Infusion devices are widely used in intensive care medicine, e.g. in haemodialysis machines for the treatment of chronic renal diseases. These systems clean the patient’s blood in an extracorporeal cycle in a dialyzer. Diffusion occurs between the blood and a dialysis fluid, which are separated by a biocompatible dialysis membrane. This process removes toxins from the blood that would otherwise remain in the bloodstream due to the kidney damage and the consequently impaired detoxification function. After dialysis, the blood is returned into the patient's circulatory system.
In other use cases, infusion systems are applied for blood transfusion or so-called cardiopulmonary bypass which we know as heart-lung machines. During life-saving surgery, e.g. on the open heart, these systems take over the pumping function of the heart and ensure the blood oxygenation that would otherwise be executed by the lungs.