The operation procedure of immunosorption is mainly a plasma separation operation through extracorporeal circulation, and its mechanism of action is to purify blood by using plasma replacement. Immunosorption refers to a blood purification therapy in which the patient’s blood is drawn out of the body and then firstly, through the plasma separator, the plasma is separated, and then the plasma comes into contact with the adsorbent in the solid phase to remove certain endogenous disease-causing substances or exogenous drugs or poisons in the plasma in the adsorption mode, and the purified plasma is then infused back to the patient together with the circulating blood, so that a therapeutic purpose can be achieved. When using bioaffinity adsorbent such as staphylococcal protein A adsorbent and antigen-antibody binding adsorbent as adsorbent material to carry out the treatment, it is called immunosorbent therapy. 1. Operation process: first establish extracorporeal circulation, draw the patient’s blood out of the body for anticoagulation, use plasma separator to separate the plasma, and then introduce the blood into the immunosorbent. Then the blood is introduced into the immunosorbent. At this time, it can be contacted with the immunosorbent in the adsorbent, and the disease-causing substances in the blood can be removed by adsorption, and then the purified blood can be infused back into the patient’s body. 2. Mechanism of action: Immunosorbent therapy is a new technology based on plasma replacement, which can completely and thoroughly adsorb disease-causing factors in blood to achieve the purpose of blood purification. It can completely and thoroughly adsorb the disease-causing factors in the blood to achieve the purpose of blood purification, and the blood transfused into the patient is his own blood, so it can effectively prevent the spread of infectious diseases. It is recommended to complete the immunosorbent therapy under the guidance of a professional doctor.