Correct Answer: B

Rationale: The correct answer is B: The patient is likely to experience resolution of conductive hearing loss after the procedure. This information is crucial to include in the preoperative teaching because it directly addresses the patient's expected outcome, providing reassurance and setting appropriate expectations. Stapedectomy with prosthesis insertion is a well-established treatment for otosclerosis-related conductive hearing loss. Choices A, C, and D are incorrect because they either provide misleading information (A, D) or are not directly relevant to the procedure or the patient's immediate postoperative experience (C). It is important to focus on accurate and relevant information to prepare the patient effectively for the upcoming surgery and its expected outcomes.

Correct Answer: C

Rationale: The correct answer is C: Prophylactic surgery. Prophylactic surgery involves removing tissue at risk of developing cancer to prevent the occurrence of cancer. In this case, the patient has a family history of breast cancer and has tested positive for a breast tumor marker, indicating a high risk of developing breast cancer. By opting for a bilateral mastectomy, the patient is proactively removing breast tissue to reduce her risk of developing breast cancer. Salvage surgery (A) is performed to remove cancer that has recurred after initial treatment. Palliative surgery (B) aims to alleviate symptoms and improve quality of life but is not curative. Reconstructive surgery (D) is performed to restore the appearance and function of a body part after cancer treatment but is not the primary purpose in this scenario.

Correct Answer: C

Rationale: Step 1: The nurse should inform the patient that most cases of ovarian cancer are considered to be random, with no obvious causation. This is the correct answer because the exact cause of ovarian cancer is not well understood, and the majority of cases are not linked to specific risk factors. Step 2: Choice A is incorrect because the use of oral contraceptives actually decreases the risk of ovarian cancer. Step 3: Choice B is incorrect because tobacco use is not a major risk factor for ovarian cancer. It is primarily associated with lung and other types of cancer. Step 4: Choice D is incorrect because while a family history of ovarian cancer can increase the risk, the majority of women diagnosed with ovarian cancer do not have a family history of the disease.

Correct Answer: C

Rationale: The correct answer is C because an older patient with glaucoma is at risk for increased intraocular pressure when receiving an enema. This situation requires immediate attention to prevent potential complications like vision loss. The other choices do not pose immediate risks that require urgent intervention. A and B can wait for a brief period, while D is not time-sensitive in the context of a myocardial infarction. The priority is always given to the patient with the highest risk of harm if the intervention is delayed.

Correct Answer: B

Rationale: The correct answer is B (200 cells/mm3 of blood) because a patient with HIV is considered to have AIDS when their CD4+ T-lymphocyte cell count drops below 200 cells/mm3. This threshold signifies a significant decrease in the immune system's ability to fight off infections and indicates progression to AIDS. Choice A (75 cells/mm3 of blood) is incorrect because this level is extremely low and would indicate severe immunosuppression, likely leading to AIDS much earlier than anticipated. Choice C (325 cells/mm3 of blood) and D (450 cells/mm3 of blood) are also incorrect as these levels are within the normal range or slightly lower, which would not meet the criteria for a diagnosis of AIDS.