A hemostatic agent is a substance used to promote hemostasis, which is the process of stopping bleeding. These agents can be applied to wounds or surgical sites to help control blood loss. They work by enhancing the body's natural clotting mechanisms or by providing a physical barrier to bleeding. There are various types of hemostatic agents, including gelatin sponges, collagen-based products, and synthetic polymers. Each type has specific applications and benefits, making them useful in different medical situations, such as trauma care or during surgical procedures.