MODEL RELEASED. Registering blood bags. Laboratory technician using a barcode scanner to register the arrival of bags of donor blood. This is to ensure accurate records and enable the blood to be traced throughout the donation process. This is whole blood, as it has not yet been separated into its components. The blood will be tested for its blood group and other properties. Its components will then be used in blood transfusions to treat various blood disorders or replace blood lost through surgery or an accident.