Correct Answer: B

Rationale: In this situation, the client's symptoms of congestion and feeling uneasy may indicate an anaphylactic reaction, which can be life-threatening. The most appropriate action is to call the Rapid Response Team to provide immediate assistance and interventions. Elevating the head of the bed, administering diphenhydramine, or slowing the IV infusion rate are not the priority actions in the case of a potential severe allergic reaction. These interventions may delay necessary emergency care and potentially worsen the client's condition.

Correct Answer: C

Rationale: Ensuring the safety of a blood transfusion is crucial to prevent potential errors or adverse reactions. Checking the blood identification numbers with the laboratory technician at the Blood Bank when the blood is dispersed helps confirm that the correct blood product is being administered to the right patient, reducing the risk of transfusion reactions. The other choices are incorrect because asking the client to say and spell their full name (Choice A) is a part of the identification process but not specific to ensuring the safety of the blood transfusion. While having another qualified healthcare professional check the unit (Choice B) is a good practice, the direct verification with the Blood Bank technician is a more critical step in ensuring the correct blood product is administered. Choice D is irrelevant to ensuring the safety of the blood transfusion as it addresses infection control measures.

Correct Answer: D

Rationale: In this scenario, the client is showing signs of a potential transfusion reaction, indicated by an increased respiratory rate. The nurse's initial action should be to slow down the infusion rate of the packed red blood cells to prevent further complications. Administering diphenhydramine or stopping the infusion should not be the first actions taken, as the priority is to ensure the client's safety and prevent adverse reactions. Continuing to monitor vital signs without taking immediate action to address the increased respiratory rate would delay appropriate intervention.

Correct Answer: D

Rationale: The correct answer is 'My rings seem to be tighter this week.' This assessment finding indicates possible fluid retention, which can be a sign of fluid or electrolyte imbalance in an older adult. Choices A, B, and C do not specifically point towards fluid or electrolyte imbalance. Feeling cold, increased urination with coffee consumption, and feeling thirsty in the summer are not direct indicators of fluid or electrolyte imbalance in this context.

Correct Answer: B

Rationale: The correct answer is, '"The spirometer will help your lungs expand."?' Incentive spirometry is used postoperatively to help prevent atelectasis by expanding the lungs and improving lung function. Choice A is incorrect because the primary purpose of the spirometer is not to help cough effectively. Choice C is incorrect because while deep breathing with the spirometer can indirectly help prevent blood clots by improving lung function, its primary purpose is not to prevent blood clots directly. Choice D is incorrect because although using the spirometer can improve ventilation and oxygenation, its main purpose is not to improve blood flow in the lungs.