Correct Answer: B

Rationale: One of the key advantages associated with a nursing clinical information system is the reduction of errors of omission. By using an electronic system that prompts for required data entry and ensures completeness of documentation, nurses are less likely to miss important information, leading to improved patient care and safety. This advantage helps in promoting efficient communication among healthcare providers and contributes to better decision-making processes.

Correct Answer: B

Rationale: Superior vena cava syndrome (SVCS) is a medical emergency that can occur in patients with advanced cancer, such as breast cancer with metastasis. SVCS is caused by the obstruction or compression of the superior vena cava, a large vein that carries blood from the upper body back to the heart. When the superior vena cava is obstructed or compressed, it can lead to symptoms such as difficulty breathing (dyspnea) and distended jugular veins.

Correct Answer: C

Rationale: The nurse's best response is option C - "AIDS isn't transmitted by casual contact." This response is accurate and provides the necessary information to address the friend's concern. It is important to educate the friend that HIV/AIDS is not transmitted through casual contact such as visiting a patient in the hospital. By stating this fact clearly, the nurse can help alleviate any unfounded fears or misconceptions the friend may have about contracting HIV while visiting the patient. This response promotes understanding and helps reduce stigma associated with HIV/AIDS, while also emphasizing the importance of accurate information in preventing the spread of the virus.

Correct Answer: A

Rationale: In the assessment of a patient with potential placenta previa or abruptio placentae, the nurse should pay close attention to the amount and characteristics of vaginal bleeding. Placenta previa typically presents with painless vaginal bleeding, which can be sudden and significant. Therefore, a saturated perineal pad within a short period of time (1 hour) is more indicative of placenta previa, as opposed to abruptio placentae which usually presents with painful vaginal bleeding and may not necessarily saturate a perineal pad quickly. Monitoring the amount of bleeding and keeping track of pad saturation over time can provide valuable information to differentiate between these two conditions.

Correct Answer: B

Rationale: After a mastoidectomy, the ear should be protected from water for several weeks. This is because exposing the area to water can increase the risk of infection. Keeping the ear dry allows the surgical site to heal properly and reduces the likelihood of postoperative complications such as infection. Therefore, instructing the patient to protect the ear from water is an important intervention to prevent postoperative infection following a mastoidectomy.