What needs to be clicked to release a unit of blood?

To release a unit of blood, the correct action is to click on the transfuse order, followed by the release link. This process is crucial because it ensures that the blood unit is officially documented as being released for the intended patient. The transfuse order is specifically designed for blood products, and by accessing it, the healthcare provider verifies that all necessary parameters and patient compatibility checks are completed. After this verification, clicking the release link finalizes the process and allows for the safe administration of the blood unit to the patient.

The other choices do not accurately represent the necessary steps for releasing blood. Simply clicking on the order details or the patient's chart does not facilitate the release process, as these steps do not provide the comprehensive check and balance required specifically for transfusion protocols. The inventory system, while relevant for tracking blood supply, is not the point of action for releasing a blood unit that is to be administered to a patient.