Correct Answer: D

Rationale: The correct answer is D because the inability to complete sentences without pausing indicates respiratory distress and the need for immediate intervention. This finding suggests an increased work of breathing and inadequate oxygenation. Choices A, B, and C are not as urgent as choice D. Feeling short of breath (choice A) is expected in pneumonia but does not necessarily indicate the need for immediate intervention. An oxygen saturation of 92% (choice B) is slightly below the normal range but may not require immediate intervention. A respiratory rate of 20 breaths per minute (choice C) is within the normal range and does not signify an urgent need for intervention.

Correct Answer: B

Rationale: Erythropoietin therapy stimulates red blood cell production in clients with chronic kidney disease. Hemoglobin levels should be monitored to assess the effectiveness of the therapy and ensure the client is not developing anemia. Increased hemoglobin levels indicate successful treatment, whereas very high levels may suggest erythropoietin is overcorrecting the anemia. Monitoring the white blood cell count is not directly related to erythropoietin therapy for anemia. Serum creatinine level is used to assess kidney function rather than the effectiveness of erythropoietin therapy. Platelet count is not typically affected by erythropoietin therapy and is not a key indicator of its effectiveness.

Correct Answer: D

Rationale: The correct answer is D: Reduced preload. Furosemide is a diuretic that reduces fluid overload in heart failure, which lowers the preload (the volume of blood in the ventricles before contraction). By reducing this volume, furosemide improves symptoms of heart failure. While furosemide may lead to increased urine output and lower blood pressure, these effects are secondary to the reduction in preload. Decreased heart rate is not a direct effect of furosemide in heart failure.

Correct Answer: B

Rationale: The correct answer is B. Rifampin can cause red-orange discoloration of bodily fluids, including urine, saliva, and tears. This is a harmless side effect, but clients should be informed beforehand to prevent alarm. Choice A is incorrect as orange-colored urine is not a sign of kidney dysfunction related to rifampin. Choice C is incorrect because rifampin is more commonly associated with liver toxicity rather than kidney dysfunction. Choice D is incorrect as vision changes are not a typical side effect of rifampin.

Correct Answer: D

Rationale: Sudden loss of consciousness in a client with a suspected stroke is the most concerning finding as it indicates a more severe neurological event, such as brain stem involvement or hemorrhage, requiring immediate intervention. While unilateral facial droop, slurred speech, and weakness in one arm are all common signs of a stroke, sudden loss of consciousness signifies a critical condition that needs urgent attention and evaluation to prevent further complications.