Final answer:
The nurse should anticipate slowing the infusion rate when a patient develops restlessness, dyspnea, and crackles during a blood transfusion to minimize the severity of a possible transfusion reaction.
Step-by-step explanation:
The nurse should anticipate taking action to slow the infusion rate when caring for a patient who becomes restless, dyspneic, and has crackles noted to the lung bases during a blood transfusion. These symptoms are suggestive of a possible transfusion reaction, which can occur when the patient's body reacts negatively to the transfused blood. Slowing the infusion rate can help to minimize the severity of the reaction and allow for further assessment and intervention if needed.