A method of electrothermally fusing together pieces of tissue at an interface includes: compressing the tissue pieces together at the interface sufficiently for fusing the tissue pieces together at the interface delivering an impulse of electrical power of no greater than 4.0 seconds time duration which contains sufficient energy to fuse the tissue pieces together at the interface within the time duration of the electrical power impulse converting the electrical power impulse into thermal energy applied at the interface to fuse the tissue pieces and regulating the temperature of the thermal energy applied at the interface in a range of 150° C. to 200° C. while fusing the tissue pieces by controlling characteristics of the electrical power impulse.
