Correct Answer: A

Rationale: The correct answer is A. A hemoglobin level of 12 g/dL is an indicator of effective erythropoietin therapy as it shows an increase in red blood cell production. Reticulocyte count (choice B) reflects the bone marrow's response to anemia but does not directly confirm the effectiveness of erythropoietin therapy. Blood pressure (choice C) and serum ferritin level (choice D) are not specific indicators of the effectiveness of erythropoietin therapy for chronic kidney disease.

Correct Answer: D

Rationale: The drainage of clear, pale yellow fluid from the chest tube is an indication of proper chest tube functioning. Clear, pale yellow fluid signifies normal drainage from the pleural space without any signs of infection or complications. Choices A, B, and C are incorrect because continuous bubbling in the water-seal chamber, no fluctuation in the water-seal chamber, and intermittent bubbling in the suction control chamber are all indications of potential issues or malfunctioning of the chest tube system, which would require further assessment and intervention.

Correct Answer: C

Rationale: A temperature of 99°F (37.2°C) in a postoperative client requires immediate intervention as it may indicate the presence of infection. Elevated temperature post-surgery can be a sign of surgical site infection or systemic infection, which can lead to serious complications if not addressed promptly. Monitoring and managing a fever in a postoperative client is crucial to prevent further complications. The other findings, such as a heart rate of 90 beats per minute, oxygen saturation of 92%, and pain at the surgical site, are common postoperative assessments that may not necessarily require immediate intervention unless they are significantly out of normal range or causing severe distress to the client.

Correct Answer: D

Rationale: The correct first action for a client receiving TPN with an elevated blood glucose level is to check the TPN infusion rate. Elevated blood glucose levels in clients receiving TPN can be due to incorrect infusion rates leading to increased glucose delivery. By checking the TPN infusion rate, the nurse can verify if the rate is appropriate and make necessary adjustments. Stopping the TPN infusion abruptly could lead to complications from sudden nutrient deprivation. Administering insulin as prescribed may be necessary but should come after ensuring the correct TPN infusion rate. Notifying the healthcare provider is important but addressing the immediate need to check the infusion rate takes priority to manage hyperglycemia effectively.

Correct Answer: D

Rationale: In a client with diabetic ketoacidosis (DKA), urine output of 50 mL in 4 hours indicates oliguria, which is a concerning sign of decreased renal perfusion and potential renal failure. This finding requires immediate intervention to prevent further deterioration of kidney function.\n\nChoice A (Blood glucose of 200 mg/dL) is elevated but not the most urgent concern in this scenario. Choice B (Serum bicarbonate of 20 mEq/L) reflects metabolic acidosis, which is expected in DKA but does not require immediate intervention. Choice C (Blood pressure of 140/90 mm Hg) is slightly elevated but not acutely concerning in the context of DKA.