Correct Answer: C

Rationale: When an ELISA test for HIV is positive, it is essential to confirm the result with a Western blot. The Western blot is the confirmatory test for HIV. Choice A is incorrect because a positive ELISA test does not confirm HIV infection. Choice B is incorrect as it assumes a different diagnosis. Choice D is incorrect because a positive ELISA test does indicate potential HIV infection and requires confirmation.

Correct Answer: A

Rationale: When using a Wood light to examine the skin, the nurse should darken the examining room. This is necessary because the Wood light emits long-wavelength UV light, which is better visualized in a darkened environment. Administering a local anesthetic (Choice B) is not needed for this procedure. Obtaining a signed informed consent (Choice C) is not directly related to using a Wood light for skin examination. Shaving the skin and scrubbing it with povidone-iodine (Betadine) (Choice D) is not required and may not be appropriate for this type of skin examination.

Correct Answer: D

Rationale: Pallor and coolness of the right leg indicate a potential vascular complication following renal angiography, such as hemorrhage, thrombosis, or embolism. These signs suggest impaired circulation in the affected limb. Urine output, blood pressure, and respiratory rate are not typically associated with complications of renal angiography. Complications of this procedure mainly involve allergic reactions to the dye, dye-induced renal damage, and various vascular issues.

Correct Answer: A

Rationale: High doses of tetracyclines can lead to nephrotoxicity, especially when given along with other nephrotoxic drugs. Renal function tests, such as monitoring blood urea nitrogen (BUN) and creatinine levels, should be performed to assess for nephrotoxicity. Monitoring complete blood counts (choice B) is not directly related to tetracycline therapy. Checking electrolytes (choice C) is important but not the priority when monitoring for tetracycline-induced nephrotoxicity. Monitoring liver enzyme levels (choice D) is not typically indicated in the context of tetracycline therapy.

Correct Answer: A

Rationale: The correct question to ask the client first is about their recent intake of nephrotoxic medications like aspirin, ibuprofen, or naproxen. Elevated serum creatinine and BUN levels indicate possible renal issues, making it crucial to assess potential causes such as medication-induced nephrotoxicity. Inquiring about family history of renal failure or recent kidney transplants would not provide immediate insights into the client's current renal condition. While a diet low in protein could influence BUN levels, it is important to address medication history first due to the acute presentation in the emergency department.