A process for the preparation of platelet-rich plasma

An object of the present invention is to provide a high platelet-rich plasma active easily and inexpensively. Whole blood obtained by blood, by a process for the preparation of platelet-rich plasma containing a step of adding a water-soluble polymer. For example, a polyamine poly -L- glutamic acid, acidic polysaccharides such as hyaluronic acid, was added to a vinyl polymer in whole blood, by standing a certain time, erythrocytes were selectively promoting to be aggregated and precipitated, the supernatant platelet other, it is possible to obtain a highly active platelet-rich plasma containing a plasma component or leukocyte enriched fibrinogen. The present invention relates to the use of such the platelet-rich plasma and tissue and / or organ repair promoting agents, and also extends to platelet-rich plasma prepared kit.