could be carriers of the gene, none are predicted to have a cleft chin. Choices A, B, and D are incorrect because the presence of the recessive gene in one parent and its absence in the other would not result in any offspring showing the cleft chin trait.