Correct Answer: B

Rationale: The correct answer is to place the patient in a high Fowler's position. This position helps improve lung expansion and oxygenation in cases of pulmonary edema by reducing venous return to the heart and enhancing respiratory mechanics. Administering a diuretic (Choice A) can be important but is not the priority over positioning in this situation. Administering oxygen (Choice C) is essential, but the priority action for improving oxygenation is the positioning of the patient. Monitoring lung sounds (Choice D) is crucial for ongoing assessment but is not the priority action when the patient is in distress with pulmonary edema.

Correct Answer: C

Rationale: Choice C is the correct answer. When performing a sterile dressing change, it is essential to use clean gloves to remove soiled dressings and sterile gloves and supplies for applying the new dressing. This helps maintain aseptic technique and reduce the risk of introducing pathogens to the wound. Choices A, B, and D involve incorrect use of sterile and clean supplies, which can compromise the sterility of the procedure and increase the risk of infection.

Correct Answer: B

Rationale: The most appropriate response for the nurse when a client asks about a medication is to refer the client to the healthcare provider for more information. This ensures that the client receives accurate and detailed information from the appropriate source. Providing detailed information or a brief explanation as choices A and C suggest may not be within the nurse's scope of practice and could potentially lead to misinformation or confusion. Asking another nurse to explain the medication, as in choice D, may not guarantee accurate information, so it is best to involve the healthcare provider directly.

Correct Answer: B

Rationale: The most important action to ensure patient safety when administering a blood transfusion is to verify the patient's identity with two identifiers before starting the transfusion. This step is crucial to prevent transfusion errors, such as giving the blood to the wrong patient. Checking vital signs, ensuring timely administration, and confirming informed consent are also important aspects of blood transfusion safety but verifying the patient's identity is the highest priority to prevent errors.

Correct Answer: D

Rationale: The correct answer is to respect the patient's right to refuse the medication. It is crucial to uphold the patient's autonomy and decision-making capacity when it comes to their treatment. Administering the medication later without the patient's consent (Choice B) disregards their autonomy and can lead to ethical issues. Documenting the refusal and notifying the healthcare provider (Choice A) is important for legal and continuity of care purposes but should come after respecting the patient's decision. While explaining the importance of the medication (Choice C) is valuable for promoting understanding and compliance, the immediate concern should be respecting the patient's refusal.