Blood Filtering Apparatus with 2-3 Micron Cell Filter

The patent replaces the centrifugal mechanical separation system with a filtration-based separation system. The filtration system uses a filter with specific pore sizes (2-3 μm for RBCs, 0.5-2 μm for platelets) to separate blood components without the mechanical forces that cause cell damage in centrifugal methods. This substitution maintains separation efficiency while preserving cell integrity.

The patent extracts the core separation function from the complex centrifugal equipment and implements it through a simple filtration system. The filter membrane with controlled pore sizes performs the separation function that previously required entire centrifugal machines, skilled operators, and complex control systems. This reduces device complexity while maintaining separation capability.

The patent uses porous filter materials with specific pore size ranges (0.5-2 μm for platelet filtration) that allow gentle separation of platelets from blood without the mechanical stress of centrifugation. This gentle filtration method preserves platelet viability and function, extending the shelf life of platelet concentrates while maintaining effective platelet recovery.

The patent enables autologous blood separation where each patient's blood is filtered and processed individually using the portable filtration device. The blood components are separated and can be reinfused into the same patient, eliminating the need to combine components from different donors. This self-service approach maintains blood product availability for autologous transfusion while eliminating immunological complications associated with allogeneic transfusions.