Correct Answer: D

Rationale: The correct answer is D: Bacteria. In a patient with a urinary tract infection (UTI), bacteria are typically present in the urine due to the infection of the urinary system. Bacteria may be detected through urine culture or microscopic examination. A: Casts are not typically associated with UTIs but can indicate kidney disease. B: Protein in the urine can indicate kidney damage or other issues, not specific to UTIs. C: Crystals in the urine can be normal or indicate specific conditions, but they are not specific to UTIs. In summary, the presence of bacteria in the urine is a key indicator of a UTI, while the other choices are more indicative of different conditions or factors.

Correct Answer: A

Rationale: The correct answer is A: Utilize a pressure-reducing mattress. This intervention is crucial for preventing pressure ulcers in patients at risk for impaired skin integrity, such as those with HIV. By redistributing pressure, a pressure-reducing mattress helps to alleviate pressure on vulnerable areas, reducing the risk of skin breakdown. Limiting physical activity (B) can lead to muscle atrophy and worsen skin integrity. Applying antibiotic ointment (C) may not address the root cause of skin breakdown. Avoiding synthetic fabrics (D) may be helpful in some cases, but it is not as effective as using a pressure-reducing mattress.

Correct Answer: D

Rationale: The correct answer is D: Bilateral mastectomy. This intervention involves removing both breasts to reduce the risk of developing breast cancer in the future. For a woman with a history of breast cancer in one breast, opting for bilateral mastectomy can significantly decrease the likelihood of cancer recurrence. This proactive approach is often recommended for individuals with a high risk of developing breast cancer. Explanation for why the other choices are incorrect: A: More aggressive chemotherapy - Chemotherapy is typically used to treat existing cancer cells, not as a prophylactic measure to prevent cancer. B: Left mastectomy - This option only removes the affected breast, not addressing the risk of cancer developing in the other breast. C: Radiation therapy - While radiation therapy can be used as part of the treatment for breast cancer, it is not a prophylactic measure to prevent future cancer development in the contralateral breast.

Correct Answer: B

Rationale: The correct answer is B because the nurse should prioritize the patient who has been receiving total parenteral nutrition (TPN) infusing with the same tubing for 26 hours. This patient needs to be seen first to monitor for any potential complications or issues related to TPN administration. Choice A can be ruled out because 50 hours is longer than 26 hours. Choices C and D involve enteral feeding, which is important but generally less critical than TPN. Additionally, choice D has a shorter duration than choice B. Therefore, choice B is the most time-sensitive and critical patient to assess first.

Correct Answer: A

Rationale: The correct answer is A: Diabetes. Erectile dysfunction can be caused by organic factors, such as diabetes, which affects blood flow and nerve function. Diabetes can lead to damage of blood vessels and nerves, impacting the ability to achieve and maintain an erection. Testosterone deficiency (choice B) can also contribute to erectile dysfunction, but it is not an organic cause. Anxiety (choice C) and depression (choice D) are psychological factors that can lead to erectile dysfunction, not organic causes. Parkinsonism (choice E) can affect sexual function, but it is not a common organic cause of erectile dysfunction.