"Every US marine and navy soldier in Iraq and Afghanistan carries QuikClot. Its maker, Z-Medica of Wallingford, Connecticut, claims it has saved 150 lives so far. The porous mineral powder is poured into the wound, where pores quickly absorb water, which concentrates the blood's clotting factors and so speeds up clotting. In lab tests, blood treated with QuikClot clots in less than 2 minutes, compared with the 10 minutes or so for untreated blood. In studies on pigs with severed arteries, the survival rate was 100 per cent; with a standard gauze dressing, more than half the animals died."
Sounds useful. Sick, but useful.