Bag-set for use in centrifugal separation

(57) Are a bag system for summary centrifugal separation, and The outside, It is a system which it makes from the central portions of the outside bag (1) which essentially carried out the ring form, and this ring, crawls between one the insides of the desirable central inner bag (2) which can be removed from this ring, and the above-mentioned bag again, and contains the connection channel of shoes. According to this invention, this bag system makes the above-mentioned bag the surroundings of the central part at a cone by having the hard circular central part (16) which attaches an outside this bag to the position for centrifugal separation, then packing and shortening the ring of an outside this bag. An inner bag is arranged in the cave (17) in this central part, when this cave fills this inner bag with a liquid, a spread of the radial direction of the above-mentioned bag is restricted, but expansion of the direction of an axis is arranged so that it may approve. This invention relates also to the directions for this bag system for centrifugal separation to recover marrow cells from marrow suspension in order to obtain the blood platelet suspension of a 軟 film fraction by centrifugal separation.