Artificial Platelets Catalyze Clotting

Platelets can quickly stanch the bleeding from a cut in your finger, but the hemorrhaging caused by a car crash or a battlefield injury might overwhelm the blood-clotting abilities of these cell fragments. Now, researchers report that they have designed a potential helper for such situations, a synthetic platelet that they show can curtail blood loss in animals.

http://news.sciencemag.org/sciencenow/2009/12/16-02.html