A nurse is assessing a client who has a brain tumor and is receiving palliative care. Which of the following findings indicates the nurse should administer pain medication?

Choice A reason: Applying nitroglycerin ointment in a thin, even layer ensures consistent absorption for angina relief, as specified by dosing guidelines (e.g., using a dosing paper). This maximizes efficacy and minimizes side effects like hypotension, aligning with manufacturer instructions, making it the correct teaching point.
Choice B reason: Applying to the forearm is not standard, as nitroglycerin ointment is typically applied to the chest, upper arm, or back for optimal absorption. Forearm application may reduce effectiveness due to skin thickness, making this an incorrect site choice.
Choice C reason: Applying every 4 hours is incorrect, as nitroglycerin ointment is typically applied 2-3 times daily, with a 12-hour nitrate-free interval to prevent tolerance. This frequency is too frequent and risks side effects, making it an inaccurate instruction.
Choice D reason: Massaging nitroglycerin ointment into the skin is contraindicated, as it alters absorption rates and may cause inconsistent dosing or irritation. The ointment is spread lightly and covered, making this instruction incorrect and potentially harmful for proper administration.

Choice A reason: Catheter placement for a nontunneled central venous access device is typically confirmed by X-ray, not a CT scan, to verify tip placement in the superior vena cava. CT scans are less common due to higher radiation and cost, making this statement inaccurate for standard practice.
Choice B reason: Elevating the head as high as possible during insertion is incorrect, as the Trendelenburg position (head down) is often used to distend veins and reduce air embolism risk. High head elevation could complicate insertion and increase complications, making this instruction inappropriate.
Choice C reason: Flushing the catheter with saline daily maintains patency, preventing clots and ensuring functionality of the nontunneled central venous access device. This is a standard care instruction, reducing infection and occlusion risks, and aligns with evidence-based protocols for central line maintenance, making it correct.
Choice D reason: Lying flat for 24 hours post-procedure is not required for nontunneled central venous catheters. Patients may need brief bed rest (e.g., 30 minutes) to prevent bleeding, but 24 hours is excessive and not evidence-based, making this instruction incorrect and overly restrictive.