Post-op transfusions for cardiac patients 'wasting blood supplies' (UK)

"Blood transfusions routinely carried out after heart surgery could be wasting vital blood supplies and putting patients at risk, researchers suggest. Cardiac surgery uses almost ten per cent of all donor blood in Britain. Although the benefits of red-cell blood transfusions for managing life-threatening bleeding are clear, researchers at the University of Bristol believe that routine transfusions given after cardiac operations may be unnecessary and cause more medical problems than they solve" - Telegraph