Correct Answer: A

Rationale: The correct answer is to monitor potassium levels. Patients taking digoxin are at risk of developing toxicity due to hypokalemia. Low potassium levels can potentiate the toxic effects of digoxin on the heart, leading to serious arrhythmias. Monitoring calcium levels (Choice B) is not the primary concern in patients taking digoxin. While calcium levels play a role in cardiac function, hypocalcemia is not directly associated with digoxin toxicity. Monitoring sodium levels (Choice C) is important for other conditions but is not the primary concern in a patient taking digoxin. Monitoring magnesium levels (Choice D) is also essential, but hypomagnesemia is not as directly linked to digoxin toxicity as hypokalemia.

Correct Answer: B

Rationale: The correct instruction for a client taking digoxin is to notify their provider if they experience visual disturbances. Visual disturbances can be a sign of digoxin toxicity, and prompt notification to the healthcare provider is essential for timely intervention. Choice A is incorrect because digoxin should be taken on an empty stomach for better absorption. Choice C is incorrect because antacids can interfere with the absorption of digoxin. Choice D is incorrect because a heart rate less than 60/min is not a sole reason to avoid taking digoxin; rather, it is important to monitor the heart rate and consult with the healthcare provider if there are concerns.

Correct Answer: A

Rationale: The nurse should document the time the medication was given in the client's medical record when administering an incorrect dose. This information is crucial for tracking the sequence of events leading to the error. Choice B, the client's response to the medication, is important for monitoring the client's condition post-administration but may not be directly linked to the incident report. Choice C, documenting the dose that was administered, is relevant but does not provide insights into the timing of events. Choice D, detailing the reason for the error, should be included in the incident report but may not need to be documented in the client's medical record.

Correct Answer: A

Rationale: Corrected Rationale: Daily weight monitoring is the most accurate way to assess fluid balance in patients receiving diuretics. Monitoring daily weight allows healthcare providers to track changes in fluid status more precisely. While monitoring intake and output (choice B) is essential, it may not provide a comprehensive picture of overall fluid balance. Monitoring blood pressure (choice C) is important but may not directly reflect fluid balance. Checking for edema (choice D) is useful but may not be as sensitive as daily weight monitoring in assessing fluid balance.

Correct Answer: C

Rationale: The correct answer is C because a urine output of 30 mL/hr indicates oliguria, which can be a sign of dehydration or kidney impairment postoperatively. This finding should be reported to the provider for further evaluation. Choices A, B, and D are within normal parameters for a client who is 2 days postoperative following abdominal surgery and do not raise immediate concerns. Serosanguineous drainage on the dressing is an expected finding in the early postoperative period, a heart rate of 88/min is within the normal range, and a blood pressure of 110/70 mm Hg is also within normal limits.