A surgical apparatus for energy welding or otherwise joining two segments of living tissue, usually tubular in structure, comprising, means for clamping the first tissue section, means for clamping the second tissue section, means for moving one of said clamping means toward said other clamping means to bring the first and second sections into abutting relationship to form a seam. Means for transmitting energy to the seam may be provided to weld together the first and second sections. The means for clamping the first section comprises a first pair of opposed arms and the means for clamping the second section comprises a second pair of opposed arms, wherein at least one of said arms of each said pair of arms is pivotably connected to said opposing arm. The energy transmitting means comprises first and second housing sections adapted to be placed over opposing sides of the clamping means wherein each of the housing sections has a plurality of energy transmissive elements extending therethrough. The distal end of the energy transmissive elements terminates near the seam.