Correct Answer: A

Rationale: The correct answer is A: Hypokalemia. Furosemide, a loop diuretic, commonly causes the loss of potassium in the urine, leading to hypokalemia. This electrolyte imbalance can result in various complications such as cardiac arrhythmias and muscle weakness. Choice B, Hyponatremia, is not typically associated with furosemide use. Choice C, Hyperkalemia, is the opposite of the expected electrolyte imbalance caused by furosemide. Choice D, Hypercalcemia, is not a common side effect of furosemide.

Correct Answer: A

Rationale: The correct answer is A: Administer anticoagulants. Administering anticoagulants is crucial in managing patients with suspected DVT as it helps prevent further clot formation and reduces the risk of complications like pulmonary embolism. Choice B, applying compression stockings, is more focused on preventing DVT in high-risk patients rather than managing an established case. Encouraging ambulation, choice C, is beneficial in the prevention of DVT but is not the primary management for suspected cases. Monitoring oxygen saturation, choice D, is important in overall patient care but is not the primary intervention for suspected DVT.

Correct Answer: A

Rationale: The correct action to prevent aspiration in a client with a nasogastric tube is to elevate the head of the bed to 45 degrees during feedings. This positioning helps reduce the risk of regurgitation and aspiration of gastric contents. Placing the client in the left lateral position after feedings does not directly prevent aspiration. Flushing the tube with sterile water before each feeding is important for tube patency but does not specifically prevent aspiration. Checking gastric residuals every 8 hours is necessary to monitor the client's tolerance to feedings but is not a direct preventive measure against aspiration.

Correct Answer: C

Rationale: The correct answer is C because clients taking metformin should avoid alcohol as it increases the risk of lactic acidosis. Choices A, B, and D are incorrect. Choice A is not specific to metformin but rather a general recommendation for some medications. Choice B is a good practice for medication adherence but does not relate specifically to metformin. Choice D is inaccurate as weight gain is not an expected side effect of metformin.

Correct Answer: D

Rationale: Instructing the patient to use the spirometer every hour is crucial for optimal lung expansion and to prevent postoperative pulmonary complications. This regular use helps to keep the lungs clear and maintain their capacity. Choices A, B, and C are incorrect because deep breathing, forceful coughing, and blowing into the spirometer do not specifically address the proper use of the incentive spirometer, which is essential for postoperative respiratory recovery.