Clinicians have recognized for several decades that there is a high incidence of venous clots and pulmonary emboli in patients after surgery. A recent study from England showed that as many as 5 of 240 women having surgery had blood clots and 270 out of 230,000 died as a result of a clot.
Medical practitioners have been working to resolve this and have come up with a variety of solutions. Today there are new medications like LMWH or low molecular weight heparin that if given before surgery can reduce the incidence of clots. In addition and old treatment such as intermittent pneumatic compression devices can be of great help. These devices squeeze the blood vessels in the lower legs causing the blood to keep moving and thus preventing clots.