the_newsbeagle writes: A seriously wounded person can bleed out within minutes. So first responders, battlefield medics, and surgeons will all be interested in this new technology: a "neural tourniquet" that stops blood loss by zapping a nerve. The handheld device stimulates the vagus nerve to send an electrical signal through the nerve to the spleen, where the blood cells responsible for forming clots receive instructions. This signal primes the cells so that they form clots faster if they encounter a wound anywhere in the body; a study in pigs showed 40% less bleeding time and 50% less blood loss. A startup called Sanguistat is testing the device first as a treatment for postpartum hemorrhage.