Correct Answer: B

Rationale: The correct answer is B: Nausea and vomiting. Chemotherapeutic drugs commonly cause nausea and vomiting due to their effect on the gastrointestinal system. This is because these drugs can irritate the stomach lining and trigger the vomiting center in the brain. Nausea and vomiting are well-documented side effects of chemotherapy and are often managed with antiemetic medications. A: Painful mouth sores are a common side effect of some chemotherapeutic drugs, but they are not the most common adverse effect. C: Frequent diarrhea can occur as a side effect of chemotherapy, but it is less common than nausea and vomiting. D: Constipation is not a common adverse effect of chemotherapeutic drugs; in fact, diarrhea is more commonly seen.

Correct Answer: C

Rationale: The correct initial action for the nurse is to choose option C: Notify the physician. Increasing oxygen without a healthcare provider's order can be harmful, especially in COPD patients prone to retaining carbon dioxide. The nurse should communicate the situation to the physician to assess the client's condition and adjust the oxygen therapy appropriately. Option A is incorrect as it neglects the potential risks of high oxygen levels. Option B is incorrect as immediate decrease without proper assessment can be dangerous. Option D is not the priority when the client's oxygen therapy needs evaluation.

Correct Answer: A

Rationale: The correct answer is A: Reassure the patient. The first priority in any accident scenario is to ensure the patient's safety and well-being. By checking if the patient is conscious, the nurse can assess their immediate condition and provide reassurance to alleviate any distress or anxiety. This step establishes communication and trust, allowing for further assessment and appropriate actions to be taken. Calling relatives (B) may be important but not the immediate first step. Bringing the patient immediately to the hospital (C) is premature without assessing the patient first. Calling a doctor (D) can be done after assessing the patient's condition.

Correct Answer: B

Rationale: The correct answer is B: Keep extremities at neutral position. This intervention promotes proper blood flow and reduces the risk of thrombophlebitis by preventing compression or restriction of blood vessels. Removing and reapplying elastic stockings (choice A) can disrupt circulation and increase the risk of thrombophlebitis. Changing the client's position (choice C) may not directly address hemostasis or thrombophlebitis. Using a flotation mattress (choice D) is not specifically focused on maintaining proper positioning of the extremities to promote circulation.

Correct Answer: A

Rationale: The correct answer is A: Vision changes. Tamoxifen can cause serious ocular side effects like retinopathy and corneal changes. These adverse reactions can lead to vision impairment or loss, which is crucial to report immediately to prevent permanent damage. Headache (B), hearing loss (C), and anorexia (D) are not typically associated with tamoxifen use and do not pose immediate threats to the client's health compared to vision changes. It is important for the nurse to prioritize educating the client on recognizing and reporting vision changes promptly to ensure timely intervention and prevent irreversible consequences.