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Blood-Clotting Injection Could Save Accident Victims

Fri, 08/13/2010 - 5:30am

If recently injured patients with serious bleeding were to receive a cheap, widely available and easily administered drug to help their blood to clot, tens of thousands of lives could be saved every year, according to a paper published on-line today by The Lancet.

Dr Ian Roberts, Professor of Epidemiology at the London School of Hygiene and Tropical Medicine (LSHTM), revealed that results from a trial show that early administration of tranexamic acid (TXA) to patients with recent, severe bleeding injuries saves lives, with no evidence of adverse effects from unwanted clotting.

The trial, named CRASH-2, was a large, randomized event involving over 20,000 adult patients in 274 hospitals across 40 countries, and was funded by England's National Institute for Health Research (NIHR) Health Technology Assessment program. This is the first trial of TXA in injured patients, although smaller trials have shown that it reduces bleeding in patients undergoing major surgery.

TXA is an off-patent drug, manufactured by a number of different companies. The cost per gram is about $4.50.

The drug helps by reducing clot breakdown. Although this would be advantageous in patients with severe bleeding, doctors were worried that TXA might increase the risk of complications, such as heart attacks, strokes and clots in the lungs. The results of this large trial show that TXA reduces death from bleeding without any increase in these complications.

“Each year about 600,000 injured patients bleed to death worldwide,” said Professor Roberts. “Injuries may be accidental, for example, traffic crashes, or intentional, such as shootings, stabbings or land mine injuries and the majority of deaths occur soon after injury.”

Severely injured adults were enrolled in the trial if they had significant bleeding, or were at risk of significant bleeding and were within a few hours of injury. They were randomly allocated to receive either one gram of TXA by injection, followed by another one gram in a drip over the following eight hours, or a matching placebo. The researchers studied the numbers of deaths in hospital within four weeks of injury in the two groups and found that TXA reduced the chances of death due to massive blood loss by about one-sixth.

The researchers estimate that administering TXA soon after injury could prevent up to 100,000 deaths per year across the world. “The large numbers of patients treated in very different healthcare settings around the world means we can be sure that prompt use of TXA will be of benefit to trauma patients in all kinds of facilities. We believe that doctors across the world should now consider using it to improve accident victims' chances of survival and that it should be considered for inclusion in the WHO List of Essential Medicines,” Professor Roberts concluded.

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