E-BiInSn Enhanced Rigidity Alterable Artificial Bandage

In surgery, orthopedic cast is often implemented to stabilize and fix anatomical structures like broken bones. Plaster could harden after mixed with water, thus it is commonly utilized with cotton bandage to form a solid structure to encase a limb or other body parts. As plaster is heavy and impervious, cast could easily result in itching, rashes, allergic contact dermatitis or other cutaneous complications. In this paper we present a novel implementation for surgical fixation with low melting point alloy (LMPA) stuffed in silicone tubes, which is dubbed “LMPA enhanced bandage The alloy is heated by an enameled copper wire to alter the stiffness. When the alloy is in solid state, the bandage could withstand high load without significant deformation, while if heated to its melting point, the entire bandage would soften. We present several conceptual experiments to evaluate the mechanical performance and body fixation of the proposed bandage. Phase change process and temperature variation were recorded by an infrared camera. Preliminary results showed that the present fixation bandage design owns sufficient mechanical strength and necessary thermal response performance to meet the requirement of clinical applications.