Blood Bags​ are medical devices used for blood collection, blood transfusion, and separation of blood components. it normally consist of needle for collection blood, transfer tubes, bag for storage of blood. and It has the advantages of convenient operation and avoiding blood contamination. Because of its safety and practicability, it has been clinically accepted, and it has been widely used in various blood stations and hospitals. Blood Bags' suitable air permeability and excellent pressure resistance are beneficial to the normal metabolism of blood, especially platelets, on the one hand, and on the other hand, they can also effectively reduce the damage rate of blood bags, which is an important condition for ensuring blood quality. Next, let's take a look at the handling and storage of a Blood Bag after a blood transfusion.