Disposable plastic blood bag is a sealed container integrating blood collection, separation, transfer, storage and infusion. It is composed of blood collection tube, blood collection needle, blood transfusion socket, anticoagulant and transfer tube. It has the advantages of convenient operation and avoiding blood pollution, and is widely used in the field of modern clinical medicine.

1、 Air permeability of disposable plastic blood bag

Blood is composed of plasma and blood cells, including red blood cells, white blood cells and platelets. With the gradual deepening of the concept of scientific blood use, the demand for blood components is increasing, so it is necessary to separate the collected blood to make various components of blood. Platelets play an important role in hemostasis and vascular repair. When patients suffer from severe bleeding due to thrombocytopenia or abnormal function, they must be treated with platelet transfusion. However, whole blood transfusion not only has low platelet concentration and poor treatment effect, but also causes cardiac burden due to the increase of blood volume. Therefore, there is an increasing demand for platelets in clinic.

2、 Damage and pressure resistance of disposable plastic blood bag

Blood separation mainly refers to the separation process of red blood cells and good plasma. Put the blood bag into the centrifuge. Because the red blood cells are heavier than the plasma, under the action of centrifugal force, the red blood cells precipitate below the blood bag and the plasma floats above. After virus inactivation, the two enter different blood bags under closed conditions to complete the separation process. In this process, the blood bag is damaged from time to time, and the resulting blood loss is increasingly prominent.