Nearly half of combat deaths since mid-World War II have been from bleeding out. RevMedx invented XStat to save future soldiers from the same fate. The 1.2-inch-diameter polycarbonate and silicone syringe contains fast-absorbing cellulose sponges coated in a material that helps clot blood. Once injected into a wound, the sponges swell in just 20 seconds to apply hemostatic pressure from within. This can stop bleeding for four hours—often long enough to get the patient to a hospital. And x-ray-detectable threads ensure that a surgeon can see and remove all the saturated sponges.