Therapeutic apheresis is an extracorporeal blood purification procedure that removes harmful pathogens, chemicals or cells from the patient’s blood or plasma. This yields benefits in a variety of medical conditions, including metabolic disorders and autoimmune diseases. In contrast to conventional therapies, no foreign substances are added to the patient’s blood. Instead, pathogenic agents are eliminated in a sophisticated extracorporeal circuit. The blood is returned to the patient’s body immediately after purification.