The invention relates to an elutriation chamber for an elutriator system for washing and/or isolating cells, in particular thrombocytes, which elutriation chamber comprises a feed line (1) for an aqueous medium containing the cells to be washed and/or to be isolated in suspended form, and a discharge line (2) for the washed and/or isolated cells, wherein the chamber (5) is rotationally symmetrical to the axis (a), characterized in that the ratio of the area of the section through the lumen of the chamber (5) perpendicular to the axis (a) at the widest point (5a-5b) to the area of the section (1a) through the feed line (1) is in the range of 1,000 to 250,000.
