Thats what we pictured as the perfect solution: something you could spray in, it would expand, and bleeding stops, former medic and RevMedx co-founder John Steinbaugh told Popular Science. But we found that blood pressure is so high, blood would wash the foam right out. The sponges — which are standard medical sponges that have been compressed and coated with a hemostatic agent called chitosan — take just 15 seconds to expand once theyre in the wound. According to the company, when tested on swine the sponges provided a significant improvement in survival an hour after the injury.
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