| 摘要 |
The invention relates to a filter medium (31) comprising two porous zones positioned in the form of a stack: a first porous zone (100), known as the pre-filtration zone, treated with at least one reagent having an affinity for red blood cells and leading to the capture or agglutination of red blood cells on the pre-filtration zone; and a second porous zone (200), known as the asymmetric zone, having a porosity that decreases transversely to the thickness, the area with highest porosity being positioned on the side of the pre-filtration zone (100). The invention also relates to systems, devices and methods using said medium. |
