A device (9) for extracting at least one blood component contained in a main bag (1) of a bag system, said bag system comprising, in addition, at least one solution bag (4) containing an additive solution for said bag. blood component and at least one collection bag (3) satellite intended to collect said blood component to which said additive solution has been added, said bags (1, 3, 4) being connected to each other by conduits, said device comprising: - an extraction device (14) intended to extract the blood component by compression from the main bag (1), and - a control device (15) intended to allow the transfer of said extracted component or said extracted component and the additive solution , in the bag (3) satellite collection through ducts, characterized in that it further comprises: - a stirring device (16) intended to agitate the satellite bag (3) of collection, and - a control system for controlling said extraction device (14), said control device (15) and said agitation device (16) being designed to allow homogeneous mixing of the extracted blood component and the additive solution in said bag (3) collection satellite.Un dispositivo (9) para extraer al menos un componente sanguíneo contenido en una bolsa (1) principal de un sistema de bolsas, comprendiendo dicho sistema de bolsas, además, al menos una bolsa (4) de solución que contiene una solución aditiva para dicho componente sanguíneo y al menos una bolsa (3) satélite de recolección destinada a recolectar dicho componente sanguíneo al que se le ha añadido dicha solución aditiva, estando dichas bolsas (1, 3, 4) conectadas entre sí por conductos, dicho dispositivo que comprende: - un dispositivo (14) de extracción destinado a extraer el componente sanguíneo por compresión de la bolsa (1) principal, y - un dispositivo (15) de control destinado a permitir la transferencia de dicho componente extraído o dicho componente extraído y la solución aditiva, en la bolsa (3) satélite de recolección a través de condu
