Abstract: The present invention provides devices and methods for treating wounds. The devices may include polymer particles capable of absorbing fluid such as blood. When devices of the invention are exposed to fluid, the fluid may enter the device and cause the polymer particles to swell. Devices of the invention may also apply pressure on wound cavities to stop or restrict the flow of fluid. In some embodiments, the devices may comprise components to facilitate absorption of fluid throughout the device, such as wicking elements and/or multiple compartments. One or more of the devices can be placed directly in the wound cavity, or in a containment structure and then into the wound cavity.

Abstract: A sealing device for a body suit and a sealing method utilize a reactive seal that incorporates a swelling polymer activated upon contact with a fluid medium, such as water. The reactive seal can be embodied in a neck seal, wrist seal, or ankle seal of the body suit, where the reactive seal is designed to be loose and comfortable to wear, only exerting sealing pressure when needed. The swelling polymer can be a superabsorbent hydrogel such as a blend of polyacrylate polymer with poly-anionic beads (PAB). In one application, a 50/50 blend of polyacrylate and PAB is used, such that the reactive seal can autonomously tighten within about 10 to 15 seconds. The device and method can be used in various other applications to form a seal for preventing the passage of fluid from one volume to another.