Correct Answer: B

Rationale: The correct answer is Hypokalemia. Furosemide is a loop diuretic that can lead to potassium depletion by increasing its excretion in the urine. Hypokalemia is a common and concerning side effect of furosemide therapy. Hyperkalemia (Choice A) is less likely as furosemide tends to lower potassium levels. Hyponatremia (Choice C) is more commonly seen with thiazide diuretics. Hypercalcemia (Choice D) is not directly associated with furosemide use.

Correct Answer: B

Rationale: Flat T waves are a characteristic ECG finding in hypokalemia. Hypokalemia causes a decrease in serum potassium levels, leading to altered cardiac conduction. Flat T waves are associated with hypokalemia-induced cardiac dysrhythmias. Elevated ST segments are typically seen in conditions like myocardial infarction, not in hypokalemia. Bradycardia is not a typical manifestation of hypokalemia; instead, tachycardia may occur due to potassium imbalances affecting the heart's electrical activity.

Correct Answer: C

Rationale: The correct answer is C: Teach the client pursed-lip breathing technique. Pursed-lip breathing helps clients with COPD improve oxygenation and reduce shortness of breath. Choice A is incorrect because deep breathing and coughing are not recommended every 4 hours for clients with COPD. Choice B is incorrect because a diet high in carbohydrates and low in protein is not specifically indicated for COPD. Choice D is incorrect because fluid restriction is not a standard intervention for COPD unless the client has comorbid conditions that necessitate it.

Correct Answer: A

Rationale: The most appropriate action when a patient is experiencing severe dehydration is to administer IV fluids. This intervention is crucial in rapidly correcting dehydration and restoring fluid balance. Encouraging oral fluids may not be sufficient in cases of severe dehydration where intravenous rehydration is needed. Monitoring electrolytes is important but administering fluids takes precedence in severe dehydration. Performing a neurological exam is not the primary intervention for severe dehydration.

Correct Answer: B

Rationale: The correct answer is B. A weight gain of 1 kg (2.2 lb) in 24 hours is concerning as it indicates fluid retention, which can be a sign of complications in clients receiving chemotherapy. Rapid weight gain can be associated with conditions like fluid overload or electrolyte imbalances, which need prompt medical attention. Choices A, C, and D are not typically immediate concerns related to chemotherapy. Alopecia (choice A) is a common side effect of chemotherapy, a white blood cell count of 6,000/mm³ (choice C) falls within the normal range, and a temperature of 37.2°C (99°F) (choice D) is slightly elevated but not a critical finding in this context.