Evidence
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Most patients undergoing planned surgery do not need compression stockings

Compression stockings might be unnecessary for patients at moderate or high risk of blood clots who are undergoing planned surgery. A study called GAPS suggests that anti-clotting medicine alone is just as effective as using it in combination with compression stockings.  Researchers involved in the large randomised controlled study recommend that guidelines for preventing blood ...

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Age of stored blood used for transfusions in critically ill children doesn’t affect outcomes

Using more recently-collected red blood cells for transfusions does not reduce organ dysfunction, infection or risk of death in critically ill children, compared with blood that has been stored for longer. This large, international trial included more than 1,500 children in paediatric intensive care units. The study provides robust evidence to support the continued practice ...

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Continuing an anticoagulant at home after abdominal surgery cuts thrombosis risk

Continuing to take low molecular weight heparin for two to four weeks after major abdominal surgery significantly reduces the risk of developing a dangerous blood clot. A review of seven studies, mainly in cancer surgery, has found that 13% of patients who received anticoagulant treatment only during their hospital stay developed a clot in the ...

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Significant risk of another thrombosis remains if anticoagulation is stopped

Unprovoked venous thromboembolism (VTE), including deep vein thrombosis in the leg and pulmonary embolism, are clots within veins that occur spontaneously in people without risk factors and are treated with anticoagulant drugs. If those drugs are stopped after three months or more, the risk of another clot appears to be on average 10% in the ...

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A temporary clot-catching filter inserted after major trauma does not prevent lung clots

In adults after major trauma who cannot safely be given anti-clotting drugs, placing a removable metal filter in a major vein to the heart (the inferior vena cava) within 3 days of admission does not reduce their chances of having a clot in their lungs (pulmonary embolus) within 90 days, compared with having no filter. ...

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Reminders to assess clotting risk increase the use of preventive measures

Reminders to assess clotting risk result in more patients being given appropriate anti-clotting measures in hospital. Computer alerts, in particular, are linked to better choice of prophylaxis and fewer blood clots in veins. Clots in deep leg veins or the lungs are common when people are bedbound in hospital. This updated Cochrane review assessed interventions ...

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Prolonging anticoagulant treatment after abdominal cancer surgery reduces clot risk

People who have low molecular weight heparin (LMWH) for between two to four weeks after abdominal or pelvic surgery, especially for cancer, have fewer blood clots in their large veins or lungs. In this review of seven trials, five per cent of people receiving extended treatment experienced a clot compared with 13% who received LMWH ...

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New strategies for maintaining blood supplies from donations may be cost-effective

Opening blood donation centres on weekday evenings and at weekends is a cost-effective way of increasing the blood supply used by hospitals in the UK. Allowing donors to give blood more often could increase supplies in the short term, but it isn’t clear if it would be cost-effective in the long-term. This NIHR-funded modelling study ...

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Warfarin and newer anticoagulants equally effective for long-term treatment of blood clots

Warfarin and newer anticoagulants work equally well to prevent blood clots in extended treatment after venous thromboembolism. One clot is prevented for every 15 people receiving either anticoagulant. Aspirin is ineffective. Following venous thromboembolism – a blood clot in the deep leg veins (deep vein thrombosis) or lungs (pulmonary embolism) – anticoagulant treatment is given ...

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People leaving hospital after medical illness do not benefit from extended clot reducing treatment

Taking rivaroxaban after discharge from hospital does not significantly reduce the risk of venous thromboembolism, either blood clots in large veins or of dying from clots travelling to the lungs. People who are hospitalised with conditions such as heart failure and stroke are at an increased risk of blood clots. This risk is further increased ...

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