Filter

Abstract

A filter, in particular for the separation of leucocytes from further blood components, has an outer sheath, at least one intermediate layer which is a component of a frame or which forms a frame, an inlet chamber which is in communication with an inlet for the medium to be filtered, an outlet chamber which is in communication with an outlet for the filtrate, and a filter material which separates the inlet chamber from the outlet chamber. The filter is particularly low in dead space and can be centrifuged in a simple manner since the filter material is encompassed between the outer sheath and the intermediate layer.

Description

technical field [0001] The invention relates to a filter especially for separating leukocytes from other blood components, the filter has an outer sheath, at least one part being a frame or an intermediate layer forming a frame, and an inlet communicating with the medium to be filtered An inlet chamber and an outlet chamber communicated with the filtrate outlet, and a filter material separating the inlet chamber and the outlet chamber. Background technique [0002] Filters of this type are used, for example, to release blood or blood components from leukocytes before blood storage or transfusion to a recipient, since said leukocytes may cause undesired side effects. It is therefore necessary to separate leukocytes and (optionally) other interfering substances before storing or transporting blood or its components (eg hemoglobin, plasma). [0003] Such filters are known in numerous different embodiments. The filter disclosed in EP 0 526 678 B2 has a sheath made of a bendabl...

AI Technical Summary

Problems solved by technology

The disadvantage of the filter known from WO 01 / 91880 A1 is that it has short tubes on opposite sides of the outer sheath for the inflow of blood and the outflow of filtrate respectively, so that on both sides of the filter it cannot be formed as Desirable flat surface for centrifugation purposes

[0005] The disadvantage of the filter device known from EP 0 526 678 B2 is that in the region of the frame surrounding the filter material a dead space is created in which blood cannot be filtered

This is undesirable because, on the one hand, the available filter space cannot be fully utilized; on the other hand, it has the disadvantage that valuable blood components may accumulate in this dead space, where they cannot be recovered, or can only be Difficult to regain after filtering

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