Abstract: A bridge is attachable to and mountable upon the upper edge of a centrifuge cup for suspending a blood collection bag within the cavity of the centrifuge cup during centrifugation of the collected blood. The bridge includes structure for supporting the bridge upon an expressor to permit expressing the centrifuged blood from the bridge suspended blood collection bag.

Abstract: A blood bag support system is described which is very useful for supporting a blood bag in a centrifuge. The support system includes two upright support members and horizontal connecting means extending between the upright supports. A blood bag is suspended from the connecting means. The support system is balanced so as to avoid vortexing or mixing inside the blood bag during centrifuging. The support system holds up the ports at the top of the bag, enabling red blood cells in the ports to be forced downwardly during centrifuging. This prevents contamination of blood components with red blood cells.

Abstract: A weight monitor includes a first part for attachment to a pedestal or other support member and a second part for suspending a blood collection bag to be filled by a flow of blood from a donor. A trough shaped spring interconnects the first and second parts and retains the second part in fixed positional relationship to the first part until the bending force imposed upon the spring by the filling blood collection bag exceeds a predetermined value at which point the spring flexes abruptly and the second part becomes positionally reoriented with respect to the first part. A clamp, associated with the fill tube of the blood collection bag, is actuated by the reorientation of the second part to terminate further flow of blood through the fill tube into the blood collection bag.