A client receiving a unit of packed RBCs reports low-back pain and appears flushed. What should the nurse's priority action be?

The priority action in this scenario is to stop the transfusion. When a client reports symptoms such as low-back pain and flushing during a blood transfusion, these may be indicative of a transfusion reaction, which can range from mild to severe, including life-threatening reactions like hemolytic reactions. Stopping the transfusion immediately is crucial to prevent further exposure to potential blood components that could be causing the adverse reaction.

By halting the transfusion, the nurse allows for the assessment and management of the client's condition. After stopping the transfusion, it's important to initiate supportive measures such as keeping the IV line open with saline, monitoring vital signs closely, and preparing for further assessment or intervention as needed.

While notifying the provider and assessing the client's skin for a rash are important subsequent actions, the immediate response to stop the transfusion takes precedence in safeguarding the client's health and preventing complications. Covering the client with a blanket does not address the underlying issue of a possible transfusion reaction. Therefore, stopping the transfusion is the most critical and immediate action the nurse should take in this scenario.