How is donated blood collected for a transfusion?

Donated blood is collected through a sterile needle into specialized collection bags that contain anticoagulants to prevent the blood from clotting. A standard donation of whole blood typically consists of approximately 450 ml.12

Alternatively, blood centers may use a technique called apheresis, which allows for the collection of specific components—such as platelets or plasma—while immediately returning the remaining fluid and cells to the donor.2

Following collection, the blood undergoes rigorous safety procedures:
* Testing and Screening: The blood is tested for blood type and screened for infectious agents, including HIV and hepatitis viruses, using advanced molecular techniques like polymerase chain reaction (PCR) to detect viral genetic material.31
* Processing: Most donations are separated into specific components, such as red blood cells, to serve the distinct medical needs of multiple patients.21
* Storage: Blood products are kept under controlled conditions until they are required for a transfusion.1