Correct Answer: C

Rationale: A urine output of 30 mL/hr is significantly low and indicates possible renal impairment or inadequate perfusion to the kidneys, which are critical for postoperative recovery. In this situation, decreased urine output could lead to fluid and electrolyte imbalances, affecting the client's overall condition. The nurse should report this finding promptly to the healthcare provider for further evaluation and intervention. Serosanguineous wound drainage is a normal finding in the early postoperative period and does not typically warrant immediate concern. A heart rate of 90/min is within the normal range and may be expected in a postoperative client due to the stress response. A temperature of 37.3°C (99.1°F) is slightly elevated but not a concerning finding in isolation postoperatively.

Correct Answer: B

Rationale: The correct answer is Hypokalemia. Hypokalemia is the most concerning electrolyte imbalance for a patient receiving digoxin because it can increase the risk of digoxin toxicity. Low potassium levels can potentiate the effects of digoxin on the heart, leading to serious cardiac arrhythmias. Hyperkalemia (Choice A) is not typically associated with digoxin use. Hyponatremia (Choice C) and Hypercalcemia (Choice D) are not directly related to digoxin therapy and do not pose the same risk of toxicity.

Correct Answer: A

Rationale: The best method to monitor fluid balance in a patient receiving diuretics is to monitor daily weight. Daily weighing is a precise way to assess changes in fluid status as it reflects variations in total body water. Monitoring intake and output (choice B) is also important but may not provide as accurate a measurement as daily weight. Monitoring blood pressure (choice C) is essential but does not directly measure fluid balance. Monitoring edema (choice D) is helpful to assess fluid status visually but may not be as sensitive as daily weight measurements in detecting subtle changes in fluid balance.

Correct Answer: C

Rationale: A urine output of 30 mL/hr is significantly low and indicates possible renal impairment or inadequate perfusion to the kidneys, which are critical for postoperative recovery. In this situation, decreased urine output could lead to fluid and electrolyte imbalances, affecting the client's overall condition. The nurse should report this finding promptly to the healthcare provider for further evaluation and intervention. Serosanguineous wound drainage is a normal finding in the early postoperative period and does not typically warrant immediate concern. A heart rate of 90/min is within the normal range and may be expected in a postoperative client due to the stress response. A temperature of 37.3°C (99.1°F) is slightly elevated but not a concerning finding in isolation postoperatively.

Correct Answer: A

Rationale: Administering diuretics is the appropriate management for fluid overload in a patient with heart failure. Diuretics help to reduce fluid retention by increasing urine output, thereby alleviating the fluid overload. Choices B, C, and D are incorrect. Increasing fluid intake would worsen the condition by adding more fluid to an already overloaded system. Providing oral fluids is not specific enough to address the excess fluid in the body, and chest physiotherapy is not indicated for managing fluid overload in heart failure patients.