Correct Answer: C

Rationale: The correct answer is C: bacterial endocarditis. Mitral valve stenosis increases the risk of bacterial endocarditis due to turbulent blood flow and potential damage to the heart valve. Prophylactic antibiotics are recommended before certain procedures to prevent bacterial endocarditis in patients with underlying cardiac conditions. Choice A, hypertension, is incorrect as mitral valve stenosis does not directly increase the risk of developing hypertension. Choice B, postpartum infection, is not directly related to the risk associated with mitral valve stenosis. Choice D, upper respiratory infections, is not a specific risk associated with mitral valve stenosis in pregnant patients.

Correct Answer: C

Rationale: Rationale for Correct Answer (C): The nurse can presume the patient has candidiasis since miconazole is commonly used to treat fungal infections like vaginal yeast infections caused by Candida. This medication works by stopping the growth of the fungus. Therefore, the patient's use of miconazole indicates a probable diagnosis of candidiasis. Summary of Incorrect Choices: A (Bacterial vaginosis): Miconazole is not used to treat bacterial infections like bacterial vaginosis, which is caused by an imbalance of bacteria in the vagina. B (HPV): Miconazole is not used to treat viral infections like HPV, which is a sexually transmitted infection caused by certain types of human papillomavirus. D (TSS): Miconazole is not used to treat toxic shock syndrome, which is a severe complication of certain bacterial infections and is not typically associated with miconazole use.

Correct Answer: B

Rationale: The correct answer is B: Stapes. Otosclerosis is a condition characterized by abnormal bone growth in the middle ear, causing the stapes bone to become fixed in place. This results in hearing loss due to the inability of the stapes to transmit sound vibrations to the inner ear. The malleus (choice A), incus (choice C), and tympanic membrane (choice D) are not primarily affected by otosclerosis. The malleus and incus are located in the middle ear but are not typically affected by otosclerosis. The tympanic membrane is part of the outer ear and is not directly involved in otosclerosis.

Correct Answer: D

Rationale: The correct answer is D: Sentinel node biopsy. This procedure involves identifying and removing the sentinel lymph node(s) which is the first lymph node(s) that cancer cells are likely to spread to from the primary tumor. This method helps determine if cancer has spread beyond the primary site without the need for a full axillary lymph node dissection. It is less invasive, has fewer side effects, and provides accurate staging information. Lymphadenectomy (A) refers to the removal of multiple lymph nodes, which is more extensive than necessary in this case. Needle biopsy (B) and open biopsy (C) are not specific to lymph node evaluation and do not provide accurate staging information for breast cancer.

Correct Answer: C

Rationale: The correct answer is C: Place the patient on respiratory isolation and inform the physician. This is the most appropriate action because the patient is exhibiting symptoms that could be indicative of a potentially infectious respiratory condition, such as tuberculosis or pneumonia. Placing the patient on respiratory isolation helps prevent the spread of infection to others and protects healthcare workers. Informing the physician promptly allows for further evaluation and appropriate treatment. Choice A is incorrect as Kaposi's sarcoma typically presents with skin lesions rather than respiratory symptoms. Choice B is incorrect as reviewing viral load and CD4+ count would not address the immediate concern of respiratory symptoms. Choice D is incorrect as oral suctioning is not the appropriate intervention for night sweats and coughing up blood.