How is blood delivered into a recipient’s vein during a transfusion?

During a blood transfusion, compatible blood products are delivered into a recipient’s vein through sterile tubing. The flow of the blood is managed either by gravity or through the use of infusion devices that regulate the rate of delivery. This process is performed slowly to ensure safety, typically requiring one to four hours to complete. The use of sterile equipment, including needles and containers, is essential to prevent the introduction of disease-causing microorganisms during the procedure.1