(4) Strategies aimed at prevention of DVT/PE among hospital patients are much more rigorously applied now than was the case in 2004. All hospital patients are now assessed for risk of venous thromboembolism at the time of admission. Simply by virtue of the elective procedure (hip replacement) that Mrs Waters was about to undergo she would have been identified as 'at risk'. Her underlying chronic condition, rheumatoid arthritis would have been identified as one that increases that risk. She would now receive both mechanical and pharmaceutical prophylaxis within hours of her operation (subject to pre-operative assessment of bleeding risk), and would be encouraged to drink sufficiently to avoid postoperative dehydration. Mobility would also be encouraged as soon after the operation as possible, and she would be educated before discharge about how she can contribute to avoidance of VTE during convalescence. All these measures ensure that it is much less likely that Mrs Waters would suffer post-operative VTE if she received a hip replacement today.