Correct Answer: A

Rationale: The correct first action for the nurse is to stop the transfusion and notify the healthcare provider. These symptoms suggest a transfusion reaction, and stopping the transfusion is crucial to prevent further complications. Notifying the healthcare provider ensures timely intervention and appropriate management for the client's condition. Monitoring vital signs, administering diphenhydramine, or preparing to administer an antihistamine can be considered after stopping the transfusion and seeking guidance from the healthcare provider. However, the immediate priority is to halt the transfusion and inform the provider.

Correct Answer: D

Rationale: The correct answer is D: 'Use sunscreen to prevent photosensitivity.' Methotrexate increases photosensitivity, so clients should be advised to use sunscreen to protect their skin from sun exposure. Choice A is incorrect because methotrexate is usually taken with food to reduce gastrointestinal side effects. Choice B may be important but is not specific to methotrexate therapy. Choice C is also important, but the primary reason for folic acid supplementation with methotrexate is to reduce the risk of certain side effects like anemia rather than preventing anemia itself.

Correct Answer: A

Rationale: The correct answer is to evaluate the client's swallowing ability. Osmotic demyelination can cause dysphagia, putting the client at risk for aspiration. Assessing swallowing function is crucial to prevent complications such as aspiration pneumonia. Reorienting the client frequently (Choice B) is more suitable for confusion related to conditions like delirium. Patching one eye (Choice C) is a technique used for diplopia or double vision, not specifically indicated for osmotic demyelination. Performing range of motion exercises (Choice D) may be beneficial for preventing complications of immobility but is not the priority intervention for osmotic demyelination.

Correct Answer: C

Rationale: A change in responsiveness, as indicated by being minimally responsive to voice and touch, suggests a potential acute issue that requires immediate nursing assessment and intervention rather than delegation. Changes in vital signs (choices A, B, D) can be important but do not always indicate an immediate need for nursing intervention compared to a change in responsiveness.

Correct Answer: B

Rationale: Wheezing and stridor may indicate a severe allergic reaction to calcium gluconate, such as anaphylaxis, which requires immediate intervention. While hypocalcemia can present with decreased deep tendon reflexes and positive Chvostek's sign, these findings do not indicate an immediate life-threatening situation. Decreased bowel sounds are not directly related to a severe reaction to calcium gluconate and do not require immediate intervention.