Correct Answer: B

Rationale: The correct answer is B: The catheter should remain in place for 1-2 days. After litholapaxy surgery, the urethral catheter is typically removed within 1-2 days to prevent infection and promote healing. Keeping the catheter in place for too long can increase the risk of complications such as urinary tract infections. Options A, C, and D suggest longer durations which are not necessary and may lead to unnecessary discomfort and risks for the client. Therefore, the optimal timeframe for catheter removal post-litholapaxy surgery is within 1-2 days.

Correct Answer: C

Rationale: The correct answer is C because flushing the central venous catheter with a heparinized solution before blood withdrawal is essential to maintain catheter patency and prevent clot formation. This step ensures the catheter is clear of any blockages, allowing for accurate blood sampling. Choice A is incorrect because assembling supplies should come after preparing the catheter. Choice B is incorrect as discarding blood before flushing the catheter may lead to inaccurate test results. Choice D is incorrect as replacing the catheter cap without flushing may lead to clot formation and catheter malfunction.

Correct Answer: C

Rationale: The correct answer is C. When the client is in a state of respiratory arrest, immediate medical intervention is required. Discontinuing oxygen administration and notifying the physician is crucial to address the life-threatening situation. A: Improving color is a positive sign. B: Decreased consciousness may indicate a need for further assessment but does not require immediate discontinuation of oxygen. D: Inability to use the diaphragm may require intervention but does not indicate an immediate threat as respiratory arrest does.

Correct Answer: A

Rationale: The correct answer is A: Facial tenderness. Sinus infections commonly present with facial tenderness due to the inflammation and pressure within the sinuses. This symptom is often accompanied by pain or pressure around the eyes, cheeks, and forehead. Photophobia (B) is more commonly associated with conditions like migraines or meningitis. Chest pain (C) is not a typical symptom of a sinus infection. Ear drainage (D) is more indicative of an ear infection rather than a sinus infection.

Correct Answer: B

Rationale: The correct answer is B: Encourage ambulation and liberal fluid. Encouraging ambulation can help in the movement of kidney stones and alleviate pain. Liberal fluid intake helps in flushing out kidney stones and preventing further stone formation. Incorrect options: A: Administering prescribed nephrotoxic drugs can worsen kidney function and exacerbate the pain. C: Observing aseptic principles when changing intake is important for infection prevention but not directly related to pain management for renal calculi. D: Providing a comfortable position can offer temporary relief but does not address the underlying cause of kidney stone pain.