Nursing Elites

1. The nurse discovers that an elderly client with no history of cardiac or renal disease has an elevated serum magnesium level. To further investigate the cause of this electrolyte imbalance, what information is most important for the nurse to obtain from the client's medical history?

• A. Frequency of laxative use for chronic constipation
• B. Dietary intake of magnesium-rich foods
• C. Use of magnesium-containing supplements
• D. History of alcohol use

Correct answer: A

Rationale: The correct answer is A. Frequent use of magnesium-containing laxatives can lead to hypermagnesemia, particularly in elderly clients. Option B, dietary intake of magnesium-rich foods, may contribute to elevated serum magnesium levels but is less likely the cause in this scenario. Option C, the use of magnesium-containing supplements, can also contribute to hypermagnesemia but is not as common in elderly clients without a history of using such supplements. Option D, history of alcohol use, is less relevant to the development of elevated serum magnesium levels compared to laxative use for chronic constipation.

2. A client who is at 36 weeks gestation is admitted with severe preeclampsia. After a 6-gram loading dose of magnesium sulfate is administered, an intravenous infusion of magnesium sulfate at a rate of 2 grams/hour is initiated. Which assessment finding warrants immediate intervention by the nurse?

• A. Urine output of 20 ml/hour
• B. Blood pressure of 138/88
• C. Respiratory rate of 18 breaths/min
• D. Temperature of 99.8°F

Correct answer: A

Rationale: A urine output of less than 30 ml/hour indicates that the kidneys are being affected by the high level of magnesium sulfate. This decreased urine output can lead to magnesium toxicity and impaired kidney function. Blood pressure of 138/88 is within normal limits for pregnancy and does not indicate an immediate concern related to magnesium sulfate. A respiratory rate of 18 breaths/min is normal, and a temperature of 99.8°F is slightly elevated but not a priority in the context of severe preeclampsia and magnesium sulfate administration.

3. The healthcare provider prescribes an IV solution of isoproterenol (Isuprel) 1 mg in 250 ml of D5W at 300 mcg/hour. The nurse should program the infusion pump to deliver how many ml/hour?

• A. 50 ml/hour
• B. 25 ml/hour
• C. 75 ml/hour
• D. 100 ml/hour

Correct answer: C

Rationale: To calculate the infusion rate, convert 1 mg to 1,000 mcg (1 mg = 1,000 mcg) and then use the formula D/H x Q, where D is the desired dose, H is the dose on hand, and Q is the quantity of solution. In this case, it would be 300 mcg/hour / 1,000 mcg x 250 ml = 75 ml/hour. Therefore, the nurse should program the infusion pump to deliver 75 ml/hour. Choice A (50 ml/hour), Choice B (25 ml/hour), and Choice D (100 ml/hour) are incorrect as they do not correspond to the calculated rate of 75 ml/hour.

4. A client with a tracheostomy has thick, tenacious secretions. Which intervention should the nurse implement first?

• A. Perform deep suctioning every 2 to 4 hours.
• B. Encourage the client to drink plenty of fluids.
• C. Increase humidity in the client's room.
• D. Administer a mucolytic agent.

Correct answer: C

Rationale: Increasing humidity in the client's room can help liquefy thick secretions and facilitate easier airway clearance in a client with a tracheostomy. This intervention should be implemented first as it is non-invasive and can often effectively address the issue of thick secretions. Performing deep suctioning (Choice A) should not be the first intervention as it is more invasive and should be done based on assessment findings. Encouraging the client to drink plenty of fluids (Choice B) is beneficial but may not provide immediate relief for thick secretions. Administering a mucolytic agent (Choice D) requires a healthcare provider's prescription and should be based on assessment data and the client's condition.

5. In a client with heart failure receiving digoxin (Lanoxin) and furosemide (Lasix), which laboratory value requires immediate intervention?

• A. Serum potassium of 4.0 mEq/L
• B. Blood glucose of 200 mg/dl
• C. Serum creatinine of 1.5 mg/dl
• D. Serum potassium of 3.2 mEq/L

Correct answer: D

Rationale: A serum potassium level of 3.2 mEq/L is low and concerning in a client receiving digoxin and furosemide. Hypokalemia increases the risk of digoxin toxicity, leading to life-threatening arrhythmias. Therefore, immediate intervention is necessary to prevent complications. The other options, serum potassium of 4.0 mEq/L, blood glucose of 200 mg/dl, and serum creatinine of 1.5 mg/dl, are within normal limits and do not pose immediate risks to the client in this scenario.

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