What is the primary nursing action when a transfusion reaction is suspected?

The primary nursing action when a transfusion reaction is suspected is to stop the blood transfusion immediately. This is crucial because continuing the transfusion could worsen the patient's condition and lead to serious complications. Stopping the transfusion halts the introduction of the incompatible blood product, thereby reducing the risk of further harm.

Once the transfusion is stopped, the nurse can then proceed with other necessary actions, such as notifying the physician and starting an IV line with normal saline to maintain venous access and help flush the blood from the system. Documenting the reaction is also essential but comes after the immediate response to ensure patient safety. Therefore, stopping the transfusion is the most critical first step in managing a suspected transfusion reaction.