The cautery phantom senior design team will engineer and improve a system that will arrest artificial blood flow in response to electrocautery in a tissue phantom manufactured by Simulated Inanimate Models, LLC (SIM). To solve this problem, we have investigated methods of vessel constriction by lining the tissue phantom blood vessel wall with a thermoresponsive material, coagulating the artificial blood by introducing proteins and chemicals into the mixture, and by making the blood vessel with a shape memory polymer.