Correct Answer: D

Rationale: The correct answer is to monitor the client's oxygen saturation level. Deep-vein thrombosis (DVT) increases the risk of pulmonary embolism, a life-threatening complication. Monitoring oxygen saturation helps in early detection of any signs of compromised respiratory function. Massaging the affected leg can dislodge a blood clot, leading to severe consequences. Applying heat through a heating pad can promote vasodilation and increase the risk of clot dislodgment. While mobility is essential in preventing DVT complications, encouraging excessive walking without proper assessment can potentially dislodge a clot and worsen the condition.

Correct Answer: D

Rationale: A serum creatinine level of 3.0 mg/dL indicates impaired kidney function, which is a concern when prescribing spironolactone as it can further affect renal function. Elevated serum creatinine levels may suggest decreased renal clearance of spironolactone, leading to potential toxicity. Potassium, calcium, and magnesium levels are within normal ranges and not directly related to spironolactone therapy. Therefore, the nurse should report the elevated serum creatinine level to the provider for further evaluation and possible dosage adjustment.

Correct Answer: D

Rationale: Placing a pillow under the client's lower legs is the correct intervention because it helps prevent pressure on the incision site and promotes circulation. Elevating the lower legs also aids in reducing swelling and improving blood flow. Applying heat to the incision site (Choice A) is contraindicated in the early postoperative period as it can increase inflammation and the risk of infection. Keeping the client's knee flexed while in bed (Choice B) may lead to contractures or limited extension of the knee joint. Placing a pillow under the client's knee (Choice C) may cause hyperextension of the knee, which is also not recommended post knee arthroplasty.

Correct Answer: C

Rationale: Hypotension is a common adverse effect of morphine due to its vasodilatory properties. It can lead to a drop in blood pressure, which should be closely monitored during administration. Diarrhea (Choice A) is not a typical adverse effect of morphine. Urinary retention (Choice B) is a side effect of morphine due to its impact on the bladder muscles, but it is not classified as an adverse effect. Bradycardia (Choice D) is not a common adverse effect of morphine; instead, it tends to cause tachycardia.

Correct Answer: B

Rationale: Swelling of the arm above the insertion site is concerning as it can indicate complications like thrombosis, which require immediate attention. Redness at the insertion site is common and expected in the initial stages. A bruised area around the insertion site may result from the insertion procedure and is usually not alarming unless it worsens or becomes larger. A temperature of 37.2°C (99°F) is within the normal range and is not directly related to PICC complications.