The use of heparin following surgery is common if there are no issues with bleeding. Generally, a risk-benefit analysis is required, as all anticoagulants lead to an increased risk of bleeding. In people admitted to hospital,<unk>  is a major cause for complications and occasionally death. In the UK, for instance, the Parliamentary Health Select Committee heard in 2005 that the annual rate of death due to<unk>  was 25,000, with at least 50% of these being hospital-acquired. Hence<unk> oprophylaxis (prevention of<unk>  is increasingly emphasized. In patients admitted for surgery, graded compression stockings are widely used, and in severe illness, prolonged immobility and in all orthopedic surgery, professional guidelines recommend low molecular weight heparin (LMWH) administration, mechanical calf compression or (if all else is contraindicated and the patient has recently suffered deep vein<unk>  the insertion of a vena cava filter. In patients with medical rather than surgical illness, LMWH too is known to prevent<unk> , and in the United Kingdom the Chief Medical Officer has issued guidance to the effect that preventative measures should be used in medical patients, in anticipation of formal guidelines.
Thrombosis
Thrombus
Angiopathy
Sclerosis 
Calcification
Infarction
Adhesion 
Abscess