In a non-urgent red cell transfusion, when can reactions to blood transfusion potentially be detected?

In the context of blood transfusions, particularly for non-urgent red cell transfusions, reactions to blood transfusions can potentially be detected within the initial 15 minutes of starting the transfusion. This critical time frame is when the patient is most closely monitored for any signs of an adverse reaction.

During the initial 15 minutes, the body may respond to the infused red blood cells, and symptoms of a reaction, such as fever, chills, or changes in vital signs, can manifest. Health care providers are trained to observe patients closely during this period, as prompt recognition and response to any adverse effects can significantly impact patient safety and the management of the reaction.

The other options suggest monitoring periods that either extend beyond this critical timeframe or do not account for the early signs of a reaction. Therefore, recognizing that the initial 15 minutes is essential for identifying potential transfusion reactions underscores the importance of vigilant observation during this period.