What is the function of the expander in X-Stat?

The function of the expander in X-Stat is to inject expanding sponges into the wound cavity. X-Stat is a device designed for managing traumatic hemorrhages in the prehospital setting. When applied to a wound, the expander works by delivering a specially designed sponge that expands upon contact with blood, which effectively fills the wound space, conforms to the surrounding anatomy, and creates pressure. This helps to control severe bleeding by promoting hemostasis.

The expanding sponges are crucial because they provide immediate hemorrhage control by occluding blood vessels and offering a stable contact surface inside the wound. This method is particularly effective in areas where traditional direct pressure is insufficient due to the volume of bleeding or where the anatomy makes it difficult to apply direct pressure externally.