Nursing Elites

1. Who would have the greatest percentage of body water?

• A. an obese male
• B. a nonobese male
• C. a nonobese female
• D. a newborn

Correct answer: D

Rationale: Newborns have a higher percentage of body water compared to adults due to their higher body fluid content. Factors such as the higher ratio of body surface area to body volume and lower body fat content contribute to this. This is why a newborn would have the greatest percentage of body water. Choices A, B, and C are incorrect because obesity and gender do not determine the percentage of body water in individuals. Therefore, the correct answer is a newborn.

2. A nurse is caring for a client who is experiencing excessive diarrhea. The clients arterial blood gas values are pH 7.28, PaO2 98 mm Hg, PaCO2 45 mm Hg, and HCO3 16 mEq/L. Which provider order should the nurse expect to receive?

• A. Furosemide (Lasix) 40 mg intravenous push
• B. Sodium bicarbonate 100 mEq diluted in 1 L of D5W
• C. Mechanical ventilation
• D. Indwelling urinary catheter

Correct answer: B

Rationale:

3. A newly graduated nurse is admitting a patient with a long history of emphysema. The new nurses preceptor is going over the patients past lab reports with the new nurse. The nurse takes note that the patients PaCO2 has been between 56 and 64 mm Hg for several months. The preceptor asks the new nurse why they will be cautious administering oxygen. What is the new nurses best response?

• A. The patients calcium will rise dramatically due to pituitary stimulation.
• B. Oxygen will increase the patients intracranial pressure and create confusion.
• C. Oxygen may cause the patient to hyperventilate and become acidotic.
• D. Using oxygen may result in the patient developing carbon dioxide narcosis and hypoxemia.

Correct answer: D

Rationale:

4. What electrolyte value should be monitored when a patient is receiving a loop diuretic?

• A. Calcium levels
• B. Phosphorus levels
• C. Potassium levels
• D. Magnesium levels

Correct answer: C

Rationale: When a patient is receiving a loop diuretic like furosemide (Lasix), potassium levels should be monitored closely. Loop diuretics act on the ascending loop of Henle to inhibit the reabsorption of sodium and water, leading to potassium loss. Monitoring potassium levels is crucial to prevent hypokalemia, which can result in serious complications such as cardiac arrhythmias. Calcium levels (Choice A), phosphorus levels (Choice B), and magnesium levels (Choice D) are not typically affected directly by loop diuretics and do not require routine monitoring in this context.

5. The chief mechanism for maintaining fluid balance is to:

• A. adjust fluid intake so it equals fluid output.
• B. adjust fluid intake so it is slightly above fluid output.
• C. adjust fluid output so it equals fluid input.
• D. adjust fluid intake so it is slightly below fluid output.

Correct answer: C

Rationale: The correct answer is C: 'adjust fluid output so it equals fluid input.' Maintaining fluid balance involves ensuring that the amount of fluid lost through processes like urination, sweating, and respiration equals the amount of fluid taken in. This ensures that the body stays properly hydrated. Choices A, B, and D are incorrect because they do not focus on the balance between fluid input and output, which is crucial for maintaining proper fluid balance. By adjusting fluid output to equal fluid input, the body can regulate hydration levels effectively, preventing dehydration or overhydration.

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