In most cases, it is the result of damage to a major artery or an organ like the liver. The researchers report that the hydrogel is made of water, gelatin and a mix of proteins and other chemicals. The researchers also report that they tested their hydrogel by piercing the carotid artery of a test pig and then used their gel to close the wound. The team also tried their hydrogel on a rabbit by cutting and repairing its femoral artery. They also poked a hole in its liver and used the gel to stop the bleeding.
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